May weather in Jefferson, IA
The average temperature in Jefferson in May is 59.9°F (48.7°F–71.1°F). Average precipitation: 4.97 inches.
May is a spring month in Jefferson, and is warmer than the annual average of 47.8°F. Daily temperatures swing about 22.4°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 14h 23m. For travel, May is a comfortable month to visit.
Avg High
71.1°F
Avg Low
48.7°F
Precipitation
4.97 in
Daylight
14h 23m
May records in Jefferson
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 91.9°F (1987) | 26.1°F (1966) | 1.28 in (1951) |
| May 2 | 90.0°F (1968) | 19.0°F (1961) | 1.55 in (1913) |
| May 3 | 89.1°F (1918) | 21.9°F (1907) | 2.19 in (1987) |
| May 4 | 91.9°F (1918) | 19.0°F (1907) | 2.09 in (1938) |
| May 5 | 93.9°F (1909) | 28.0°F (1929) | 3.58 in (2003) |
| May 6 | 93.9°F (1934) | 28.0°F (1925) | 2.30 in (1960) |
| May 7 | 89.1°F (1934) | 25.0°F (1931) | 2.43 in (1964) |
| May 8 | 93.9°F (1934) | 28.9°F (1980) | 1.49 in (1964) |
| May 9 | 91.9°F (1934) | 28.9°F (1915) | 1.63 in (1950) |
| May 10 | 95.0°F (2022) | 30.0°F (1981) | 2.66 in (1995) |
| May 11 | 100.0°F (2011) | 28.0°F (1946) | 2.35 in (1893) |
| May 12 | 95.0°F (2000) | 28.9°F (1979) | 2.67 in (2014) |
| May 13 | 91.9°F (1940) | 28.9°F (1997) | 1.84 in (2010) |
| May 14 | 93.9°F (1988) | 30.9°F (1926) | 2.64 in (1970) |
| May 15 | 100.9°F (2013) | 30.9°F (1983) | 2.60 in (1909) |
| May 16 | 91.0°F (2001) | 30.0°F (1921) | 1.85 in (1974) |
| May 17 | 91.9°F (1934) | 32.0°F (1925) | 2.10 in (1938) |
| May 18 | 93.9°F (1934) | 28.9°F (1989) | 2.14 in (1971) |
| May 19 | 93.9°F (1934) | 33.1°F (1929) | 2.56 in (1990) |
| May 20 | 93.9°F (1934) | 26.1°F (1907) | 3.03 in (1933) |
| May 21 | 90.0°F (1925) | 30.0°F (1895) | 2.72 in (1945) |
| May 22 | 99.0°F (1925) | 28.9°F (1963) | 1.50 in (1893) |
| May 23 | 91.9°F (1939) | 30.9°F (1963) | 1.95 in (2004) |
| May 24 | 100.0°F (1939) | 33.1°F (1924) | 2.04 in (1950) |
| May 25 | 93.9°F (1911) | 28.0°F (1925) | 1.91 in (1984) |
| May 26 | 98.1°F (1967) | 30.0°F (1895) | 1.64 in (1937) |
| May 27 | 91.9°F (1967) | 30.0°F (1907) | 4.10 in (2013) |
| May 28 | 96.1°F (2012) | 32.0°F (1947) | 2.27 in (1995) |
| May 29 | 100.9°F (1934) | 28.9°F (1947) | 2.20 in (1962) |
| May 30 | 104.0°F (1934) | 36.0°F (1924) | 5.90 in (2008) |
| May 31 | 102.0°F (1934) | 39.9°F (1972) | 3.02 in (1959) |