May weather in Fairfax, IA
The average temperature in Fairfax in May is 60.3°F (49.5°F–71.1°F). Average precipitation: 4.25 inches.
May is a spring month in Fairfax, and is warmer than the annual average of 48.3°F. Daily temperatures swing about 21.6°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 22m. For travel, May is a comfortable month to visit.
Avg High
71.1°F
Avg Low
49.5°F
Precipitation
4.25 in
Daylight
14h 22m
May records in Fairfax
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 87.1°F (1965) | 30.9°F (1978) | 1.58 in (1973) |
| May 2 | 89.1°F (1968) | 26.1°F (1961) | 1.41 in (1979) |
| May 3 | 86.0°F (1969) | 25.0°F (2005) | 1.90 in (2013) |
| May 4 | 89.1°F (1980) | 27.0°F (2011) | 1.22 in (1990) |
| May 5 | 87.1°F (1962) | 32.0°F (1954) | 1.06 in (1982) |
| May 6 | 84.9°F (1964) | 30.0°F (1989) | 1.81 in (1960) |
| May 7 | 86.0°F (1964) | 30.0°F (1954) | 1.40 in (1972) |
| May 8 | 91.0°F (1963) | 32.0°F (2021) | 1.21 in (2003) |
| May 9 | 93.0°F (1963) | 26.2°F (2020) | 3.39 in (1996) |
| May 10 | 91.0°F (2011) | 26.1°F (1966) | 1.78 in (1959) |
| May 11 | 91.0°F (2022) | 32.0°F (1966) | 2.32 in (1966) |
| May 12 | 93.0°F (2022) | 32.0°F (2013) | 1.26 in (1970) |
| May 13 | 88.0°F (1991) | 34.0°F (1997) | 2.39 in (1974) |
| May 14 | 93.9°F (2013) | 35.1°F (1966) | 1.63 in (2003) |
| May 15 | 90.0°F (1977) | 33.1°F (2016) | 1.28 in (1986) |
| May 16 | 90.0°F (1992) | 30.9°F (1997) | 2.62 in (1974) |
| May 17 | 91.0°F (1971) | 33.1°F (2014) | 1.21 in (2004) |
| May 18 | 91.9°F (1964) | 35.1°F (2002) | 2.02 in (2019) |
| May 19 | 93.0°F (1975) | 34.0°F (2002) | 0.82 in (2025) |
| May 20 | 93.0°F (1975) | 37.0°F (1993) | 1.26 in (1987) |
| May 21 | 91.0°F (1964) | 34.0°F (2002) | 1.20 in (2001) |
| May 22 | 93.0°F (1956) | 30.9°F (1963) | 1.38 in (2004) |
| May 23 | 90.0°F (1967) | 35.1°F (1963) | 1.54 in (1995) |
| May 24 | 90.0°F (2010) | 39.0°F (2001) | 1.21 in (1996) |
| May 25 | 93.9°F (1967) | 37.9°F (1988) | 1.20 in (1990) |
| May 26 | 96.1°F (1978) | 33.1°F (1961) | 2.52 in (1986) |
| May 27 | 97.0°F (2018) | 35.1°F (1992) | 1.62 in (1973) |
| May 28 | 95.0°F (1991) | 39.9°F (1965) | 3.32 in (1962) |
| May 29 | 91.0°F (1991) | 37.0°F (1965) | 1.52 in (1991) |
| May 30 | 89.1°F (1979) | 37.9°F (2021) | 1.44 in (2004) |
| May 31 | 90.0°F (1988) | 39.0°F (1966) | 1.90 in (2000) |