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Climate and Average Weather Year Round at Union County Airport Ohio, United States

At Union County Airport, the summers are long and warm; the winters are freezing, snowy, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 19°F to 83°F and is rarely below 1°F or above 90°F.

Based on the tourism score, the best time of year to visit Union County Airport for warm-weather activities is from mid June to mid September.

Climate at Union County Airport

very coldcoldcoolwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow69%69%38%38%clearovercastprecipitation: 3.5 inprecipitation: 3.5 in1.7 in1.7 inmuggy: 43%muggy: 43%0%0%drydrytourism score: 6.7tourism score: 6.70.10.1
Union County Airport weather by month. Click on each chart for more information.

The warm season lasts for 4.0 months, from May 22 to September 21, with an average daily high temperature above 74°F. The hottest month of the year at Union County Airport is July, with an average high of 83°F and low of 63°F.

The cold season lasts for 3.0 months, from December 2 to March 2, with an average daily high temperature below 44°F. The coldest month of the year at Union County Airport is January, with an average low of 21°F and high of 35°F.

Average High and Low Temperature at Union County Airport

Average High and Low Temperature at Union County AirportwarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 2935°FJan 2935°FJul 1983°FJul 1983°F19°F19°F64°F64°FMay 2274°FMay 2274°FSep 2174°FSep 2174°FDec 244°FDec 244°FMar 244°FMar 244°F53°F53°F51°F51°F30°F30°F27°F27°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 35°F39°F50°F62°F72°F80°F83°F81°F75°F64°F51°F40°F
Temp. 27°F30°F39°F50°F61°F70°F73°F71°F64°F53°F42°F32°F
Low 21°F23°F31°F41°F51°F60°F63°F61°F53°F43°F34°F26°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 Union County Airport

Average Hourly Temperature at Union County 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 AMNowNowfreezingvery coldvery coldcoldcoldcoolcomfortablecomfortablewarmfreezingfreezing
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.

Buzău, Romania (5,133 miles away) is the far-away foreign place with temperatures most similar to Union County Airport (view comparison).

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At Union County 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 Union County Airport begins around June 10 and lasts for 4.8 months, ending around November 2.

The clearest month of the year at Union County Airport is August, during which on average the sky is clear, mostly clear, or partly cloudy 68% of the time.

The cloudier part of the year begins around November 2 and lasts for 7.2 months, ending around June 10.

The cloudiest month of the year at Union County Airport is January, during which on average the sky is overcast or mostly cloudy 62% of the time.

Cloud Cover Categories at Union County Airport

Cloud Cover Categories at Union County AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 2269%Aug 2269%Jan 238%Jan 238%Jun 1053%Jun 1053%Nov 253%Nov 253%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 62%60%55%51%50%45%37%32%33%41%51%60%
Clearer 38%40%45%49%50%55%63%68%67%59%49%40%

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

The wetter season lasts 4.7 months, from March 28 to August 18, with a greater than 30% chance of a given day being a wet day. The month with the most wet days at Union County Airport is June, with an average of 11.9 days with at least 0.04 inches of precipitation.

The drier season lasts 7.3 months, from August 18 to March 28. The month with the fewest wet days at Union County Airport is January, with an average of 6.3 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 Union County Airport is June, with an average of 11.9 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 41% on May 25.

Daily Chance of Precipitation at Union County Airport

Daily Chance of Precipitation at Union County AirportwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%May 2541%May 2541%Jan 2919%Jan 2919%Mar 2830%Mar 2830%Aug 1830%Aug 1830%NowNowrainsnowmixed
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 3.9d3.6d6.9d9.6d12.1d11.9d11.1d9.3d7.8d7.3d7.1d5.7d
Mixed 1.1d1.3d1.0d0.3d0.0d0.0d0.0d0.0d0.0d0.1d0.5d1.0d
Snow 1.4d1.1d0.5d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.1d0.8d
Any 6.3d6.0d8.3d9.9d12.1d11.9d11.1d9.3d7.8d7.3d7.6d7.4d

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. Union County Airport experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year at Union County Airport. The month with the most rain at Union County Airport is May, with an average rainfall of 3.4 inches.

