September weather forecast
Osage, WY

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Weather in September

September, the first month of the autumn in Osage, is also an agreeable month, with an average temperature fluctuating between 48.2°F (9°C) and 68.5°F (20.3°C).

Temperature

As Osage enters September, the average high-temperature subtly lowers from the a warm 77.2°F (25.1°C) of August to an agreeable 68.5°F (20.3°C). September nights experience a consistent temperature drop to a chilly 48.2°F (9°C).

Humidity

In Osage, Wyoming, the average relative humidity in September is 54%.

Rainfall

In Osage, in September, it is raining for 10 days, with typically 1.26" (32mm) of accumulated precipitation. Throughout the year, in Osage, Wyoming, there are 123.2 rainfall days, and 19.37" (492mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through June, September through December. September is the first month it typically snows in Osage, Wyoming. Throughout September, in the average 0.8 snowfall days, it receives 0.59" (15mm) of snow. Throughout the year, in Osage, Wyoming, there are 80.3 snowfall days, and 41.38" (1051mm) of snow is accumulated.

Daylight

In September, the average length of the day is 12h and 29min.
On the first day of September, sunrise is at 6:21 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:39 pm MDT.

Sunshine

In Osage, the average sunshine in September is 10.6h.

UV index

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, a regular UV index of 4 translates into these guidelines:
Take necessary precautions - Suggestions to elude sunburn are provided. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
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Frequently asked questions

What is the usual temperature for Osage in September?

In September, the average high-temperature and low-temperature in Osage, Wyoming, are 68.5°F (20.3°C) and 48.2°F (9°C) respectively.

What is the average humidity in September in Osage?

In Osage, Wyoming, the average relative humidity in September is 54%.

How many days does it rain in September in Osage?

In Osage, in September, during 10 rainfall days, 1.26" (32mm) of precipitation is typically accumulated.

When does it start to snow in Osage?

September is the first month it typically snows in Osage, Wyoming. Throughout September, in the average 0.8 snowfall days, it receives 0.59" (15mm) of snow.

How many hours of daylight does Osage have in September?

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

What time are sunrise and sunset in September in Osage?

In September, on the first day of the month, sunrise is at 6:21 am and sunset at 7:32 pm. On the last day of the month, in Osage, sunrise is at 6:55 am and sunset at 6:39 pm MDT.

How many hours of sunshine does Osage have in September?

The average sunshine duration in September in Osage is 10.6h.

What is the UV index intensity in September in Osage?

The average daily maximum UV index in September in Osage is 4. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to the Sun's 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
Osage, WY

Average temperature in September - Osage, WY
  • Average high temperature in September: 68.5°F

The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is December (26.2°F).

  • Average low temperature in September: 48.2°F

The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is February (10.8°F).

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Average pressure in September
Osage, WY

Average pressure in September - Osage, WY
  • Average pressure in September: 29.93"Hg

The months with the highest atmospheric pressure are January and December (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

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Average wind speed in September
Osage, WY

Average wind speed in September - Osage, WY
  • Average wind speed in September: 8.7mph

The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).

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Average humidity in September
Osage, WY

Average humidity in September - Osage, WY
  • Average humidity in September: 54%

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (53%).

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Average rainfall in September
Osage, WY

Average rainfall in September - Osage, WY
  • Average rainfall in September: 1.26"

The wettest months (with the highest rainfall) are June and July (2.68").
The driest month (with the least rainfall) is December (0.67").

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Average rainfall days in September
Osage, WY

Average rainfall days in September - Osage, WY
  • Average rainfall days in September: 10 days

The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (3.7 days).

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Average snowfall in September
Osage, WY

Average snowfall in September - Osage, WY
  • Average snowfall in September: 0.59"

The month with the highest snowfall is April (8.82").
The months with the least snowfall are July and August (0").

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Average snowfall days in September
Osage, WY

Average snowfall days in September - Osage, WY
  • Average snowfall days in September: 0.8 days

The month with the highest number of snowfall days is January (12.8 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
Osage, WY

Average daylight in September / Average sunshine in September - Osage, 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 4min

The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).

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Average sunshine days in September
Osage, WY

Average sunshine days in September - Osage, WY
  • Average sunshine days in September: 15.4 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is June (9.7 days).

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Average UV index in September
Osage, WY

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

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

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Average cloud cover in September
Osage, WY

Average cloud cover in September - Osage, WY
  • Average cloud cover in September: 18

The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 17).

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Average visibility in September
Osage, WY

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

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).

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Osage, Wyoming, USA

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