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Climate and Average Weather Year Round at Corona Municipal Airport California, United States

At Corona Municipal Airport, the summers are hot, arid, and clear and the winters are long, cool, and partly cloudy. Over the course of the year, the temperature typically varies from 40°F to 90°F and is rarely below 31°F or above 100°F.

Based on the tourism score, the best time of year to visit Corona Municipal Airport for warm-weather activities is from late May to late September.

Climate at Corona Municipal Airport

comfortablewarmhotwarmcomfortableJanFebMarAprMayJunJulAugSepOctNovDecNowNow90%90%56%56%clearovercastprecipitation: 2.9 inprecipitation: 2.9 in0.0 in0.0 inmuggy: 14%muggy: 14%0%0%drydrytourism score: 7.5tourism score: 7.52.52.5
Corona Municipal Airport weather by month. Click on each chart for more information.

The hot season lasts for 3.0 months, from June 26 to September 26, with an average daily high temperature above 86°F. The hottest month of the year at Corona Municipal Airport is August, with an average high of 90°F and low of 59°F.

The cool season lasts for 3.9 months, from November 23 to March 18, with an average daily high temperature below 72°F. The coldest month of the year at Corona Municipal Airport is December, with an average low of 41°F and high of 68°F.

Average High and Low Temperature at Corona Municipal Airport

Average High and Low Temperature at Corona Municipal AirporthotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FDec 2667°FDec 2667°FAug 2290°FAug 2290°F40°F40°F59°F59°FJun 2686°FJun 2686°FSep 2686°FSep 2686°FMar 1872°FMar 1872°F57°F57°F55°F55°F44°F44°F45°F45°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 69°F69°F72°F76°F79°F84°F88°F90°F88°F81°F74°F68°F
Temp. 54°F55°F57°F61°F65°F69°F74°F74°F71°F65°F58°F53°F
Low 41°F44°F45°F48°F53°F56°F60°F59°F57°F52°F46°F41°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 Corona Municipal Airport

Average Hourly Temperature at Corona Municipal 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 AMNowNowcoldcoldcoldcoldcoolcoolcoolcomfortablecomfortablewarmhotvery coldvery cold
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.

Calitzdorp, South Africa (10,123 miles away) is the far-away foreign place with temperatures most similar to Corona Municipal Airport (view comparison).

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At Corona Municipal 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 Corona Municipal Airport begins around April 24 and lasts for 6.3 months, ending around November 3.

The clearest month of the year at Corona Municipal Airport is September, during which on average the sky is clear, mostly clear, or partly cloudy 89% of the time.

The cloudier part of the year begins around November 3 and lasts for 5.7 months, ending around April 24.

The cloudiest month of the year at Corona Municipal Airport is February, during which on average the sky is overcast or mostly cloudy 43% of the time.

Cloud Cover Categories at Corona Municipal Airport

Cloud Cover Categories at Corona Municipal AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Sep 690%Sep 690%Feb 2056%Feb 2056%Apr 2473%Apr 2473%Nov 373%Nov 373%NowNowclearovercastmostly clearpartly 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 39%43%36%28%23%13%12%11%11%20%30%38%
Clearer 61%57%64%72%77%87%88%89%89%80%70%62%

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

The wetter season lasts 4.4 months, from November 21 to April 3, with a greater than 10% chance of a given day being a wet day. The month with the most wet days at Corona Municipal Airport is February, with an average of 5.4 days with at least 0.04 inches of precipitation.

The drier season lasts 7.6 months, from April 3 to November 21. The month with the fewest wet days at Corona Municipal Airport is June, with an average of 0.2 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 Corona Municipal Airport is February, with an average of 5.4 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 20% on February 19.

Daily Chance of Precipitation at Corona Municipal Airport

Daily Chance of Precipitation at Corona Municipal AirportwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 1920%Feb 1920%Jun 240%Jun 240%Nov 2110%Nov 2110%Apr 310%Apr 310%NowNowrain
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 4.9d5.4d4.4d2.3d0.7d0.2d0.4d0.6d0.7d1.7d2.8d4.5d

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. Corona Municipal Airport experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 6.1 months, from October 19 to April 22, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain at Corona Municipal Airport is February, with an average rainfall of 2.9 inches.

