September weather in Martinez, CA
The average temperature in Martinez in September is 66.9°F (49.6°F–84.2°F). Average precipitation: 0.06 inches.
September is a fall month in Martinez, and is warmer than the annual average of 58.2°F. Daily temperatures swing about 34.6°F between overnight low and afternoon high. Expect about 1 days with precipitation. Daylight averages about 12h 14m. For travel, September is a comfortable month to visit.
Avg High
84.2°F
Avg Low
49.6°F
Precipitation
0.06 in
Daylight
12h 14m
September records in Martinez
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (1976) | 46.0°F (1973) | 0.00 in (1970) |
| September 2 | 108.0°F (2017) | 42.1°F (2018) | 0.05 in (2000) |
| September 3 | 108.0°F (2017) | 46.0°F (2005) | 0.10 in (2003) |
| September 4 | 102.0°F (2017) | 45.0°F (2005) | 0.00 in (1970) |
| September 5 | 102.0°F (1975) | 45.0°F (2016) | 0.00 in (1970) |
| September 6 | 100.0°F (2004) | 46.0°F (1973) | 0.00 in (1970) |
| September 7 | 102.0°F (1984) | 41.0°F (2018) | 0.18 in (1985) |
| September 8 | 102.9°F (1984) | 45.0°F (2014) | 0.00 in (1970) |
| September 9 | 104.0°F (1984) | 45.0°F (2014) | 0.10 in (1985) |
| September 10 | 100.0°F (2015) | 43.0°F (2005) | 0.13 in (1978) |
| September 11 | 102.0°F (2015) | 44.1°F (2005) | 0.00 in (1970) |
| September 12 | 105.1°F (1979) | 44.1°F (1987) | 0.04 in (2009) |
| September 13 | 107.1°F (1971) | 42.1°F (2016) | 0.00 in (1970) |
| September 14 | 108.0°F (1971) | 42.1°F (1970) | 0.07 in (2009) |
| September 15 | 105.1°F (1971) | 39.9°F (2010) | 0.05 in (1997) |
| September 16 | 104.0°F (1971) | 43.0°F (2018) | 0.10 in (1986) |
| September 17 | 102.9°F (1984) | 42.1°F (2018) | 0.61 in (1989) |
| September 18 | 99.0°F (1984) | 42.1°F (2008) | 0.11 in (1989) |
| September 19 | 102.0°F (2000) | 41.0°F (2018) | 0.52 in (1977) |
| September 20 | 100.0°F (1990) | 42.1°F (1986) | 0.16 in (1973) |
| September 21 | 99.0°F (2015) | 39.9°F (2007) | 0.00 in (1970) |
| September 22 | 100.0°F (2003) | 39.9°F (2017) | 0.80 in (2013) |
| September 23 | 98.1°F (1975) | 39.9°F (2005) | 0.15 in (1990) |
| September 24 | 98.1°F (1975) | 42.1°F (2005) | 0.32 in (1982) |
| September 25 | 98.1°F (1975) | 39.9°F (2005) | 0.34 in (1982) |
| September 26 | 99.0°F (2009) | 42.1°F (2018) | 0.40 in (1972) |
| September 27 | 98.1°F (2016) | 41.0°F (1987) | 0.34 in (1986) |
| September 28 | 100.0°F (2010) | 41.0°F (1986) | 0.73 in (1976) |
| September 29 | 95.0°F (1973) | 42.1°F (2007) | 0.18 in (1989) |
| September 30 | 96.1°F (1980) | 39.9°F (2007) | 0.95 in (1983) |