Montana weather by month

Check out Montana weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum daytime temperature °C
-1°C maximum daytime temperature in January in Helena-1
3°C maximum daytime temperature in February in Helena3
6°C maximum daytime temperature in March in Helena6
12°C maximum daytime temperature in April in Helena12
18°C maximum daytime temperature in May in Helena18
23°C maximum daytime temperature in June in Helena23
28°C maximum daytime temperature in July in Helena28
28°C maximum daytime temperature in August in Helena28
20°C maximum daytime temperature in September in Helena20
14°C maximum daytime temperature in October in Helena14
5°C maximum daytime temperature in November in Helena5
-0°C maximum daytime temperature in December in Helena-0
Hours of sunshine (daily)
Days with some rainfall
9 days with some rainfall in January in Helena9
7 days with some rainfall in February in Helena7
10 days with some rainfall in March in Helena10
9 days with some rainfall in April in Helena9
11 days with some rainfall in May in Helena11
10 days with some rainfall in June in Helena10
7 days with some rainfall in July in Helena7
8 days with some rainfall in August in Helena8
7 days with some rainfall in September in Helena7
6 days with some rainfall in October in Helena6
8 days with some rainfall in November in Helena8
9 days with some rainfall in December in Helena9

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Montana by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Montana (Helena) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Montana temperature by month

Compare the average temperature by month for popular destinations in Montana. Select a place from below to see more long term weather averages by month.

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Billings
0°C maximum daytime temperature in January in Billings0
4°C maximum daytime temperature in February in Billings4
8°C maximum daytime temperature in March in Billings8
14°C maximum daytime temperature in April in Billings14
20°C maximum daytime temperature in May in Billings20
26°C maximum daytime temperature in June in Billings26
31°C maximum daytime temperature in July in Billings31
30°C maximum daytime temperature in August in Billings30
22°C maximum daytime temperature in September in Billings22
16°C maximum daytime temperature in October in Billings16
7°C maximum daytime temperature in November in Billings7
1°C maximum daytime temperature in December in Billings1
Bozeman
-1°C maximum daytime temperature in January in Bozeman-1
2°C maximum daytime temperature in February in Bozeman2
6°C maximum daytime temperature in March in Bozeman6
12°C maximum daytime temperature in April in Bozeman12
18°C maximum daytime temperature in May in Bozeman18
23°C maximum daytime temperature in June in Bozeman23
28°C maximum daytime temperature in July in Bozeman28
27°C maximum daytime temperature in August in Bozeman27
20°C maximum daytime temperature in September in Bozeman20
14°C maximum daytime temperature in October in Bozeman14
5°C maximum daytime temperature in November in Bozeman5
0°C maximum daytime temperature in December in Bozeman0
Great Falls
-2°C maximum daytime temperature in January in Great Falls-2
3°C maximum daytime temperature in February in Great Falls3
6°C maximum daytime temperature in March in Great Falls6
13°C maximum daytime temperature in April in Great Falls13
18°C maximum daytime temperature in May in Great Falls18
23°C maximum daytime temperature in June in Great Falls23
28°C maximum daytime temperature in July in Great Falls28
28°C maximum daytime temperature in August in Great Falls28
21°C maximum daytime temperature in September in Great Falls21
15°C maximum daytime temperature in October in Great Falls15
7°C maximum daytime temperature in November in Great Falls7
0°C maximum daytime temperature in December in Great Falls0
Missoula
-1°C maximum daytime temperature in January in Missoula-1
3°C maximum daytime temperature in February in Missoula3
8°C maximum daytime temperature in March in Missoula8
14°C maximum daytime temperature in April in Missoula14
18°C maximum daytime temperature in May in Missoula18
23°C maximum daytime temperature in June in Missoula23
28°C maximum daytime temperature in July in Missoula28
28°C maximum daytime temperature in August in Missoula28
21°C maximum daytime temperature in September in Missoula21
14°C maximum daytime temperature in October in Missoula14
5°C maximum daytime temperature in November in Missoula5
-1°C maximum daytime temperature in December in Missoula-1
West Yellowstone
-6°C maximum daytime temperature in January in West Yellowstone-6
-2°C maximum daytime temperature in February in West Yellowstone-2
1°C maximum daytime temperature in March in West Yellowstone1
7°C maximum daytime temperature in April in West Yellowstone7
13°C maximum daytime temperature in May in West Yellowstone13
19°C maximum daytime temperature in June in West Yellowstone19
24°C maximum daytime temperature in July in West Yellowstone24
23°C maximum daytime temperature in August in West Yellowstone23
18°C maximum daytime temperature in September in West Yellowstone18
11°C maximum daytime temperature in October in West Yellowstone11
1°C maximum daytime temperature in November in West Yellowstone1
-5°C maximum daytime temperature in December in West Yellowstone-5
Whitefish
-2°C maximum daytime temperature in January in Whitefish-2
2°C maximum daytime temperature in February in Whitefish2
6°C maximum daytime temperature in March in Whitefish6
12°C maximum daytime temperature in April in Whitefish12
17°C maximum daytime temperature in May in Whitefish17
22°C maximum daytime temperature in June in Whitefish22
26°C maximum daytime temperature in July in Whitefish26
26°C maximum daytime temperature in August in Whitefish26
20°C maximum daytime temperature in September in Whitefish20
12°C maximum daytime temperature in October in Whitefish12
3°C maximum daytime temperature in November in Whitefish3
-1°C maximum daytime temperature in December in Whitefish-1