The rainless period of the year lasts for 5.9 months, from April 22 to October 19. The month with the least rain at Corona Municipal Airport is June, with an average rainfall of 0.1 inches.

Average Monthly Rainfall at Corona Municipal 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 2.3″2.9″1.8″0.6″0.2″0.1″0.1″0.1″0.2″0.5″0.9″2.0″

The length of the day at Corona Municipal Airport varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 54 minutes of daylight; the longest day is June 20, with 14 hours, 25 minutes of daylight.

Hours of Daylight and Twilight at Corona Municipal Airport

Hours of Daylight and Twilight at Corona Municipal AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 1912 hr, 7 minMar 1914 hr, 25 minJun 2014 hr, 25 minJun 2012 hr, 9 minSep 2212 hr, 9 minSep 229 hr, 54 minDec 219 hr, 54 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 10.2h11.0h12.0h13.1h13.9h14.4h14.1h13.4h12.3h11.3h10.4h9.9h

The earliest sunrise is at 5:38 AM on June 11, and the latest sunrise is 1 hour, 32 minutes later at 7:11 AM on November 2. The earliest sunset is at 4:41 PM on December 4, and the latest sunset is 3 hours, 24 minutes later at 8:05 PM on June 29.

Daylight saving time (DST) is observed at Corona Municipal 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 Corona Municipal Airport

Sunrise & Sunset with Twilight and Daylight Saving Time at Corona Municipal AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 115:38 AMJun 115:38 AM8:05 PMJun 298:05 PMJun 29Dec 44:41 PMDec 44:41 PM7:11 AMNov 27:11 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 Corona Municipal Airport

Solar Elevation and Azimuth at Corona Municipal 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 AM00010101010202020303030404040505060607000010101020202020303030404040505060703380NowNow
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 Corona Municipal 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.

Corona Municipal Airport experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.1 months, from June 24 to September 27, during which time the comfort level is muggy, oppressive, or miserable at least 3% of the time. The month with the most muggy days at Corona Municipal Airport is August, with 3.7 days that are muggy or worse.

The month with the fewest muggy days at Corona Municipal Airport is January, with 0.0 days that are muggy or worse.

Humidity Comfort Levels at Corona Municipal Airport

Humidity Comfort Levels at Corona Municipal AirportmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 220%Jan 220%Aug 414%Aug 414%Jun 243%Jun 243%Sep 273%Sep 273%NowNowmuggymuggyhumidhumidcomfortablecomfortabledrydry
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 0.0d0.0d0.0d0.0d0.2d0.6d3.2d3.7d1.8d0.4d0.0d0.0d

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 Corona Municipal Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.0 months, from November 10 to May 10, with average wind speeds of more than 6.3 miles per hour. The windiest month of the year at Corona Municipal Airport is December, with an average hourly wind speed of 7.2 miles per hour.

The calmer time of year lasts for 6.0 months, from May 10 to November 10. The calmest month of the year at Corona Municipal Airport is September, with an average hourly wind speed of 5.2 miles per hour.

Average Wind Speed at Corona Municipal Airport

Average Wind Speed at Corona Municipal AirportwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mphDec 307.4 mphDec 307.4 mphSep 85.1 mphSep 85.1 mphMay 106.3 mphMay 106.3 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) 7.16.96.56.66.25.95.55.35.25.66.47.2

The predominant average hourly wind direction at Corona Municipal Airport varies throughout the year.

The wind is most often from the west for 5.2 months, from February 10 to July 15 and for 3.6 months, from July 22 to November 10, with a peak percentage of 54% on May 21. The wind is most often from the south for 1.0 weeks, from July 15 to July 22, with a peak percentage of 42% on July 17. The wind is most often from the east for 3.0 months, from November 10 to February 10, with a peak percentage of 35% on January 1.

Wind Direction at Corona Municipal Airport

Wind Direction at Corona Municipal AirportEWWEJanFebMarAprMayJunJulAugSepOctNovDec0%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).

Corona Municipal Airport is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.1 months, from July 5 to October 10, with an average temperature above 67°F. The month of the year at Corona Municipal Airport with the warmest water is August, with an average temperature of 69°F.

