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Climate and Average Weather Year Round at Upper Cumberland Regional Airport Tennessee, United States

At Upper Cumberland Regional Airport, the summers are hot and muggy, the winters are very cold, and it is wet and partly cloudy year round. Over the course of the year, the temperature typically varies from 28°F to 89°F and is rarely below 12°F or above 95°F.

Based on the tourism score, the best times of year to visit Upper Cumberland Regional Airport for warm-weather activities are from mid May to mid June and from late July to early October.

Climate at Upper Cumberland Regional Airport

coldcoolwarmhotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow67%67%41%41%clearovercastprecipitation: 4.9 inprecipitation: 4.9 in2.9 in2.9 inmuggy: 86%muggy: 86%0%0%drydrytourism score: 5.9tourism score: 5.90.70.7
Upper Cumberland Regional Airport weather by month. Click on each chart for more information.

The hot season lasts for 3.9 months, from May 23 to September 19, with an average daily high temperature above 81°F. The hottest month of the year at Upper Cumberland Regional Airport is July, with an average high of 89°F and low of 66°F.

The cold season lasts for 3.0 months, from November 26 to February 29, with an average daily high temperature below 56°F. The coldest month of the year at Upper Cumberland Regional Airport is January, with an average low of 29°F and high of 48°F.

Average High and Low Temperature at Upper Cumberland Regional Airport

Average High and Low Temperature at Upper Cumberland Regional AirporthotcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 2348°FJan 2348°FJul 2089°FJul 2089°F28°F28°F66°F66°FMay 2381°FMay 2381°FSep 1981°FSep 1981°FNov 2656°FNov 2656°FFeb 2956°FFeb 2956°F57°F57°F55°F55°F35°F35°F35°F35°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 48°F51°F61°F71°F79°F86°F89°F87°F82°F70°F60°F51°F
Temp. 37°F40°F48°F58°F66°F74°F77°F75°F68°F56°F47°F40°F
Low 29°F32°F39°F46°F55°F63°F66°F64°F56°F45°F37°F32°F

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature at Upper Cumberland Regional Airport

Average Hourly Temperature at Upper Cumberland Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNowNowvery coldvery coldvery coldcoldcoldcoolcoolcomfortablewarmhotfreezing
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Ābādeh, Iran (7,068 miles away) is the far-away foreign place with temperatures most similar to Upper Cumberland Regional Airport (view comparison).

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At Upper Cumberland Regional Airport, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year at Upper Cumberland Regional Airport begins around June 13 and lasts for 5.1 months, ending around November 17.

The clearest month of the year at Upper Cumberland Regional Airport is August, during which on average the sky is clear, mostly clear, or partly cloudy 65% of the time.

The cloudier part of the year begins around November 17 and lasts for 6.9 months, ending around June 13.

The cloudiest month of the year at Upper Cumberland Regional Airport is January, during which on average the sky is overcast or mostly cloudy 57% of the time.

Cloud Cover Categories at Upper Cumberland Regional Airport

Cloud Cover Categories at Upper Cumberland Regional AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Sep 2067%Sep 2067%Jan 341%Jan 341%Jun 1354%Jun 1354%Nov 1754%Nov 1754%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier 57%55%52%47%48%46%42%35%35%37%46%55%
Clearer 43%45%48%53%52%54%58%65%65%63%54%45%

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Upper Cumberland Regional Airport varies throughout the year.

The wetter season lasts 4.7 months, from March 30 to August 20, with a greater than 34% chance of a given day being a wet day. The month with the most wet days at Upper Cumberland Regional Airport is June, with an average of 12.5 days with at least 0.04 inches of precipitation.

The drier season lasts 7.3 months, from August 20 to March 30. The month with the fewest wet days at Upper Cumberland Regional Airport is October, with an average of 7.5 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone at Upper Cumberland Regional Airport is June, with an average of 12.5 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 45% on June 28.

Daily Chance of Precipitation at Upper Cumberland Regional Airport

Daily Chance of Precipitation at Upper Cumberland Regional AirportwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jun 2845%Jun 2845%Oct 1423%Oct 1423%Mar 3034%Mar 3034%Aug 2034%Aug 2034%NowNowrainmixed
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 7.5d7.5d9.6d10.1d12.1d12.5d12.8d10.5d8.3d7.5d8.1d8.6d
Mixed 1.3d1.0d0.3d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.2d0.8d
Snow 0.6d0.4d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.1d0.2d
Any 9.4d8.9d10.1d10.2d12.1d12.5d12.8d10.5d8.3d7.5d8.3d9.6d

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Upper Cumberland Regional Airport experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year at Upper Cumberland Regional Airport. The month with the most rain at Upper Cumberland Regional Airport is December, with an average rainfall of 4.5 inches.

