September weather in Jamestown, IN
The average temperature in Jamestown in September is 65.6°F (54.2°F–77.0°F). Average precipitation: 3.33 inches.
September is a fall month in Jamestown, and is warmer than the annual average of 51.2°F. Daily temperatures swing about 22.8°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 15m. For travel, September is one of the best months of the year to visit.
Avg High
77.0°F
Avg Low
54.2°F
Precipitation
3.33 in
Daylight
12h 15m
September records in Jamestown
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.0°F (2013) | 48.9°F (2023) | 6.00 in (2003) |
| September 2 | 95.0°F (2011) | 46.9°F (1994) | 1.00 in (2003) |
| September 3 | 95.0°F (2011) | 33.1°F (1994) | 2.08 in (2012) |
| September 4 | 95.0°F (2011) | 42.1°F (1997) | 0.89 in (2000) |
| September 5 | 93.0°F (1999) | 45.0°F (2010) | 0.73 in (2008) |
| September 6 | 93.9°F (2007) | 44.1°F (2010) | 0.75 in (1958) |
| September 7 | 93.9°F (2007) | 45.0°F (2011) | 0.60 in (1992) |
| September 8 | 93.9°F (2007) | 41.0°F (2024) | 2.83 in (2012) |
| September 9 | 90.0°F (2002) | 37.9°F (2024) | 1.90 in (1997) |
| September 10 | 90.0°F (1991) | 44.1°F (2024) | 1.20 in (2001) |
| September 11 | 89.1°F (2002) | 42.1°F (1993) | 0.89 in (2016) |
| September 12 | 88.0°F (1999) | 44.1°F (2007) | 0.78 in (2022) |
| September 13 | 96.1°F (1991) | 45.0°F (1993) | 0.82 in (1993) |
| September 14 | 97.0°F (1991) | 39.9°F (1996) | 2.23 in (1965) |
| September 15 | 95.0°F (1991) | 39.0°F (2007) | 1.43 in (1993) |
| September 16 | 93.9°F (1991) | 39.9°F (2011) | 2.03 in (1969) |
| September 17 | 89.1°F (1991) | 42.1°F (2011) | 2.40 in (2016) |
| September 18 | 88.0°F (2017) | 42.1°F (1999) | 0.90 in (2006) |
| September 19 | 89.1°F (2018) | 37.0°F (1991) | 1.63 in (1966) |
| September 20 | 96.1°F (2002) | 34.0°F (1991) | 2.15 in (2002) |
| September 21 | 91.0°F (2004) | 34.0°F (1991) | 5.00 in (1992) |
| September 22 | 91.9°F (2010) | 34.0°F (1999) | 1.80 in (2003) |
| September 23 | 91.9°F (2017) | 34.0°F (1999) | 1.15 in (1955) |
| September 24 | 91.9°F (2010) | 30.9°F (1995) | 1.93 in (1994) |
| September 25 | 91.0°F (2017) | 30.9°F (1995) | 2.38 in (1961) |
| September 26 | 90.0°F (2017) | 36.0°F (1991) | 2.34 in (2005) |
| September 27 | 90.0°F (2017) | 34.0°F (1991) | 1.68 in (1955) |
| September 28 | 91.0°F (1998) | 39.0°F (2022) | 0.32 in (2006) |
| September 29 | 97.0°F (2002) | 32.0°F (1992) | 2.65 in (1955) |
| September 30 | 82.9°F (1998) | 30.9°F (1993) | 0.60 in (1961) |