Great Falls 7-day weather forecast

Written by:
March 23, 2026
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Great Falls 7-day weather forecast

created the forecast for Great Falls, Montana using data from . This week's high is 87 掳F on Tuesday, while the low is 50 掳F on Monday. There is expected to be 1 sunny day and rain on 5 days this week.

There are currently no weather alerts.

Monday, May 25

- High of 86 掳F, low of 50 掳F (16% humidity)
- Sunny with a 22% chance of rain (0 mm of rain)
- High risk of harm from sun exposure (7 UV index)
- Fresh breeze (20 mph wind)
- Sunrise at 5:37 AM, sunset at 9:07 PM
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Tuesday, May 26

- High of 87 掳F, low of 55 掳F (28% humidity)
- Overcast with a 30% chance of rain (0 mm of rain)
- Very high risk of harm from sun exposure (7 UV index)
- Fresh breeze (21 mph wind)
- Sunrise at 5:36 AM, sunset at 9:08 PM
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Wednesday, May 27

- High of 80 掳F, low of 57 掳F (55% humidity)
- Overcast with a 100% chance of rain (1 mm of rain)
- Very high risk of harm from sun exposure (8 UV index)
- Gentle breeze (10 mph wind)
- Sunrise at 5:35 AM, sunset at 9:09 PM
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Thursday, May 28

- High of 84 掳F, low of 58 掳F (47% humidity)
- Partly sunny with a 100% chance of rain (4 mm of rain)
- Very high risk of harm from sun exposure (8 UV index)
- Gentle breeze (12 mph wind)
- Sunrise at 5:34 AM, sunset at 9:10 PM
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Friday, May 29

- High of 87 掳F, low of 56 掳F (40% humidity)
- Partly cloudy with a 62% chance of rain (1 mm of rain)
- Very high risk of harm from sun exposure (8 UV index)
- Gentle breeze (10 mph wind)
- Sunrise at 5:34 AM, sunset at 9:11 PM
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Saturday, May 30

- High of 79 掳F, low of 58 掳F (29% humidity)
- Mostly cloudy with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Moderate breeze (15 mph wind)
- Sunrise at 5:33 AM, sunset at 9:12 PM
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Sunday, May 31

- High of 79 掳F, low of 54 掳F (35% humidity)
- Overcast with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Moderate breeze (18 mph wind)
- Sunrise at 5:32 AM, sunset at 9:13 PM
- Full moon

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