Weather in Great Falls in May
Great Falls, United States averages a high of 17.8°C (64°F) and low of 5.7°C (42.3°F) in May, with 10 rain days and 11.7 hours of daily sunshine. Travel score: 73.8/100 (Good). The best time to visit Great Falls is August.
High
18°C64°F
Low
6°C42°F
🌧️
10
rain days
☀️
11.7
hrs/day sunshine
💧
55%
humidity
74— Good
May in Great Falls is mild and occasionally wet — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in Great Falls?
How much does it rain in Great Falls in May?
Great Falls receives an average of 61.9mm of rainfall across 10 rainy days in May. The annual total is 396.9mm.
What should I pack for Great Falls in May?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 18°C
Traveling to United States in May?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31