Updated October 2026
Grand Teton National Park Weather by Month
Grand Teton National Park is warmest in July, when the nearest NOAA climate station averages a high of 77°F and a low of 42°F, and coldest in January, with an average high of 24°F and an average low of 1°F. December is the wettest month, with about 3.1 inches of precipitation. Snowfall is heaviest in December, at about 40 inches.
These figures are NOAA's 1991–2020 climate normals, the 30-year average for each calendar month, from the nearest long-record weather station, 6.4 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Grand Teton National Park can differ from these, particularly with elevation.
Warmest month
Jul
77°F avg high
Coldest month
Jan
1°F avg low
Wettest month
Dec
3.1 in avg
Snowiest month
Dec
39.9 in avg
Longest days
Jun
15.3 h of daylight
Average weather at Grand Teton by month
| Month | Avg high | Avg low | Precipitation | Snowfall | Daylight |
|---|---|---|---|---|---|
| January | 24°F | 1°F | 2.9 in | 39.5 in | 9.1 h |
| February | 30°F | 4°F | 2.3 in | 28.2 in | 10.3 h |
| March | 39°F | 12°F | 2.3 in | 22.0 in | 11.6 h |
| April | 46°F | 21°F | 2.2 in | 11.7 in | 13.2 h |
| May | 56°F | 31°F | 2.4 in | 2.9 in | 14.5 h |
| June | 67°F | 37°F | 1.8 in | 0.3 in | 15.3 h |
| July | 77°F | 42°F | 1.0 in | 0.0 in | 15.0 h |
| August | 76°F | 40°F | 1.3 in | 0.0 in | 13.8 h |
| September | 66°F | 34°F | 1.6 in | 0.4 in | 12.3 h |
| October | 51°F | 25°F | 1.9 in | 6.5 in | 10.8 h |
| November | 35°F | 14°F | 2.6 in | 23.5 in | 9.4 h |
| December | 24°F | 4°F | 3.1 in | 39.9 in | 8.7 h |
| Year total | 25.4 in | 174.9 in |
NOAA 1991–2020 climate normals from station USC00486440, 6.4 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Grand Teton is at that time of year.
Grand Teton weather by season
Winter: December to February
Average highs climb from 24°F in December to 30°F in February, with average lows between 1°F and 4°F. The average high stays at or below freezing in all three months. Together the three months average 8.3 inches of precipitation, about 33% of the yearly total and more than in any other season. Snowfall averages about 108 inches for the season. Daylight is at its shortest, about 8.7 hours in December.
Spring: March to May
Average highs climb from 39°F in March to 56°F in May, with average lows between 12°F and 31°F. The average low is at or below freezing in all three months. Together the three months average 6.9 inches of precipitation, about 27% of the yearly total. Snowfall averages about 37 inches for the season, most of it in March. Daylight lengthens from about 11.6 hours in March to 14.5 in May.
Summer: June to August
Average highs peak at 77°F in July, between 67°F in June and 76°F in August, with average lows between 37°F and 42°F. Together the three months average 4.1 inches of precipitation, about 16% of the yearly total and less than in any other season. Snowfall averages about 0.3 inches for the season. Daylight is at its longest, about 15.3 hours in June.
Fall: September to November
Average highs fall from 66°F in September to 35°F in November, with average lows between 14°F and 34°F. The average low is at or below freezing in October and November. Together the three months average 6.1 inches of precipitation, about 24% of the yearly total. Snowfall averages about 30 inches for the season, most of it in November. Daylight shortens from about 12.3 hours in September to 9.4 in November.
What the National Park Service says about the weather
Grand Teton National Park has long, cold winters—snow and frost are possible any month. April, May, & June - Mild days and cool nights alternate with rain and snow. July & August - Warm days and cool nights prevail, with afternoon thundershowers common. September, October, & November - Sunny days and cold nights alternate with rain and occasional snowstorms. December to April - Between storms the days are sunny and nights are frigid. Snow blankets the mountains and valley.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Grand Teton
Averages describe a typical month, not this week. For current conditions and the seven-day outlook, the National Weather Service issues a forecast for the park's reference point at 43.82°N, 110.71°W. It covers that one spot, so other elevations in the park can differ from it, as they do from the averages above.
National Weather Service forecast for Grand Teton National Park →
Weather and crowds together
July is both the warmest month and the busiest, with about 2.6× the visitors of the park's average month. December is the quietest. To see those crowds set against the weather for all twelve months, read the best time to visit Grand Teton National Park. For hotels, cabins and rentals close to the park, see where to stay near Grand Teton.
Where to stay near Grand Teton
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Frequently Asked Questions
July is the warmest month at Grand Teton National Park, with an average high of 77°F and an average low of 42°F. That is the 1991–2020 average at the nearest long-record NOAA station, 6.4 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
January is the coldest month at Grand Teton National Park, with an average low of 1°F and an average high of 24°F, based on NOAA 1991–2020 climate normals.
December is the wettest month, with about 3.1 inches of precipitation. July is the driest, at about 1 inch. The station records about 25.4 inches of precipitation in an average year.
Yes. The nearest long-record NOAA station, 6.4 miles from the park's reference point, averages about 175 inches of snow a year. December is the snowiest month, at about 40 inches. The station averages at least a tenth of an inch of snow in 10 of the 12 months.
Weather at nearby parks
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Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USC00486440), daylight computed from latitude, weather description from the National Park Service, crowd levels from National Park Service Visitor Use Statistics (1979–2025). Updated 2026-10-11. Lodging results are provided by Stay22; WhenToVisitParks may earn a commission from bookings, at no extra cost to you.