Great Falls weather live forecast

Today's maximum temperature in Great Falls is expected to be 26°C. Select a day from the live weather forecast for Great Falls, Montana, USA for more weather parameters.

Wednesday
27th May
26

16

8

6
Thursday
28th May
30

14

13

7
Friday
29th May
29

14

10

7
Saturday
30th May
21

11

4

6
Sunday
31st May
18

10

10

7

5-day weather forecast updated at 04:00 on Wednesday 27th May 2026 GMT

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

Great Falls weather forecast by day

Below are the detailed weather forecasts for Great Falls for the next 5 days.

Great Falls weather for Wednesday 27th May 2026

Expect broken clouds in Great Falls, Montana with a maximum temperature of 26°C, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the west.

26
°C maximum temperature
16
°C minimum temperature
broken clouds
8
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
15
kph wind from W

Great Falls weather for Thursday 28th May 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the east.

30
°C maximum temperature
14
°C minimum temperature
scattered clouds
13
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
19
kph wind from E

Great Falls weather for Friday 29th May 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 29°C, low levels of heat & humidity, maximum UV of 7 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the south-east.

29
°C maximum temperature
14
°C minimum temperature
scattered clouds
10
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
19
kph wind from SE

Great Falls weather for Saturday 30th May 2026

Expect isolated thunderstorms in Great Falls, Montana with a maximum temperature of 21°C, maximum UV of 6 (High) and 4 hours of bright sunshine. There are 10-20 mm of rainfall expected with 89% chance of some rain and a moderate breeze of 23 kph from the west.

21
°C maximum temperature
11
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
6
UV index (High)
89
% chance of some rain
<20
mm of rainfall expected
21
°C wind chill
23
kph wind from W

Great Falls weather for Sunday 31st May 2026

Expect isolated thunderstorms in Great Falls, Montana with a maximum temperature of 18°C, maximum UV of 7 (High) and 10 hours of bright sunshine. There are 10-20 mm of rainfall expected with 57% chance of some rain and a moderate breeze of 28 kph from the south-west.