August weather in Decatur, AL
The average temperature in Decatur in August is 78.6°F (68.4°F–88.9°F). Average precipitation: 3.88 inches.
August is a summer month in Decatur, and is warmer than the annual average of 61.4°F. Daily temperatures swing about 20.5°F between overnight low and afternoon high. Daylight averages about 13h 18m. For travel, August is hot.
Avg High
88.9°F
Avg Low
68.4°F
Precipitation
3.88 in
Daylight
13h 18m
August records in Decatur
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 93.9°F (1999) | 64.9°F (2018) | 1.85 in (2013) |
| August 2 | 97.0°F (2010) | 64.9°F (2018) | 0.75 in (2009) |
| August 3 | 97.0°F (2010) | 63.0°F (2015) | 0.80 in (2003) |
| August 4 | 98.1°F (2011) | 64.0°F (2021) | 3.65 in (2023) |
| August 5 | 97.0°F (2006) | 64.9°F (2018) | 0.37 in (2012) |
| August 6 | 99.0°F (2010) | 64.0°F (2004) | 1.48 in (2005) |
| August 7 | 98.1°F (2015) | 57.9°F (2004) | 2.80 in (2015) |
| August 8 | 96.1°F (2006) | 64.0°F (2004) | 0.72 in (2019) |
| August 9 | 98.1°F (2007) | 63.0°F (2008) | 0.22 in (2023) |
| August 10 | 98.1°F (2000) | 66.0°F (2008) | 1.90 in (2001) |
| August 11 | 98.1°F (2010) | 63.0°F (2024) | 1.42 in (2004) |
| August 12 | 97.0°F (2010) | 60.1°F (2012) | 0.30 in (2008) |
| August 13 | 98.1°F (2007) | 55.9°F (2004) | 0.45 in (1999) |
| August 14 | 98.1°F (2007) | 55.9°F (2004) | 2.00 in (2011) |
| August 15 | 100.9°F (2007) | 57.9°F (2004) | 1.85 in (2023) |
| August 16 | 100.0°F (2007) | 57.9°F (2004) | 0.90 in (2021) |
| August 17 | 100.9°F (2000) | 63.0°F (2004) | 1.09 in (2012) |
| August 18 | 98.1°F (2024) | 62.1°F (2004) | 1.84 in (2009) |
| August 19 | 98.1°F (1999) | 66.0°F (2013) | 0.63 in (2016) |
| August 20 | 96.1°F (2025) | 61.0°F (2012) | 1.18 in (2020) |
| August 21 | 95.0°F (2005) | 57.9°F (2024) | 0.82 in (2004) |
| August 22 | 99.0°F (2007) | 57.9°F (2024) | 1.08 in (2011) |
| August 23 | 100.0°F (2007) | 61.0°F (2009) | 0.45 in (2015) |
| August 24 | 98.1°F (2007) | 62.1°F (2018) | 1.07 in (2008) |
| August 25 | 95.0°F (2023) | 61.0°F (2015) | 1.84 in (2008) |
| August 26 | 97.0°F (2023) | 60.1°F (2015) | 2.25 in (2020) |
| August 27 | 95.0°F (2023) | 57.0°F (2025) | 1.26 in (2016) |
| August 28 | 96.1°F (2024) | 60.1°F (2015) | 1.17 in (2004) |
| August 29 | 99.0°F (2000) | 60.1°F (2025) | 0.90 in (2020) |
| August 30 | 96.1°F (2000) | 60.1°F (2025) | 1.30 in (2005) |
| August 31 | 91.9°F (2000) | 60.1°F (2025) | 2.10 in (2021) |