Kalispell in September
7.8out of 10
Yes, a good time to go
Mild: highs around 20°C. Some rain: about 8 rainy days.
20°CAvg high
6°CAvg low
8Rainy days (46 mm)
12:20 hDaylight
07:22Sunrise · 19:41 Sunset
Why this score
- Mild: highs around 20°C
- Some rain: about 8 rainy days
What to wear and pack
- Layers you can add or remove
- A light jacket for cooler evenings
- Comfortable walking shoes
How reliable is the forecast?
Rain in September varies a lot between years (±3.9 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -1°C | -8°C | 69 mm | 14 | – | – | 3.2 |
| February | 1°C | -8°C | 53 mm | 11 | – | – | 3.6 |
| March | 6°C | -4°C | 67 mm | 14 | – | – | 4.1 |
| April | 11°C | -1°C | 69 mm | 14 | – | – | 5.2 |
| May | 17°C | 4°C | 76 mm | 14 | – | – | 6.4 |
| June | 21°C | 7°C | 90 mm | 13 | – | – | 7.1 |
| July | 26°C | 10°C | 30 mm | 6 | – | – | 8.3 |
| August | 27°C | 10°C | 29 mm | 5 | – | – | 8.4 |
| September | 20°C | 6°C | 46 mm | 8 | – | – | 7.8 |
| October | 11°C | 1°C | 67 mm | 11 | – | – | 5.8 |
| November | 4°C | -3°C | 75 mm | 14 | – | – | 3.9 |
| December | -1°C | -7°C | 69 mm | 13 | – | – | 3.3 |
Frequently asked questions
How hot is Kalispell in September?
Daytime highs average 20°C and nights about 6°C.
When is the best time to visit Kalispell?
The best months are August, July.