Great Falls weather live forecast

Today's maximum temperature in Great Falls is expected to be 14°C. Select a day from the live weather forecast for Great Falls, Montana, USA for more weather parameters.

Tuesday
20th Oct
14

5

8

3
Wednesday
21st Oct
20

5

10

3
Thursday
22nd Oct
21

8

9

3
Friday
23rd Oct
12

4

0

0
Saturday
24th Oct
9

2

6

2

5-day weather forecast updated at 04:00 on Tuesday 20th October 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 Tuesday 20th October 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 14°C, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the west.

14
°C maximum temperature
5
°C minimum temperature
scattered clouds
8
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
14
°C wind chill
12
kph wind from W

Great Falls weather for Wednesday 21st October 2026

Expect clear skies in Great Falls, Montana with a maximum temperature of 20°C, maximum UV of 3 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south.

20
°C maximum temperature
5
°C minimum temperature
clear skies
10
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
20
°C wind chill
15
kph wind from S

Great Falls weather for Thursday 22nd October 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 21°C, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south-west.

21
°C maximum temperature
8
°C minimum temperature
scattered clouds
9
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
15
kph wind from SW

Great Falls weather for Friday 23rd October 2026

Expect mostly cloudy with rain in Great Falls, Montana with a maximum temperature of 12°C and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 84% chance of some rain and a fresh breeze of 32 kph from the north-west.

12
°C maximum temperature
4
°C minimum temperature
mostly cloudy with rain
0
hours of sunshine
0
UV index (None)
84
% chance of some rain
<20
mm of rainfall expected
12
°C wind chill
32
kph wind from NW

Great Falls weather for Saturday 24th October 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 9°C, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the south-west.