September weather forecast and climate
Buffalo, WY

Weather in September

September, the first month of the autumn, in Buffalo, is still a pleasant month, with 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, Wyoming,, the average low-temperature is 49.1°F (9.5°C).

Humidity

In Buffalo, the average relative humidity is 47%.

Rainfall

In Buffalo, during September, the rain falls for 11.8 days and regularly aggregates up to 1.34" (34mm) of precipitation. Throughout the year, in Buffalo, there are 145.3 rainfall days, and 18.78" (477mm) of precipitation is accumulated.

Snowfall

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

Daylight

The average length of the day in Buffalo is 12.5h.

Sunshine

In Buffalo, the average sunshine is 10.9h.

UV index

In Buffalo, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 4 transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. 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 many days does it rain in September in Buffalo?

In Buffalo, in September, during 11.8 rainfall days, 1.34" (34mm) of precipitation is typically accumulated.

When does it start snowing in Buffalo?

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

How many hours of daylight does Buffalo have in September?

In Buffalo, Wyoming, the average length of the day in September is 12.5h.

How long on average sun shines in September in Buffalo?

The average sunshine in September in Buffalo, Wyoming, is 10.9h.

What is the UV index reading in September in Buffalo?

In Buffalo, Wyoming, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in September
Buffalo, WY

Average temperature in September - Buffalo, WY
  • Average high temperature in September: 20.1°C

The warmest month (with the highest average high temperature) is July (26°C).
The month with the lowest average high temperature is February (-1.7°C).

  • Average low temperature in September: 9.5°C

The month with the highest average low temperature is July (14.3°C).
The coldest month (with the lowest average low temperature) is February (-10°C).

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Average pressure in September
Buffalo, WY

Average pressure in September - Buffalo, WY
  • Average pressure in September: 1013.7mbar

The month with the highest atmospheric pressure is January (1020.4mbar).
The month with the lowest atmospheric pressure is June (1010.8mbar).

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Average wind speed in September
Buffalo, WY

Average wind speed in September - Buffalo, WY
  • Average wind speed in September: 10.3km/h

The windiest month (with the highest average wind speed) is April (12.5km/h).
The calmest month (with the lowest average wind speed) is August (9.7km/h).

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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: 34mm

The wettest month (with the highest rainfall) is May (85mm).
The driest month (with the least rainfall) is December (12mm).

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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: 24mm

The month with the highest snowfall is April (179mm).
Months with the least snowfall are July and August (0mm).

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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).
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: 12.5h

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

  • Average sunshine in September: 10.9h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 6.3h).

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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).
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).
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: 10km

Months with the highest visibility are June, July, August, September and October (10km).
Months with the lowest visibility are January, February, March, April, May, November and December (9km).

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