Barstow Weather in May
Average highs run from 81°F on May 1 to 91°F on May 31, and lows from 53°F to 61°F. Normal precipitation for the month is 0.06 in over about 1 wet days.
May day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 86°F
- Average low
- 57°F
- Precipitation
- 0.06 in
- Record high
- 111°FMay 28, 2003
- Record low
- 40°FMay 8, 1950
- Chance of a freeze
- 0%
- Days of 90°F or more
- 12.4
- Daylight
- 13 h 37 min to 14 h 20 min
- Cloud cover
- 28%
- Humidity
- 36%
- Dew point
- 35°F
- Wind
- 11.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| May 1 | 81°F | 53°F | 100°F 1947 | 43°F 1955 | 3% | 0% |
| May 2 | 81°F | 53°F | 104°F 1947 | 42°F 1953 | 3% | 0% |
| May 3 | 81°F | 54°F | 106°F 1947 | 42°F 1953 | 3% | 0% |
| May 4 | 82°F | 54°F | 105°F 1947 | 42°F 1944 | 3% | 0% |
| May 5 | 82°F | 54°F | 103°F 1947 | 44°F 1950 | 3% | 0% |
| May 6 | 82°F | 55°F | 103°F 1989 | 44°F 1964 | 3% | 0% |
| May 7 | 83°F | 55°F | 104°F 1989 | 44°F 1964 | 3% | 0% |
| May 8 | 83°F | 55°F | 101°F 1974 | 40°F 1950 | 3% | 0% |
| May 9 | 83°F | 55°F | 104°F 2018 | 44°F 1948 | 3% | 0% |
| May 10 | 84°F | 56°F | 103°F 2026 | 44°F 1949 | 3% | 0% |
| May 11 | 84°F | 56°F | 105°F 1960 | 46°F 2010 | 3% | 0% |
| May 12 | 84°F | 56°F | 106°F 1996 | 42°F 1953 | 3% | 0% |
| May 13 | 85°F | 56°F | 103°F 2013 | 40°F 1998 | 3% | 0% |
| May 14 | 85°F | 56°F | 103°F 1976 | 44°F 1951 | 3% | 0% |
| May 15 | 85°F | 57°F | 100°F 1997 | 45°F 1955 | 3% | 0% |
| May 16 | 86°F | 57°F | 102°F 2009 | 45°F 1944 | 3% | 0% |
| May 17 | 86°F | 57°F | 105°F 2009 | 43°F 1962 | 2% | 0% |
| May 18 | 86°F | 57°F | 107°F 2008 | 46°F 1991 | 2% | 0% |
| May 19 | 87°F | 58°F | 108°F 2008 | 45°F 1944 | 2% | 0% |
| May 20 | 87°F | 58°F | 104°F 2008 | 42°F 1948 | 2% | 0% |
| May 21 | 87°F | 58°F | 106°F 2012 | 47°F 1972 | 2% | 0% |
| May 22 | 88°F | 58°F | 108°F 2000 | 48°F 1948 | 2% | 0% |
| May 23 | 88°F | 59°F | 108°F 2000 | 47°F 1959 | 2% | 0% |
| May 24 | 88°F | 59°F | 106°F 2001 | 47°F 1953 | 2% | 0% |
| May 25 | 89°F | 59°F | 104°F 1951 | 44°F 1953 | 2% | 0% |
| May 26 | 89°F | 59°F | 110°F 1951 | 46°F 1953 | 2% | 0% |
| May 27 | 90°F | 60°F | 109°F 2020 | 45°F 1953 | 2% | 0% |
| May 28 | 90°F | 60°F | 111°F 2003 | 46°F 1953 | 2% | 0% |
| May 29 | 90°F | 60°F | 110°F 1984 | 44°F 1953 | 2% | 0% |
| May 30 | 91°F | 60°F | 106°F 1997 | 49°F 2011 | 2% | 0% |
| May 31 | 91°F | 61°F | 106°F 2001 | 49°F 1988 | 2% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- May 1
- sunrise 5:57 AM, sunset 7:34 PM
- May 31
- sunrise 5:36 AM, sunset 7:56 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00040521 (Barstow), public domain. Records: NOAA GHCN-Daily, station USW00023161, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.