September weather forecast
Buffalo, MT

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Weather in September

The first month of the autumn, September, is still a refreshing month in Buffalo, Montana, with temperature in the range of an average high of 67.5°F (19.7°C) and an average low of 47.1°F (8.4°C).

Temperature

Buffalo observes a minor decrease in the average high-temperature with the arrival of September, falling from August's moderately hot 78.1°F (25.6°C) to an enjoyable 67.5°F (19.7°C). During the nights in September, an average low-temperature of 47.1°F (8.4°C) is observed.

Humidity

In Buffalo, the average relative humidity in September is 52%.

Rainfall

In Buffalo, in September, it is raining for 8.7 days, with typically 1.02" (26mm) of accumulated precipitation. In Buffalo, during the entire year, the rain falls for 126.2 days and collects up to 17.83" (453mm) of precipitation.

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 1 snowfall days, it receives 1.3" (33mm) of snow. Throughout the year, there are 83.4 snowfall days, and 45.51" (1156mm) of snow is accumulated.

Daylight

The average length of the day in September in Buffalo is 12h and 32min.
On the first day of the month, sunrise is at 6:40 am and sunset at 7:58 pm. On the last day of September, sunrise is at 7:17 am and sunset at 7:00 pm MDT.

Sunshine

In September, the average sunshine in Buffalo, Montana, is 10h.

UV index

The average daily maximum UV index in September in Buffalo is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.
Note: In September, the maximum UV index of 4 suggests these recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
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Frequently asked questions

What are September temperatures in Buffalo?

The average high-temperature, in September, in Buffalo, is 67.5°F (19.7°C), while the average low-temperature is 47.1°F (8.4°C).

What is the average humidity in September in Buffalo?

The average relative humidity in September in Buffalo, Montana, is 52%.

How many days does it rain in September in Buffalo?

In Buffalo, Montana, in September, during 8.7 rainfall days, 1.02" (26mm) of precipitation is typically accumulated.

When does it start snowing in Buffalo?

September is the first month it typically snows in Buffalo, Montana. Throughout September, in the average 1 snowfall days, it receives 1.3" (33mm) of snow.

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

In September, the average day length in Buffalo, Montana, is 12h and 32min.

What time are sunrise and sunset in September in Buffalo?

In September, on the first day of the month, sunrise is at 6:40 am and sunset at 7:58 pm. On the last day of the month, in Buffalo, sunrise is at 7:17 am and sunset at 7:00 pm MDT.

How long on average sun shines in September in Buffalo?

The average sunshine duration in September is 10h.

What is the UV index reading in September in Buffalo?

In Buffalo, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
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
Buffalo, MT

Average temperature in September - Buffalo, MT
  • Average high temperature in September: 67.5°F

The warmest month (with the highest average high temperature) is July (78.8°F).
The months with the lowest average high temperature are February and December (29.1°F).

  • Average low temperature in September: 47.1°F

The month with the highest average low temperature is August (54.5°F).
The coldest month (with the lowest average low temperature) is February (15.3°F).

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Average pressure in September
Buffalo, MT

Average pressure in September - Buffalo, MT
  • Average pressure in September: 29.94"Hg

The month with the highest atmospheric pressure is January (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, MT

Average wind speed in September - Buffalo, MT
  • Average wind speed in September: 8.5mph

The windiest months (with the highest average wind speed) are January, April and October (9.9mph).
The calmest month (with the lowest average wind speed) is August (7.4mph).

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Average humidity in September
Buffalo, MT

Average humidity in September - Buffalo, MT
  • Average humidity in September: 52%

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is August (47%).

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Average rainfall in September
Buffalo, MT

Average rainfall in September - Buffalo, MT
  • Average rainfall in September: 1.02"

The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is December (0.71").

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Average rainfall days in September
Buffalo, MT

Average rainfall days in September - Buffalo, MT
  • Average rainfall days in September: 8.7 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (5.4 days).

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Average snowfall in September
Buffalo, MT

Average snowfall in September - Buffalo, MT
  • Average snowfall in September: 1.3"

The month with the highest snowfall is April (9.13").
The months with the least snowfall are July and August (0").

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Average snowfall days in September
Buffalo, MT

Average snowfall days in September - Buffalo, MT
  • Average snowfall days in September: 1 days

The month with the highest number of snowfall days is February (15.2 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, MT

Average daylight in September / Average sunshine in September - Buffalo, MT
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in September: 10h and 0min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).

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Average sunshine days in September
Buffalo, MT

Average sunshine days in September - Buffalo, MT
  • Average sunshine days in September: 19.3 days

The month with the most sunshine days is September (19.3 days).
The month with the least sunshine days is April (8.3 days).

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Average UV index in September
Buffalo, MT

Average UV index in September - Buffalo, MT
  • 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, MT

Average cloud cover in September - Buffalo, MT
  • Average cloud cover in September: 23

The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 16).

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Average visibility in September
Buffalo, MT

Average visibility in September - Buffalo, MT
  • 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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Buffalo, Montana, USA

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