September weather forecast and climate
Sheridan, WY

What is the temperature in September in Sheridan?

The average high-temperature, in September, in Sheridan, Wyoming, is 74.1°F (23.4°C), while the average low-temperature is 41.5°F (5.3°C).

How many days does it rain in September in Sheridan?

In Sheridan, Wyoming, during September, the rain falls for 7 days and regularly aggregates up to 1.4" (36.3mm) of precipitation.

When does it start to snow in Sheridan?

September is the first month it typically snows. Throughout September, in the average 1 snowfall days, it receives 2.8" (71.1mm) of snow.
Average temperature in September - Sheridan, WY
  • Average high temperature in September: 74.2°F

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is December (35.2°F).

  • Average low temperature in September: 41.6°F

The month with the highest average low temperature is July (53°F).
The coldest month (with the lowest average low temperature) is December (10.6°F).

Average rainfall in September - Sheridan, WY
  • Average rainfall in September: 1.4"

The wettest month (with the highest rainfall) is May (2.4").
The driest month (with the lowest rainfall) is February (0.5").

Average rainfall days in September - Sheridan, WY
  • Average rainfall days in September: 7 days

The month with the highest number of rainy days is May (11.9 days).
The month with the lowest number of rainy days is August (6.3 days).

Average snowfall in September - Sheridan, WY
  • Average snowfall in September: 2.8"

The month with the highest snowfall is December (11.7").
Months with the lowest snowfall are June, July and August (0").

Average snowfall days in September - Sheridan, WY
  • Average snowfall days in September: 1 days

Months with the highest number of snowfall days are March and December (8 days).
Months with the lowest number of snowfall days are July and August (0 days).

Average daylight in September / Average sunshine in September - Sheridan, WY
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.5h).
The month with shortest days is December (Average daylight: 8.9h).

  • Average sunshine in September: 8.5h

The month with most sunshine is July (Average sunshine: 11.3h).
The month with least sunshine is December (Average sunshine: 4.8h).

Average UV index in September - Sheridan, WY
  • Average UV index in September: 6

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January and December (UV index 1).

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