May weather in St. John, WA
The average temperature in St. John in May is 55.6°F (44.8°F–66.4°F). Average precipitation: 1.56 inches.
May is a spring month in St. John, and is warmer than the annual average of 49.3°F. Daily temperatures swing about 21.6°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 14h 52m. For travel, May is a comfortable month to visit.
Avg High
66.4°F
Avg Low
44.8°F
Precipitation
1.56 in
Daylight
14h 52m
May records in St. John
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 84.9°F (1998) | 23.0°F (1972) | 0.30 in (1989) |
| May 2 | 84.9°F (1998) | 23.0°F (1968) | 0.32 in (1984) |
| May 3 | 86.0°F (1966) | 23.0°F (1968) | 0.43 in (1975) |
| May 4 | 88.0°F (1966) | 21.9°F (1982) | 0.76 in (1981) |
| May 5 | 93.0°F (1966) | 12.9°F (1984) | 0.49 in (1979) |
| May 6 | 89.1°F (1992) | 21.0°F (1965) | 0.68 in (1983) |
| May 7 | 91.0°F (1987) | 25.0°F (1965) | 0.25 in (2011) |
| May 8 | 91.0°F (1987) | 26.1°F (1981) | 1.02 in (1972) |
| May 9 | 89.1°F (1987) | 27.0°F (2006) | 0.62 in (1972) |
| May 10 | 86.0°F (1987) | 27.0°F (1985) | 0.75 in (2005) |
| May 11 | 91.0°F (1993) | 5.0°F (1984) | 1.06 in (1975) |
| May 12 | 96.1°F (1993) | 19.0°F (1985) | 0.77 in (1998) |
| May 13 | 93.9°F (1993) | 24.1°F (1985) | 0.40 in (2015) |
| May 14 | 99.0°F (1973) | 27.0°F (1964) | 0.48 in (2001) |
| May 15 | 91.9°F (1973) | 28.0°F (1985) | 0.50 in (2016) |
| May 16 | 90.0°F (1973) | 28.0°F (1974) | 1.10 in (2011) |
| May 17 | 91.9°F (2006) | 28.0°F (1966) | 0.64 in (1998) |
| May 18 | 91.9°F (2006) | 25.0°F (1965) | 0.58 in (1991) |
| May 19 | 84.9°F (1993) | 28.0°F (1979) | 0.50 in (1969) |
| May 20 | 84.0°F (1993) | 27.0°F (1987) | 1.12 in (1994) |
| May 21 | 82.9°F (1988) | 28.9°F (1975) | 0.70 in (2007) |
| May 22 | 84.9°F (1979) | 30.0°F (1978) | 0.39 in (2002) |
| May 23 | 91.9°F (2001) | 28.0°F (1978) | 0.95 in (1979) |
| May 24 | 91.9°F (2001) | 19.9°F (1984) | 0.82 in (1990) |
| May 25 | 88.0°F (1992) | 25.0°F (1964) | 0.54 in (1998) |
| May 26 | 88.0°F (1992) | 30.0°F (1964) | 1.22 in (1980) |
| May 27 | 88.0°F (1983) | 30.0°F (1981) | 0.86 in (2010) |
| May 28 | 93.0°F (1983) | 30.9°F (1981) | 0.60 in (1988) |
| May 29 | 95.0°F (1986) | 28.0°F (1979) | 0.36 in (1997) |
| May 30 | 96.1°F (1986) | 27.0°F (1978) | 0.48 in (1987) |
| May 31 | 95.0°F (1986) | 28.9°F (1967) | 0.81 in (2020) |