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Climate and Average Weather Year Round at Mammoth Lakes Airport California, United States

At Mammoth Lakes Airport, the summers are warm, arid, and mostly clear and the winters are freezing, snowy, and partly cloudy. Over the course of the year, the temperature typically varies from 14°F to 81°F and is rarely below 2°F or above 87°F.

Based on the tourism score, the best time of year to visit Mammoth Lakes Airport for warm-weather activities is from late June to mid August.

Climate at Mammoth Lakes Airport

very coldcoldcoolwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow88%88%53%53%clearovercastprecipitation: 3.4 inprecipitation: 3.4 in0.2 in0.2 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 5.4tourism score: 5.40.10.1
Mammoth Lakes Airport weather by month. Click on each chart for more information.

The warm season lasts for 3.2 months, from June 10 to September 15, with an average daily high temperature above 73°F. The hottest month of the year at Mammoth Lakes Airport is July, with an average high of 81°F and low of 45°F.

The cold season lasts for 3.7 months, from November 22 to March 12, with an average daily high temperature below 49°F. The coldest month of the year at Mammoth Lakes Airport is January, with an average low of 15°F and high of 42°F.

Average High and Low Temperature at Mammoth Lakes Airport

Average High and Low Temperature at Mammoth Lakes AirportwarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FDec 2941°FDec 2941°FJul 1881°FJul 1881°F14°F14°F45°F45°FJun 1073°FJun 1073°FSep 1573°FSep 1573°FMar 1249°FMar 1249°F40°F40°F38°F38°F20°F20°F22°F22°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 42°F44°F50°F57°F66°F75°F81°F80°F73°F63°F52°F43°F
Temp. 27°F30°F36°F42°F50°F59°F65°F63°F56°F45°F35°F27°F
Low 15°F18°F23°F28°F34°F41°F45°F43°F37°F29°F21°F15°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 Mammoth Lakes Airport

Average Hourly Temperature at Mammoth Lakes 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 AMNowNowfreezingfreezingfreezingfreezingvery coldvery coldcoldcoolcomfortablewarmcool
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.

Крушево, Macedonia (6,433 miles away); Orta, Turkey (6,754 miles); and Fareydūnshahr, Iran (7,518 miles) are the far-away foreign places with temperatures most similar to Mammoth Lakes Airport (view comparison).

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At Mammoth Lakes 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 Mammoth Lakes Airport begins around May 28 and lasts for 4.9 months, ending around October 24.

The clearest month of the year at Mammoth Lakes Airport is August, during which on average the sky is clear, mostly clear, or partly cloudy 87% of the time.

The cloudier part of the year begins around October 24 and lasts for 7.1 months, ending around May 28.

The cloudiest month of the year at Mammoth Lakes Airport is February, during which on average the sky is overcast or mostly cloudy 46% of the time.

Cloud Cover Categories at Mammoth Lakes Airport

Cloud Cover Categories at Mammoth Lakes AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 788%Aug 788%Mar 153%Mar 153%May 2870%May 2870%Oct 2471%Oct 2471%NowNowclearmostly clearovercastpartly cloudy
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 45%46%44%39%33%20%15%13%15%26%38%43%
Clearer 55%54%56%61%67%80%85%87%85%74%62%57%

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

The wetter season lasts 5.0 months, from November 6 to April 8, with a greater than 16% chance of a given day being a wet day. The month with the most wet days at Mammoth Lakes Airport is February, with an average of 8.0 days with at least 0.04 inches of precipitation.

The drier season lasts 7.0 months, from April 8 to November 6. The month with the fewest wet days at Mammoth Lakes Airport is August, with an average of 1.3 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. Based on this categorization, the most common form of precipitation at Mammoth Lakes Airport changes throughout the year.

Rain alone is the most common for 6.9 months, from April 12 to November 9. The month with the most days of rain alone at Mammoth Lakes Airport is May, with an average of 2.6 days.

Mixed snow and rain is the most common for 5.1 months, from November 9 to April 12. The month with the most days of mixed snow and rain at Mammoth Lakes Airport is February, with an average of 4.3 days.

