Helena weather live forecast

Today's maximum temperature in Helena is expected to be 82°F. Select a day from the live weather forecast for Helena, Montana, USA for more weather parameters.

Tuesday
18th Aug
82

61

7

5
Wednesday
19th Aug
86

55

12

7
Thursday
20th Aug
90

55

10

8
Friday
21st Aug
88

61

12

8
Saturday
22nd Aug
84

64

6

7

5-day weather forecast updated at 04:00 on Wednesday 19th August 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 Tuesday 18th August 2026

Expect isolated thunderstorms in Helena, Montana with a maximum temperature of 82°F, low levels of heat & humidity, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 11% chance of some rain and a gentle breeze of 9 mph from the west.

82
°F maximum temperature
61
°F minimum temperature
isolated thunderstorms
7
hours of sunshine
5
UV index (Moderate)
11
% chance of some rain
<2
mm of rainfall expected
L
low heat & humidity
9
mph wind from W

Helena weather for Wednesday 19th August 2026

Expect scattered clouds in Helena, Montana with a maximum temperature of 86°F, low levels of heat & humidity, maximum UV of 7 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the west.

86
°F maximum temperature
55
°F minimum temperature
scattered clouds
12
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
8
mph wind from W

Helena weather for Thursday 20th August 2026

Expect scattered clouds in Helena, Montana with a maximum temperature of 90°F, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the north.

90
°F maximum temperature
55
°F minimum temperature
scattered clouds
10
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
M
moderate heat & humidity
7
mph wind from N

Helena weather for Friday 21st August 2026

Expect scattered clouds in Helena, Montana with a maximum temperature of 88°F, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the north-east.

88
°F maximum temperature
61
°F minimum temperature
scattered clouds
12
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
M
moderate heat & humidity
7
mph wind from NE

Helena weather for Saturday 22nd August 2026

Expect isolated thunderstorms in Helena, Montana with a maximum temperature of 84°F, low levels of heat & humidity, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 31% chance of some rain and a light breeze of 7 mph from the south-west.