September weather in East Palo Alto, CA
The average temperature in East Palo Alto in September is 66.3°F (53.0°F–79.6°F). Average precipitation: 0.07 inches.
September is a fall month in East Palo Alto, and is warmer than the annual average of 58.5°F. Daily temperatures swing about 26.6°F between overnight low and afternoon high. Expect about 1 days with precipitation. Daylight averages about 12h 14m. For travel, September is one of the best months of the year to visit.
Avg High
79.6°F
Avg Low
53.0°F
Precipitation
0.07 in
Daylight
12h 14m
September records in East Palo Alto
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.9°F (2005) | 48.0°F (1964) | 0.00 in (1953) |
| September 2 | 105.1°F (2017) | 46.0°F (1964) | 0.00 in (1953) |
| September 3 | 104.0°F (2017) | 45.0°F (1964) | 0.00 in (1953) |
| September 4 | 95.0°F (2008) | 43.0°F (1954) | 0.00 in (1953) |
| September 5 | 97.0°F (2008) | 45.0°F (1954) | 0.00 in (1953) |
| September 6 | 98.1°F (2008) | 46.9°F (1960) | 0.00 in (1953) |
| September 7 | 100.0°F (1958) | 46.9°F (1960) | 0.03 in (1969) |
| September 8 | 99.0°F (1957) | 46.0°F (1978) | 0.02 in (1958) |
| September 9 | 98.1°F (1976) | 39.0°F (2011) | 0.15 in (1985) |
| September 10 | 97.0°F (2015) | 46.0°F (1964) | 0.04 in (1978) |
| September 11 | 95.0°F (1984) | 39.9°F (2012) | 0.00 in (1953) |
| September 12 | 102.9°F (1979) | 45.0°F (1993) | 0.13 in (2017) |
| September 13 | 100.9°F (1979) | 37.0°F (2012) | 0.17 in (1963) |
| September 14 | 102.9°F (1971) | 42.1°F (1970) | 0.00 in (1953) |
| September 15 | 105.1°F (1971) | 44.1°F (1955) | 0.01 in (1997) |
| September 16 | 102.0°F (1971) | 45.0°F (2006) | 0.02 in (1986) |
| September 17 | 93.9°F (1968) | 45.0°F (1959) | 0.38 in (1989) |
| September 18 | 95.0°F (1968) | 42.1°F (1954) | 0.53 in (1959) |
| September 19 | 93.0°F (2002) | 42.1°F (1993) | 1.78 in (1959) |
| September 20 | 95.0°F (1958) | 41.0°F (1965) | 0.05 in (1977) |
| September 21 | 97.0°F (2003) | 43.0°F (1982) | 0.03 in (1983) |
| September 22 | 97.0°F (2015) | 44.1°F (1968) | 0.42 in (2013) |
| September 23 | 95.0°F (1956) | 37.0°F (2010) | 0.13 in (1990) |
| September 24 | 93.9°F (1964) | 43.0°F (1955) | 0.40 in (1982) |
| September 25 | 99.0°F (1954) | 43.0°F (1993) | 0.28 in (1982) |
| September 26 | 95.0°F (1978) | 44.1°F (1993) | 0.40 in (1982) |
| September 27 | 95.0°F (1963) | 43.0°F (1982) | 0.50 in (1972) |
| September 28 | 95.0°F (1958) | 45.0°F (1965) | 0.32 in (1957) |
| September 29 | 93.9°F (2010) | 41.0°F (1981) | 0.29 in (1976) |
| September 30 | 95.0°F (1966) | 42.1°F (1954) | 0.94 in (1983) |