Daily Chance of Precipitation at Mammoth Lakes Airport

Daily Chance of Precipitation at Mammoth Lakes AirportmixedrainmixedJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 2130%Feb 2130%Jul 13%Jul 13%Apr 1214%Apr 1214%Nov 917%Nov 917%NowNowsnowmixedrain
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 0.6d1.1d1.6d2.0d2.6d1.4d1.3d1.3d1.6d2.2d1.9d0.9d
Mixed 4.1d4.3d4.1d1.9d0.7d0.1d0.0d0.0d0.1d0.8d2.7d3.9d
Snow 2.8d2.6d1.3d0.3d0.1d0.0d0.0d0.0d0.0d0.1d0.7d2.1d
Any 7.5d8.0d7.0d4.3d3.4d1.5d1.3d1.3d1.7d3.1d5.3d6.8d

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. Mammoth Lakes Airport experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.9 months, from September 27 to May 23, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain at Mammoth Lakes Airport is February, with an average rainfall of 1.4 inches.

The rainless period of the year lasts for 4.1 months, from May 23 to September 27. The month with the least rain at Mammoth Lakes Airport is August, with an average rainfall of 0.2 inches.

Average Monthly Rainfall at Mammoth Lakes Airport

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 1.0″1.4″1.2″0.8″0.6″0.3″0.2″0.2″0.3″0.9″1.2″1.2″

Snowfall

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

The snowy period of the year lasts for 6.6 months, from October 19 to May 6, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow at Mammoth Lakes Airport is January, with an average snowfall of 20.8 inches.

The snowless period of the year lasts for 5.4 months, from May 6 to October 19. The least snow falls around August 5, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall at Mammoth Lakes Airport

Average Monthly Snowfall at Mammoth Lakes AirportsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in10 in10 in20 in20 in30 in30 in40 in40 in50 in50 in60 in60 inJan 422.7 inJan 422.7 inAug 50.0 inAug 50.0 inOct 191.0 inOct 191.0 inMay 61.0 inMay 61.0 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 20.8″19.0″10.8″3.4″0.6″0.0″0.0″0.0″0.1″0.8″6.1″18.1″

The length of the day at Mammoth Lakes Airport varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 34 minutes of daylight; the longest day is June 20, with 14 hours, 46 minutes of daylight.

Hours of Daylight and Twilight at Mammoth Lakes Airport

Hours of Daylight and Twilight at Mammoth Lakes AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 8 minMar 1912 hr, 8 minMar 1914 hr, 46 minJun 2014 hr, 46 minJun 2012 hr, 10 minSep 2212 hr, 10 minSep 229 hr, 34 minDec 219 hr, 34 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 9.9h10.8h12.0h13.2h14.2h14.7h14.4h13.5h12.4h11.2h10.1h9.6h

The earliest sunrise is at 5:33 AM on June 12, and the latest sunrise is 1 hour, 49 minutes later at 7:22 AM on November 2. The earliest sunset is at 4:36 PM on December 6, and the latest sunset is 3 hours, 44 minutes later at 8:20 PM on June 27.

Daylight saving time (DST) is observed at Mammoth Lakes 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 Mammoth Lakes Airport

Sunrise & Sunset with Twilight and Daylight Saving Time at Mammoth Lakes AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 125:33 AMJun 125:33 AM8:20 PMJun 278:20 PMJun 27Dec 64:36 PMDec 64:36 PM7:22 AMNov 27:22 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 Mammoth Lakes Airport

Solar Elevation and Azimuth at Mammoth Lakes 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 AM0001010101020202030303040404050506060700001010102020202030304040505060702976NowNow
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 Mammoth Lakes 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.

The perceived humidity level at Mammoth Lakes Airport, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

Humidity Comfort Levels at Mammoth Lakes Airport

Humidity Comfort Levels at Mammoth Lakes AirportJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 290%Jan 290%Jul 170%Jul 170%NowNowdrydry
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 0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d

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 Mammoth Lakes Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 4.7 months, from January 31 to June 21, with average wind speeds of more than 6.9 miles per hour. The windiest month of the year at Mammoth Lakes Airport is April, with an average hourly wind speed of 7.9 miles per hour.

The calmer time of year lasts for 7.3 months, from June 21 to January 31. The calmest month of the year at Mammoth Lakes Airport is August, with an average hourly wind speed of 5.9 miles per hour.

