July weather in Alton, MO
The average temperature in Alton in July is 77.1°F (65.9°F–88.3°F). Average precipitation: 4.01 inches.
July is a summer month in Alton, and is warmer than the annual average of 55.7°F. Daily temperatures swing about 22.4°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 14h 17m. For travel, July is hot.
Avg High
88.3°F
Avg Low
65.9°F
Precipitation
4.01 in
Daylight
14h 17m
July records in Alton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| July 1 | 105.1°F (2012) | 50.0°F (1976) | 1.71 in (2007) |
| July 2 | 104.0°F (2012) | 52.0°F (1995) | 0.98 in (2021) |
| July 3 | 100.9°F (2012) | 48.9°F (2013) | 2.12 in (2004) |
| July 4 | 98.1°F (1978) | 48.9°F (1968) | 2.06 in (1995) |
| July 5 | 105.1°F (2012) | 46.0°F (1972) | 1.90 in (1963) |
| July 6 | 102.9°F (2012) | 46.0°F (1972) | 1.63 in (2017) |
| July 7 | 106.0°F (2012) | 46.9°F (1972) | 2.20 in (2011) |
| July 8 | 102.9°F (2012) | 50.0°F (2006) | 0.96 in (2023) |
| July 9 | 100.9°F (1966) | 57.0°F (1970) | 1.80 in (1979) |
| July 10 | 102.9°F (1966) | 53.1°F (1963) | 1.70 in (1982) |
| July 11 | 102.9°F (1966) | 52.0°F (1963) | 3.23 in (2006) |
| July 12 | 104.0°F (1966) | 55.9°F (1973) | 2.58 in (1958) |
| July 13 | 104.0°F (1966) | 48.9°F (1975) | 2.34 in (2008) |
| July 14 | 105.1°F (1966) | 46.0°F (1975) | 1.70 in (1952) |
| July 15 | 102.9°F (1966) | 52.0°F (1975) | 2.20 in (2012) |
| July 16 | 97.0°F (1969) | 51.1°F (1967) | 1.85 in (1970) |
| July 17 | 99.0°F (1971) | 50.0°F (1976) | 1.72 in (2004) |
| July 18 | 100.9°F (1966) | 53.1°F (2009) | 1.85 in (1995) |
| July 19 | 100.0°F (1964) | 53.1°F (2009) | 3.35 in (2002) |
| July 20 | 102.0°F (2012) | 53.1°F (2009) | 1.07 in (1970) |
| July 21 | 100.9°F (1998) | 48.0°F (1970) | 0.88 in (1958) |
| July 22 | 100.9°F (2001) | 53.1°F (2007) | 0.85 in (2013) |
| July 23 | 99.0°F (1998) | 52.0°F (1966) | 1.58 in (1968) |
| July 24 | 100.0°F (1965) | 54.0°F (2000) | 1.33 in (1956) |
| July 25 | 99.0°F (2005) | 53.1°F (2000) | 0.84 in (1998) |
| July 26 | 100.9°F (1997) | 54.0°F (2000) | 1.00 in (1951) |
| July 27 | 102.0°F (1997) | 55.0°F (2004) | 2.15 in (1961) |
| July 28 | 100.9°F (1966) | 51.1°F (1978) | 2.60 in (1972) |
| July 29 | 98.1°F (1976) | 53.1°F (2004) | 1.44 in (2000) |
| July 30 | 100.9°F (1999) | 52.0°F (1974) | 1.53 in (2020) |
| July 31 | 107.1°F (2012) | 46.0°F (1971) | 1.10 in (1967) |