Hamilton weather live forecast

Today's maximum temperature in Hamilton is expected to be 19°C. Select a day from the live weather forecast for Hamilton, Montana, USA for more weather parameters.

Saturday
19th Sep
19

9

2

3
Sunday
20th Sep
22

7

11

5
Monday
21st Sep
24

8

12

5
Tuesday
22nd Sep
24

9

7

4
Wednesday
23rd Sep
24

10

9

4

5-day weather forecast updated at 04:03 on Sunday 20th September 2026 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 Saturday 19th September 2026

Expect mostly cloudy with rain in Hamilton, Montana with a maximum temperature of 19°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 5-10 mm of rainfall expected with 91% chance of some rain and a light breeze of 8 kph from the south.

19
°C maximum temperature
9
°C minimum temperature
mostly cloudy with rain
2
hours of sunshine
3
UV index (Moderate)
91
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
8
kph wind from S

Hamilton weather for Sunday 20th September 2026

Expect clear skies in Hamilton, Montana with a maximum temperature of 22°C, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the south.

22
°C maximum temperature
7
°C minimum temperature
clear skies
11
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
22
°C wind chill
6
kph wind from S

Hamilton weather for Monday 21st September 2026

Expect clear skies in Hamilton, Montana with a maximum temperature of 24°C, maximum UV of 5 (Moderate) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the south.

24
°C maximum temperature
8
°C minimum temperature
clear skies
12
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
24
°C wind chill
6
kph wind from S

Hamilton weather for Tuesday 22nd September 2026

Expect scattered clouds in Hamilton, Montana with a maximum temperature of 24°C, maximum UV of 4 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 5 kph from the south.

24
°C maximum temperature
9
°C minimum temperature
scattered clouds
7
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
5
kph wind from S

Hamilton weather for Wednesday 23rd September 2026

Expect scattered clouds in Hamilton, Montana with a maximum temperature of 24°C, maximum UV of 4 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south.