August weather in Barstow, CA
The average temperature in Barstow in August is 85.7°F (70.4°F–101.0°F). Average precipitation: 0.17 inches.
August is a summer month in Barstow, and is warmer than the annual average of 65.7°F. Daily temperatures swing about 30.6°F between overnight low and afternoon high. Expect about 1 days with precipitation. Daylight averages about 13h 19m. For travel, August is hot.
Avg High
101.0°F
Avg Low
70.4°F
Precipitation
0.17 in
Daylight
13h 19m
August records in Barstow
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 109.9°F (2020) | 55.0°F (1985) | 0.22 in (1984) |
| August 2 | 109.9°F (1993) | 57.0°F (1986) | 0.48 in (2011) |
| August 3 | 108.0°F (1995) | 57.9°F (1989) | 0.02 in (2014) |
| August 4 | 109.9°F (2021) | 57.0°F (1989) | 0.76 in (2014) |
| August 5 | 111.9°F (2021) | 55.0°F (1989) | 0.05 in (2022) |
| August 6 | 111.0°F (1998) | 55.0°F (1982) | 0.00 in (1980) |
| August 7 | 109.9°F (1981) | 57.9°F (1988) | 0.30 in (1983) |
| August 8 | 111.9°F (1997) | 57.9°F (1999) | 0.22 in (1989) |
| August 9 | 109.9°F (1981) | 61.0°F (1999) | 0.45 in (2022) |
| August 10 | 109.0°F (2004) | 60.1°F (1999) | 0.07 in (1983) |
| August 11 | 109.0°F (2012) | 54.0°F (1983) | 0.80 in (1989) |
| August 12 | 109.0°F (2002) | 59.0°F (1985) | 0.11 in (2004) |
| August 13 | 109.9°F (2002) | 57.0°F (1985) | 0.00 in (1980) |
| August 14 | 109.9°F (2002) | 57.9°F (1988) | 0.17 in (1990) |
| August 15 | 111.0°F (2002) | 55.9°F (1987) | 0.46 in (1998) |
| August 16 | 108.0°F (1994) | 55.9°F (1987) | 0.00 in (1980) |
| August 17 | 111.0°F (2020) | 55.0°F (1983) | 0.30 in (2000) |
| August 18 | 111.9°F (2020) | 57.9°F (1987) | 0.66 in (1984) |
| August 19 | 109.9°F (2020) | 55.9°F (1985) | 0.21 in (1983) |
| August 20 | 109.9°F (2020) | 60.1°F (1980) | 0.60 in (2023) |
| August 21 | 109.9°F (2020) | 57.0°F (1985) | 1.36 in (2023) |
| August 22 | 109.0°F (2020) | 57.0°F (1989) | 0.04 in (1996) |
| August 23 | 108.0°F (2025) | 53.1°F (1986) | 0.02 in (1988) |
| August 24 | 108.0°F (1991) | 55.9°F (1990) | 0.32 in (1988) |
| August 25 | 107.1°F (2011) | 51.1°F (1987) | 0.04 in (2003) |
| August 26 | 109.0°F (1985) | 55.0°F (1990) | 0.15 in (1984) |
| August 27 | 107.1°F (2001) | 55.9°F (1990) | 1.01 in (2010) |
| August 28 | 108.0°F (2017) | 59.0°F (1991) | 0.00 in (1980) |
| August 29 | 108.0°F (1998) | 57.9°F (1991) | 0.00 in (1980) |
| August 30 | 109.0°F (1984) | 55.9°F (2000) | 0.43 in (1988) |
| August 31 | 108.0°F (1996) | 53.1°F (2000) | 0.01 in (1998) |