Great Falls weather live forecast

Today's maximum temperature in Great Falls is expected to be 25°C. Select a day from the live weather forecast for Great Falls, Montana, USA for more weather parameters.

Sunday
24th May
25

10

14

UV7
Monday
25th May
28

9

12

UV7
Tuesday
26th May
26

14

6

UV6
Wednesday
27th May
18

12

3

UV4
Thursday
28th May
22

11

8

UV6

5-day weather forecast updated at 04:00 on Sunday 24th 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 Sunday 24th May 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 25°C, maximum UV of 7 (High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 30 kph from the south-west.

25
°C maximum temperature
10
°C minimum temperature
scattered clouds
14
hours of sunshine
UV7
UV index (High)
0
mm of rainfall expected
25
°C wind chill
30
kph wind from SW

Great Falls weather for Monday 25th May 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 28°C, 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 19 kph from the south-west.

28
°C maximum temperature
9
°C minimum temperature
scattered clouds
12
hours of sunshine
UV7
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
19
kph wind from SW

Great Falls weather for Tuesday 26th May 2026

Expect isolated thunderstorms in Great Falls, Montana with a maximum temperature of 26°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 72% chance of some rain and a moderate breeze of 20 kph from the north-east.

26
°C maximum temperature
14
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
UV6
UV index (High)
72
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
20
kph wind from NE

Great Falls weather for Wednesday 27th May 2026

Expect isolated thunderstorms in Great Falls, Montana with a maximum temperature of 18°C, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 65% chance of some rain and a gentle breeze of 18 kph from the north-west.

18
°C maximum temperature
12
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
UV4
UV index (Moderate)
65
% chance of some rain
<10
mm of rainfall expected
18
°C wind chill
18
kph wind from NW

Great Falls weather for Thursday 28th May 2026

Expect sunshine and showers in Great Falls, Montana with a maximum temperature of 22°C, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 2-5 mm of rainfall expected with 40% chance of some rain and a gentle breeze of 16 kph from the north-east.