August weather in St. Augustine, IL
The average temperature in St. Augustine in August is 71.1°F (59.8°F–82.3°F). Average precipitation: 3.67 inches.
August is a summer month in St. Augustine, and is warmer than the annual average of 49.4°F. Daily temperatures swing about 22.5°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 13h 38m. For travel, August is a comfortable month to visit.
Avg High
82.3°F
Avg Low
59.8°F
Precipitation
3.67 in
Daylight
13h 38m
August records in St. Augustine
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 93.0°F (2012) | 54.0°F (2009) | 1.23 in (1970) |
| August 2 | 95.0°F (2012) | 46.0°F (2015) | 1.10 in (1961) |
| August 3 | 96.1°F (2012) | 53.1°F (2009) | 1.34 in (2001) |
| August 4 | 93.9°F (2010) | 50.0°F (2017) | 1.42 in (1997) |
| August 5 | 91.9°F (2008) | 48.0°F (2017) | 2.54 in (2023) |
| August 6 | 90.0°F (2018) | 52.0°F (2012) | 1.33 in (1986) |
| August 7 | 91.9°F (2022) | 55.0°F (2012) | 1.31 in (2023) |
| August 8 | 96.1°F (2012) | 51.1°F (2017) | 1.78 in (1982) |
| August 9 | 90.0°F (2010) | 51.1°F (2017) | 2.02 in (1969) |
| August 10 | 90.0°F (2009) | 48.9°F (2024) | 1.53 in (1993) |
| August 11 | 93.0°F (2010) | 48.9°F (2008) | 3.16 in (1952) |
| August 12 | 89.1°F (2010) | 50.0°F (2008) | 1.31 in (1976) |
| August 13 | 93.0°F (2010) | 48.9°F (2017) | 2.92 in (1956) |
| August 14 | 90.0°F (2010) | 48.9°F (2017) | 2.00 in (1980) |
| August 15 | 89.1°F (2010) | 48.9°F (2011) | 4.18 in (1952) |
| August 16 | 90.0°F (2025) | 48.9°F (2008) | 2.73 in (1993) |
| August 17 | 91.0°F (2025) | 48.9°F (2012) | 1.95 in (1997) |
| August 18 | 89.1°F (2025) | 46.0°F (2012) | 1.59 in (1978) |
| August 19 | 91.0°F (2025) | 50.0°F (2012) | 1.81 in (1996) |
| August 20 | 91.9°F (2011) | 48.9°F (2012) | 0.99 in (2009) |
| August 21 | 90.0°F (2010) | 46.9°F (2012) | 1.21 in (1964) |
| August 22 | 87.1°F (2023) | 46.9°F (2024) | 1.25 in (1955) |
| August 23 | 93.9°F (2012) | 48.0°F (2024) | 5.50 in (2002) |
| August 24 | 95.0°F (2012) | 48.9°F (2018) | 2.05 in (2007) |
| August 25 | 95.0°F (2011) | 48.9°F (2015) | 1.45 in (1982) |
| August 26 | 93.0°F (2012) | 46.9°F (2025) | 3.32 in (1965) |
| August 27 | 91.9°F (2020) | 44.1°F (2025) | 1.75 in (2012) |
| August 28 | 93.9°F (2024) | 48.9°F (2025) | 1.32 in (2009) |
| August 29 | 91.0°F (2018) | 53.1°F (2023) | 1.55 in (2018) |
| August 30 | 90.0°F (2022) | 46.9°F (2009) | 2.60 in (1955) |
| August 31 | 93.0°F (2012) | 43.0°F (2009) | 2.13 in (1965) |