Glacier National Park (MT)
May
Weather in Glacier National Park, Montana for May 2026
Your guide to Glacier National Park weather in May - trends and predictions
An exceptional deviation from the historical average is forecasted for first days of May 2026 in Glacier National Park with the forecasted temperature being 12 °F, much lower than usual.
In general, the average temperature in Glacier National Park at the beginning of May is 17.4 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 23.9 °F by the end of May.
The climate of Glacier National Park in May is notably wet, with an average of 13 rainy days, and a total of 59.4 mm of precipitation.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
18
Dry days
13
Rainy days
0
Snow days
18°/6°
Temperatures
12 km/h
Avg max wind
58 %
Avg humidity
Glacier National Park Weather May
Move between months or click on a day
Temperatures trend during May in Glacier National Park
See the weather trend as well as the moving average line
May weather in Glacier National Park day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Sunny | 16° /-3° | 0 mm | 3 | |
| May 2 |  Patchy rain possible | 17° /-1° | 0.2 mm | 2 | |
| May 3 | Sunny | 24° /6° | 0 mm | 6 | |
| May 4 | Patchy rain possible | 12° /7° | 3.3 mm | 3 | |
| May 5 | Patchy rain possible | 15° /4° | 0.9 mm | 4 | |
| May 6 | Sunny | 17° /0° | 0 mm | 5 | |
| May 7 |  Partly cloudy | 21° /4° | 0 mm | 6 | |
| May 8 | Patchy rain possible | 18° /9° | 1.1 mm | 4 | |
| May 9 |  Cloudy | 23° /5° | 0 mm | 5 | |
| May 10 |  Overcast | 24° /10° | 0 mm | 5 | |
| May 11 | Patchy rain possible | 18° /9° | 6.5 mm | 4 | |
| May 12 |  Moderate or heavy rain shower | 14° /7° | 11.2 mm | 3 | |
| May 13 | Moderate or heavy rain shower | 14° /5° | 2.4 mm | 3 | |
| May 14 | Moderate or heavy rain shower | 13° /5° | 6.8 mm | 3 | |
| May 15 | Moderate rain at times | 12° /7° | 4.2 mm | 3 | |
| May 16 | Moderate rain at times | 14° /4° | 1.7 mm | 3 | |
| May 17 | Cloudy | 16° /5° | 0 mm | 4 | |
| May 18 | Moderate or heavy rain shower | 11° /6° | 5.8 mm | 3 | |
| May 19 | Overcast | 13° /3° | 0.1 mm | 3 | |
| May 20 | Moderate or heavy rain shower | 12° /4° | 1.9 mm | 3 | |
| May 21 | Moderate or heavy rain shower | 12° /4° | 7.1 mm | 3 | |
| May 22 | Overcast | 16° /3° | 0 mm | 4 | |
| May 23 | Patchy rain possible | 16° /7° | 1.5 mm | 4 | |
| May 24 | Sunny | 21° /6° | 0 mm | 6 | |
| May 25 | Sunny | 26° /9° | 0 mm | 7 | |
| May 26 | Sunny | 24° /12° | 0 mm | 6 | |
| May 27 | Partly cloudy | 22° /11° | 0 mm | 6 | |
| May 28 | Sunny | 26° /11° | 0 mm | 7 | |
| May 29 |  Thundery outbreaks possible | 27° /14° | 4.3 mm | 6 | |
| May 30 | Moderate rain at times | 18° /6° | 0.6 mm | 5 | |
| May 31 | Sunny | 24° /5° | 0 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Glacier National Park in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Glacier National Park forecast closer to your planned date for the most up-to-date weather information.
Change Month
Glacier National Park in May - FAQ
What are the expected maximum and minimum temperatures in Glacier National Park during May?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 6°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Glacier National Park during May?
Moderate rainfall is anticipated in Glacier National Park during May, with a total of 59.4 mm spread over approximately 13 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Glacier National Park during May?
The average wind speed in Glacier National Park during May is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Glacier National Park
Explore the daily rainfall trends and prepare for Glacier National Parks May weather 💧
Typically, Glacier National Park has 13 rainy days in May with a total of 59.4 mm of rainfall.
UV exposure in Glacier National Park during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
Quick links
More Glacier National Park weather pages
You are here
Where is Glacier National Park?Get accurate weather forecasts for Glacier National Park, located at latitude 48.683 and longitude -113.8. Stay updated with localized weather information tailored for Glacier National Park.
Related locations
Select a location for accurate weather forecast
More Locations Found a mistake?
We appreciate your attention to details. Tell us here.