Average Weather in March in Jamestown California, United States
Daily high temperatures increase by 6°F, from 60°F to 65°F, rarely falling below 51°F or exceeding 76°F.
Daily low temperatures increase by 3°F, from 42°F to 44°F, rarely falling below 34°F or exceeding 51°F.
For reference, on July 18, the hottest day of the year, temperatures in Jamestown typically range from 64°F to 91°F, while on December 30, the coldest day of the year, they range from 38°F to 52°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 Jamestown experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 55% to 47%.
The clearest day of the month is March 31, with clear, mostly clear, or partly cloudy conditions 53% of the time.
For reference, on February 21, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 55%, while on July 29, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 91%.
Cloud Cover Categories in March
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Jamestown, the chance of a wet day over the course of March is very rapidly decreasing, starting the month at 30% and ending it at 21%.
For reference, the year's highest daily chance of a wet day is 31% on February 20, and its lowest chance is 0% on August 19.
Probability of Precipitation in March
The average sliding 31-day rainfall during March in Jamestown is rapidly decreasing, starting the month at 4.1 inches, when it rarely exceeds 8.0 inches or falls below 0.9 inches, and ending the month at 2.4 inches, when it rarely exceeds 5.7 inches or falls below 0.2 inches.
Average Monthly Rainfall in March
Over the course of March in Jamestown, 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, 14 minutes, implying an average daily increase of 2 minutes, 27 seconds, and weekly increase of 17 minutes, 11 seconds.
The shortest day of the month is March 1, with 11 hours, 22 minutes of daylight and the longest day is March 31, with 12 hours, 36 minutes of daylight.
Hours of Daylight and Twilight in March
The earliest sunrise of the month in Jamestown is 6:20 AM on March 10 and the latest sunrise is 59 minutes later at 7:18 AM on March 11.
The earliest sunset is 5:55 PM on March 1 and the latest sunset is 1 hour, 29 minutes later at 7:23 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 5:39 AM and sets 14 hours, 48 minutes later, at 8:27 PM, while on December 21, the shortest day of the year, it rises at 7:14 AM and sets 9 hours, 32 minutes later, at 4:45 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in March
The chance that a given day will be muggy in Jamestown is essentially constant during March, 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 March
The average hourly wind speed in Jamestown is essentially constant during March, remaining within 0.2 miles per hour of 5.4 miles per hour throughout.
For reference, on February 20, the windiest day of the year, the daily average wind speed is 5.7 miles per hour, while on September 18, the calmest day of the year, the daily average wind speed is 4.8 miles per hour.
The lowest daily average wind speed during March is 5.2 miles per hour on March 26.
Average Wind Speed in March
Wind Direction in March
The growing season in Jamestown typically lasts for 9.3 months (279 days), from around February 27 to around December 3, rarely starting after April 2, or ending before November 11.
The month of March in Jamestown is more likely than not fully within the growing season, with the chance that a given day is in the growing season rapidly increasing from 52% to 88% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in March
The average accumulated growing degree days in Jamestown are gradually increasing during March, increasing by 134°F, from 93°F to 228°F, over the course of the month.
Growing Degree Days in March
The average daily incident shortwave solar energy in Jamestown is rapidly increasing during March, rising by 1.6 kWh, from 4.0 kWh to 5.6 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 Jamestown are 37.953 deg latitude, -120.423 deg longitude, and 1,552 ft elevation.
The topography within 2 miles of Jamestown contains very significant variations in elevation, with a maximum elevation change of 899 feet and an average elevation above sea level of 1,585 feet. Within 10 miles contains very significant variations in elevation (3,632 feet). Within 50 miles also contains extreme variations in elevation (11,568 feet).
The area within 2 miles of Jamestown is covered by shrubs (57%) and grassland (43%), within 10 miles by shrubs (45%) and grassland (40%), and within 50 miles by grassland (26%) and trees (25%).
This report illustrates the typical weather in Jamestown 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 6 weather stations near enough to contribute to our estimation of the temperature and dew point in Jamestown.
For each station, the records are corrected for the elevation difference between that station and Jamestown 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 Jamestown is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Jamestown and a given station.
The stations contributing to this reconstruction are: Modesto City-County Airport (27%, 59 kilometers, southwest); Castle Airport (26%, 65 kilometers, south); Placerville Airport (19%, 90 kilometers, north); Bridgeport Sonora Junction (7%, 91 kilometers, northeast); Sacramento Mather Airport (15%, 103 kilometers, northwest); and Lake Tahoe Airport (7%, 112 kilometers, north).
Time zones for aiports and weather stations are provided by AskGeo.com .