May weather in Barstow, CA
The average temperature in Barstow in May is 71.3°F (56.9°F–85.7°F). Average precipitation: 0.06 inches.
May is a spring month in Barstow, and is warmer than the annual average of 65.7°F. Daily temperatures swing about 28.8°F between overnight low and afternoon high. Expect about 1 days with precipitation. Daylight averages about 13h 50m. For travel, May is a comfortable month to visit.
Avg High
85.7°F
Avg Low
56.9°F
Precipitation
0.06 in
Daylight
13h 50m
May records in Barstow
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 98.1°F (2021) | 36.0°F (1988) | 0.10 in (1980) |
| May 2 | 98.1°F (1981) | 39.0°F (1988) | 0.47 in (2018) |
| May 3 | 100.0°F (1995) | 41.0°F (2023) | 0.01 in (2003) |
| May 4 | 98.1°F (2004) | 42.1°F (1986) | 0.06 in (1982) |
| May 5 | 99.0°F (1989) | 36.0°F (1986) | 0.40 in (2025) |
| May 6 | 98.1°F (1989) | 36.0°F (1986) | 0.11 in (2005) |
| May 7 | 99.0°F (1989) | 33.1°F (1988) | 0.32 in (1987) |
| May 8 | 98.1°F (1989) | 39.9°F (1991) | 0.07 in (1987) |
| May 9 | 98.1°F (2020) | 42.1°F (1988) | 0.00 in (1980) |
| May 10 | 100.0°F (2018) | 32.0°F (1980) | 0.04 in (1980) |
| May 11 | 100.9°F (1996) | 33.1°F (1980) | 0.10 in (1982) |
| May 12 | 98.1°F (2006) | 42.1°F (1995) | 0.24 in (1987) |
| May 13 | 102.0°F (1996) | 45.0°F (2000) | 0.10 in (1998) |
| May 14 | 100.0°F (1997) | 41.0°F (1998) | 0.10 in (1987) |
| May 15 | 97.0°F (2006) | 39.0°F (1984) | 0.05 in (1987) |
| May 16 | 99.0°F (2009) | 37.9°F (1984) | 0.30 in (1987) |
| May 17 | 100.9°F (2006) | 45.0°F (1981) | 0.00 in (1980) |
| May 18 | 104.0°F (2008) | 41.0°F (1991) | 0.04 in (2009) |
| May 19 | 105.1°F (2008) | 45.0°F (1991) | 0.00 in (1980) |
| May 20 | 100.0°F (2008) | 39.9°F (1991) | 0.01 in (2019) |
| May 21 | 98.1°F (1988) | 45.0°F (1987) | 0.00 in (1980) |
| May 22 | 100.9°F (1984) | 45.0°F (2021) | 0.35 in (2014) |
| May 23 | 100.9°F (2005) | 44.1°F (2010) | 0.45 in (2023) |
| May 24 | 104.0°F (2000) | 42.1°F (1980) | 0.00 in (1980) |
| May 25 | 100.0°F (1983) | 41.0°F (1980) | 0.06 in (1987) |
| May 26 | 100.9°F (1986) | 43.0°F (1987) | 0.08 in (2016) |
| May 27 | 102.9°F (1983) | 42.1°F (1988) | 0.11 in (1981) |
| May 28 | 107.1°F (2003) | 45.0°F (2019) | 0.00 in (1980) |
| May 29 | 106.0°F (2003) | 45.0°F (1987) | 0.00 in (1980) |
| May 30 | 104.0°F (1997) | 37.9°F (1988) | 0.00 in (1980) |
| May 31 | 104.0°F (2000) | 39.9°F (1988) | 0.00 in (1980) |