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 °F
30°F maximum daytime temperature in January in Helena30
37°F maximum daytime temperature in February in Helena37
43°F maximum daytime temperature in March in Helena43
54°F maximum daytime temperature in April in Helena54
64°F maximum daytime temperature in May in Helena64
73°F maximum daytime temperature in June in Helena73
82°F maximum daytime temperature in July in Helena82
82°F maximum daytime temperature in August in Helena82
68°F maximum daytime temperature in September in Helena68
57°F maximum daytime temperature in October in Helena57
41°F maximum daytime temperature in November in Helena41
32°F maximum daytime temperature in December in Helena32
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.

Top Montana destinations

Below are average maximum temperatures at popular countries, regions and places in Montana for next month - March. Select a destination to see the climate guide for all months of the year.

All Montana destinations

Metric (°C)  |  Imperial (°F)

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Montana weather averages

Temperature in Montana (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
30°F maximum daytime temperature in January in Montana (Helena)30
37°F maximum daytime temperature in February in Montana (Helena)37
43°F maximum daytime temperature in March in Montana (Helena)43
54°F maximum daytime temperature in April in Montana (Helena)54
64°F maximum daytime temperature in May in Montana (Helena)64
73°F maximum daytime temperature in June in Montana (Helena)73
82°F maximum daytime temperature in July in Montana (Helena)82
82°F maximum daytime temperature in August in Montana (Helena)82
68°F maximum daytime temperature in September in Montana (Helena)68
57°F maximum daytime temperature in October in Montana (Helena)57
41°F maximum daytime temperature in November in Montana (Helena)41
32°F maximum daytime temperature in December in Montana (Helena)32
Min temperature (night-time)
9°F minimum night-time temperature in January in Montana (Helena)9
14°F minimum night-time temperature in February in Montana (Helena)14
21°F minimum night-time temperature in March in Montana (Helena)21
28°F minimum night-time temperature in April in Montana (Helena)28
37°F minimum night-time temperature in May in Montana (Helena)37
46°F minimum night-time temperature in June in Montana (Helena)46
50°F minimum night-time temperature in July in Montana (Helena)50
48°F minimum night-time temperature in August in Montana (Helena)48
39°F minimum night-time temperature in September in Montana (Helena)39
30°F minimum night-time temperature in October in Montana (Helena)30
19°F minimum night-time temperature in November in Montana (Helena)19
10°F minimum night-time temperature in December in Montana (Helena)10
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 (inches)
0.7 inches monthly rainfall in January in Montana (Helena)0.7
0.5 inches monthly rainfall in February in Montana (Helena)0.5
0.8 inches monthly rainfall in March in Montana (Helena)0.8
1.1 inches monthly rainfall in April in Montana (Helena)1.1
2.0 inches monthly rainfall in May in Montana (Helena)2.0
2.2 inches monthly rainfall in June in Montana (Helena)2.2
1.3 inches monthly rainfall in July in Montana (Helena)1.3
1.3 inches monthly rainfall in August in Montana (Helena)1.3
1.2 inches monthly rainfall in September in Montana (Helena)1.2
0.7 inches monthly rainfall in October in Montana (Helena)0.7
0.6 inches monthly rainfall in November in Montana (Helena)0.6
0.6 inches monthly rainfall in December in Montana (Helena)0.6

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 (°F)

Montana, USA (Helena)
UK (London)
45
37
45
43
50
54
55
64
63
73
68
82
72
82
72
68
66
57
59
41
50
32
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
30

Metric (°C)  |  Imperial (°F)

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