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 76 掳F on Saturday, while the low is 32 掳F on Monday. There are expected to be 0 sunny days and rain on 2 days this week.

There are currently no weather alerts.

Monday, May 18

- High of 54 掳F, low of 32 掳F (50% humidity)
- Overcast with a 0% chance of rain
- High risk of harm from sun exposure (5 UV index)
- Gentle breeze (9 mph wind)
- Sunrise at 5:44 AM, sunset at 8:58 PM
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Tuesday, May 19

- High of 63 掳F, low of 37 掳F (32% humidity)
- Overcast with a 0% chance of rain
- High risk of harm from sun exposure (6 UV index)
- Fresh breeze (19 mph wind)
- Sunrise at 5:43 AM, sunset at 9:00 PM
2 / 6
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Wednesday, May 20

- High of 56 掳F, low of 42 掳F (69% humidity)
- Overcast with a 100% chance of rain (6 mm of rain)
- Moderate risk of harm from sun exposure (4 UV index)
- Gentle breeze (11 mph wind)
- Sunrise at 5:42 AM, sunset at 9:01 PM
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Thursday, May 21

- High of 61 掳F, low of 44 掳F (45% humidity)
- Overcast with a 100% chance of rain (1 mm of rain)
- High risk of harm from sun exposure (7 UV index)
- Gentle breeze (9 mph wind)
- Sunrise at 5:41 AM, sunset at 9:02 PM
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Friday, May 22

- High of 69 掳F, low of 42 掳F (32% humidity)
- Mostly cloudy with a 0% chance of rain
- High risk of harm from sun exposure (7 UV index)
- Gentle breeze (12 mph wind)
- Sunrise at 5:40 AM, sunset at 9:03 PM
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Saturday, May 23

- High of 76 掳F, low of 49 掳F (30% humidity)
- Mostly cloudy with a 0% chance of rain
- High risk of harm from sun exposure (7 UV index)
- Fresh breeze (24 mph wind)
- Sunrise at 5:39 AM, sunset at 9:04 PM
- First quarter moon
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Sunday, May 24

- High of 75 掳F, low of 55 掳F (25% humidity)
- Overcast with a 0% chance of rain
- High risk of harm from sun exposure (7 UV index)
- Strong breeze (25 mph wind)
- Sunrise at 5:38 AM, sunset at 9:06 PM

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