September weather forecast
Buffalo, WY

Weather in September

The first month of the autumn, September, is also an agreeable month in Buffalo, Wyoming, with an average temperature ranging between max 68.2°F (20.1°C) and min 49.1°F (9.5°C).

Temperature

In Buffalo, the average high-temperature in September decreases from a warm 77.2°F (25.1°C) in August to a pleasant 68.2°F (20.1°C). In Buffalo, the average low-temperature is 49.1°F (9.5°C).

Humidity

In September, the average relative humidity is 47%.

Rainfall

In Buffalo, Wyoming, it is raining for 11.8 days, with typically 1.34" (34mm) of accumulated precipitation. Throughout the year, there are 145.3 rainfall days, and 18.78" (477mm) of precipitation is accumulated.

Snowfall

January through June, September through December are months with snowfall. September is the first month it typically snows in Buffalo. Throughout September, in the average 0.5 snowfall days, it receives 0.94" (24mm) of snow. Throughout the year, in Buffalo, there are 78 snowfall days, and 39.13" (994mm) of snow is accumulated.

Daylight

In Buffalo, the average length of the day in September is 12h and 30min.
On the first day of the month, sunrise is at 6:30 am and sunset at 7:43 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:49 pm MDT.

Sunshine

In September, the average sunshine is 10.9h.

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 average person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. 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 Buffalo?

In September, the average relative humidity in Buffalo, Wyoming, is 47%.

How much does it rain in Buffalo in September?

In Buffalo, in September, it is raining for 11.8 days, with typically 1.34" (34mm) of accumulated precipitation.

When does it start snowing in Buffalo?

September is the first month it typically snows in Buffalo, Wyoming. Throughout September, in the average 0.5 snowfall days, it receives 0.94" (24mm) of snow.

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

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

What time are sunrise and sunset in September in Buffalo?

In September, on the first day of the month, sunrise is at 6:30 am and sunset at 7:43 pm. On the last day of the month, in Buffalo, Wyoming, sunrise is at 7:03 am and sunset at 6:49 pm MDT.

How long on average sun shines in September in Buffalo?

In September, the average sunshine duration in Buffalo is 10.9h.

What is the UV index intensity in September in Buffalo?

In Buffalo, Wyoming, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Buffalo, WY

Average temperature in September - Buffalo, WY
  • Average high temperature in September: 68.2°F

The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is February (28.9°F).

  • Average low temperature in September: 49.1°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 (14°F).

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Average pressure in September
Buffalo, WY

Average pressure in September - Buffalo, 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 (29.85"Hg).

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Average wind speed in September
Buffalo, WY

Average wind speed in September - Buffalo, WY
  • Average wind speed in September: 6.4mph

The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is August (6mph).

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Average humidity in September
Buffalo, WY

Average humidity in September - Buffalo, WY
  • Average humidity in September: 47%

The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is August (44%).

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Average rainfall in September
Buffalo, WY

Average rainfall in September - Buffalo, WY
  • Average rainfall in September: 1.34"

The wettest month (with the highest rainfall) is May (3.35").
The driest month (with the least rainfall) is December (0.47").

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Average rainfall days in September
Buffalo, WY

Average rainfall days in September - Buffalo, WY
  • Average rainfall days in September: 11.8 days

The month with the highest number of rainy days is May (21.2 days).
The month with the least rainy days is December (5 days).

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Average snowfall in September
Buffalo, WY

Average snowfall in September - Buffalo, WY
  • Average snowfall in September: 0.94"

The month with the highest snowfall is April (7.05").
The months with the least snowfall are July and August (0").

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Average snowfall days in September
Buffalo, WY

Average snowfall days in September - Buffalo, WY
  • Average snowfall days in September: 0.5 days

The month with the highest number of snowfall days is February (13.7 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
Buffalo, WY

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

The month with the longest days is June (Average daylight: 15h and 28min).
The month with the shortest days is December (Average daylight: 8h and 55min).

  • Average sunshine in September: 10h and 54min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 18min).

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Average sunshine days in September
Buffalo, WY

Average sunshine days in September - Buffalo, WY
  • Average sunshine days in September: 14.2 days

The month with the most sunshine days is December (19.4 days).
The month with the least sunshine days is May (5.5 days).

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Average UV index in September
Buffalo, WY

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

The month with the highest UV index is July (UV index 6).
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
Buffalo, WY

Average cloud cover in September - Buffalo, WY
  • Average cloud cover in September: 17

The month with the most cloud cover is April (Cloud cover 38).
The months with the least cloud cover are July and September (Cloud cover 17).

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Average visibility in September
Buffalo, WY

Average visibility in September - Buffalo, 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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