September weather in Greybull, WY
The average temperature in Greybull in September is 59.5°F (42.1°F–76.9°F). Average precipitation: 0.99 inches. Average snowfall is 0.2 inches.
September is a fall month in Greybull, and is warmer than the annual average of 45°F. Daily temperatures swing about 34.8°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 12h 17m. For travel, September is a comfortable month to visit.
Avg High
76.9°F
Avg Low
42.1°F
Precipitation
0.99 in
Snow
0.2 in
September records in Greybull
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 99.0°F (2016) | 42.1°F (2003) | 0.43 in (1973) |
| September 2 | 99.0°F (1976) | 35.1°F (2006) | 0.53 in (2008) |
| September 3 | 98.1°F (2015) | 34.0°F (2010) | 0.42 in (1999) |
| September 4 | 97.0°F (2001) | 36.0°F (2006) | 0.19 in (2013) |
| September 5 | 95.0°F (1991) | 37.0°F (1989) | 0.24 in (2016) |
| September 6 | 97.0°F (2013) | 36.0°F (1994) | 0.74 in (2001) |
| September 7 | 95.0°F (1998) | 30.0°F (2010) | 0.23 in (2008) |
| September 8 | 95.0°F (1998) | 32.0°F (2010) | 0.80 in (1973) |
| September 9 | 95.0°F (1991) | 34.0°F (1999) | 0.50 in (2002) |
| September 10 | 91.9°F (2005) | 33.1°F (1992) | 0.65 in (1961) |
| September 11 | 91.9°F (2012) | 28.9°F (1989) | 0.52 in (1978) |
| September 12 | 95.0°F (1990) | 28.9°F (1989) | 0.75 in (1978) |
| September 13 | 95.0°F (1990) | 28.9°F (1989) | 0.63 in (1998) |
| September 14 | 95.0°F (1990) | 26.1°F (1993) | 0.50 in (1991) |
| September 15 | 95.0°F (2000) | 28.9°F (1989) | 0.80 in (1994) |
| September 16 | 93.9°F (2000) | 34.0°F (2004) | 1.15 in (1980) |
| September 17 | 91.0°F (2018) | 30.9°F (1992) | 0.48 in (2006) |
| September 18 | 91.9°F (1998) | 27.0°F (2003) | 0.46 in (1978) |
| September 19 | 89.1°F (2004) | 28.0°F (2003) | 0.90 in (1985) |
| September 20 | 93.9°F (2010) | 30.0°F (1991) | 1.56 in (2004) |
| September 21 | 86.0°F (2005) | 28.0°F (1995) | 0.28 in (1961) |
| September 22 | 87.1°F (2013) | 26.1°F (1995) | 0.42 in (1965) |
| September 23 | 91.0°F (1992) | 28.0°F (2000) | 0.70 in (1984) |
| September 24 | 91.0°F (1992) | 27.0°F (2000) | 1.38 in (2016) |
| September 25 | 91.0°F (2001) | 26.1°F (2000) | 0.38 in (1986) |
| September 26 | 93.0°F (2014) | 30.0°F (2000) | 0.21 in (2013) |
| September 27 | 96.1°F (2015) | 24.1°F (1996) | 0.55 in (2013) |
| September 28 | 91.0°F (2001) | 28.0°F (1999) | 0.22 in (1982) |
| September 29 | 91.0°F (2010) | 26.1°F (1999) | 0.18 in (1995) |
| September 30 | 89.1°F (1987) | 30.0°F (1988) | 0.46 in (1995) |