Grand Lake
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Grand Lake Weather in September

September in Grand Lake brings pleasant temperatures, with daytime highs of 19°C (66°F) and nights around 2°C (36°F). Expect around 54 mm (2.1 in) of rainfall during the month.

Rainfall in Grand Lake in September

Historically, the month has about 11 days of rain, averaging 54 mm (2.1 in) in total. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Grand Lake in September

September in Grand Lake brings typical temperatures with highs around 19°C (66°F) and lows of 2°C (36°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. At 2°C (36°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

If your ideal day consists of dry skies and pleasant temperatures, June, July and August typically offer the best circumstances for Grand Lake.

Grand Lake Temperature in September

Min Temperature
2°C (36°F)
Max Temperature
19°C (66°F)
Chance of Rain
37%
Precipitation
54 mm (2.1 in)
Rainy days
11 days

Grand Lake Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Grand Lake - and find the best time to visit.

Best Places in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

What to Wear in Grand Lake in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days.

What To Do in Grand Lake in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

  • Cycling
    10/10
  • Walking
    10/10
  • Camping
    4/10
  • Outdoor sports
    10/10

Grand Lake 3-Day Forecast

More climate data for Grand Lake

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.