September weather in Guernsey, WY
The average temperature in Guernsey in September is 62.8°F (47.6°F–77.9°F). Average precipitation: 1.20 inches.
September is a fall month in Guernsey, and is warmer than the annual average of 48.7°F. Daily temperatures swing about 30.3°F between overnight low and afternoon high. Daylight averages about 12h 16m. For travel, September is a comfortable month to visit.
Avg High
77.9°F
Avg Low
47.6°F
Precipitation
1.20 in
Daylight
12h 16m
September records in Guernsey
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 95.0°F (2012) | 50.0°F (2014) | 0.01 in (2012) |
| September 2 | 93.9°F (2015) | 44.1°F (2014) | 0.20 in (2013) |
| September 3 | 95.0°F (2014) | 55.0°F (2014) | 0.28 in (2016) |
| September 4 | 97.0°F (2013) | 52.0°F (2017) | 0.15 in (2016) |
| September 5 | 93.9°F (2013) | 48.0°F (2017) | 0.00 in (2012) |
| September 6 | 93.9°F (2013) | 42.1°F (2017) | 0.08 in (2016) |
| September 7 | 93.0°F (2013) | 48.0°F (2014) | 0.06 in (2012) |
| September 8 | 93.0°F (2013) | 46.0°F (2012) | 0.00 in (2012) |
| September 9 | 91.9°F (2012) | 43.0°F (2012) | 0.12 in (2014) |
| September 10 | 96.1°F (2012) | 39.0°F (2016) | 0.02 in (2014) |
| September 11 | 91.0°F (2017) | 33.1°F (2014) | 0.83 in (2013) |
| September 12 | 91.9°F (2017) | 33.1°F (2014) | 0.02 in (2012) |
| September 13 | 91.0°F (2015) | 30.9°F (2014) | 0.28 in (2013) |
| September 14 | 91.0°F (2015) | 37.9°F (2014) | 0.20 in (2013) |
| September 15 | 88.0°F (2012) | 39.0°F (2014) | 0.34 in (2017) |
| September 16 | 88.0°F (2014) | 41.0°F (2016) | 0.00 in (2012) |
| September 17 | 89.1°F (2013) | 37.0°F (2017) | 0.06 in (2014) |
| September 18 | 93.0°F (2014) | 43.0°F (2012) | 0.24 in (2015) |
| September 19 | 89.1°F (2016) | 42.1°F (2015) | 0.00 in (2012) |
| September 20 | 91.9°F (2016) | 39.0°F (2013) | 0.00 in (2012) |
| September 21 | 88.0°F (2013) | 43.0°F (2013) | 0.00 in (2012) |
| September 22 | 82.0°F (2013) | 42.1°F (2012) | 0.12 in (2017) |
| September 23 | 81.0°F (2012) | 42.1°F (2017) | 0.44 in (2017) |
| September 24 | 87.1°F (2014) | 39.9°F (2013) | 0.32 in (2017) |
| September 25 | 93.0°F (2014) | 39.9°F (2016) | 0.03 in (2017) |
| September 26 | 93.0°F (2014) | 37.9°F (2017) | 0.00 in (2012) |
| September 27 | 90.0°F (2015) | 37.0°F (2013) | 0.11 in (2013) |
| September 28 | 81.0°F (2016) | 33.1°F (2013) | 0.29 in (2014) |
| September 29 | 82.9°F (2016) | 46.0°F (2012) | 0.82 in (2014) |
| September 30 | 81.0°F (2015) | 46.0°F (2017) | 0.31 in (2014) |