September weather forecast
Powell, WY

Weather in September

The first month of the autumn, September, is also an agreeable month in Powell, Wyoming, with an average temperature ranging between max 72.1°F (22.3°C) and min 51.1°F (10.6°C).

Temperature

In Powell, the average high-temperature in September decreases from a moderately hot 81.3°F (27.4°C) in August to an agreeable 72.1°F (22.3°C). The average low-temperature, in Powell, is 51.1°F (10.6°C).

Humidity

The average relative humidity in September in Powell is 40%.

Rainfall

In Powell, Wyoming, in September, during 7.1 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. In Powell, during the entire year, the rain falls for 105.7 days and collects up to 8.19" (208mm) of precipitation.

Snowfall

Months with snowfall in Powell are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.16" (4mm) of snow. Throughout the year, there are 52.1 snowfall days, and 16.97" (431mm) of snow is accumulated.

Daylight

The average length of the day in September is 12h and 30min.
On the first day of the month, sunrise is at 6:37 am and sunset at 7:52 pm. On the last day of September, in Powell, sunrise is at 7:12 am and sunset at 6:57 pm MDT.

Sunshine

In September, the average sunshine is 10.8h.

UV index

In Powell, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in September in Powell?

The average relative humidity in September is 40%.

How much does it rain in Powell in September?

In September, in Powell, the rain falls for 7.1 days. Throughout September, 0.71" (18mm) of precipitation is accumulated.

When does it start to snow in Powell?

September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.16" (4mm) of snow.

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

In September, the average day length in Powell, Wyoming, is 12h and 30min.

What time are sunrise and sunset in September in Powell?

On the first day of September in Powell, Wyoming, sunrise is at 6:37 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:57 pm MDT.

How many hours of sunshine does Powell have in September?

The average sunshine duration in September is 10.8h.

How high is the UV index in September in Powell?

In Powell, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Powell, WY

Average temperature in September - Powell, WY
  • Average high temperature in September: 72.1°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is December (29.7°F).

  • Average low temperature in September: 51.1°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is December (15.6°F).

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Average pressure in September
Powell, WY

Average pressure in September - Powell, WY
  • Average pressure in September: 29.97"Hg

The months with the highest atmospheric pressure are January and December (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in September
Powell, WY

Average wind speed in September - Powell, WY
  • Average wind speed in September: 6.7mph

The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).

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Average humidity in September
Powell, WY

Average humidity in September - Powell, WY
  • Average humidity in September: 40%

The month with the highest relative humidity is January (76%).
The months with the lowest relative humidity are July and August (37%).

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Average rainfall in September
Powell, WY

Average rainfall in September - Powell, WY
  • Average rainfall in September: 0.71"

The wettest month (with the highest rainfall) is May (1.5").
The driest month (with the least rainfall) is January (0.31").

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Average rainfall days in September
Powell, WY

Average rainfall days in September - Powell, WY
  • Average rainfall days in September: 7.1 days

The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is December (4.9 days).

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Average snowfall in September
Powell, WY

Average snowfall in September - Powell, WY
  • Average snowfall in September: 0.16"

The month with the highest snowfall is February (3.9").
The months with the least snowfall are July and August (0").

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Average snowfall days in September
Powell, WY

Average snowfall days in September - Powell, WY
  • Average snowfall days in September: 0.2 days

The month with the highest number of snowfall days is February (11 days).
The months with the least snowfall days are July and August (0 days).

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

Average daylight in September / Average sunshine in September - Powell, WY
  • Average daylight in September: 12h and 30min

The month with the longest days is June (Average daylight: 15h and 32min).
The month with the shortest days is December (Average daylight: 8h and 52min).

  • Average sunshine in September: 10h and 48min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 42min).

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Average sunshine days in September
Powell, WY

Average sunshine days in September - Powell, WY
  • Average sunshine days in September: 17.9 days

The month with the most sunshine days is December (21.7 days).
The month with the least sunshine days is May (11.3 days).

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Average UV index in September
Powell, WY

Average UV index in September - Powell, WY
  • Average UV index in September: 4

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in September
Powell, WY

Average cloud cover in September - Powell, WY
  • Average cloud cover in September: 15

The month with the most cloud cover is February (Cloud cover 32).
The month with the least cloud cover is July (Cloud cover 13).

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Average visibility in September
Powell, WY

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

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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