Whitefish (Glacier National Park) 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: May – September
Best for skiing: December – March
What is the weather like in Whitefish (Glacier National Park) in September?
In September, Whitefish (Glacier National Park) is mild: daytime highs average 20 °C, and nights cool down to about 9 °C. The sun shines for around 8 hours a day. Rain falls on about 7 days, adding up to 45 mm. All in all, September is an excellent month for a holiday in Whitefish (Glacier National Park).
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 87 | 89 | 48 |
| Day | 27° | 20° | 11° |
| Night | 13° | 9° | 3° |
| Sun | 10 h | 8 h | 5 h |
| Rain days | 5 | 7 | 11 |
More details for September
- Daylight
- 12 h 40 min07:13 – 19:53
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 10 km/haverage daily peakAll months
- Cloud cover
- 46 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−6America/Denver
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %75 %
- 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
- A jumper for the evenings
Whitefish (Glacier National Park) in September: quick answers
Is Whitefish (Glacier National Park) hot in September?
No. In September, Whitefish (Glacier National Park) is mild: daytime highs average 20 °C and nights drop to about 9 °C. On about 1 days the thermometer climbs to 30 °C or more.
Does it rain much in Whitefish (Glacier National Park) in September?
Rain falls on about 7 days, adding up to 45 mm.
Whitefish (Glacier National Park) month by month
The whole year in Whitefish (Glacier National Park)All 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