September weather in Helena, OH
The average temperature in Helena in September is 64.5°F (53.6°F–75.4°F). Average precipitation: 3.00 inches.
September is a fall month in Helena, and is warmer than the annual average of 50.9°F. Daily temperatures swing about 21.8°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 16m. For travel, September is one of the best months of the year to visit.
Avg High
75.4°F
Avg Low
53.6°F
Precipitation
3.00 in
Daylight
12h 16m
September records in Helena
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.0°F (2010) | 42.1°F (1999) | 1.05 in (2003) |
| September 2 | 93.0°F (2008) | 44.1°F (1999) | 0.70 in (2003) |
| September 3 | 93.9°F (2008) | 44.1°F (1999) | 0.33 in (2006) |
| September 4 | 91.0°F (2008) | 37.9°F (1997) | 0.42 in (2011) |
| September 5 | 90.0°F (1999) | 41.0°F (1997) | 0.06 in (2008) |
| September 6 | 89.1°F (2007) | 42.1°F (2003) | 0.02 in (2007) |
| September 7 | 93.0°F (1998) | 44.1°F (2003) | 2.07 in (2011) |
| September 8 | 90.0°F (2001) | 46.0°F (1998) | 1.66 in (2011) |
| September 9 | 93.9°F (2002) | 43.0°F (1998) | 0.59 in (2007) |
| September 10 | 93.0°F (2002) | 41.0°F (1999) | 1.44 in (2001) |
| September 11 | 91.0°F (2002) | 43.0°F (1998) | 1.56 in (2000) |
| September 12 | 86.0°F (2005) | 43.0°F (2002) | 1.89 in (2008) |
| September 13 | 90.0°F (1999) | 44.1°F (2002) | 1.79 in (2008) |
| September 14 | 90.0°F (1998) | 39.9°F (1999) | 0.26 in (2001) |
| September 15 | 88.0°F (1998) | 39.0°F (2001) | 1.21 in (2002) |
| September 16 | 84.0°F (2004) | 37.9°F (2001) | 0.77 in (2010) |
| September 17 | 82.9°F (1997) | 39.9°F (1999) | 0.12 in (1997) |
| September 18 | 84.0°F (2006) | 37.0°F (1999) | 0.02 in (2001) |
| September 19 | 87.1°F (2007) | 42.1°F (2004) | 0.77 in (2006) |
| September 20 | 87.1°F (1998) | 39.0°F (2004) | 1.86 in (1997) |
| September 21 | 91.9°F (2010) | 32.0°F (2006) | 1.11 in (2000) |
| September 22 | 84.9°F (2005) | 30.0°F (1999) | 0.47 in (2001) |
| September 23 | 93.0°F (2010) | 30.9°F (1999) | 1.25 in (2005) |
| September 24 | 91.0°F (2007) | 39.0°F (1997) | 1.44 in (2000) |
| September 25 | 91.0°F (2007) | 35.1°F (2006) | 0.15 in (1999) |
| September 26 | 82.0°F (1998) | 36.0°F (2006) | 1.77 in (2005) |
| September 27 | 91.9°F (1998) | 35.1°F (1997) | 0.71 in (2003) |
| September 28 | 87.1°F (1999) | 35.1°F (1997) | 0.93 in (2010) |
| September 29 | 88.0°F (1999) | 30.0°F (2006) | 0.41 in (2011) |
| September 30 | 82.9°F (1998) | 33.1°F (2006) | 0.78 in (1999) |