Montana weather in August 2025

The temperatures in Montana in August are comfortable with low of 15°C and and high up to 29°C.

You can expect up to 3 rainy days in Montana during the month of August.

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

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

Temperatures

29° / 15°

Rainy Days

Snowy Days

Dry Days

Rainfall

Sun Hours

11.7

Hrs

Sun	Mon	Tue	Wed	Thu	Fri	Sat
					1 35° /18°	2 34° /19°
3 33° /18°	4 32° /18°	5 30° /16°	6 30° /16°	7 27° /15°	8 31° /14°	9 28° /15°
10 30° /14°	11 31° /15°	12 31° /16°	13 30° /15°	14 31° /14°	15 32° /16°	16 33° /16°
17 32° /17°	18 31° /16°	19 29° /15°	20 28° /15°	21 31° /15°	22 32° /16°	23 31° /15°
24 31° /16°	25 27° /15°	26 27° /14°	27 29° /14°	28 28° /14°	29 30° /13°	30 28° /14°
31 30° /13°

Explore the weather in Montana in other months

Montana annual weather

Month	Temperatures	Rainy Days	Dry Days	Snowy Days	Rainfall	Weather	More details
January	0° / -8°	4	13	14	31 mm	Awful	Montana in January
February	0° / -9°	4	10	15	37 mm	Awful	Montana in February
March	8° / -3°	5	15	11	51 mm	Bad	Montana in March
April	12° / 1°	6	17	7	74 mm	Bad	Montana in April
May	18° / 6°	8	22	1	92 mm	Ok	Montana in May
June	25° / 10°	5	25	0	62 mm	Perfect	Montana in June
July	31° / 15°	2	29	0	29 mm	Good	Montana in July
August	29° / 15°	2	29	0	42 mm	Good	Montana in August
September	24° / 10°	2	28	0	34 mm	Perfect	Montana in September
October	14° / 3°	3	24	4	57 mm	Ok	Montana in October
November	7° / -3°	4	18	8	31 mm	Bad	Montana in November
December	0° / -8°	5	11	14	28 mm	Awful	Montana in December