August weather in Union, IL
The average temperature in Union in August is 70.7°F (59.6°F–81.8°F). Average precipitation: 4.22 inches.
August is a summer month in Union, and is warmer than the annual average of 48.2°F. Daily temperatures swing about 22.2°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 13h 43m. For travel, August is a comfortable month to visit.
Avg High
81.8°F
Avg Low
59.6°F
Precipitation
4.22 in
Daylight
13h 43m
August records in Union
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 96.1°F (1894) | 44.1°F (1947) | 1.28 in (1945) |
| August 2 | 102.0°F (1988) | 44.1°F (1927) | 2.52 in (1942) |
| August 3 | 100.9°F (1930) | 44.1°F (1894) | 1.48 in (1959) |
| August 4 | 100.0°F (1988) | 42.1°F (1951) | 1.40 in (1982) |
| August 5 | 107.1°F (1918) | 44.1°F (1972) | 2.80 in (2014) |
| August 6 | 105.1°F (1918) | 43.0°F (1948) | 3.03 in (1996) |
| August 7 | 104.0°F (1918) | 45.0°F (1994) | 5.54 in (2007) |
| August 8 | 98.1°F (1934) | 46.0°F (1976) | 2.03 in (1991) |
| August 9 | 99.0°F (1936) | 44.1°F (1964) | 2.24 in (1988) |
| August 10 | 99.0°F (1944) | 42.1°F (1990) | 2.16 in (1913) |
| August 11 | 97.0°F (1941) | 44.1°F (1904) | 1.93 in (1911) |
| August 12 | 104.0°F (1918) | 43.0°F (1942) | 1.66 in (2005) |
| August 13 | 100.9°F (1918) | 45.0°F (1967) | 2.31 in (1985) |
| August 14 | 99.0°F (1944) | 42.1°F (1964) | 2.60 in (1987) |
| August 15 | 98.1°F (1944) | 43.0°F (1964) | 2.66 in (1903) |
| August 16 | 99.0°F (1937) | 42.1°F (1979) | 1.81 in (1965) |
| August 17 | 100.0°F (1947) | 44.1°F (1976) | 2.73 in (1968) |
| August 18 | 102.9°F (1988) | 39.0°F (1963) | 2.53 in (1990) |
| August 19 | 98.1°F (1947) | 44.1°F (1977) | 2.02 in (2005) |
| August 20 | 100.9°F (1947) | 39.9°F (1950) | 2.98 in (1926) |
| August 21 | 100.0°F (1947) | 41.0°F (1950) | 1.73 in (1904) |
| August 22 | 102.9°F (1947) | 43.0°F (1969) | 8.20 in (2002) |
| August 23 | 102.9°F (1947) | 44.1°F (1920) | 1.60 in (1910) |
| August 24 | 104.0°F (1947) | 41.0°F (1942) | 2.03 in (1905) |
| August 25 | 93.9°F (1925) | 39.0°F (1917) | 1.66 in (1965) |
| August 26 | 96.1°F (1991) | 42.1°F (1964) | 2.85 in (1972) |
| August 27 | 97.0°F (1973) | 42.1°F (1968) | 1.81 in (1923) |
| August 28 | 96.1°F (1947) | 39.9°F (1968) | 2.30 in (1977) |
| August 29 | 97.0°F (1925) | 39.0°F (1986) | 1.70 in (1955) |
| August 30 | 98.1°F (1941) | 37.0°F (1915) | 1.66 in (1957) |
| August 31 | 98.1°F (1953) | 42.1°F (1915) | 1.96 in (2013) |