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Average Weather in Rancho Calaveras California, United States

In Rancho Calaveras, the summers are hot, arid, and mostly clear and the winters are cold, wet, and partly cloudy. Over the course of the year, the temperature typically varies from 40°F to 94°F and is rarely below 33°F or above 102°F.

The hot season lasts for 3.5 months, from June 7 to September 22, with an average daily high temperature above 86°F. The hottest day of the year is July 19, with an average high of 94°F and low of 65°F.

The cool season lasts for 3.1 months, from November 20 to February 23, with an average daily high temperature below 62°F. The coldest day of the year is December 31, with an average low of 40°F and high of 54°F.

Average High and Low Temperature

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 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

Average Hourly Temperature in Rancho Calaveras12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecchillycoldcoolcomfortablewarmhot
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 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.

Clouds

In Rancho Calaveras, 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 in Rancho Calaveras begins around May 15 and lasts for 5.3 months, ending around October 25. On July 29, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 91% of the time, and overcast or mostly cloudy 9% of the time.

The cloudier part of the year begins around October 25 and lasts for 6.7 months, ending around May 15. On February 21, the cloudiest day of the year, the sky is overcast or mostly cloudy 55% of the time, and clear, mostly clear, or partly cloudy 45% of the time.

Cloud Cover

Cloud Cover in Rancho Calaverasclearercloudiercloudier0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecFeb 2155%Feb 2155%Jul 299%Jul 299%May 1532%May 1532%Oct 2532%Oct 2532%overcastmostly cloudymostly clearclear
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.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Rancho Calaveras varies significantly throughout the year.

The wetter season lasts 5.5 months, from November 1 to April 15, with a greater than 16% chance of a given day being a wet day. The chance of a wet day peaks at 31% on February 20.

The drier season lasts 6.5 months, from April 15 to November 1. The smallest chance of a wet day is 0% on July 30.

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 throughout the year is rain alone, with a peak probability of 31% on February 20.

Daily Chance of Precipitation

Daily Chance of Precipitation in Rancho Calaveraswetwetdry0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecFeb 2031%Feb 2031%Jul 300%Jul 300%Jan 126%Jan 126%Nov 116%Nov 116%Apr 1516%Apr 1516%rain
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).

Rainfall

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. Rancho Calaveras experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 8.0 months, from September 28 to May 27, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around February 16, with an average total accumulation of 4.1 inches.

The rainless period of the year lasts for 4.0 months, from May 27 to September 28. The least rain falls around August 3, with an average total accumulation of 0.0 inches.

Average Monthly Rainfall

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.

Sun

The length of the day in Rancho Calaveras varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 31 minutes of daylight; the longest day is June 21, with 14 hours, 49 minutes of daylight.

Hours of Daylight and Twilight

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 earliest sunrise is at 5:39 AM on June 13, and the latest sunrise is 1 hour, 53 minutes later at 7:32 AM on November 4. The earliest sunset is at 4:43 PM on December 6, and the latest sunset is 3 hours, 47 minutes later at 8:30 PM on June 28.

Daylight saving time (DST) is observed in Rancho Calaveras during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time in Rancho Calaveras12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecJun 135:39 AMJun 135:39 AM8:30 PMJun 288:30 PMJun 28Dec 64:43 PMDec 64:43 PM7:32 AMNov 47:32 AMNov 4Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnight
The solar day over the course of the year 2017. 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.

Humidity

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 in Rancho Calaveras, 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

Humidity Comfort Levels in Rancho Calaveras0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecFeb 170%Feb 170%Sep 160%Sep 160%comfortablecomfortabledrydry
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.

Wind

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 Rancho Calaveras does not vary significantly over the course of the year, remaining within 0.4 miles per hour of 2.9 miles per hour throughout.

Average Wind Speed

Average Wind Speed in Rancho Calaveras0.0 mph0.5 mph1.0 mph1.5 mph2.0 mph2.5 mph3.0 mph3.5 mph4.0 mph4.5 mph5.0 mph5.5 mph6.0 mphJanFebMarAprMayJunJulAugSepOctNovDecJun 193.3 mphJun 193.3 mphOct 92.5 mphOct 92.5 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Rancho Calaveras varies throughout the year.

The wind is most often from the south for 1.9 months, from January 22 to March 18 and for 1.8 months, from November 1 to December 25, with a peak percentage of 38% on February 21. The wind is most often from the west for 7.4 months, from March 18 to November 1, with a peak percentage of 79% on July 21. The wind is most often from the east for 4.0 weeks, from December 25 to January 22, with a peak percentage of 34% on January 1.

Wind Direction

Wind Direction in Rancho CalaverasESWS0%20%40%60%80%100%JanFebMarAprMayJunJulAugSepOctNovDecwestsoutheastnorth
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 experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.5 months, from May 8 to August 24, with an average daily incident shortwave energy per square meter above 7.2 kWh. The brightest day of the year is June 26, with an average of 8.5 kWh.

The darker period of the year lasts for 3.6 months, from November 3 to February 20, with an average daily incident shortwave energy per square meter below 3.5 kWh. The darkest day of the year is December 21, with an average of 2.2 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in Rancho Calaverasbrightdarkdark0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWh10 kWhJanFebMarAprMayJunJulAugSepOctNovDecJun 268.5 kWhJun 268.5 kWhDec 212.2 kWhDec 212.2 kWhMay 87.2 kWhMay 87.2 kWhAug 247.2 kWhAug 247.2 kWhNov 33.4 kWhNov 33.4 kWhFeb 203.5 kWhFeb 203.5 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Rancho Calaveras are 38.127 deg latitude, -120.858 deg longitude, and 499 ft elevation.

The topography within 2 miles of Rancho Calaveras contains very significant variations in elevation, with a maximum elevation change of 1,024 feet and an average elevation above sea level of 514 feet. Within 10 miles contains very significant variations in elevation (2,687 feet). Within 50 miles contains large variations in elevation (8,891 feet).

The area within 2 miles of Rancho Calaveras is covered by grassland (98%), within 10 miles by grassland (82%), and within 50 miles by cropland (30%) and grassland (27%).

Data Sources

This report illustrates the typical weather in Rancho Calaveras, 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 Rancho Calaveras.

For each station, the records are corrected for the elevation difference between that station and Rancho Calaveras 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 Rancho Calaveras is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Rancho Calaveras and a given station.

The stations contributing to this reconstruction are: Stockton Metropolitan Airport (50%, 42 kilometers, southwest); Sacramento Mather Airport (29%, 62 kilometers, northwest); Placerville Airport (17%, 66 kilometers, north); and Bridgeport Sonora Junction (4.3%, 120 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.