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Average Weather in May in Red Corral California, United States

In Red Corral, the month of May is characterized by rising daily high temperatures, with daily highs increasing by 8°F, from 69°F to 77°F over the course of the month, and rarely exceeding 88°F or dropping below 57°F.

Daily low temperatures increase by 5°F, from 49°F to 54°F, rarely falling below 39°F or exceeding 63°F.

For reference, on July 28, the hottest day of the year, temperatures in Red Corral typically range from 65°F to 89°F, while on December 23, the coldest day of the year, they range from 39°F to 53°F.

Average High and Low Temperature in May

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.

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

Average Hourly Temperature in May

Average Hourly Temperature in May in Red Corral18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM4 AM8 AM12 PM4 PM8 PM12 AMAprJuncoldcoolwarmcomfortablevery cold
The average hourly temperature, color coded into bands: 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 shaded overlays indicate night and civil twilight.


The month of May in Red Corral experiences rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 41% to 29%.

The clearest day of the month is May 31, with clear, mostly clear, or partly cloudy conditions 71% of the time.

For reference, on February 21, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 58%, while on July 29, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 90%.

Cloud Cover Categories in May

Cloud Cover Categories in May in Red Corral1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AprJunMay 159%May 159%May 3171%May 3171%May 1162%May 1162%May 2166%May 2166%clearmostly cloudyovercastmostly clearpartly cloudy
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.


A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Red Corral, the chance of a wet day over the course of May is rapidly decreasing, starting the month at 15% and ending it at 9%.

For reference, the year's highest daily chance of a wet day is 34% on February 21, and its lowest chance is 1% on August 1.

Probability of Precipitation in May

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).


To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during May in Red Corral is decreasing, starting the month at 1.5 inches, when it rarely exceeds 3.4 inches or falls below 0.1 inches, and ending the month at 0.7 inches, when it rarely exceeds 2.0 inches.

Average Monthly Rainfall in May

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 liquid-equivalent snowfall.


Over the course of May in Red Corral, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 50 minutes, implying an average daily increase of 1 minute, 40 seconds, and weekly increase of 11 minutes, 41 seconds.

The shortest day of the month is May 1, with 13 hours, 49 minutes of daylight and the longest day is May 31, with 14 hours, 39 minutes of daylight.

Hours of Daylight and Twilight in May

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.

The latest sunrise of the month in Red Corral is 6:05 AM on May 1 and the earliest sunrise is 24 minutes earlier at 5:40 AM on May 31.

The earliest sunset is 7:54 PM on May 1 and the latest sunset is 26 minutes later at 8:20 PM on May 31.

Daylight saving time is observed in Red Corral during 2017, but it neither starts nor ends during May, so the entire month is in daylight saving time.

For reference, on June 21, the longest day of the year, the Sun rises at 5:38 AM and sets 14 hours, 51 minutes later, at 8:29 PM, while on December 21, the shortest day of the year, it rises at 7:16 AM and sets 9 hours, 29 minutes later, at 4:45 PM.

Sunrise & Sunset with Twilight in May

The solar day over the course of May. 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.


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 chance that a given day will be muggy in Red Corral is essentially constant during May, remaining around 0% throughout.

For reference, on September 10, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in May

The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.


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 in Red Corral is essentially constant during May, remaining within 0.1 miles per hour of 5.5 miles per hour throughout.

For reference, on December 24, the windiest day of the year, the daily average wind speed is 6.4 miles per hour, while on September 24, the calmest day of the year, the daily average wind speed is 5.4 miles per hour.

The lowest daily average wind speed during May is 5.5 miles per hour on May 20.

Average Wind Speed in May

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The hourly average wind direction in Red Corral throughout May is predominantly from the west, with a peak proportion of 45% on May 31.

Wind Direction in May

Wind Direction in May in Red CorralSW1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AprJuneastwestsouthnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Solar Energy

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 in Red Corral is increasing during May, rising by 1.0 kWh, from 6.9 kWh to 7.9 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in May

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.


For the purposes of this report, the geographical coordinates of Red Corral are 38.412 deg latitude, -120.606 deg longitude, and 2,487 ft elevation.

The topography within 2 miles of Red Corral contains large variations in elevation, with a maximum elevation change of 2,142 feet and an average elevation above sea level of 2,523 feet. Within 10 miles contains large variations in elevation (3,901 feet). Within 50 miles also contains extreme variations in elevation (10,850 feet).

The area within 2 miles of Red Corral is covered by shrubs (61%) and trees (39%), within 10 miles by trees (52%) and shrubs (40%), and within 50 miles by trees (34%) and shrubs (24%).

Data Sources

This report illustrates the typical weather in Red Corral year round, 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

There are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Red Corral.

For each station, the records are corrected for the elevation difference between that station and Red Corral according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Red Corral is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Red Corral and a given station.

The stations contributing to this reconstruction are: Placerville Airport (70%, 36 kilometers, north); Lake Tahoe Airport (9%, 76 kilometers, northeast); Stockton Metropolitan Airport (13%, 80 kilometers, southwest); and Bridgeport Sonora Junction (7%, 95 kilometers, east).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , 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 aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.


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.