Kalispell weather in September 2025

The temperatures in Kalispell in September are quite cold with temperatures between 7°C and 21°C, warm clothes are a must.

You can expect about 3 to 8 days of rain in Kalispell during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Our weather forecast can give you a great sense of what weather to expect in Kalispell in September 2025.

If you’re planning to visit Kalispell in the near future, we highly recommend that you review the 14 day weather forecast for Kalispell before you arrive.

Temperatures

21° / 7°

Rainy Days

Snowy Days

Dry Days

Rainfall

Sun Hours

8.4

Hrs

Sun	Mon	Tue	Wed	Thu	Fri	Sat
	1 29° /9°	2 30° /11°	3 23° /13°	4 22° /10°	5 26° /10°	6 28° /10°
7 28° /9°	8 28° /10°	9 27° /10°	10 26° /9°	11 24° /8°	12 23° /11°	13 21° /10°
14 22° /8°	15 23° /8°	16 24° /7°	17 22° /9°	18 20° /8°	19 20° /7°	20 17° /5°
21 17° /2°	22 17° /6°	23 18° /7°	24 21° /6°	25 24° /8°	26 20° /7°	27 21° /5°
28 23° /7°	29 15° /5°	30 12° /4°

Explore the weather in Kalispell in other months

Kalispell annual weather

Month	Temperatures	Rainy Days	Dry Days	Snowy Days	Rainfall	Weather	More details
January	-3° / -10°	12	12	7	56 mm	Awful	Kalispell in January
February	-2° / -10°	14	8	7	55 mm	Awful	Kalispell in February
March	4° / -5°	14	12	7	63 mm	Awful	Kalispell in March
April	9° / -2°	13	13	4	68 mm	Awful	Kalispell in April
May	17° / 3°	10	21	0	69 mm	Ok	Kalispell in May
June	21° / 7°	9	21	0	78 mm	Ok	Kalispell in June
July	27° / 11°	5	26	0	17 mm	Perfect	Kalispell in July
August	27° / 11°	4	27	0	31 mm	Perfect	Kalispell in August
September	21° / 7°	5	25	0	41 mm	Good	Kalispell in September
October	10° / 1°	9	20	2	70 mm	Awful	Kalispell in October
November	1° / -5°	14	10	7	66 mm	Awful	Kalispell in November
December	-4° / -10°	16	8	8	66 mm	Awful	Kalispell in December

Temperatures in Kalispell in September

Rain in Kalispell in September

Weather in Kalispell in September - FAQ

What is the average temperature in Kalispell in September?

The average temperature in Kalispell in September is 7/21° C.

What is the chance of rain in Kalispell in September?

On average, there are 5 rainy days in Kalispell during September.

Weather wise, is September a good time to visit Kalispell?

The weather in Kalispell in September is good.

Can it snow in Kalispell in September?

On average, there are 0 snowy days in Kalispell in September.

More about the weather in Kalispell