The month with the least rain at Upper Cumberland Regional Airport is October, with an average rainfall of 3.0 inches.

Average Monthly Rainfall at Upper Cumberland Regional Airport

Average Monthly Rainfall at Upper Cumberland Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 inDec 14.8 inDec 14.8 inAug 242.9 inAug 242.9 inApr 304.4 inApr 304.4 inJul 23.8 inJul 23.8 inJan 163.8 inJan 163.8 inOct 192.9 inOct 192.9 inNowNow
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall 3.8″4.0″4.2″4.3″4.1″3.7″3.7″3.0″3.2″3.0″4.1″4.5″

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Upper Cumberland Regional Airport experiences some seasonal variation in monthly snowfall.

The snowy period of the year lasts for 3.0 months, from December 8 to March 7, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow at Upper Cumberland Regional Airport is February, with an average snowfall of 2.1 inches.

The snowless period of the year lasts for 9.0 months, from March 7 to December 8. The least snow falls around July 24, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall at Upper Cumberland Regional Airport

Average Monthly Snowfall at Upper Cumberland Regional AirportsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 inFeb 12.4 inFeb 12.4 inJul 240.0 inJul 240.0 inDec 81.0 inDec 81.0 inMar 71.0 inMar 71.0 inNowNow
The average snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Snowfall 2.1″2.1″0.5″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.2″1.3″

The length of the day at Upper Cumberland Regional Airport varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 42 minutes of daylight; the longest day is June 20, with 14 hours, 37 minutes of daylight.

Hours of Daylight and Twilight at Upper Cumberland Regional Airport

Hours of Daylight and Twilight at Upper Cumberland Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 1912 hr, 7 minMar 1914 hr, 37 minJun 2014 hr, 37 minJun 2012 hr, 10 minSep 2212 hr, 10 minSep 229 hr, 42 minDec 219 hr, 42 minDec 21nightnightdayNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight 10.0h10.9h12.0h13.1h14.1h14.6h14.3h13.5h12.4h11.2h10.3h9.8h

The earliest sunrise is at 5:24 AM on June 13, and the latest sunrise is 1 hour, 42 minutes later at 7:06 AM on November 2. The earliest sunset is at 4:27 PM on December 4, and the latest sunset is 3 hours, 36 minutes later at 8:03 PM on June 28.

Daylight saving time (DST) is observed at Upper Cumberland Regional Airport during 2024, starting in the spring on March 10, lasting 7.8 months, and ending in the fall on November 3.

Sunrise & Sunset with Twilight and Daylight Saving Time at Upper Cumberland Regional Airport

Sunrise & Sunset with Twilight and Daylight Saving Time at Upper Cumberland Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 135:24 AMJun 135:24 AM8:03 PMJun 288:03 PMJun 28Dec 44:27 PMDec 44:27 PM7:06 AMNov 27:06 AMNov 2Mar 10DSTMar 10DSTDSTNov 3DSTNov 3daynightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2024. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth at Upper Cumberland Regional Airport

Solar Elevation and Azimuth at Upper Cumberland Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AM000101010102020203030304040405050606070000101010202020203030304040405050607077NowNow
northeastsouthwest
Solar elevation and azimuth over the course of the year 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

Moon Rise, Set & Phases at Upper Cumberland Regional Airport

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Upper Cumberland Regional Airport experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 4.5 months, from May 10 to September 26, during which time the comfort level is muggy, oppressive, or miserable at least 22% of the time. The month with the most muggy days at Upper Cumberland Regional Airport is July, with 25.9 days that are muggy or worse.

The month with the fewest muggy days at Upper Cumberland Regional Airport is February, with 0.0 days that are muggy or worse.

Humidity Comfort Levels at Upper Cumberland Regional Airport

Humidity Comfort Levels at Upper Cumberland Regional AirportmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Dec 210%Dec 210%86%Jul 2386%Jul 23May 1022%May 1022%Sep 2622%Sep 2622%NowNowmiserablemiserableoppressiveoppressivemuggymuggydrydryhumidhumid
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 0.0d0.0d0.1d1.5d9.4d20.1d25.9d23.4d11.5d2.2d0.2d0.0d

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed at Upper Cumberland Regional Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.3 months, from October 30 to May 7, with average wind speeds of more than 4.8 miles per hour. The windiest month of the year at Upper Cumberland Regional Airport is February, with an average hourly wind speed of 6.1 miles per hour.

