Great Falls 7-day weather forecast

Written by:
March 23, 2026
ESOlex // Shutterstock

Great Falls 7-day weather forecast

Stacker created the forecast for Great Falls, Montana using data from OpenWeather. This week's high is 72 °F on Friday, while the low is 21 °F on Monday. There are expected to be 3 sunny days and rain on 3 days this week.

There are currently no weather alerts.

Monday, April 27

- High of 50 °F, low of 21 °F (41% humidity)
- Fair with a 0% chance of rain
- High risk of harm from sun exposure (6 UV index)
- Gentle breeze (12 mph wind)
- Sunrise at 6:14 AM, sunset at 8:30 PM
1 / 6
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Tuesday, April 28

- High of 58 °F, low of 33 °F (34% humidity)
- Partly cloudy with a 32% chance of rain (0 mm of rain)
- High risk of harm from sun exposure (6 UV index)
- Gentle breeze (10 mph wind)
- Sunrise at 6:13 AM, sunset at 8:32 PM
2 / 6
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Wednesday, April 29

- High of 60 °F, low of 39 °F (38% humidity)
- Partly cloudy with a 0% chance of rain
- High risk of harm from sun exposure (5 UV index)
- Gentle breeze (10 mph wind)
- Sunrise at 6:11 AM, sunset at 8:33 PM
3 / 6
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Thursday, April 30

- High of 65 °F, low of 40 °F (33% humidity)
- Sunny with a 0% chance of rain
- High risk of harm from sun exposure (6 UV index)
- Gentle breeze (10 mph wind)
- Sunrise at 6:09 AM, sunset at 8:34 PM
4 / 6
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Friday, May 1

- High of 72 °F, low of 45 °F (24% humidity)
- Mostly sunny with a 0% chance of rain
- High risk of harm from sun exposure (6 UV index)
- Moderate breeze (14 mph wind)
- Sunrise at 6:08 AM, sunset at 8:36 PM
- Full moon
5 / 6
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Saturday, May 2

- High of 58 °F, low of 49 °F (68% humidity)
- Overcast with a 100% chance of rain (2 mm of rain)
- High risk of harm from sun exposure (6 UV index)
- Moderate breeze (13 mph wind)
- Sunrise at 6:06 AM, sunset at 8:37 PM
6 / 6
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Sunday, May 3

- High of 46 °F, low of 37 °F (97% humidity)
- Overcast with a 100% chance of rain (15 mm of rain)
- High risk of harm from sun exposure (6 UV index)
- Moderate breeze (14 mph wind)
- Sunrise at 6:04 AM, sunset at 8:39 PM

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