The month with the least rain at Union County Airport is February, with an average rainfall of 1.4 inches.

Average Monthly Rainfall at Union County Airport

Average Monthly Rainfall at Union County AirportJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 inJun 13.5 inJun 13.5 inFeb 61.3 inFeb 61.3 inNov 122.4 inNov 122.4 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 1.5″1.4″2.2″3.0″3.4″3.4″3.1″2.5″2.4″2.3″2.4″2.1″

Snowfall

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

The snowy period of the year lasts for 4.3 months, from November 23 to April 1, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow at Union County Airport is February, with an average snowfall of 3.5 inches.

The snowless period of the year lasts for 7.7 months, from April 1 to November 23. The least snow falls around July 21, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall at Union County Airport

Average Monthly Snowfall at Union County AirportsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 inFeb 43.6 inFeb 43.6 inJul 210.0 inJul 210.0 inNov 231.0 inNov 231.0 inApr 11.0 inApr 11.0 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 3.3″3.5″2.0″0.4″0.0″0.0″0.0″0.0″0.0″0.0″0.6″2.6″

The length of the day at Union County Airport varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 18 minutes of daylight; the longest day is June 20, with 15 hours, 3 minutes of daylight.

Hours of Daylight and Twilight at Union County Airport

Hours of Daylight and Twilight at Union County AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 8 minMar 1912 hr, 8 minMar 1915 hr, 3 minJun 2015 hr, 3 minJun 2012 hr, 11 minSep 2212 hr, 11 minSep 229 hr, 18 minDec 219 hr, 18 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 9.7h10.7h12.0h13.3h14.4h15.0h14.7h13.7h12.4h11.1h9.9h9.4h

The earliest sunrise is at 6:03 AM on June 13, and the latest sunrise is 2 hours, 1 minute later at 8:04 AM on November 2. The earliest sunset is at 5:07 PM on December 7, and the latest sunset is 4 hours, 0 minutes later at 9:07 PM on June 27.

Daylight saving time (DST) is observed at Union County 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 Union County Airport

Sunrise & Sunset with Twilight and Daylight Saving Time at Union County AirportJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 136:03 AMJun 136:03 AM9:07 PMJun 279:07 PMJun 27Dec 75:07 PMDec 75:07 PM8:04 AMNov 28:04 AMNov 2Mar 10DSTMar 10DSTDSTNov 3DSTNov 3daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
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 Union County Airport

Solar Elevation and Azimuth at Union County 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 AM00010101010202020303030404040505060607000010101020202020303040405050602673NowNow
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 Union County 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.

Union County Airport experiences significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.6 months, from May 29 to September 17, during which time the comfort level is muggy, oppressive, or miserable at least 11% of the time. The month with the most muggy days at Union County Airport is July, with 12.6 days that are muggy or worse.

The least muggy day of the year is January 28, when muggy conditions are essentially unheard of.

Humidity Comfort Levels at Union County Airport

Humidity Comfort Levels at Union County AirportmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 280%Jan 280%Jul 2643%Jul 2643%May 2911%May 2911%Sep 1711%Sep 1711%NowNowoppressiveoppressivemuggymuggydrydrycomfortablecomfortablehumidhumid
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 0.0d0.0d0.0d0.0d1.5d7.0d12.6d11.1d3.9d0.3d0.0d0.0d

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 Union County Airport experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 7.1 months, from October 12 to May 16, with average wind speeds of more than 9.5 miles per hour. The windiest month of the year at Union County Airport is January, with an average hourly wind speed of 12.0 miles per hour.

The calmer time of year lasts for 4.9 months, from May 16 to October 12. The calmest month of the year at Union County Airport is August, with an average hourly wind speed of 7.0 miles per hour.

