May weather in Mount Vernon, WA
The average temperature in Mount Vernon in May is 55.7°F (46.6°F–64.8°F). Average precipitation: inches.
May is a spring month in Mount Vernon, and is warmer than the annual average of 51.4°F. Daily temperatures swing about 18.2°F between overnight low and afternoon high. Daylight averages about 15h 0m. For travel, May is a comfortable month to visit.
Avg High
64.8°F
Avg Low
46.6°F
Precipitation
in
Daylight
15h 0m
May records in Mount Vernon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 79.0°F (1998) | 35.1°F (1994) | 0.76 in (1999) |
| May 2 | 71.1°F (1991) | 34.0°F (1956) | 0.52 in (1977) |
| May 3 | 73.0°F (1957) | 33.1°F (1980) | 0.30 in (1965) |
| May 4 | 78.1°F (1992) | 35.1°F (1969) | 0.60 in (2004) |
| May 5 | 79.0°F (1990) | 33.1°F (1978) | 0.68 in (1961) |
| May 6 | 73.0°F (1957) | 32.0°F (1965) | 1.13 in (1966) |
| May 7 | 75.0°F (1957) | 32.0°F (2002) | 0.90 in (1996) |
| May 8 | 75.9°F (1969) | 35.1°F (1975) | 0.54 in (1970) |
| May 9 | 81.0°F (1975) | 34.0°F (1963) | 0.75 in (2000) |
| May 10 | 78.1°F (1975) | 34.0°F (1999) | 0.78 in (1975) |
| May 11 | 82.9°F (1971) | 34.0°F (1963) | 0.68 in (1987) |
| May 12 | 79.0°F (2002) | 35.1°F (1970) | 0.84 in (1988) |
| May 13 | 84.9°F (1959) | 33.1°F (1958) | 0.58 in (1990) |
| May 14 | 82.0°F (1973) | 32.0°F (1964) | 0.57 in (1983) |
| May 15 | 80.1°F (1958) | 32.0°F (1964) | 0.47 in (1978) |
| May 16 | 80.1°F (1958) | 36.0°F (1963) | 1.86 in (1988) |
| May 17 | 80.1°F (1956) | 34.0°F (1974) | 1.24 in (1989) |
| May 18 | 84.0°F (1963) | 35.1°F (1970) | 0.45 in (2000) |
| May 19 | 81.0°F (1961) | 37.0°F (1962) | 0.75 in (1968) |
| May 20 | 82.0°F (1961) | 34.0°F (1975) | 0.62 in (1964) |
| May 21 | 89.1°F (1963) | 35.1°F (1973) | 0.55 in (1964) |
| May 22 | 87.1°F (1963) | 39.0°F (1960) | 0.69 in (1996) |
| May 23 | 89.1°F (1969) | 36.0°F (1964) | 0.87 in (1989) |
| May 24 | 82.0°F (1983) | 36.0°F (1978) | 0.68 in (1973) |
| May 25 | 84.0°F (1958) | 34.0°F (1964) | 0.63 in (1998) |
| May 26 | 82.0°F (1958) | 37.9°F (1964) | 0.76 in (1998) |
| May 27 | 79.0°F (1958) | 34.0°F (1966) | 1.07 in (2004) |
| May 28 | 84.0°F (1983) | 35.1°F (1966) | 0.59 in (1997) |
| May 29 | 88.0°F (1983) | 35.1°F (1966) | 1.19 in (1985) |
| May 30 | 82.9°F (1956) | 37.9°F (1962) | 0.55 in (1977) |
| May 31 | 82.9°F (1964) | 37.9°F (1974) | 1.45 in (1997) |