May weather in Griswold, IA
The average temperature in Griswold in May is 60.9°F (49.9°F–71.9°F). Average precipitation: 5.42 inches.
May is a spring month in Griswold, and is warmer than the annual average of 49.4°F. Daily temperatures swing about 22°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 19m. For travel, May is a wet month.
Avg High
71.9°F
Avg Low
49.9°F
Precipitation
5.42 in
Snow
0.1 in
May records in Griswold
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 91.0°F (1965) | 25.0°F (1966) | 1.16 in (2017) |
| May 2 | 89.1°F (1968) | 21.0°F (1961) | 1.82 in (2013) |
| May 3 | 89.1°F (1949) | 27.0°F (1935) | 2.92 in (1946) |
| May 4 | 91.0°F (1952) | 27.0°F (1954) | 1.35 in (1938) |
| May 5 | 91.9°F (1966) | 27.0°F (1944) | 0.95 in (1977) |
| May 6 | 96.1°F (1934) | 25.0°F (1925) | 3.67 in (2007) |
| May 7 | 96.1°F (1966) | 28.0°F (1925) | 1.75 in (1978) |
| May 8 | 96.1°F (1934) | 27.0°F (1980) | 1.44 in (1995) |
| May 9 | 93.9°F (1934) | 24.1°F (1980) | 1.40 in (1950) |
| May 10 | 93.9°F (2022) | 30.0°F (1981) | 1.89 in (1986) |
| May 11 | 96.1°F (2011) | 26.1°F (1925) | 1.71 in (2002) |
| May 12 | 95.0°F (1956) | 30.0°F (1924) | 3.00 in (2014) |
| May 13 | 96.1°F (1940) | 32.0°F (1952) | 1.23 in (2004) |
| May 14 | 93.9°F (1941) | 30.9°F (1926) | 0.97 in (2015) |
| May 15 | 99.0°F (2013) | 28.0°F (1959) | 2.20 in (1943) |
| May 16 | 93.0°F (1936) | 32.0°F (1929) | 2.32 in (1998) |
| May 17 | 91.9°F (2019) | 33.1°F (1973) | 2.82 in (1999) |
| May 18 | 95.0°F (1967) | 35.1°F (2002) | 2.73 in (1971) |
| May 19 | 93.9°F (1934) | 35.1°F (1929) | 1.06 in (1935) |
| May 20 | 98.1°F (1925) | 34.0°F (1963) | 0.86 in (2017) |
| May 21 | 98.1°F (1925) | 30.9°F (1931) | 1.43 in (2001) |
| May 22 | 99.0°F (1925) | 26.1°F (1963) | 1.93 in (2024) |
| May 23 | 95.0°F (1939) | 28.9°F (1963) | 2.38 in (2004) |
| May 24 | 100.9°F (1939) | 32.0°F (1924) | 1.25 in (2007) |
| May 25 | 100.0°F (1967) | 26.1°F (1925) | 2.42 in (2020) |
| May 26 | 95.0°F (1926) | 34.0°F (1940) | 1.87 in (1964) |
| May 27 | 97.0°F (2018) | 35.1°F (1971) | 1.76 in (1987) |
| May 28 | 99.0°F (2018) | 23.0°F (1963) | 2.71 in (1962) |
| May 29 | 102.0°F (1934) | 30.0°F (1947) | 1.31 in (1979) |
| May 30 | 104.0°F (1934) | 36.0°F (1930) | 1.78 in (2008) |
| May 31 | 102.9°F (1934) | 39.0°F (1972) | 1.43 in (2001) |