September weather in Monte Sereno, CA
The average temperature in Monte Sereno in September is 68.2°F (53.8°F–82.7°F). Average precipitation: 0.05 inches.
September is a fall month in Monte Sereno, and is warmer than the annual average of 59.6°F. Daily temperatures swing about 28.9°F between overnight low and afternoon high. Expect about 0 days with precipitation. Daylight averages about 12h 13m. For travel, September is a comfortable month to visit.
Avg High
82.7°F
Avg Low
53.8°F
Precipitation
0.05 in
Daylight
12h 13m
September records in Monte Sereno
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 105.1°F (1955) | 45.0°F (1975) | 0.01 in (1941) |
| September 2 | 109.0°F (1955) | 39.9°F (1897) | 0.00 in (1893) |
| September 3 | 107.1°F (1955) | 44.1°F (1970) | 0.07 in (1912) |
| September 4 | 102.9°F (1955) | 42.1°F (1986) | 0.02 in (1912) |
| September 5 | 102.0°F (1961) | 39.9°F (1986) | 0.00 in (1893) |
| September 6 | 102.0°F (1923) | 41.0°F (1946) | 1.50 in (1912) |
| September 7 | 106.0°F (1957) | 39.9°F (1986) | 0.17 in (1925) |
| September 8 | 102.9°F (1984) | 44.1°F (1914) | 0.30 in (1985) |
| September 9 | 106.0°F (1944) | 42.1°F (1931) | 0.09 in (1998) |
| September 10 | 99.0°F (1903) | 44.1°F (1928) | 0.10 in (1895) |
| September 11 | 104.0°F (1979) | 39.9°F (1897) | 0.20 in (1893) |
| September 12 | 105.1°F (1983) | 39.9°F (1978) | 4.35 in (1918) |
| September 13 | 107.1°F (1971) | 42.1°F (1907) | 2.35 in (1918) |
| September 14 | 105.1°F (1971) | 39.9°F (1895) | 0.18 in (1939) |
| September 15 | 105.1°F (1971) | 41.0°F (1970) | 0.07 in (1908) |
| September 16 | 104.0°F (1913) | 41.0°F (1895) | 0.34 in (1989) |
| September 17 | 106.0°F (1913) | 39.9°F (1978) | 0.14 in (1986) |
| September 18 | 100.0°F (1935) | 37.9°F (1978) | 3.61 in (1959) |
| September 19 | 100.9°F (2000) | 39.0°F (1978) | 0.78 in (1977) |
| September 20 | 100.0°F (1939) | 39.9°F (1978) | 0.08 in (1966) |
| September 21 | 105.1°F (1939) | 39.9°F (1978) | 0.27 in (1916) |
| September 22 | 102.0°F (1949) | 42.1°F (1907) | 0.37 in (1923) |
| September 23 | 100.0°F (1939) | 42.1°F (1945) | 4.14 in (1904) |
| September 24 | 100.0°F (1978) | 42.1°F (1907) | 1.00 in (1904) |
| September 25 | 102.9°F (1960) | 39.9°F (1948) | 1.43 in (1898) |
| September 26 | 100.9°F (1963) | 37.9°F (1948) | 0.60 in (1909) |
| September 27 | 100.9°F (1958) | 41.0°F (1948) | 0.40 in (1972) |
| September 28 | 98.1°F (2010) | 43.0°F (1894) | 0.30 in (1976) |
| September 29 | 97.0°F (1946) | 42.1°F (1907) | 0.50 in (1919) |
| September 30 | 95.0°F (1933) | 39.0°F (1950) | 0.78 in (1983) |