Glacier National Park (MT)
September
Weather in Glacier National Park, Montana for September 2027
Your guide to Glacier National Park weather in September - trends and predictions
In general, the average temperature in Glacier National Park at the beginning of September is 24.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19 °C by the end of September.
Glacier National Park experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 305.1 mm.
Is September a good time to visit Glacier National Park? check out the best time to travel to Glacier National Park page.
✨ Is September a good time to visit Glacier National Park? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
22
Dry days
8
Rainy days
0
Snow days
21°/9°
Temperatures
12 km/h
Avg max wind
58 %
Avg humidity
Glacier National Park Weather September
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Temperatures trend during September in Glacier National Park
See the weather trend as well as the moving average line
September weather in Glacier National Park day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Overcast | 30° /12° | 0 mm | 6 | |
| Sept. 2 |  Light rain | 28° /10° | 4.9 mm | 6 | |
| Sept. 3 | Overcast | 23° /10° | 0.4 mm | 5 | |
| Sept. 4 |  Heavy rain | 21° /10° | 25.3 mm | 5 | |
| Sept. 5 |  Moderate rain | 23° /9° | 17.9 mm | 5 | |
| Sept. 6 | Heavy rain | 24° /9° | 30.4 mm | 5 | |
| Sept. 7 | Heavy rain | 23° /10° | 107.6 mm | 5 | |
| Sept. 8 | Heavy rain | 22° /10° | 46.1 mm | 5 | |
| Sept. 9 |  Sunny | 24° /10° | 0 mm | 5.6 | |
| Sept. 10 |  Patchy rain possible | 24° /10° | 1.5 mm | 5.5 | |
| Sept. 11 | Heavy rain | 19° /10° | 31.2 mm | 4 | |
| Sept. 12 | Light rain | 17° /9° | 5 mm | 3 | |
| Sept. 13 | Patchy rain possible | 18° /6° | 2.1 mm | 4 | |
| Sept. 14 | Patchy rain possible | 16° /7° | 0.9 mm | 3 | |
| Sept. 15 | Light rain | 16° /7° | 5.1 mm | 3 | |
| Sept. 16 | Sunny | 21° /7° | 0 mm | 5 | |
| Sept. 17 | Patchy rain possible | 23° /9° | 0.8 mm | 4.9 | |
| Sept. 18 | Light rain | 22° /10° | 6.9 mm | 4.8 | |
| Sept. 19 | Overcast | 22° /9° | 0 mm | 4 | |
| Sept. 20 | Patchy rain possible | 21° /9° | 0.1 mm | 4.6 | |
| Sept. 21 | Light rain | 18° /7° | 2.7 mm | 4 | |
| Sept. 22 | Overcast | 19° /7° | 0 mm | 4 | |
| Sept. 23 |  Partly cloudy | 21° /8° | 0 mm | 4.4 | |
| Sept. 24 | Sunny | 24° /8° | 0 mm | 4.3 | |
| Sept. 25 | Patchy rain possible | 25° /10° | 0.6 mm | 4.2 | |
| Sept. 26 | Patchy rain possible | 15° /8° | 1.7 mm | 4 | |
| Sept. 27 |  Cloudy | 17° /3° | 0 mm | 4 | |
| Sept. 28 | Partly cloudy | 20° /6° | 0 mm | 3.9 | |
| Sept. 29 | Overcast | 17° /8° | 0.5 mm | 3 | |
| Sept. 30 | Moderate rain | 14° /7° | 13.2 mm | 3 | |
| Next | |||||
Important Notice
Our weather forecast for Glacier National Park in September 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 September - FAQ
What are the expected maximum and minimum temperatures in Glacier National Park during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Glacier National Park during September?
Significant rainfall exceeding 305.1 mm is expected in Glacier National Park during September, occurring over more than 8 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Glacier National Park during September?
The average wind speed in Glacier National Park during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Glacier National Park
Explore the daily rainfall trends and prepare for Glacier National Parks September weather 💧
Typically, Glacier National Park has 8 rainy days in September with a total of 305.1 mm of rainfall.
UV exposure in Glacier National Park during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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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.
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