September weather forecast
Moose, WY

Share

Weather in September

In September, Moose transitions from the heat of summer to the chill of fall. Precipitation levels rise slightly to 1.97" (50mm), signaling the onset of the coming changes. Daylight hours gradually decrease in anticipation of the approaching autumn season. The temperatures start declining, but the month is still warm and inviting. The changing foliage adds a new hue to the city, creating a picturesque landscape.

Temperature

With September's onset, the weather reveals a slight temperature decrease, transitioning from a pleasant 70.3°F (21.3°C) in August to an enjoyable 62.1°F (16.7°C). September nights bring a significant cooling from the heat of the day, with averages of 37°F (2.8°C).

Humidity

The average relative humidity in September is 57%.

Rainfall

In Moose, during September, the rain falls for 12.2 days and regularly aggregates up to 1.97" (50mm) of precipitation. In Moose, during the entire year, the rain falls for 116.8 days and collects up to 27.95" (710mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 1.5 snowfall days, it receives 1.93" (49mm) of snow. Throughout the year, there are 130.7 snowfall days, and 137.48" (3492mm) of snow is accumulated.

Daylight

The average length of the day in September is 12h and 29min.
On the first day of the month, sunrise is at 6:47 am and sunset at 7:57 pm. On the last day of September, in Moose, sunrise is at 7:20 am and sunset at 7:04 pm MDT.

Sunshine

In Moose, the average sunshine in September is 10h.

UV index

In Moose, the average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 2 translates into the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
[Resources]

Frequently asked questions

What is the average September temperature in Moose?

In September, the average high-temperature and low-temperature in Moose, Wyoming, are 62.1°F (16.7°C) and 37°F (2.8°C) respectively.

What is the average humidity in September in Moose?

In September, the average relative humidity in Moose is 57%.

How many days does it rain in September in Moose?

In Moose, Wyoming, in September, during 12.2 rainfall days, 1.97" (50mm) of precipitation is typically accumulated.

When does it start snowing in Moose?

September is the first month it typically snows in Moose, Wyoming. Throughout September, in the average 1.5 snowfall days, it receives 1.93" (49mm) of snow.

What is the average length of the day in September in Moose?

In Moose, Wyoming, the average day length in September is 12h and 29min.

What time are sunrise and sunset in September in Moose?

In September, on the first day of the month, sunrise is at 6:47 am and sunset at 7:57 pm. On the last day of the month, in Moose, sunrise is at 7:20 am and sunset at 7:04 pm MDT.

How many hours of sunshine does Moose have in September?

In Moose, Wyoming, the average sunshine duration in September is 10h.

What is the UV index reading in September in Moose?

In Moose, Wyoming, the average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Moose, WY

Average temperature in September - Moose, WY
  • Average high temperature in September: 62.1°F

The warmest month (with the highest average high temperature) is July (72°F).
The month with the lowest average high temperature is December (21°F).

  • Average low temperature in September: 37°F

The month with the highest average low temperature is July (43.9°F).
The coldest month (with the lowest average low temperature) is December (4.1°F).

[Resources]

Average pressure in September
Moose, WY

Average pressure in September - Moose, WY
  • Average pressure in September: 29.99"Hg

The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

[Resources]

Average wind speed in September
Moose, WY

Average wind speed in September - Moose, WY
  • Average wind speed in September: 5.2mph

The windiest month (with the highest average wind speed) is June (5.8mph).
The calmest months (with the lowest average wind speed) are January and December (4.5mph).

[Resources]

Average humidity in September
Moose, WY

Average humidity in September - Moose, WY
  • Average humidity in September: 57%

The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is August (50%).

[Resources]

Average rainfall in September
Moose, WY

Average rainfall in September - Moose, WY
  • Average rainfall in September: 1.97"

The wettest month (with the highest rainfall) is February (3.23").
The driest month (with the least rainfall) is August (1.42").

[Resources]

Average rainfall days in September
Moose, WY

Average rainfall days in September - Moose, WY
  • Average rainfall days in September: 12.2 days

The month with the highest number of rainy days is May (16.2 days).
The months with the least rainy days are January and February (3.9 days).

[Resources]

Average snowfall in September
Moose, WY

Average snowfall in September - Moose, WY
  • Average snowfall in September: 1.93"

The month with the highest snowfall is February (25.94").
The months with the least snowfall are July and August (0").

[Resources]

Average snowfall days in September
Moose, WY

Average snowfall days in September - Moose, WY
  • Average snowfall days in September: 1.5 days

The month with the highest number of snowfall days is December (21.7 days).
The month with the least snowfall days is July (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Moose, WY

Average daylight in September / Average sunshine in September - Moose, WY
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in September: 10h and 0min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).

[Resources]

Average sunshine days in September
Moose, WY

Average sunshine days in September - Moose, WY
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is July (15.6 days).
The month with the least sunshine days is April (7 days).

[Resources]

Average UV index in September
Moose, WY

Average UV index in September - Moose, WY
  • Average UV index in September: 2

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).

[Resources]

Average cloud cover in September
Moose, WY

Average cloud cover in September - Moose, WY
  • Average cloud cover in September: 20

The month with the most cloud cover is February (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 15).

[Resources]

Average visibility in September
Moose, WY

Average visibility in September - Moose, WY
  • Average visibility in September: 6mi

The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January and February (2mi).

[Resources]

Moose, Wyoming, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location