Thermopolis
Weather by month
Current –

Thermopolis Weather in September

September in Thermopolis brings high temperatures, with highs of 26°C (79°F) and nights dropping to 7°C (45°F). With excellent weather conditions overall, it's a good time to visit.

Rainfall in Thermopolis in September

Typically, about 6 days will experience rainfall, with an average of 28 mm (1.1 in) for the month. When rain does fall, showers tend to be light and brief. Most days will be dry.

Temperature in Thermopolis in September

September is one of the better months to visit Thermopolis. Expect 26°C (79°F) during the day and 7°C (45°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. At 7°C (45°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June and September typically offer the best weather for Thermopolis.

Thermopolis Temperature in September

Min Temperature
7°C (45°F)
Max Temperature
26°C (79°F)
Chance of Rain
20%
Precipitation
28 mm (1.1 in)
Rainy days
6 days

Thermopolis Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Thermopolis - 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 Thermopolis in September

Warm but pleasant conditions in Thermopolis in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Light rain is possible, so consider bringing a small umbrella or rain jacket.

What To Do in Thermopolis in September

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

  • Cycling
    8/10
  • Walking
    8/10
  • Camping
    5/10
  • Outdoor sports
    8/10

Thermopolis 3-Day Forecast

More climate data for Thermopolis

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.