Average Weather in March in San Bernardino California, United States
Daily high temperatures increase by 4°F, from 69°F to 74°F, rarely falling below 58°F or exceeding 85°F.
Daily low temperatures increase by 2°F, from 45°F to 47°F, rarely falling below 37°F or exceeding 54°F.
For reference, on August 20, the hottest day of the year, temperatures in San Bernardino typically range from 64°F to 96°F, while on January 23, the coldest day of the year, they range from 42°F to 67°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 San Bernardino experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 43% to 32%.
The clearest day of the month is March 29, with clear, mostly clear, or partly cloudy conditions 68% of the time.
For reference, on February 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 46%, while on September 7, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 90%.
Cloud Cover Categories in March
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In San Bernardino, the chance of a wet day over the course of March is rapidly decreasing, starting the month at 18% and ending it at 10%.
For reference, the year's highest daily chance of a wet day is 19% on February 20, and its lowest chance is 1% on June 20.
Probability of Precipitation in March
The average sliding 31-day rainfall during March in San Bernardino is rapidly decreasing, starting the month at 2.1 inches, when it rarely exceeds 4.8 inches or falls below 0.2 inches, and ending the month at 0.8 inches, when it rarely exceeds 2.3 inches.
Average Monthly Rainfall in March
Over the course of March in San Bernardino, 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, 4 minutes, implying an average daily increase of 2 minutes, 8 seconds, and weekly increase of 14 minutes, 55 seconds.
The shortest day of the month is March 1, with 11 hours, 28 minutes of daylight and the longest day is March 31, with 12 hours, 32 minutes of daylight.
Hours of Daylight and Twilight in March
The earliest sunrise of the month in San Bernardino is 6:06 AM on March 10 and the latest sunrise is 59 minutes later at 7:04 AM on March 11.
The earliest sunset is 5:45 PM on March 1 and the latest sunset is 1 hour, 24 minutes later at 7:09 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 5:38 AM and sets 14 hours, 26 minutes later, at 8:03 PM, while on December 21, the shortest day of the year, it rises at 6:50 AM and sets 9 hours, 53 minutes later, at 4:43 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in March
The chance that a given day will be muggy in San Bernardino is essentially constant during March, remaining around 0% throughout.
For reference, on July 31, the muggiest day of the year, there are muggy conditions 5% 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 San Bernardino is essentially constant during March, remaining within 0.1 miles per hour of 6.8 miles per hour throughout.
For reference, on December 31, the windiest day of the year, the daily average wind speed is 7.2 miles per hour, while on September 8, the calmest day of the year, the daily average wind speed is 5.2 miles per hour.
The lowest daily average wind speed during March is 6.7 miles per hour on March 9.
Average Wind Speed in March
Wind Direction in March
San Bernardino is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in San Bernardino is essentially constant during March, remaining around 59°F throughout.
Average Water Temperature in March
While it does not do so every year, freezing temperatures are seen in San Bernardino over some winters. The day least likely to be in the growing season is January 6, with a 58% chance.
Time Spent in Various Temperature Bands and the Growing Season in March
The average accumulated growing degree days in San Bernardino are increasing during March, increasing by 266°F, from 365°F to 631°F, over the course of the month.
Growing Degree Days in March
The average daily incident shortwave solar energy in San Bernardino is rapidly increasing during March, rising by 1.6 kWh, from 4.9 kWh to 6.5 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 San Bernardino are 34.108 deg latitude, -117.290 deg longitude, and 1,083 ft elevation.
The topography within 2 miles of San Bernardino contains only modest variations in elevation, with a maximum elevation change of 190 feet and an average elevation above sea level of 1,068 feet. Within 10 miles contains only modest variations in elevation (5,358 feet). Within 50 miles also contains extreme variations in elevation (11,490 feet).
The area within 2 miles of San Bernardino is covered by artificial surfaces (54%) and shrubs (46%), within 10 miles by shrubs (68%) and artificial surfaces (24%), and within 50 miles by shrubs (69%) and artificial surfaces (15%).
This report illustrates the typical weather in San Bernardino 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in San Bernardino.
For each station, the records are corrected for the elevation difference between that station and San Bernardino 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 San Bernardino is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Bernardino and a given station.
The stations contributing to this reconstruction are: San Bernardino International Airport (88%, 5.3 kilometers, east); Riverside Municipal Airport (10%, 22 kilometers, southwest); and Southern California Logistics Airport (1.8%, 54 kilometers, north).
Time zones for aiports and weather stations are provided by AskGeo.com .