September weather in Brownsburg, IN
The average temperature in Brownsburg in September is 67.6°F (57.1°F–78.1°F). Average precipitation: 2.57 inches.
September is a fall month in Brownsburg, and is warmer than the annual average of 53.7°F. Daily temperatures swing about 21°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 15m. For travel, September is one of the best months of the year to visit.
Avg High
78.1°F
Avg Low
57.1°F
Precipitation
2.57 in
Daylight
12h 15m
September records in Brownsburg
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (2011) | 52.0°F (2009) | 1.37 in (2003) |
| September 2 | 97.0°F (2011) | 53.1°F (2009) | 1.20 in (2012) |
| September 3 | 97.0°F (2011) | 53.1°F (2024) | 0.21 in (2003) |
| September 4 | 93.9°F (1999) | 45.0°F (1997) | 0.80 in (2022) |
| September 5 | 93.9°F (2007) | 46.9°F (1997) | 0.50 in (2023) |
| September 6 | 93.0°F (1998) | 48.9°F (2011) | 0.21 in (2018) |
| September 7 | 93.0°F (2002) | 48.0°F (2017) | 2.44 in (2012) |
| September 8 | 93.9°F (2002) | 45.0°F (2024) | 1.42 in (2018) |
| September 9 | 93.0°F (2002) | 46.9°F (2024) | 1.56 in (2001) |
| September 10 | 95.0°F (2013) | 48.0°F (1999) | 2.21 in (2014) |
| September 11 | 91.9°F (2013) | 50.0°F (2017) | 0.38 in (2022) |
| September 12 | 91.0°F (2019) | 51.1°F (1997) | 0.77 in (2006) |
| September 13 | 89.1°F (1998) | 46.9°F (2014) | 0.24 in (2020) |
| September 14 | 90.0°F (1998) | 45.0°F (1996) | 0.50 in (2021) |
| September 15 | 89.1°F (2024) | 44.1°F (2007) | 0.78 in (2005) |
| September 16 | 89.1°F (2024) | 43.0°F (2011) | 0.54 in (2016) |
| September 17 | 90.0°F (2017) | 46.0°F (2014) | 1.11 in (2016) |
| September 18 | 91.0°F (2018) | 46.9°F (1999) | 0.81 in (2001) |
| September 19 | 91.0°F (2024) | 41.0°F (2012) | 2.86 in (2011) |
| September 20 | 91.0°F (2018) | 45.0°F (2003) | 2.03 in (2002) |
| September 21 | 93.9°F (2024) | 42.1°F (2006) | 1.42 in (2012) |
| September 22 | 93.9°F (2017) | 41.0°F (1999) | 0.64 in (2006) |
| September 23 | 91.9°F (2010) | 43.0°F (1999) | 0.42 in (2019) |
| September 24 | 91.0°F (2007) | 37.0°F (2012) | 0.48 in (2009) |
| September 25 | 91.0°F (2017) | 42.1°F (2001) | 2.21 in (2005) |
| September 26 | 91.0°F (2017) | 42.1°F (2000) | 1.07 in (2003) |
| September 27 | 89.1°F (1998) | 42.1°F (2000) | 1.35 in (2024) |
| September 28 | 89.1°F (1999) | 44.1°F (2022) | 0.55 in (2016) |
| September 29 | 89.1°F (2025) | 42.1°F (2000) | 0.72 in (2013) |
| September 30 | 90.0°F (2019) | 39.0°F (2003) | 0.13 in (2016) |