May weather in Petaluma, CA
The average temperature in Petaluma in May is 59.6°F (47.4°F–71.9°F). Average precipitation: 0.93 inches.
May is a spring month in Petaluma, and is warmer than the annual average of 58°F. Daily temperatures swing about 24.5°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 14h 4m. For travel, May is a comfortable month to visit.
Avg High
71.9°F
Avg Low
47.4°F
Precipitation
0.93 in
Daylight
14h 4m
May records in Petaluma
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 91.0°F (1947) | 34.0°F (1933) | 0.94 in (1995) |
| May 2 | 91.0°F (1966) | 33.1°F (1915) | 0.35 in (2009) |
| May 3 | 91.0°F (2013) | 34.0°F (1913) | 0.95 in (2003) |
| May 4 | 91.0°F (2013) | 32.0°F (1917) | 0.60 in (1915) |
| May 5 | 96.1°F (1987) | 32.0°F (1930) | 0.95 in (2009) |
| May 6 | 97.0°F (1987) | 34.0°F (1930) | 0.53 in (1933) |
| May 7 | 98.1°F (1987) | 30.9°F (1930) | 0.96 in (1994) |
| May 8 | 91.9°F (1931) | 32.0°F (1930) | 0.81 in (2005) |
| May 9 | 93.9°F (1931) | 30.9°F (1930) | 0.62 in (1915) |
| May 10 | 91.9°F (1934) | 27.0°F (1985) | 0.26 in (1915) |
| May 11 | 91.9°F (1959) | 32.0°F (1930) | 0.50 in (1942) |
| May 12 | 100.9°F (1976) | 36.0°F (1916) | 1.18 in (1925) |
| May 13 | 95.0°F (1972) | 35.1°F (1917) | 0.40 in (1968) |
| May 14 | 95.0°F (1970) | 34.0°F (1918) | 0.46 in (2000) |
| May 15 | 100.0°F (2008) | 34.0°F (1917) | 0.22 in (2019) |
| May 16 | 96.1°F (2008) | 35.1°F (1930) | 1.78 in (1996) |
| May 17 | 99.0°F (1997) | 34.0°F (1930) | 0.82 in (1944) |
| May 18 | 91.9°F (1997) | 34.0°F (1918) | 1.32 in (1925) |
| May 19 | 93.9°F (1931) | 33.1°F (1918) | 1.70 in (1925) |
| May 20 | 96.1°F (1988) | 33.1°F (1918) | 0.50 in (1957) |
| May 21 | 91.9°F (2000) | 34.0°F (1929) | 2.26 in (1921) |
| May 22 | 95.0°F (1943) | 37.0°F (1922) | 0.18 in (1939) |
| May 23 | 97.0°F (1943) | 37.9°F (1917) | 0.38 in (1997) |
| May 24 | 99.0°F (1982) | 34.0°F (1925) | 0.60 in (1934) |
| May 25 | 95.0°F (1951) | 37.0°F (1918) | 0.44 in (1942) |
| May 26 | 93.9°F (1974) | 36.0°F (1917) | 0.58 in (1934) |
| May 27 | 98.1°F (1984) | 37.9°F (1916) | 0.82 in (1990) |
| May 28 | 99.0°F (1984) | 39.0°F (1959) | 0.90 in (1998) |
| May 29 | 100.9°F (1950) | 36.0°F (1985) | 0.75 in (1998) |
| May 30 | 98.1°F (2001) | 34.0°F (1929) | 0.93 in (1940) |
| May 31 | 99.0°F (1970) | 34.0°F (1915) | 0.25 in (1993) |