Average Weather in May in Barstow California, United States
Daily high temperatures increase by 9°F, from 83°F to 91°F, rarely falling below 71°F or exceeding 102°F.
Daily low temperatures increase by 8°F, from 54°F to 62°F, rarely falling below 46°F or exceeding 70°F.
For reference, on July 21, the hottest day of the year, temperatures in Barstow typically range from 73°F to 102°F, while on December 30, the coldest day of the year, they range from 35°F to 58°F.
Average High and Low Temperature in May
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on May. 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 May
Laghouat, Algeria (6,310 miles away); Turaif, Saudi Arabia (7,582 miles); and Fīrūzābād, Iran (7,989 miles) are the far-away foreign places with temperatures most similar to Barstow (view comparison).
The month of May in Barstow experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 24% to 19%.
The clearest day of the month is May 31, with clear, mostly clear, or partly cloudy conditions 81% of the time.
For reference, on February 19, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 41%, 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 May
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Barstow, the chance of a wet day over the course of May is essentially constant, remaining around 2% throughout.
For reference, the year's highest daily chance of a wet day is 14% on February 21, and its lowest chance is 1% on June 14.
Probability of Precipitation in May
The average sliding 31-day rainfall during May in Barstow is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.4 inches or falling below -0.0 inches.
Average Monthly Rainfall in May
Over the course of May in Barstow, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 44 minutes, implying an average daily increase of 1 minute, 28 seconds, and weekly increase of 10 minutes, 16 seconds.
The shortest day of the month is May 1, with 13 hours, 36 minutes of daylight and the longest day is May 31, with 14 hours, 20 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in Barstow is 5:57 AM on May 1 and the earliest sunrise is 21 minutes earlier at 5:35 AM on May 31.
The earliest sunset is 7:33 PM on May 1 and the latest sunset is 23 minutes later at 7:56 PM on May 31.
Daylight saving time is observed in Barstow during 2018, but it neither starts nor ends during May, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:34 AM and sets 14 hours, 30 minutes later, at 8:05 PM, while on December 21, the shortest day of the year, it rises at 6:51 AM and sets 9 hours, 49 minutes later, at 4:40 PM.
Sunrise & Sunset with Twilight in May
The chance that a given day will be muggy in Barstow is essentially constant during May, remaining around 0% throughout.
For reference, on August 22, the muggiest day of the year, there are muggy conditions 1% 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 May
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Barstow is essentially constant during May, remaining within 0.1 miles per hour of 11.0 miles per hour throughout.
For reference, on June 10, the windiest day of the year, the daily average wind speed is 11.1 miles per hour, while on January 9, the calmest day of the year, the daily average wind speed is 7.6 miles per hour.
Average Wind Speed in May
Wind Direction in May
The growing season in Barstow typically lasts for 9.1 months (275 days), from around February 23 to around November 25, rarely starting before January 19 or after March 21, and rarely ending before November 8 or after December 15.
The month of May in Barstow is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in May
The average accumulated growing degree days in Barstow are rapidly increasing during May, increasing by 631°F, from 884°F to 1,516°F, over the course of the month.
Growing Degree Days in May
The average daily incident shortwave solar energy in Barstow is gradually increasing during May, rising by 0.7 kWh, from 7.9 kWh to 8.6 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in May
For the purposes of this report, the geographical coordinates of Barstow are 34.899 deg latitude, -117.023 deg longitude, and 2,247 ft elevation.
The topography within 2 miles of Barstow contains significant variations in elevation, with a maximum elevation change of 495 feet and an average elevation above sea level of 2,208 feet. Within 10 miles contains significant variations in elevation (2,096 feet). Within 50 miles contains large variations in elevation (8,894 feet).
The area within 2 miles of Barstow is covered by shrubs (87%), within 10 miles by shrubs (96%), and within 50 miles by shrubs (91%).
This report illustrates the typical weather in Barstow 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Barstow.
For each station, the records are corrected for the elevation difference between that station and Barstow 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 Barstow is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Barstow and a given station.
The stations contributing to this reconstruction are: Barstow Daggett County Airport (62%, 22 kilometers, east); Southern California Logistics Airport (20%, 48 kilometers, southwest); Edwards, Edwards Air Force Auxiliary North Base (11%, 77 kilometers, west); and Ridgecrest Community Hospital Heliport (7%, 107 kilometers, northwest).
Time zones for aiports and weather stations are provided by AskGeo.com .