May weather in Jefferson, OR
The average temperature in Jefferson in May is 56.4°F (45.7°F–67.0°F). Average precipitation: 3.29 inches.
May is a spring month in Jefferson, and is warmer than the annual average of 52.8°F. Daily temperatures swing about 21.3°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 38m. For travel, May is a comfortable month to visit.
Avg High
67.0°F
Avg Low
45.7°F
Precipitation
3.29 in
Daylight
14h 38m
May records in Jefferson
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 86.0°F (2014) | 30.9°F (1954) | 0.70 in (2024) |
| May 2 | 86.0°F (2014) | 30.9°F (1964) | 1.22 in (2009) |
| May 3 | 82.9°F (2016) | 32.0°F (1952) | 1.85 in (2007) |
| May 4 | 84.9°F (1953) | 30.9°F (1962) | 1.07 in (2024) |
| May 5 | 86.0°F (1953) | 32.0°F (1952) | 1.12 in (1959) |
| May 6 | 84.0°F (1992) | 34.0°F (1954) | 1.60 in (1963) |
| May 7 | 90.0°F (1987) | 32.0°F (1968) | 0.82 in (1963) |
| May 8 | 91.9°F (1987) | 34.0°F (2002) | 1.20 in (1991) |
| May 9 | 93.9°F (1987) | 30.9°F (1955) | 0.75 in (2014) |
| May 10 | 88.0°F (1987) | 34.0°F (2012) | 0.89 in (2000) |
| May 11 | 88.0°F (2024) | 30.9°F (1985) | 0.50 in (2008) |
| May 12 | 90.0°F (1997) | 32.0°F (1985) | 0.67 in (1987) |
| May 13 | 93.0°F (2023) | 33.1°F (1958) | 0.65 in (1978) |
| May 14 | 93.0°F (2023) | 32.0°F (1964) | 1.15 in (1978) |
| May 15 | 89.1°F (2014) | 35.1°F (1985) | 0.87 in (2001) |
| May 16 | 88.0°F (1956) | 35.1°F (1980) | 0.93 in (1972) |
| May 17 | 98.1°F (2008) | 33.1°F (1966) | 1.85 in (1991) |
| May 18 | 93.0°F (2008) | 36.0°F (1976) | 1.38 in (1991) |
| May 19 | 89.1°F (1963) | 36.0°F (1970) | 1.80 in (2005) |
| May 20 | 93.0°F (1963) | 34.0°F (1975) | 1.04 in (1960) |
| May 21 | 89.1°F (1963) | 34.0°F (1973) | 1.27 in (1998) |
| May 22 | 87.1°F (1988) | 33.1°F (1955) | 2.05 in (2007) |
| May 23 | 93.9°F (2001) | 33.1°F (1964) | 1.03 in (1984) |
| May 24 | 91.0°F (1999) | 34.0°F (1955) | 0.85 in (1973) |
| May 25 | 89.1°F (1992) | 35.1°F (1953) | 0.90 in (1968) |
| May 26 | 88.0°F (2005) | 34.0°F (1973) | 0.89 in (1971) |
| May 27 | 93.0°F (2005) | 30.9°F (1966) | 0.83 in (1953) |
| May 28 | 93.0°F (2005) | 36.0°F (1955) | 0.89 in (2011) |
| May 29 | 98.1°F (1983) | 37.0°F (1979) | 1.00 in (2022) |
| May 30 | 86.0°F (1973) | 35.1°F (1952) | 0.78 in (1998) |
| May 31 | 90.0°F (1986) | 33.1°F (1953) | 0.88 in (1976) |