September weather in Grantsville, MD
The average temperature in Grantsville in September is 60.4°F (47.7°F–73.2°F). Average precipitation: 3.62 inches.
September is a fall month in Grantsville, and is warmer than the annual average of 47.1°F. Daily temperatures swing about 25.5°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 12h 15m. For travel, September is a comfortable month to visit.
Avg High
73.2°F
Avg Low
47.7°F
Precipitation
3.62 in
Daylight
12h 15m
September records in Grantsville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 88.0°F (2010) | 37.9°F (2009) | 1.05 in (1994) |
| September 2 | 89.1°F (2010) | 36.0°F (2009) | 1.90 in (2006) |
| September 3 | 88.0°F (2010) | 36.0°F (2009) | 1.43 in (1969) |
| September 4 | 90.0°F (2011) | 37.9°F (2009) | 1.28 in (1981) |
| September 5 | 87.1°F (2018) | 39.9°F (2009) | 1.58 in (1980) |
| September 6 | 87.1°F (2018) | 35.1°F (2010) | 1.26 in (1979) |
| September 7 | 88.0°F (2007) | 34.0°F (2010) | 4.73 in (1996) |
| September 8 | 87.1°F (2007) | 41.0°F (2005) | 0.84 in (1987) |
| September 9 | 88.0°F (2015) | 41.0°F (2005) | 2.94 in (2004) |
| September 10 | 87.1°F (2002) | 37.0°F (2017) | 2.71 in (2018) |
| September 11 | 88.0°F (2002) | 35.1°F (2010) | 0.59 in (2015) |
| September 12 | 86.0°F (2013) | 34.0°F (2010) | 1.19 in (1971) |
| September 13 | 86.0°F (2005) | 36.0°F (2002) | 1.96 in (1990) |
| September 14 | 86.0°F (2005) | 36.0°F (2002) | 2.15 in (1971) |
| September 15 | 84.0°F (2008) | 35.1°F (2001) | 1.02 in (1973) |
| September 16 | 87.1°F (2005) | 33.1°F (2001) | 1.30 in (1981) |
| September 17 | 84.9°F (2005) | 33.1°F (2007) | 1.80 in (1996) |
| September 18 | 82.9°F (2015) | 34.0°F (2013) | 3.68 in (2004) |
| September 19 | 82.9°F (2015) | 34.0°F (2013) | 3.51 in (2003) |
| September 20 | 84.9°F (2015) | 35.1°F (2012) | 0.83 in (1966) |
| September 21 | 82.9°F (2002) | 35.1°F (2012) | 0.67 in (1966) |
| September 22 | 82.9°F (2018) | 36.0°F (2006) | 1.50 in (1998) |
| September 23 | 84.9°F (2010) | 35.1°F (2014) | 0.78 in (1973) |
| September 24 | 84.0°F (2010) | 33.1°F (2013) | 0.54 in (1986) |
| September 25 | 86.0°F (2010) | 30.0°F (2012) | 0.95 in (1986) |
| September 26 | 84.9°F (2007) | 30.0°F (2012) | 1.50 in (2000) |
| September 27 | 84.0°F (2017) | 37.9°F (2013) | 1.54 in (2002) |
| September 28 | 82.9°F (2017) | 37.0°F (2005) | 1.81 in (2018) |
| September 29 | 84.9°F (2019) | 36.0°F (2013) | 1.72 in (1964) |
| September 30 | 80.1°F (2019) | 30.0°F (2005) | 2.78 in (2015) |