Average Weather in Forest Ranch California, United States
In Forest Ranch, the summers are hot, dry, and mostly clear and the winters are very cold, wet, and partly cloudy. Over the course of the year, the temperature typically varies from 32°F to 89°F and is rarely below 24°F or above 97°F.
The hot season lasts for 3.5 months, from June 7 to September 22, with an average daily high temperature above 80°F. The hottest day of the year is July 21, with an average high of 89°F and low of 61°F.
The cold season lasts for 3.2 months, from November 19 to February 24, with an average daily high temperature below 55°F. The coldest day of the year is January 1, with an average low of 32°F and high of 47°F.
Average High and Low Temperature
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
In Forest Ranch, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.
The clearer part of the year in Forest Ranch begins around May 27 and lasts for 4.8 months, ending around October 20. On August 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 90% of the time, and overcast or mostly cloudy 10% of the time.
The cloudier part of the year begins around October 20 and lasts for 7.2 months, ending around May 27. On February 26, the cloudiest day of the year, the sky is overcast or mostly cloudy 61% of the time, and clear, mostly clear, or partly cloudy 39% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Forest Ranch varies significantly throughout the year.
The wetter season lasts 6.0 months, from October 26 to April 28, with a greater than 19% chance of a given day being a wet day. The chance of a wet day peaks at 37% on February 28.
The drier season lasts 6.0 months, from April 28 to October 26. The smallest chance of a wet day is 1% on July 25.
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 36% on February 28.
Daily Chance of Precipitation
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. Forest Ranch experiences extreme seasonal variation in monthly rainfall.
The rainy period of the year lasts for 9.2 months, from September 12 to June 19, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around February 17, with an average total accumulation of 6.4 inches.
The rainless period of the year lasts for 2.8 months, from June 19 to September 12. The least rain falls around July 31, with an average total accumulation of 0.1 inches.
Average Monthly Rainfall
The sliding 31-day liquid-equivalent quantity of snowfall in Forest Ranch does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Forest Ranch varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 20 minutes of daylight; the longest day is June 20, with 15 hours, 0 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:37 AM on June 14, and the latest sunrise is 2 hours, 2 minutes later at 7:39 AM on November 4. The earliest sunset is at 4:41 PM on December 6, and the latest sunset is 3 hours, 58 minutes later at 8:39 PM on June 27.
Daylight saving time (DST) is observed in Forest Ranch 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
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 Forest Ranch, 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
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 Forest Ranch experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 4.5 months, from November 15 to March 31, with average wind speeds of more than 7.0 miles per hour. The windiest day of the year is December 18, with an average hourly wind speed of 8.0 miles per hour.
The calmer time of year lasts for 7.5 months, from March 31 to November 15. The calmest day of the year is June 4, with an average hourly wind speed of 6.1 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Forest Ranch varies throughout the year.
The wind is most often from the south for 6.5 months, from February 22 to September 7, with a peak percentage of 51% on July 30. The wind is most often from the east for 5.5 months, from September 7 to February 22, with a peak percentage of 55% on January 1.
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 3.4 months, from May 12 to August 24, with an average daily incident shortwave energy per square meter above 7.1 kWh. The brightest day of the year is July 1, with an average of 8.5 kWh.
The darker period of the year lasts for 3.6 months, from November 2 to February 20, with an average daily incident shortwave energy per square meter below 3.2 kWh. The darkest day of the year is December 20, with an average of 1.9 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Forest Ranch are 39.882 deg latitude, -121.673 deg longitude, and 2,198 ft elevation.
The topography within 2 miles of Forest Ranch contains large variations in elevation, with a maximum elevation change of 2,146 feet and an average elevation above sea level of 2,133 feet. Within 10 miles contains large variations in elevation (4,728 feet). Within 50 miles also contains extreme variations in elevation (10,315 feet).
The area within 2 miles of Forest Ranch is covered by trees (95%), within 10 miles by trees (56%) and shrubs (29%), and within 50 miles by trees (40%) and grassland (27%).
This report illustrates the typical weather in Forest Ranch, 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 is only a single weather station, Chico Municipal Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Forest Ranch.
At a distance of 18 kilometers from Forest Ranch, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.
The station records are corrected for the elevation difference between the station and Forest Ranch according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.
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.