Lewistown weather by month

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

Temperature
Rainfall
Sunshine & daylight
UV levels & humidity

Temperature in Lewistown (°F)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	30	36	41	54	63	72	81	81	68	59	43	32
Min temperature (night-time)	9	14	19	28	37	45	50	50	41	32	19	10
Heat & Humidity	0	0	0	0	0	0	L	L	0	0	0	0

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

Sunshine & Daylight in Lewistown

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daily hours of sunshine	4	6	8	9	10	11	12	11	9	7	4	4
Daily hours of daylight	9	10	12	14	15	16	15	14	13	11	9	9
UV Index (Maximum)	1	2	3	5	7	8	8	7	5	3	1	1

Rainfall in Lewistown

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	8	7	8	9	11	10	7	7	7	5	6	7
Average monthly rainfall (inches)	0.8	0.6	0.9	1.2	3.2	3.1	1.7	1.8	1.5	1.0	0.7	0.7

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Lewistown by month

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

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The climate guide for Montana (Lewistown) 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.

What's the climate like in Lewistown?

Lewistown has a cold climate with warm summers and some rainfall in all months.

Lewistown weather in January

Expect daytime maximum temperatures of 30°F in Lewistown, Montana in January based on long-term weather averages. There are 4 hours of sunshine per day on average, which might fall as snow.

30
30°F max day temperature
4
4 hours of sunshine per day
8
8 days with some rainfall
9
9°F min night temperature
9
9 hours of daylight per day
0
No heat & humidity
0.8
0.8 inches of monthly rainfall
1
1 (Low) UV index

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Lewistown weather in February

Expect daytime maximum temperatures of 36°F in Lewistown, Montana in February based on long-term weather averages. There are 6 hours of sunshine per day on average, which might fall as snow.

36
36°F max day temperature
6
6 hours of sunshine per day
7
7 days with some rainfall
14
14°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
0.6
0.6 inches of monthly rainfall
2
2 (Low) UV index

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Lewistown weather in March

Expect daytime maximum temperatures of 41°F in Lewistown, Montana in March based on long-term weather averages. There are 8 hours of sunshine per day on average, which might fall as snow.

41
41°F max day temperature
8
8 hours of sunshine per day
8
8 days with some rainfall
19
19°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
0.9
0.9 inches of monthly rainfall
3
3 (Moderate) UV index

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Lewistown weather in April

Expect daytime maximum temperatures of 54°F in Lewistown, Montana in April based on long-term weather averages. There are 9 hours of sunshine per day on average.

54
54°F max day temperature
9
9 hours of sunshine per day
9
9 days with some rainfall
28
28°F min night temperature
14
14 hours of daylight per day
0
No heat & humidity
1.2
1.2 inches of monthly rainfall
5
5 (Moderate) UV index

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Lewistown weather in May

Expect daytime maximum temperatures of 63°F in Lewistown, Montana in May based on long-term weather averages. There are 10 hours of sunshine per day on average with 11 days with some rainfall and typically 3.2 inches of rainfall in the month.

63
63°F max day temperature
10
10 hours of sunshine per day
11
11 days with some rainfall
37
37°F min night temperature
15
15 hours of daylight per day
0
No heat & humidity
3.2
3.2 inches of monthly rainfall
7
7 (High) UV index

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Lewistown weather in June

Expect daytime maximum temperatures of 72°F in Lewistown, Montana in June based on long-term weather averages. There are 11 hours of sunshine per day on average with 10 days with some rainfall and typically 3.1 inches of rainfall in the month.

72
72°F max day temperature
11
11 hours of sunshine per day
10
10 days with some rainfall
45
45°F min night temperature
16
16 hours of daylight per day
0
No heat & humidity
3.1
3.1 inches of monthly rainfall
8
8 (Very High) UV index

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Lewistown weather in July

Expect daytime maximum temperatures of 81°F in Lewistown, Montana in July based on long-term weather averages. There are 12 hours of sunshine per day on average with typically 1.7 inches of rainfall in the month.

81
81°F max day temperature
12
12 hours of sunshine per day
7
7 days with some rainfall
50
50°F min night temperature
15
15 hours of daylight per day
L
Low heat & humidity
1.7
1.7 inches of monthly rainfall
8
8 (Very High) UV index

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Lewistown weather in August

Expect daytime maximum temperatures of 81°F in Lewistown, Montana in August based on long-term weather averages. There are 11 hours of sunshine per day on average with typically 1.8 inches of rainfall in the month.

81
81°F max day temperature
11
11 hours of sunshine per day
7
7 days with some rainfall
50
50°F min night temperature
14
14 hours of daylight per day
L
Low heat & humidity
1.8
1.8 inches of monthly rainfall
7
7 (High) UV index

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Lewistown weather in September

Expect daytime maximum temperatures of 68°F in Lewistown, Montana in September based on long-term weather averages. There are 9 hours of sunshine per day on average.

68
68°F max day temperature
9
9 hours of sunshine per day
7
7 days with some rainfall
41
41°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
1.5
1.5 inches of monthly rainfall
5
5 (Moderate) UV index

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Lewistown weather in October

Expect daytime maximum temperatures of 59°F in Lewistown, Montana in October based on long-term weather averages. There are 7 hours of sunshine per day on average.

59
59°F max day temperature
7
7 hours of sunshine per day
5
5 days with some rainfall
32
32°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
1.0
1.0 inches of monthly rainfall
3
3 (Moderate) UV index

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Lewistown weather in November

Expect daytime maximum temperatures of 43°F in Lewistown, Montana in November based on long-term weather averages. There are 4 hours of sunshine per day on average, which might fall as snow.

43
43°F max day temperature
4
4 hours of sunshine per day
6
6 days with some rainfall
19
19°F min night temperature
9
9 hours of daylight per day
0
No heat & humidity
0.7
0.7 inches of monthly rainfall
1
1 (Low) UV index

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Lewistown weather in December

Expect daytime maximum temperatures of 32°F in Lewistown, Montana in December based on long-term weather averages. There are 4 hours of sunshine per day on average, which might fall as snow.

32
32°F max day temperature
4
4 hours of sunshine per day
7
7 days with some rainfall
10
10°F min night temperature
9
9 hours of daylight per day
0
No heat & humidity
0.7
0.7 inches of monthly rainfall
1
1 (Low) UV index

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