| |
Average
Maximum Temp |
Average
Minimum Temp |
Average
Precipitation |
Average
Snowfall (inches) |
Average
Snow Depth (inches) |
|
Jan
|
25.7
|
1.2
|
2.61
|
44.4
|
28
|
|
Feb
|
31.1
|
3.6
|
2.00
|
30.0
|
34
|
|
Mar
|
39.0
|
11.9
|
1.6
|
20.6
|
32
|
|
Apr
|
49.0
|
22.1
|
1.45
|
9.3
|
13
|
|
May
|
60.9
|
30.9
|
1.96
|
2.8
|
0
|
|
Jun
|
70.6
|
37.2
|
1.8
|
0.1
|
0
|
|
Jul
|
79.8
|
41.2
|
1.22
|
0
|
0
|
|
Aug
|
78.8
|
39.6
|
1.37
|
0
|
0
|
|
Sep
|
68.9
|
32.2
|
1.44
|
0.5
|
0
|
|
Oct
|
55.9
|
23.2
|
1.24
|
4.4
|
0
|
|
Nov
|
38.0
|
13.7
|
2.14
|
25.2
|
4
|
|
Dec
|
26.0
|
1.5
|
2.47
|
39.2
|
16
|
|
Annual
|
52.0
|
21.5
|
21.3
|
176.5
|
11
|
Grand Teton National Park has long, cold winters.
The first heavy snows fall by November 1 and continue through March;
snow and frost are possible during any month.
Summer days are normally mild with temperatures in the 70s and 80s with
cool nights in the 40s. Summer thunderstorms are common. Mild to cool
temperatures occur through September and October. Raingear is
recommended during spring, summer, and fall. Sub-zero temperatures are
common throughout winter and demand multi-layered clothing, hats,
mittens and cold weather boots.
Mid-April, May, June
Mild days and cool nights alternate with rain and occasional snow.
Valley trails are snow covered until late May.
July and August
Warm days and cool nights prevail, with afternoon thundershowers common.
September, October, November
Sunny days and cold nights alternate with rain and occasional snow
storms.
December through mid-April
Between storms the days are sunny and nights are frigid. Snow blankets
mountains and valley. Travel is not advised and roads may be closed
during blizzards.
Recommended Clothing
Raingear is recommended during spring, summer, and fall. Sub-zero
temperatures are common throughout winter and demand multi-layered
clothing, hats, mittens and cold weather boots. |
