Grand Teton Forecast Saturday – Sunday 4-5 September

  • Short-term forecast, emphasizing weather parameters most important to visitors in the Jenny Lake / String Lake / Leigh Lake region
  • Animations of expected weather radar updated daily.
    • Other weather parameters (snow, wind, etc.) added when they may be significant.
    • For orientation, animation maps show Wyoming and a small portion of the surrounding states.
  • Temperature graphic is for the Airport. Subtract a couple of degrees for String Lake and 3-5 degrees if a visitor asks about Colter Bay.
  • The wind gusts forecasts are usually (in the summer) a reasonable forecast for average sustained wind speeds at 9,000 – 11,000 feet for backcountry hikers.
  • For those with access to Grand Teton Park Radios: Channel 16 is NOAA Weather Radio
  • Click here for access to the NOAA smoke-forecasting site.
  • Click here for an animation of smoke concentration over the northwest U.S. for the next two days.

Warm, smoky and dry weather ahead

Saturday: Mostly sunny after a frosty start. Afternoon wind gusts 12-16 mph. Highs in the low 70’s.

Sunday: Mostly sunny. Afternoon wind gusts 10-15 mph. High in the mid to upper 70’s.

Smoke forecast: The smoke, mostly from California, will continue over the Park. The smoke will wax and wane. Smoke becomes light by Satuday afternoon, but heavy smoke returns by Sunday afternoon.

Extended Outlook:

Monday – Thursday: Mostly sunny. Highs around 80 deg, except highs in the low to mid 80’s on Wednesday.

Friday: Variable cloudiness with a chance of showers. Highs in the lower 70’s.

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