Jackson Hole, Wyoming weather in September
Temperature, rain and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Excellent
Best time to visit: June – September
Best for skiing: December – April
What is the weather like in Jackson Hole, Wyoming in September?
In September, Jackson Hole, Wyoming is mild: daytime highs average 20 °C, and nights cool down to about 6 °C. The sun shines for around 8 hours a day. Rain falls on about 7 days, adding up to 44 mm. All in all, September is an excellent month for a holiday in Jackson Hole, Wyoming.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 90 | 89 | 50 |
| Day | 26° | 20° | 11° |
| Night | 11° | 6° | −1° |
| Sun | 9 h | 8 h | 6 h |
| Rain days | 6 | 7 | 10 |
More details for September
- Daylight
- 12 h 35 min07:01 – 19:36
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 13 km/haverage daily peakAll months
- Cloud cover
- 37 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 1 day1 cm or more of fresh snowAll months
- Time zone
- UTC−6America/Denver
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %77 %
- Few rainy daysweight 30 %79 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Mountain air”.
What to pack in September
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
Jackson Hole, Wyoming in September: quick answers
Is Jackson Hole, Wyoming hot in September?
No. In September, Jackson Hole, Wyoming is mild: daytime highs average 20 °C and nights drop to about 6 °C.
Does it rain much in Jackson Hole, Wyoming in September?
Rain falls on about 7 days, adding up to 44 mm.
Jackson Hole, Wyoming month by month
The whole year in Jackson Hole, WyomingAll destinations: USAWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences