September weather in Grottoes, VA
The average temperature in Grottoes in September is 66.0°F (54.5°F–77.5°F). Average precipitation: 5.46 inches.
September is a fall month in Grottoes, and is warmer than the annual average of 54.1°F. Daily temperatures swing about 23°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 14m. For travel, September is a wet month.
Avg High
77.5°F
Avg Low
54.5°F
Precipitation
5.46 in
Daylight
12h 14m
September records in Grottoes
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.9°F (2010) | 48.0°F (2023) | 1.94 in (2020) |
| September 2 | 91.0°F (2010) | 46.9°F (2009) | 3.53 in (2006) |
| September 3 | 91.9°F (2015) | 46.0°F (2009) | 1.75 in (2015) |
| September 4 | 95.0°F (2023) | 46.0°F (2009) | 0.30 in (2001) |
| September 5 | 96.1°F (2023) | 48.0°F (2009) | 1.60 in (2011) |
| September 6 | 97.0°F (2023) | 46.9°F (2010) | 2.30 in (2011) |
| September 7 | 96.1°F (2023) | 46.9°F (2010) | 1.25 in (2004) |
| September 8 | 93.0°F (2023) | 43.0°F (2024) | 4.24 in (2004) |
| September 9 | 93.0°F (2016) | 43.0°F (2024) | 1.53 in (2018) |
| September 10 | 93.0°F (2016) | 42.1°F (2017) | 1.80 in (2007) |
| September 11 | 91.0°F (2016) | 42.1°F (2017) | 0.68 in (2023) |
| September 12 | 95.0°F (2019) | 45.0°F (2003) | 0.10 in (2010) |
| September 13 | 91.9°F (2019) | 45.0°F (2002) | 0.80 in (2003) |
| September 14 | 91.9°F (2019) | 37.9°F (2001) | 0.58 in (2003) |
| September 15 | 91.0°F (2016) | 37.9°F (2001) | 0.21 in (2018) |
| September 16 | 86.0°F (2010) | 37.9°F (2011) | 0.42 in (2018) |
| September 17 | 91.0°F (2019) | 41.0°F (2007) | 1.88 in (2004) |
| September 18 | 84.9°F (2005) | 41.0°F (2013) | 2.70 in (2024) |
| September 19 | 87.1°F (2021) | 41.0°F (2013) | 6.11 in (2003) |
| September 20 | 87.1°F (2021) | 36.0°F (2020) | 1.40 in (2016) |
| September 21 | 86.0°F (2022) | 35.1°F (2020) | 0.49 in (2025) |
| September 22 | 88.0°F (2019) | 37.0°F (2020) | 1.18 in (2021) |
| September 23 | 91.0°F (2010) | 36.0°F (2020) | 3.28 in (2021) |
| September 24 | 91.9°F (2010) | 42.1°F (2012) | 1.92 in (2023) |
| September 25 | 91.0°F (2010) | 37.9°F (2001) | 0.53 in (2024) |
| September 26 | 89.1°F (2010) | 37.9°F (2001) | 2.42 in (2024) |
| September 27 | 88.0°F (2019) | 39.9°F (2001) | 2.22 in (2008) |
| September 28 | 87.1°F (2017) | 37.0°F (2022) | 3.74 in (2004) |
| September 29 | 91.0°F (2019) | 37.9°F (2001) | 2.56 in (2016) |
| September 30 | 90.0°F (2019) | 36.0°F (2001) | 4.98 in (2010) |