Average Weather in March in Greenville California, United States
Daily high temperatures increase by 6°F, from 49°F to 55°F, rarely falling below 38°F or exceeding 67°F.
Daily low temperatures increase by 3°F, from 33°F to 36°F, rarely falling below 25°F or exceeding 43°F.
For reference, on August 3, the hottest day of the year, temperatures in Greenville typically range from 57°F to 84°F, while on December 31, the coldest day of the year, they range from 29°F to 42°F.
Average High and Low Temperature in March
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on March. 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 March
The month of March in Greenville experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 62% to 54%. The highest chance of overcast or mostly cloudy conditions is 62% on March 1.
The clearest day of the month is March 31, with clear, mostly clear, or partly cloudy conditions 46% of the time.
For reference, on March 1, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 62%, while on July 30, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 89%.
Cloud Cover Categories in March
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Greenville, the chance of a wet day over the course of March is very rapidly decreasing, starting the month at 37% and ending it at 26%.
For reference, the year's highest daily chance of a wet day is 37% on March 1, and its lowest chance is 1% on August 4.
Over the course of March in Greenville, the chance of a day with only rain decreases from 31% to 22%, the chance of a day with mixed snow and rain remains an essentially constant 4% throughout, and the chance of a day with only snow remains an essentially constant 1% throughout.
Probability of Precipitation in March
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 March in Greenville is very rapidly decreasing, starting the month at 5.3 inches, when it rarely exceeds 10.5 inches or falls below 1.1 inches, and ending the month at 3.1 inches, when it rarely exceeds 6.8 inches or falls below 0.6 inches.
Average Monthly Rainfall in March
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. As with rainfall, we consider the liquid-equivalent snowfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day liquid-equivalent snowfall during March in Greenville is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 0.9 inches or falling below -0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in March
Over the course of March in Greenville, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 20 minutes, implying an average daily increase of 2 minutes, 39 seconds, and weekly increase of 18 minutes, 35 seconds.
The shortest day of the month is March 1, with 11 hours, 19 minutes of daylight and the longest day is March 31, with 12 hours, 38 minutes of daylight.
Hours of Daylight and Twilight in March
The earliest sunrise of the month in Greenville is 6:23 AM on March 10 and the latest sunrise is 58 minutes later at 7:21 AM on March 11.
The earliest sunset is 5:55 PM on March 1 and the latest sunset is 1 hour, 32 minutes later at 7:27 PM on March 31.
Daylight saving time (DST) starts at 3:00 AM on March 11, 2018, shifting sunrise and sunset to be an hour later.
For reference, on June 21, the longest day of the year, the Sun rises at 5:34 AM and sets 15 hours, 2 minutes later, at 8:36 PM, while on December 21, the shortest day of the year, it rises at 7:22 AM and sets 9 hours, 19 minutes later, at 4:41 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in March
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 Greenville is essentially constant during March, remaining around 0% throughout.
Humidity Comfort Levels in March
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 Greenville is essentially constant during March, remaining within 0.1 miles per hour of 5.3 miles per hour throughout.
For reference, on December 18, the windiest day of the year, the daily average wind speed is 5.6 miles per hour, while on August 6, the calmest day of the year, the daily average wind speed is 4.2 miles per hour.
The highest daily average wind speed during March is 5.4 miles per hour on March 18.
Average Wind Speed in March
Wind Direction in March
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 in Greenville typically lasts for 6.1 months (187 days), from around April 25 to around October 29, rarely starting before April 6 or after May 16, and rarely ending before October 8 or after November 17.
The month of March in Greenville is very likely fully outside of the growing season, with the chance that a given day is in the growing season gradually increasing from 0% to 3% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in March
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.
The average accumulated growing degree days in Greenville are essentially constant during March, remaining within 17°F of 29°F throughout.
Growing Degree Days in March
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 Greenville is rapidly increasing during March, rising by 1.7 kWh, from 3.8 kWh to 5.5 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in March
For the purposes of this report, the geographical coordinates of Greenville are 40.140 deg latitude, -120.951 deg longitude, and 4,072 ft elevation.
The topography within 2 miles of Greenville contains very significant variations in elevation, with a maximum elevation change of 1,919 feet and an average elevation above sea level of 3,989 feet. Within 10 miles contains very significant variations in elevation (4,665 feet). Within 50 miles also contains extreme variations in elevation (10,089 feet).
The area within 2 miles of Greenville is covered by trees (57%) and shrubs (37%), within 10 miles by trees (72%) and shrubs (19%), and within 50 miles by trees (63%) and shrubs (30%).
This report illustrates the typical weather in Greenville 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Greenville.
For each station, the records are corrected for the elevation difference between that station and Greenville 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 Greenville is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Greenville and a given station.
The stations contributing to this reconstruction are: Chico Municipal Airport (17%, 86 kilometers, southwest); Oroville Municipal Airport (16%, 92 kilometers, southwest); Blue Canyon-Nyack Airport (27%, 98 kilometers, south); Reno Stead Airport (25%, 106 kilometers, southeast); and Alturas Municipal Airport (15%, 154 kilometers, north).
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.
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.