All Montana destinations

Montana weather averages by month

Temperature in Montana (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
-1°C maximum daytime temperature in January in Montana (Helena)-1
3°C maximum daytime temperature in February in Montana (Helena)3
6°C maximum daytime temperature in March in Montana (Helena)6
12°C maximum daytime temperature in April in Montana (Helena)12
18°C maximum daytime temperature in May in Montana (Helena)18
23°C maximum daytime temperature in June in Montana (Helena)23
28°C maximum daytime temperature in July in Montana (Helena)28
28°C maximum daytime temperature in August in Montana (Helena)28
20°C maximum daytime temperature in September in Montana (Helena)20
14°C maximum daytime temperature in October in Montana (Helena)14
5°C maximum daytime temperature in November in Montana (Helena)5
0°C maximum daytime temperature in December in Montana (Helena)0
Min temperature (night-time)
-13°C minimum night-time temperature in January in Montana (Helena)-13
-10°C minimum night-time temperature in February in Montana (Helena)-10
-6°C minimum night-time temperature in March in Montana (Helena)-6
-2°C minimum night-time temperature in April in Montana (Helena)-2
3°C minimum night-time temperature in May in Montana (Helena)3
8°C minimum night-time temperature in June in Montana (Helena)8
10°C minimum night-time temperature in July in Montana (Helena)10
9°C minimum night-time temperature in August in Montana (Helena)9
4°C minimum night-time temperature in September in Montana (Helena)4
-1°C minimum night-time temperature in October in Montana (Helena)-1
-7°C minimum night-time temperature in November in Montana (Helena)-7
-12°C minimum night-time temperature in December in Montana (Helena)-12
Heat & Humidity
No heat & humidity in January in Montana (Helena)0
No heat & humidity in February in Montana (Helena)0
No heat & humidity in March in Montana (Helena)0
No heat & humidity in April in Montana (Helena)0
No heat & humidity in May in Montana (Helena)0
No heat & humidity in June in Montana (Helena)0
Low heat & humidity in July in Montana (Helena)L
Low heat & humidity in August in Montana (Helena)L
No heat & humidity in September in Montana (Helena)0
No heat & humidity in October in Montana (Helena)0
No heat & humidity in November in Montana (Helena)0
No heat & humidity in December in Montana (Helena)0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & UV index in Montana

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
9 hours of daylight per day in January in Montana (Helena)9
10 hours of daylight per day in February in Montana (Helena)10
12 hours of daylight per day in March in Montana (Helena)12
14 hours of daylight per day in April in Montana (Helena)14
15 hours of daylight per day in May in Montana (Helena)15
16 hours of daylight per day in June in Montana (Helena)16
15 hours of daylight per day in July in Montana (Helena)15
14 hours of daylight per day in August in Montana (Helena)14
13 hours of daylight per day in September in Montana (Helena)13
11 hours of daylight per day in October in Montana (Helena)11
9 hours of daylight per day in November in Montana (Helena)9
9 hours of daylight per day in December in Montana (Helena)9
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Montana (Helena)1
UV (maximum) index 2 (Low) in February in Montana (Helena)2
UV (maximum) index 3 (Moderate) in March in Montana (Helena)3
UV (maximum) index 5 (Moderate) in April in Montana (Helena)5
UV (maximum) index 7 (High) in May in Montana (Helena)7
UV (maximum) index 8 (Very High) in June in Montana (Helena)8
UV (maximum) index 9 (Very High) in July in Montana (Helena)9
UV (maximum) index 8 (Very High) in August in Montana (Helena)8
UV (maximum) index 5 (Moderate) in September in Montana (Helena)5
UV (maximum) index 3 (Moderate) in October in Montana (Helena)3
UV (maximum) index 1 (Low) in November in Montana (Helena)1
UV (maximum) index 1 (Low) in December in Montana (Helena)1

Rainfall in Montana

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
9 days with some rainfall in January in Montana (Helena)9
7 days with some rainfall in February in Montana (Helena)7
10 days with some rainfall in March in Montana (Helena)10
9 days with some rainfall in April in Montana (Helena)9
11 days with some rainfall in May in Montana (Helena)11
10 days with some rainfall in June in Montana (Helena)10
7 days with some rainfall in July in Montana (Helena)7
8 days with some rainfall in August in Montana (Helena)8
7 days with some rainfall in September in Montana (Helena)7
6 days with some rainfall in October in Montana (Helena)6
8 days with some rainfall in November in Montana (Helena)8
9 days with some rainfall in December in Montana (Helena)9
Average monthly rainfall (mm)
17 mm monthly rainfall in January in Montana (Helena)17
12 mm monthly rainfall in February in Montana (Helena)12
21 mm monthly rainfall in March in Montana (Helena)21
28 mm monthly rainfall in April in Montana (Helena)28
51 mm monthly rainfall in May in Montana (Helena)51
55 mm monthly rainfall in June in Montana (Helena)55
33 mm monthly rainfall in July in Montana (Helena)33
34 mm monthly rainfall in August in Montana (Helena)34
30 mm monthly rainfall in September in Montana (Helena)30
19 mm monthly rainfall in October in Montana (Helena)19
16 mm monthly rainfall in November in Montana (Helena)16
16 mm monthly rainfall in December in Montana (Helena)16

Compare Montana weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Montana, USA (Helena) and the UK (London).

Maximum daytime temperature (°C)

Montana, USA (Helena)
UK (London)
7
3
7
6
10
12
13
18
17
23
20
28
22
28
22
20
19
14
15
5
10
0
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
-1

Metric (°C / mm)  |  Imperial (°F / inches)

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