Hamilton weather live forecast

Today's maximum temperature in Hamilton is expected to be 79°F. Select a day from the live weather forecast for Hamilton, Montana, USA for more weather parameters.

Wednesday
17th Sep
79

45

12

6
Thursday
18th Sep
77

54

12

6
Friday
19th Sep
79

52

5

5
Saturday
20th Sep
81

50

9

6
Sunday
21st Sep
70

48

6

6

5-day weather forecast updated at 04:04 on Thursday 18th September 2025 GMT

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The 5-day weather forecast for Montana (Hamilton) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Hamilton weather forecast by day

Below are the detailed weather forecasts for Hamilton for the next 5 days.

Hamilton weather for Wednesday 17th September 2025

Expect clear skies in Hamilton, Montana with a maximum temperature of 79°F, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 4 mph from the south.

79
°F maximum temperature
45
°F minimum temperature
clear skies
12
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
79
°F wind chill
4
mph wind from S

Hamilton weather for Thursday 18th September 2025

Expect clear skies in Hamilton, Montana with a maximum temperature of 77°F, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the south.

77
°F maximum temperature
54
°F minimum temperature
clear skies
12
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
6
mph wind from S

Hamilton weather for Friday 19th September 2025

Expect scattered clouds in Hamilton, Montana with a maximum temperature of 79°F, maximum UV of 5 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the south.

79
°F maximum temperature
52
°F minimum temperature
scattered clouds
5
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
79
°F wind chill
6
mph wind from S

Hamilton weather for Saturday 20th September 2025

Expect scattered clouds in Hamilton, Montana with a maximum temperature of 81°F, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the west.

81
°F maximum temperature
50
°F minimum temperature
scattered clouds
9
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
81
°F wind chill
9
mph wind from W

Hamilton weather for Sunday 21st September 2025

Expect scattered clouds in Hamilton, Montana with a maximum temperature of 70°F, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the west.

70
°F maximum temperature
48
°F minimum temperature
scattered clouds
6
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
11
mph wind from W

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Montana - quick facts
Flight time^✝	13 hours
Time difference	UK -7 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes
Why visit?	Nature
Tourist info	Montana Office of Tourism