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Weather in Wyoming for September 2027

Your guide to Wyoming weather in September - trends and predictions

    Snow Forecast ❄️

  • Snowfall in Wyoming during September is quite rare, with fewer than 2 snowy days on average.

    • Temperatures

  • In general, the average temperature in Wyoming at the beginning of September is 19.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.3 °C by the end of September.

    • Rain 🌧️

  • Wyoming experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 62.6 mm.

    • More

  • Is September a good time to visit Wyoming? check out the best time to travel to Wyoming page.

  • ✨ Is September a good time to visit Wyoming? – Ask the AI Weatherman

Average dry days
23
Dry days
Average rainy days
6
Rainy days
Average snowy days
1
Snow days
Average temperatures
16°/5°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
51 %
Avg humidity

Wyoming Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
21°
2
Patchy rain possible
22°
3
Patchy rain possible
18°
4
Sunny
20°
5
Sunny
20°
6
Sunny
21°
7
Patchy rain possible
18°
8
Sunny
19°
9
Sunny
18°
10
Overcast
20°
11
Patchy light drizzle
17°
12
Moderate or heavy snow with thunder
13°
13
Moderate rain
12°
14
Sunny
13°
15
Patchy rain possible
14°
16
Patchy rain possible
15°
17
Light rain
13°
18
Moderate rain
12°
19
Light rain
14°
20
Patchy rain possible
14°
21
Patchy rain possible
15°
22
Light rain
12°
23
Patchy rain possible
13°
24
Sunny
17°
25
Sunny
18°
26
Sunny
16°
27
Sunny
17°
28
Patchy rain possible
17°
29
Partly cloudy
16°
30
Patchy rain possible
12°

What’s the Weather Like in Wyoming This September?

Discover the average temperatures and weather trends across Wyoming’s cities this September.
SunnyYellowstone National Park16 °C / 5 °CPatchy rain possibleCheyenne24 °C / 11 °CSunnySheridan25 °C / 11 °CSunnyJackson18 °C / 6 °CSunnyCasper24 °C / 10 °CSunnyGrand Teton National Park17 °C / 4 °CCloudyEvanston22 °C / 8 °CMore Locations

Temperatures trend during September in Wyoming

See the weather trend as well as the moving average line

September weather in Wyoming day by day

Click on a date for more information
August October
Date Weather Temperatures Rain Snow More
Sept. 1 Sunny
Sunny
 21° /8° 0.9 mm 0 cm
Sept. 2 Patchy rain possible
Patchy rain possible
 22° /7° 0.1 mm 0 cm
Sept. 3 Patchy rain possible
Patchy rain possible
 18° /8° 0.2 mm 0 cm
Sept. 4 Sunny
Sunny
 20° /7° 0 mm 0 cm
Sept. 5 Sunny
Sunny
 20° /7° 0 mm 0 cm
Sept. 6 Sunny
Sunny
 21° /6° 0 mm 0 cm
Sept. 7 Patchy rain possible
Patchy rain possible
 18° /7° 1.8 mm 0 cm
Sept. 8 Sunny
Sunny
 19° /4° 0.2 mm 0 cm
Sept. 9 Sunny
Sunny
 18° /6° 0 mm 0 cm
Sept. 10 Overcast
Overcast
 20° /6° 0 mm 0 cm
Sept. 11 Patchy light drizzle
Patchy light drizzle
 17° /7° 1.4 mm 0 cm
Sept. 12 Moderate or heavy snow with thunder
Moderate or heavy snow with thunder
 13° /3° 5.4 mm 1.9 cm
Sept. 13 Moderate rain
Moderate rain
 12° /4° 19.6 mm 0.1 cm
Sept. 14 Sunny
Sunny
 13° /1° 0.8 mm 0 cm
Sept. 15 Patchy rain possible
Patchy rain possible
 14° /3° 0 mm 0 cm
Sept. 16 Patchy rain possible
Patchy rain possible
 15° /5° 0.7 mm 0 cm
Sept. 17 Light rain
Light rain
 13° /5° 3 mm 0 cm
Sept. 18 Moderate rain
Moderate rain
 12° /2° 14.8 mm 2.9 cm
Sept. 19 Light rain
Light rain
 14° /5° 3.5 mm 0 cm
Sept. 20 Patchy rain possible
Patchy rain possible
 14° /3° 1.3 mm 0 cm
Sept. 21 Patchy rain possible
Patchy rain possible
 15° /5° 1.5 mm 0 cm
Sept. 22 Light rain
Light rain
 12° /3° 2.6 mm 0 cm
Sept. 23 Patchy rain possible
Patchy rain possible
 13° /3° 1 mm 0 cm
Sept. 24 Sunny
Sunny
 17° /4° 0 mm 0 cm
Sept. 25 Sunny
Sunny
 18° /5° 0 mm 0 cm
Sept. 26 Sunny
Sunny
 16° /6° 0 mm 0 cm
Sept. 27 Sunny
Sunny
 17° /3° 0.4 mm 0 cm
Sept. 28 Patchy rain possible
Patchy rain possible
 17° /5° 2.1 mm 0 cm
Sept. 29 Partly cloudy
Partly cloudy
 16° /4° 0 mm 0 cm
Sept. 30 Patchy rain possible
Patchy rain possible
 12° /5° 1.4 mm 0 cm
Next
Important Notice
Our weather forecast for Wyoming in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Wyoming forecast closer to your planned date for the most up-to-date weather information.
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Wyoming in September - FAQ

What are the expected maximum and minimum temperatures in Wyoming during September?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 5°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Wyoming during September?
Moderate rainfall is anticipated in Wyoming during September, with a total of 62.6 mm spread over approximately 6 days. Considering plans for rainy days is advisable.

Will it snow in Wyoming in September 2027?
Wyoming typically sees 4.9 cm of snowfall during September.

What are the typical wind conditions in Wyoming during September?
The average wind speed in Wyoming during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

Wyoming snow forecast September 2027

Track daily snowfall levels and discover Wyoming’s snowy potential this September ❄️
On average, Wyoming sees 1 snowy days during September, with approximately 4.9 cm of total snowfall.

September rainfall patterns in Wyoming

Explore the daily rainfall trends and prepare for Wyomings September weather 💧
Typically, Wyoming has 6 rainy days in September with a total of 62.6 mm of rainfall.

UV exposure in Wyoming during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Counties in Wyoming
Select a county for an accurate weather forecast
Laramie CountyNatrona CountyPark CountySheridan CountyTeton CountyUinta County
Top locations in Wyoming
Select a location for an accurate weather forecast
CasperCheyenneEvanstonGrand Teton National ParkJacksonSheridanYellowstone National Park
More Locations
Quick links
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