Great Falls Weather in May
May in Great Falls brings moderate temperatures, with daytime highs of 18°C (64°F) and nights around 4°C (39°F). It's also the wettest month of the year, so an umbrella is a must.
Rainfall in Great Falls in May
This month is known for heavy rainfall, so don't forget your umbrella to stay dry. Analyzing past climate data, one can expect approximately 12 days of rain, averaging 67 mm (2.6 in). Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in Great Falls in May
May in Great Falls sees highs of 18°C (64°F) and lows of 4°C (39°F) overnight. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights drop to 4°C (39°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Great Falls in May
The days are predominantly sunny, with an estimated total of around 289 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.
Wind Speed in Great Falls in May
In May, average wind speeds reach 4 m/s (8 knots), leading to light to moderate breezes. Conditions vary from day to day, with both calm and windier periods.If your ideal day consists of dry skies and pleasant temperatures, June, August and September typically offer the best circumstances for Great Falls.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Great Falls's climate page.
Great Falls Temperature in May
Min Temperature
4°C (39°F)
Max Temperature
18°C (64°F)
Chance of Rain
41%
Precipitation
67 mm (2.6 in)
Rainy days
12 days
Humidity
45%
Windspeed
4 m/s (8 knots)
Sunshine
289 hours
Percentage Sunshine
Best Places in the United States of America in May
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →
perfect weather
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What to Wear in Great Falls in May
Comfortable temperatures call for an easy wardrobe in May. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Great Falls in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Great Falls's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Great Falls climate overview or explore weather in the United States of America.