The time of year with cooler water lasts for 4.5 months, from December 8 to April 24, with an average temperature below 61°F. The month of the year at Corona Municipal Airport with the coolest water is February, with an average temperature of 59°F.

Average Water Temperature at Corona Municipal Airport

Average Water Temperature at Corona Municipal AirportwarmcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec55°F55°F60°F60°F65°F65°F70°F70°F75°F75°FAug 2269°FAug 2269°F59°FFeb 559°FFeb 5Jul 567°FJul 567°FOct 1067°FOct 1067°FDec 861°FDec 861°FApr 2461°FApr 2461°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 59°F59°F59°F60°F63°F65°F68°F69°F69°F66°F63°F60°F

To characterize how pleasant the weather is at Corona Municipal 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 Corona Municipal Airport for general outdoor tourist activities is from late May to late September, with a peak score in the second week of July.

Tourism Score at Corona Municipal Airport

Tourism Score at Corona Municipal Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.57.52.52.5NowNow 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 Corona Municipal Airport for hot-weather activities is from early July to early September, with a peak score in the last week of July.

Beach/Pool Score at Corona Municipal Airport

Beach/Pool Score at Corona Municipal Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810104.64.60.50.5NowNowtemperaturetemperature 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 Corona Municipal Airport typically lasts for 11 months (327 days), from around January 23 to around December 16, rarely starting after March 12, or ending before November 16.

Time Spent in Various Temperature Bands and the Growing Season at Corona Municipal Airport

Time Spent in Various Temperature Bands and the Growing Season at Corona Municipal Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Jan 2350%Jan 2350%Dec 1650%Dec 1690%Mar 1290%Mar 1290%Nov 1690%Nov 16Jul 19100%Jul 19100%NowNowvery coldcoldcoolcomfortablewarmhotsweltering
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 Corona Municipal Airport should appear around January 14, only rarely appearing before January 10 or after January 21.

Growing Degree Days at Corona Municipal Airport

Growing Degree Days at Corona Municipal AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°FJan 1490°FJan 1490°FApr 21900°FApr 21900°FJun 191,800°FJun 191,800°FDec 314,997°FDec 314,997°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 extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.8 months, from April 24 to August 18, with an average daily incident shortwave energy per square meter above 7.4 kWh. The brightest month of the year at Corona Municipal Airport is June, with an average of 8.5 kWh.

The darker period of the year lasts for 3.2 months, from November 5 to February 12, with an average daily incident shortwave energy per square meter below 4.1 kWh. The darkest month of the year at Corona Municipal Airport is December, with an average of 3.1 kWh.

Average Daily Incident Shortwave Solar Energy at Corona Municipal Airport

Average Daily Incident Shortwave Solar Energy at Corona Municipal AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWh10 kWh10 kWhJun 178.5 kWhJun 178.5 kWhDec 253.0 kWhDec 253.0 kWhApr 247.4 kWhApr 247.4 kWhAug 187.4 kWhAug 187.4 kWhNov 54.1 kWhNov 54.1 kWhFeb 124.1 kWhFeb 124.1 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) 3.34.25.77.18.08.58.27.56.45.03.83.1

For the purposes of this report, the geographical coordinates of Corona Municipal Airport are 33.897 deg latitude, -117.602 deg longitude, and 525 ft elevation.

The topography within 2 miles of Corona Municipal Airport contains only modest variations in elevation, with a maximum elevation change of 305 feet and an average elevation above sea level of 576 feet. Within 10 miles contains only modest variations in elevation (3,658 feet). Within 50 miles also contains extreme variations in elevation (11,503 feet).

The area within 2 miles of Corona Municipal Airport is covered by artificial surfaces (55%), cropland (19%), and shrubs (16%), within 10 miles by shrubs (46%) and artificial surfaces (33%), and within 50 miles by shrubs (47%) and artificial surfaces (22%).

This report illustrates the typical weather at Corona Municipal 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

Corona Municipal 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 Chino Airport, Riverside Municipal Airport, Ontario International Airport, El Toro Mcas, Fob Dwyer, John Wayne Airport-Orange County, March Air Reserve Base, and Fullerton 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.