The calmer time of year lasts for 5.7 months, from May 7 to October 30. The calmest month of the year at Upper Cumberland Regional Airport is August, with an average hourly wind speed of 3.5 miles per hour.

Average Wind Speed at Upper Cumberland Regional Airport

Average Wind Speed at Upper Cumberland Regional AirportwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mph9 mph9 mph10 mph10 mphFeb 256.2 mphFeb 256.2 mphJul 313.4 mphJul 313.4 mphOct 304.8 mphOct 304.8 mphMay 74.8 mphMay 74.8 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 5.86.16.05.54.53.83.53.54.04.55.15.5

The predominant average hourly wind direction at Upper Cumberland Regional Airport varies throughout the year.

The wind is most often from the west for 1.0 months, from July 2 to August 2, with a peak percentage of 35% on July 13. The wind is most often from the south for 11 months, from August 2 to July 2, with a peak percentage of 38% on January 1.

Wind Direction at Upper Cumberland Regional Airport

Wind Direction at Upper Cumberland Regional AirportSWSJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsoutheastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

To characterize how pleasant the weather is at Upper Cumberland Regional Airport throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Upper Cumberland Regional Airport for general outdoor tourist activities are from mid May to mid June and from late July to early October, with a peak score in the first week of September.

Tourism Score at Upper Cumberland Regional Airport

Tourism Score at Upper Cumberland Regional Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.95.90.70.75.45.45.15.1NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationtourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Upper Cumberland Regional Airport for hot-weather activities is from mid June to early September, with a peak score in the second week of August.

Beach/Pool Score at Upper Cumberland Regional Airport

Beach/Pool Score at Upper Cumberland Regional Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.35.30.00.0NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationbeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season at Upper Cumberland Regional Airport typically lasts for 6.2 months (188 days), from around April 10 to around October 15, rarely starting before March 22 or after April 29, and rarely ending before September 26 or after November 3.

Time Spent in Various Temperature Bands and the Growing Season at Upper Cumberland Regional Airport

Time Spent in Various Temperature Bands and the Growing Season at Upper Cumberland Regional Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 1050%Apr 1050%Oct 1550%Oct 1590%Apr 2990%Apr 2990%Sep 2690%Sep 2610%Mar 2210%Mar 2210%Nov 310%Nov 30%Dec 130%Dec 13Jul 13100%Jul 13100%freezingvery coldcoldcoolcomfortablewarmhotfrigid
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms at Upper Cumberland Regional Airport should appear around February 29, only rarely appearing before February 12 or after March 17.

Growing Degree Days at Upper Cumberland Regional Airport

Growing Degree Days at Upper Cumberland Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°F3,500°F3,500°F4,000°F4,000°F4,500°F4,500°FFeb 2987°FFeb 2987°FMay 24900°FMay 24900°FJul 21,800°FJul 21,800°FDec 314,284°FDec 314,284°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year.

The brighter period of the year lasts for 4.5 months, from April 16 to September 1, with an average daily incident shortwave energy per square meter above 5.7 kWh. The brightest month of the year at Upper Cumberland Regional Airport is June, with an average of 6.6 kWh.

The darker period of the year lasts for 3.0 months, from November 10 to February 8, with an average daily incident shortwave energy per square meter below 3.1 kWh. The darkest month of the year at Upper Cumberland Regional Airport is December, with an average of 2.3 kWh.

Average Daily Incident Shortwave Solar Energy at Upper Cumberland Regional Airport

Average Daily Incident Shortwave Solar Energy at Upper Cumberland Regional AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 196.6 kWhJun 196.6 kWhDec 232.2 kWhDec 232.2 kWhApr 165.7 kWhApr 165.7 kWhSep 15.7 kWhSep 15.7 kWhFeb 83.1 kWhFeb 83.1 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh) 2.53.44.55.76.36.66.56.25.34.12.92.3

This report illustrates the typical weather at Upper Cumberland Regional Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

Upper Cumberland Regional Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back include but are not limited to Crossville Memorial Airport, Smyrna Airport, Wayne County Airport, Glasgow Municipal Airport, Lovell Field, Nashville International Airport, Bowling Green-Warren County Regional Airport, and Oak Ridge.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

Please review our full terms contained on our Terms of Service page.