Grand Teton Forecast Tuesday – Wednesday 7-8 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.

Back to summer

Tuesday: Mostly sunny. Afternoon wind gusts 8-12 mph. Highs in the lower 80’s.

Wednesday: Mostly sunny and unseasonably warm. Afternoon wind gusts 12-16 mph. Highs in the mid 80’s.

Smoke forecast: Smoke, from California, Idaho, Oregon and Montana, will continue over the Park. Expect mostly heavy smoke through Wednesday, perhaps easing a bit on Tuesday afternoon and evening.

Extended Outlook:

Thursday: Mostly sunny and unseasonably warm. Highs in the mid 80’s.

Friday: Increasing cloudiness in the afternoon with a slight chance of a late afternoon shower. Highs in the upper 70’s.

Saturday: Variable cloudiness with showers possible throughout the day. Highs upper 60’s to near 70 deg.

Sunday: Partly to mostly cloudy with afternoon showers probable. Highs around 70 deg.

Monday: Mostly cloudy with showers or periods of rain. Highs in the 60’s.

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