The Teton Range rewards visitors on both of its sides and in both peak seasons. Summer (June through September) is prime across the range — hiking, climbing, and Snake River floats on the Wyoming/Jackson Hole side, and quieter trails, fly-fishing and cycling on the Idaho/Teton Valley side around Driggs and Victor. Winter (roughly late November through early April) brings deep, dry powder: Jackson Hole Mountain Resort and Snow King on the east, and Grand Targhee plus the famed Teton Pass backcountry on the west. Spring and fall are quieter and cheaper shoulder seasons — the elk rut and fall color arrive in late September, and mud season in April and May can limit high-country access. Note that Teton Pass, the mountain road linking the two sides, can close in winter storms, so check conditions before crossing.
| Month | High (°F) | Low (°F) | Notes |
|---|---|---|---|
| Jan | 26 | 2 | Deep winter; peak powder at Jackson Hole and Grand Targhee. The Idaho side (Driggs) runs a touch colder. |
| Feb | 30 | 5 | Reliable snowpack range-wide; cold, bluebird ski days. |
| Mar | 39 | 13 | Sunnier spring skiing; snow lingers high on both slopes. |
| Apr | 49 | 22 | Mud/shoulder season; resorts wind down and trails stay snowbound. |
| May | 61 | 29 | Valleys green up; ElkFest in Jackson and rivers begin to run high. |
| Jun | 70 | 36 | Wildflowers, wildlife and the first floats; snow still caps the passes. |
| Jul | 80 | 40 | Warm, dry peak summer; hiking, climbing and the Teton Valley Balloon Rally. |
| Aug | 79 | 39 | Great hiking and rafting; afternoon thunderstorms build over the peaks. |
| Sep | 69 | 31 | Crisp days, fall color and the elk rut; a favorite month range-wide. |
| Oct | 55 | 23 | Quiet shoulder season; first snows dust the summits. |
| Nov | 38 | 14 | Winter returns; resorts open late in the month. |
| Dec | 27 | 4 | Cold and snowy; holiday ski season in full swing on both sides. |