Best Time to Visit Grand Teton National Park
USA
☀️
June to September
Best Months
🌧️
December
Avoid
👥
Jun–Sep
Peak Season
🧭
Camping, hiking and RV road trips
Ideal For
Grand Teton National Park climate month by month
Jan
18°
2.4"
Feb
18°
2.5"
Mar
24°
2.1"
Apr
30°
2.4"
May
40°
2.2"
Jun
53°
1.5"
Jul
64°
0.7"
Aug
60°
2.5"
Sep
53°
1.7"
Oct
39°
2.7"
Nov
26°
2.9"
Dec
20°
3.7"
Top number = average temperature (°F), bar = average monthly rainfall (inches). Toggle units above.
🌍 When to go to Grand Teton National Park
Based on recent climate averages (2021–2023, Open-Meteo), Grand Teton National Park is warmest in July (around 18°C / 64°F) and coldest in February (around -8°C / 18°F). Rain is heaviest in December (about 94 mm) and lightest in July (about 17 mm). For comfortable camping and RV travel, aim for June to September.
Data source & date
- Climate values: Open-Meteo (ERA5 reanalysis archive), 2021–2023 daily averages — open-meteo.com ↗
- Retrieved and frozen: 2026-07-20 (values are static, not live-fetched)
- Monthly means are long-run averages, not a forecast — actual weather varies year to year. Season labels are derived from these values; travel advice is editorial.
Cold-weather camping & RV kit for Grand Teton National Park
Nights here drop near or below freezing even inside the recommended season — usually because of altitude, not latitude. The gear that matters is what keeps heat in overnight and water lines flowing.
- View ↗0°F sleeping bagA 30°F bag is the single most common mistake at altitude. Rated to 0°F leaves headroom.
- View ↗Insulated pad, R-value 6.5Most heat is lost downward. R-value above 5 is the line between a cold night and a warm one.
- View ↗Portable propane heater9,000 BTU with oxygen depletion sensor — the standard for tents and small RV interiors.
- View ↗Reflective window insulationRV windows are the biggest heat leak. A roll cut to size costs less than one cold night.
- View ↗Heated drinking-water hoseBelow freezing an ordinary hose splits. This one is thermostat-controlled and drinking-water safe.
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