Helena weather live forecast

Today's maximum temperature in Helena is expected to be 66°F. Select a day from the live weather forecast for Helena, Montana, USA for more weather parameters.

Wednesday
16th Sep
66

46

9

5
Thursday
17th Sep
79

46

8

5
Friday
18th Sep
72

55

2

4
Saturday
19th Sep
68

55

4

2
Sunday
20th Sep
75

50

11

5

5-day weather forecast updated at 04:00 on Wednesday 16th September 2026 GMT

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

Helena weather forecast by day

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

Helena weather for Wednesday 16th September 2026

Expect scattered clouds in Helena, Montana with a maximum temperature of 66°F, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the west.

66
°F maximum temperature
46
°F minimum temperature
scattered clouds
9
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
66
°F wind chill
8
mph wind from W

Helena weather for Thursday 17th September 2026

Expect sunshine and showers in Helena, Montana with a maximum temperature of 79°F, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 52% chance of some rain and a light breeze of 6 mph from the west.

79
°F maximum temperature
46
°F minimum temperature
sunshine and showers
8
hours of sunshine
5
UV index (Moderate)
52
% chance of some rain
<2
mm of rainfall expected
79
°F wind chill
6
mph wind from W

Helena weather for Friday 18th September 2026

Expect isolated thunderstorms in Helena, Montana with a maximum temperature of 72°F, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 5-10 mm of rainfall expected with 77% chance of some rain and a light breeze of 6 mph from the north.

72
°F maximum temperature
55
°F minimum temperature
isolated thunderstorms
2
hours of sunshine
4
UV index (Moderate)
77
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
6
mph wind from N

Helena weather for Saturday 19th September 2026

Expect isolated thunderstorms in Helena, Montana with a maximum temperature of 68°F, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 5-10 mm of rainfall expected with 40% chance of some rain and a light breeze of 5 mph from the west.

68
°F maximum temperature
55
°F minimum temperature
isolated thunderstorms
4
hours of sunshine
2
UV index (Low)
40
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
5
mph wind from W

Helena weather for Sunday 20th September 2026

Expect scattered clouds in Helena, Montana with a maximum temperature of 75°F, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the south-west.