May weather in Walla Walla, WA
The average temperature in Walla Walla in May is 60.4°F (49.3°F–71.4°F). Average precipitation: 2.07 inches.
May is a spring month in Walla Walla, and is warmer than the annual average of 54.3°F. Daily temperatures swing about 22.1°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 14h 45m. For travel, May is a comfortable month to visit.
Avg High
71.4°F
Avg Low
49.3°F
Precipitation
2.07 in
Daylight
14h 45m
May records in Walla Walla
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 82.9°F (2014) | 26.1°F (1954) | 1.12 in (1949) |
| May 2 | 86.0°F (2025) | 32.0°F (1954) | 0.49 in (1999) |
| May 3 | 89.1°F (1966) | 33.1°F (2006) | 1.03 in (1993) |
| May 4 | 93.0°F (1966) | 34.0°F (1962) | 0.59 in (1956) |
| May 5 | 95.0°F (1966) | 34.0°F (1965) | 1.34 in (2024) |
| May 6 | 93.0°F (1992) | 34.0°F (2001) | 0.75 in (2020) |
| May 7 | 91.0°F (1987) | 32.0°F (2002) | 0.78 in (1956) |
| May 8 | 93.0°F (1987) | 37.0°F (1999) | 1.34 in (1991) |
| May 9 | 90.0°F (1994) | 36.0°F (1999) | 0.92 in (1962) |
| May 10 | 93.0°F (2013) | 34.0°F (1999) | 0.52 in (1956) |
| May 11 | 91.0°F (1988) | 32.0°F (2012) | 0.49 in (1958) |
| May 12 | 95.0°F (1988) | 37.0°F (1985) | 0.73 in (1967) |
| May 13 | 91.9°F (1959) | 37.0°F (2022) | 0.98 in (2015) |
| May 14 | 99.0°F (1973) | 35.1°F (1955) | 1.37 in (2011) |
| May 15 | 93.9°F (1973) | 37.9°F (1974) | 1.06 in (1955) |
| May 16 | 93.9°F (2006) | 36.0°F (1974) | 0.82 in (2017) |
| May 17 | 95.0°F (2006) | 37.0°F (1971) | 1.49 in (1991) |
| May 18 | 93.9°F (2006) | 37.0°F (1971) | 0.85 in (1957) |
| May 19 | 91.0°F (2023) | 39.0°F (1976) | 1.28 in (1991) |
| May 20 | 91.9°F (2023) | 35.1°F (1987) | 1.66 in (2020) |
| May 21 | 90.0°F (1958) | 36.0°F (1971) | 1.21 in (1986) |
| May 22 | 95.0°F (1979) | 35.1°F (1960) | 0.48 in (1984) |
| May 23 | 95.0°F (2001) | 37.9°F (1950) | 0.78 in (1990) |
| May 24 | 93.0°F (1992) | 39.9°F (1950) | 1.21 in (1958) |
| May 25 | 95.0°F (1966) | 37.9°F (1978) | 0.96 in (1961) |
| May 26 | 93.0°F (1958) | 37.0°F (1967) | 1.70 in (1971) |
| May 27 | 93.9°F (1983) | 39.0°F (1955) | 0.74 in (2010) |
| May 28 | 100.0°F (1983) | 41.0°F (1954) | 1.23 in (1988) |
| May 29 | 99.0°F (1983) | 37.0°F (1951) | 0.49 in (2022) |
| May 30 | 97.0°F (2017) | 39.9°F (1950) | 1.37 in (2000) |
| May 31 | 99.0°F (1986) | 39.0°F (1966) | 1.10 in (2000) |