Average Wind Speed at Mammoth Lakes Airport

Average Wind Speed at Mammoth Lakes AirportwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphApr 98.0 mphApr 98.0 mphAug 25.7 mphAug 25.7 mphJan 316.9 mphJan 316.9 mphJun 216.9 mphJun 216.9 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) 6.87.47.87.97.47.06.15.96.06.17.07.1

The predominant average hourly wind direction at Mammoth Lakes Airport is from the west throughout the year.

Wind Direction at Mammoth Lakes Airport

Wind Direction at Mammoth Lakes AirportJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestnortheastsouth
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 Mammoth Lakes 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 Mammoth Lakes Airport for general outdoor tourist activities is from late June to mid August, with a peak score in the third week of July.

Tourism Score at Mammoth Lakes Airport

Tourism Score at Mammoth Lakes Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.45.40.10.1NowNowtemperaturetemperature 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 Mammoth Lakes 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 Mammoth Lakes Airport

Beach/Pool Score at Mammoth Lakes Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810103.23.20.00.0NowNowtemperaturetemperature 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 Mammoth Lakes Airport typically lasts for 2.9 months (89 days), from around June 14 to around September 11, rarely starting before May 26 or after July 8, and rarely ending before August 21 or after October 1.

Time Spent in Various Temperature Bands and the Growing Season at Mammoth Lakes Airport

Time Spent in Various Temperature Bands and the Growing Season at Mammoth Lakes AirportJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jun 1450%Jun 1450%Sep 1150%Sep 1150%Jul 890%Jul 890%Aug 2190%Aug 2190%May 2610%May 2610%Oct 110%Oct 110%0%Nov 250%Nov 25Jul 3199%Jul 3199%NowNowfrigidfreezingvery coldcoldcoolcomfortable
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 Mammoth Lakes Airport should appear around April 26, only rarely appearing before April 7 or after May 18.

Growing Degree Days at Mammoth Lakes Airport

Growing Degree Days at Mammoth Lakes AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°FApr 2690°FApr 2690°FJul 20900°FJul 20900°FOct 51,800°FOct 51,800°FDec 311,921°FDec 311,921°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 3.5 months, from May 3 to August 18, with an average daily incident shortwave energy per square meter above 7.6 kWh. The brightest month of the year at Mammoth Lakes Airport is June, with an average of 8.7 kWh.

The darker period of the year lasts for 3.2 months, from November 2 to February 10, with an average daily incident shortwave energy per square meter below 4.0 kWh. The darkest month of the year at Mammoth Lakes Airport is December, with an average of 2.9 kWh.

Average Daily Incident Shortwave Solar Energy at Mammoth Lakes Airport

Average Daily Incident Shortwave Solar Energy at Mammoth Lakes AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWh10 kWh10 kWhJun 228.8 kWhJun 228.8 kWhDec 222.8 kWhDec 222.8 kWhMay 37.6 kWhMay 37.6 kWhAug 187.6 kWhAug 187.6 kWhNov 24.0 kWhNov 24.0 kWhFeb 104.0 kWhFeb 104.0 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) 3.24.25.77.08.08.78.47.76.54.93.52.9

For the purposes of this report, the geographical coordinates of Mammoth Lakes Airport are 37.624 deg latitude, -118.840 deg longitude, and 7,106 ft elevation.

The topography within 2 miles of Mammoth Lakes Airport contains very significant variations in elevation, with a maximum elevation change of 1,404 feet and an average elevation above sea level of 7,243 feet. Within 10 miles contains very significant variations in elevation (6,473 feet). Within 50 miles also contains extreme variations in elevation (13,235 feet).

The area within 2 miles of Mammoth Lakes Airport is covered by shrubs (100%), within 10 miles by shrubs (65%) and trees (17%), and within 50 miles by shrubs (61%) and trees (26%).

This report illustrates the typical weather at Mammoth Lakes 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

Mammoth Lakes 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 Bishop Airport, Bridgeport Sonora Junction, Fresno Air Terminal Airport, Visalia Municipal Airport, Hanford Municipal Airport, Porterville Municipal Airport, Merced Municipal Airport, and Lemoore Naval Air Station (Reeves Field).

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.