September weather in Kirby, WY
The average temperature in Kirby in September is 56.4°F (37.6°F–75.1°F). Average precipitation: 1.23 inches. Average snowfall is 0.3 inches.
September is a fall month in Kirby, and is warmer than the annual average of 42.6°F. Daily temperatures swing about 37.5°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 12h 17m. For travel, September is cool.
Avg High
75.1°F
Avg Low
37.6°F
Precipitation
1.23 in
Snow
0.3 in
September records in Kirby
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (2022) | 36.0°F (2020) | 0.80 in (1997) |
| September 2 | 98.1°F (2022) | 34.0°F (2006) | 0.96 in (2008) |
| September 3 | 95.0°F (2019) | 33.1°F (2006) | 0.72 in (1999) |
| September 4 | 99.0°F (2022) | 30.9°F (2010) | 0.53 in (1999) |
| September 5 | 102.0°F (2022) | 35.1°F (2006) | 0.76 in (2023) |
| September 6 | 98.1°F (2020) | 36.0°F (2011) | 0.38 in (2001) |
| September 7 | 91.9°F (2022) | 28.9°F (2010) | 0.04 in (2011) |
| September 8 | 99.0°F (2022) | 30.0°F (2010) | 0.66 in (2020) |
| September 9 | 91.9°F (2024) | 28.9°F (2020) | 0.19 in (2019) |
| September 10 | 95.0°F (2021) | 28.0°F (2020) | 1.20 in (2003) |
| September 11 | 90.0°F (2025) | 28.0°F (2007) | 0.15 in (2014) |
| September 12 | 90.0°F (2017) | 27.0°F (2014) | 1.16 in (2019) |
| September 13 | 90.0°F (2017) | 28.9°F (2012) | 1.18 in (1998) |
| September 14 | 88.0°F (2006) | 27.0°F (2012) | 0.18 in (2001) |
| September 15 | 88.0°F (2009) | 28.0°F (2012) | 0.73 in (2017) |
| September 16 | 88.0°F (2018) | 35.1°F (2008) | 0.60 in (2006) |
| September 17 | 87.1°F (2010) | 33.1°F (2017) | 0.60 in (1996) |
| September 18 | 84.9°F (2009) | 32.0°F (2011) | 0.72 in (2002) |
| September 19 | 84.0°F (2009) | 30.9°F (2015) | 0.44 in (1997) |
| September 20 | 88.0°F (2010) | 30.0°F (2017) | 1.08 in (1995) |
| September 21 | 88.0°F (2009) | 27.0°F (2011) | 0.21 in (2021) |
| September 22 | 82.9°F (2015) | 25.0°F (2009) | 1.68 in (2000) |
| September 23 | 87.1°F (2007) | 27.0°F (2011) | 0.84 in (2025) |
| September 24 | 84.9°F (2011) | 30.0°F (2008) | 0.31 in (2016) |
| September 25 | 88.0°F (2015) | 25.0°F (2009) | 1.06 in (2016) |
| September 26 | 90.0°F (2024) | 27.0°F (2018) | 0.33 in (2013) |
| September 27 | 93.0°F (2024) | 25.0°F (2018) | 1.09 in (2013) |
| September 28 | 90.0°F (2024) | 26.1°F (2013) | 0.28 in (2013) |
| September 29 | 89.1°F (2010) | 26.1°F (2018) | 0.80 in (2019) |
| September 30 | 91.0°F (2024) | 23.0°F (2021) | 0.40 in (1995) |