Weather
Glacier National Park Weather
Regardless of the season, the weather is always perfect in St, Mary, Montana for a variety of activities. Though winds tend to predominate on the east side of the park, sunny days are quite common. The Glacier's western valleys generally receive the most rainfall.
Glacier National Park weather during the summer months, average daytime temperatures exceed 70 degrees Fahrenheit. It is frequently 10 to 15 degrees cooler at higher elevations. Overnight lows throughout the park can drop to near 20 degrees Fahrenheit. And snow can fall literally anytime of the year. In fact, in August of 1992, a foot of snow fell on the northeastern corner of Glacier.
It's always recommended that you dress in layers. In the summer, start the day in a T-shirt, a parka and shorts. Midday remove the parka, by evening don the parka again.
Be prepared for a variety of conditions and remember to pack raingear.
| Month |
Avg Low Temp |
Avg High Temp |
Avg Precipitation |
Avg Snowfall |
| May |
|
|
|
|
|
37 F |
64.1 F |
2.6 in |
.5 |
| June |
|
|
|
|
|
43.7 F |
71.3 F |
3.26 in |
0.2 in |
| July |
|
|
|
|
|
47.3 F |
79.2 F |
1.74 in |
0.0 in |
| August |
|
|
|
|
|
46.1 F |
77.8 F |
1.67 in |
0.0 in |
| September |
|
|
|
|
|
38.8 F |
66.6 F |
2.06 in |
0.0 in |
| October |
|
|
|
|
|
31.8 F |
52.5 F |
2.34 in |
2.1 in |
| Novemeber |
|
|
|
|
|
24.7 F |
37.1 F |
3.12 in |
18.0 in |
| December |
|
|
|
|
|
18.3 F |
30.0 F |
3.28 in |
38.0 in |
| January |
|
|
|
|
|
14.6 F |
3.37 F |
39.6 in |
18.0 in |
| February |
|
|
|
|
|
18.5 F |
34.7 F |
2.34 in |
21.0 in |
| March |
|
|
|
|
|
22.6 F |
41.8 F |
1.84 in |
14.7 in |
| April |
|
|
|
|
|
29.8 F |
52.8 F |
1.81 in |
3.4 in |
National Park Service WeatherCam
Click Here to view the National Park Service weathercam in St. Mary, Montana.
