May weather in Merrill, IA
The average temperature in Merrill in May is 59.3°F (47.0°F–71.7°F). Average precipitation: 3.90 inches.
May is a spring month in Merrill, and is warmer than the annual average of 46.9°F. Daily temperatures swing about 24.7°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 14h 27m. For travel, May is a comfortable month to visit.
Avg High
71.7°F
Avg Low
47.0°F
Precipitation
3.90 in
Snow
0.1 in
May records in Merrill
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 93.0°F (1959) | 17.1°F (1907) | 2.31 in (1972) |
| May 2 | 93.9°F (2021) | 18.0°F (1961) | 1.85 in (1913) |
| May 3 | 93.9°F (1949) | 21.9°F (1967) | 1.85 in (1928) |
| May 4 | 93.0°F (1952) | 21.9°F (1907) | 1.70 in (1901) |
| May 5 | 93.0°F (1936) | 26.1°F (1944) | 1.31 in (1938) |
| May 6 | 99.0°F (1934) | 25.0°F (1925) | 1.81 in (1964) |
| May 7 | 91.9°F (1934) | 28.0°F (1907) | 2.41 in (1930) |
| May 8 | 99.0°F (1934) | 24.1°F (1960) | 1.14 in (2019) |
| May 9 | 91.0°F (1987) | 26.1°F (1923) | 1.43 in (1990) |
| May 10 | 95.0°F (2011) | 28.0°F (1909) | 1.47 in (1967) |
| May 11 | 91.9°F (2011) | 25.0°F (1946) | 1.52 in (2002) |
| May 12 | 93.9°F (2022) | 27.0°F (1946) | 1.74 in (1964) |
| May 13 | 99.0°F (2022) | 27.0°F (1997) | 2.40 in (1913) |
| May 14 | 96.1°F (2001) | 28.9°F (1997) | 2.32 in (1905) |
| May 15 | 100.9°F (2013) | 26.1°F (1959) | 1.02 in (1965) |
| May 16 | 91.9°F (1934) | 27.0°F (2014) | 1.85 in (1992) |
| May 17 | 97.0°F (1934) | 27.0°F (1925) | 2.38 in (2000) |
| May 18 | 100.0°F (1934) | 32.0°F (1915) | 1.16 in (1962) |
| May 19 | 100.0°F (1934) | 35.1°F (1997) | 2.00 in (1903) |
| May 20 | 98.1°F (1934) | 28.0°F (1907) | 1.24 in (2012) |
| May 21 | 98.1°F (1973) | 28.0°F (1931) | 2.15 in (1945) |
| May 22 | 98.1°F (1925) | 28.0°F (1963) | 1.82 in (2004) |
| May 23 | 93.9°F (1964) | 28.0°F (1963) | 2.26 in (1914) |
| May 24 | 98.1°F (1939) | 30.9°F (1924) | 2.40 in (2016) |
| May 25 | 102.9°F (1967) | 27.0°F (1925) | 1.70 in (1904) |
| May 26 | 99.0°F (1967) | 32.0°F (1905) | 2.38 in (2013) |
| May 27 | 96.1°F (2018) | 30.9°F (1907) | 1.84 in (1954) |
| May 28 | 100.9°F (2018) | 33.1°F (1906) | 1.90 in (1995) |
| May 29 | 105.1°F (1934) | 25.0°F (1947) | 2.15 in (2008) |
| May 30 | 108.0°F (1934) | 33.1°F (1930) | 2.09 in (1980) |
| May 31 | 102.9°F (1934) | 30.9°F (1897) | 1.34 in (1918) |