Average Wind Speed at Union County Airport

Average Wind Speed at Union County AirportwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mph18 mph18 mph20 mph20 mphJan 1512.2 mphJan 1512.2 mphAug 36.8 mphAug 36.8 mphOct 129.5 mphOct 129.5 mphMay 169.5 mphMay 169.5 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) 12.011.811.911.39.68.37.27.08.29.710.911.4

The predominant average hourly wind direction at Union County Airport varies throughout the year.

The wind is most often from the south for 1.6 weeks, from May 16 to May 27 and for 2.6 months, from August 31 to November 19, with a peak percentage of 37% on November 13. The wind is most often from the west for 3.1 months, from May 27 to August 31 and for 5.9 months, from November 19 to May 16, with a peak percentage of 40% on July 19.

Wind Direction at Union County Airport

Wind Direction at Union County AirportWSWSWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsouthnortheast
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 Union County 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 time of year to visit Union County Airport for general outdoor tourist activities is from mid June to mid September, with a peak score in the second week of August.

Tourism Score at Union County Airport

Tourism Score at Union County Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.76.70.10.1NowNowtemperaturetemperature 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 Union County Airport for hot-weather activities is from late June to mid August, with a peak score in the third week of July.

Beach/Pool Score at Union County Airport

Beach/Pool Score at Union County Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.45.40.00.0NowNowtemperaturetemperature 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 Union County Airport typically lasts for 5.7 months (175 days), from around April 23 to around October 14, rarely starting before April 4 or after May 10, and rarely ending before September 25 or after November 3.

Time Spent in Various Temperature Bands and the Growing Season at Union County Airport

Time Spent in Various Temperature Bands and the Growing Season at Union County Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Apr 2350%Apr 2350%Oct 1450%Oct 1450%May 1090%May 1090%Sep 2590%Sep 2590%Apr 410%Apr 410%Nov 310%Nov 310%0%Feb 90%Feb 9Jul 18100%Jul 18100%NowNowfrigidfreezingvery coldcoolcomfortablewarmcoldhot
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 Union County Airport should appear around April 5, only rarely appearing before March 21 or after April 18.

Growing Degree Days at Union County Airport

Growing Degree Days at Union County 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°FApr 589°FApr 589°FJun 17900°FJun 17900°FJul 271,800°FJul 271,800°FDec 313,218°FDec 313,218°F
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 extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 4.0 months, from April 29 to August 28, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest month of the year at Union County Airport is July, with an average of 6.7 kWh.

The darker period of the year lasts for 3.2 months, from November 4 to February 12, with an average daily incident shortwave energy per square meter below 2.7 kWh. The darkest month of the year at Union County Airport is December, with an average of 1.7 kWh.

Average Daily Incident Shortwave Solar Energy at Union County Airport

Average Daily Incident Shortwave Solar Energy at Union County AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJul 16.8 kWhJul 16.8 kWhDec 201.7 kWhDec 201.7 kWhApr 295.8 kWhApr 295.8 kWhAug 285.8 kWhAug 285.8 kWhNov 42.7 kWhNov 42.7 kWhFeb 122.7 kWhFeb 122.7 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) 2.02.94.15.36.26.76.76.25.13.62.31.7

For the purposes of this report, the geographical coordinates of Union County Airport are 40.226 deg latitude, -83.351 deg longitude, and 997 ft elevation.

The topography within 2 miles of Union County Airport is essentially flat, with a maximum elevation change of 95 feet and an average elevation above sea level of 994 feet. Within 10 miles is essentially flat (246 feet). Within 50 miles contains only modest variations in elevation (899 feet).

The area within 2 miles of Union County Airport is covered by cropland (65%) and artificial surfaces (35%), within 10 miles by cropland (95%), and within 50 miles by cropland (85%).

This report illustrates the typical weather at Union County 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

Union County 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 Delaware Municipal Airport - Jim Moore Field, Ohio State University Airport, Bolton Field, Marion Municipal Airport, Bellefontaine Regional Airport, Port Columbus International Airport, Rickenbacker International Airport, and Springfield-Beckley Municipal Airport.

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.