May weather in Casey, IL
The average temperature in Casey in May is 64.9°F (53.9°F–75.9°F). Average precipitation: 4.48 inches.
May is a spring month in Casey, and is warmer than the annual average of 54.1°F. Daily temperatures swing about 22°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 14h 9m. For travel, May is a comfortable month to visit.
Avg High
75.9°F
Avg Low
53.9°F
Precipitation
4.48 in
Daylight
14h 9m
May records in Casey
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 84.9°F (1895) | 30.9°F (1907) | 2.35 in (1940) |
| May 2 | 84.9°F (1902) | 32.0°F (1908) | 2.68 in (1935) |
| May 3 | 88.0°F (1902) | 37.0°F (1907) | 3.00 in (1908) |
| May 4 | 87.1°F (1895) | 30.9°F (1910) | 2.02 in (2025) |
| May 5 | 88.0°F (1895) | 35.1°F (1910) | 1.13 in (2017) |
| May 6 | 87.1°F (2015) | 37.9°F (2020) | 2.47 in (2002) |
| May 7 | 87.1°F (1896) | 30.9°F (1906) | 4.00 in (1908) |
| May 8 | 90.0°F (1896) | 33.1°F (1989) | 1.21 in (2008) |
| May 9 | 93.0°F (1899) | 30.0°F (2020) | 1.10 in (1905) |
| May 10 | 98.1°F (1907) | 34.0°F (1900) | 3.49 in (2006) |
| May 11 | 89.1°F (2022) | 33.1°F (1909) | 1.52 in (1943) |
| May 12 | 91.9°F (2022) | 28.9°F (1981) | 3.90 in (2002) |
| May 13 | 90.0°F (1902) | 35.1°F (1910) | 2.13 in (1933) |
| May 14 | 91.9°F (2018) | 28.0°F (1895) | 1.74 in (2009) |
| May 15 | 93.0°F (2018) | 37.9°F (2016) | 1.58 in (1923) |
| May 16 | 90.0°F (1900) | 36.0°F (1984) | 1.62 in (1990) |
| May 17 | 91.0°F (1906) | 42.1°F (1893) | 2.83 in (1928) |
| May 18 | 89.1°F (1902) | 39.0°F (1894) | 3.02 in (1929) |
| May 19 | 89.1°F (2017) | 37.0°F (1894) | 2.00 in (1957) |
| May 20 | 90.0°F (1902) | 37.0°F (1906) | 1.28 in (1915) |
| May 21 | 90.0°F (1987) | 34.0°F (1907) | 1.85 in (1917) |
| May 22 | 97.0°F (1902) | 36.0°F (1895) | 1.54 in (1949) |
| May 23 | 91.9°F (1906) | 39.0°F (1895) | 1.14 in (1988) |
| May 24 | 93.0°F (1908) | 43.0°F (1895) | 1.49 in (1924) |
| May 25 | 90.0°F (1908) | 39.9°F (1897) | 2.25 in (1909) |
| May 26 | 91.0°F (2018) | 39.0°F (1983) | 1.72 in (1915) |
| May 27 | 91.9°F (2018) | 37.0°F (1895) | 2.50 in (2000) |
| May 28 | 93.9°F (2018) | 35.1°F (1907) | 2.28 in (1929) |
| May 29 | 93.9°F (2018) | 39.0°F (1897) | 3.22 in (1915) |
| May 30 | 93.0°F (1895) | 41.0°F (1984) | 1.78 in (1927) |
| May 31 | 93.0°F (1895) | 39.0°F (1894) | 2.00 in (1907) |