May weather in San Jacinto, CA
The average temperature in San Jacinto in May is 66.8°F (53.3°F–80.4°F). Average precipitation: 0.47 inches.
May is a spring month in San Jacinto, and is warmer than the annual average of 65°F. Daily temperatures swing about 27.1°F between overnight low and afternoon high. Expect about 2 days with precipitation. Daylight averages about 13h 45m. For travel, May is a comfortable month to visit.
Avg High
80.4°F
Avg Low
53.3°F
Precipitation
0.47 in
Daylight
13h 45m
May records in San Jacinto
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 97.0°F (1985) | 37.9°F (1988) | 0.23 in (1983) |
| May 2 | 99.0°F (2014) | 37.9°F (2008) | 1.65 in (1983) |
| May 3 | 100.9°F (2004) | 41.0°F (1991) | 0.08 in (2018) |
| May 4 | 100.9°F (1989) | 39.9°F (1991) | 0.51 in (2023) |
| May 5 | 100.9°F (1987) | 41.0°F (1988) | 0.55 in (1998) |
| May 6 | 102.9°F (1987) | 41.0°F (1995) | 0.35 in (2016) |
| May 7 | 99.0°F (1989) | 39.9°F (1988) | 0.60 in (1998) |
| May 8 | 102.0°F (2001) | 39.9°F (1986) | 0.29 in (2015) |
| May 9 | 99.0°F (1984) | 37.9°F (1979) | 0.20 in (1987) |
| May 10 | 102.0°F (2025) | 36.0°F (1989) | 0.13 in (1987) |
| May 11 | 105.1°F (1996) | 37.0°F (1989) | 0.05 in (1992) |
| May 12 | 102.0°F (2013) | 41.0°F (1991) | 0.01 in (1987) |
| May 13 | 102.0°F (2013) | 39.9°F (1982) | 1.25 in (1998) |
| May 14 | 99.0°F (1979) | 44.1°F (1998) | 0.38 in (1951) |
| May 15 | 102.0°F (2014) | 39.0°F (1989) | 0.55 in (2015) |
| May 16 | 102.9°F (2009) | 37.9°F (2011) | 0.03 in (1993) |
| May 17 | 102.9°F (2009) | 39.9°F (1989) | 0.11 in (2011) |
| May 18 | 104.0°F (1986) | 39.0°F (1989) | 0.15 in (2011) |
| May 19 | 100.9°F (2008) | 39.0°F (1991) | 0.34 in (2019) |
| May 20 | 100.0°F (2000) | 39.9°F (1991) | 0.16 in (2019) |
| May 21 | 105.1°F (2000) | 43.0°F (1981) | 0.07 in (1980) |
| May 22 | 104.0°F (1988) | 42.1°F (2002) | 0.74 in (1992) |
| May 23 | 105.1°F (2001) | 44.1°F (1989) | 2.00 in (2008) |
| May 24 | 105.1°F (2001) | 41.0°F (1980) | 0.20 in (2010) |
| May 25 | 99.0°F (2001) | 39.9°F (1980) | 0.25 in (2008) |
| May 26 | 99.0°F (2020) | 41.0°F (1980) | 0.18 in (2000) |
| May 27 | 102.9°F (2003) | 44.1°F (1980) | 0.23 in (2019) |
| May 28 | 109.0°F (2003) | 45.0°F (1985) | 0.30 in (1990) |
| May 29 | 109.9°F (1984) | 45.0°F (1985) | 0.51 in (1990) |
| May 30 | 102.9°F (2002) | 41.0°F (1988) | 0.00 in (1949) |
| May 31 | 104.0°F (2012) | 43.0°F (1988) | 0.03 in (1994) |