September weather forecast
Biddle, MT

Weather in September

September, the first month of the autumn in Biddle, is also a moderately hot month, with an average temperature varying between 54.3°F (12.4°C) and 73.6°F (23.1°C).

Temperature

In Biddle, the average high-temperature in September marginally drops from a warm 82.4°F (28°C) in August to a still moderately hot 73.6°F (23.1°C). The average low-temperature, in Biddle, is 54.3°F (12.4°C).

Humidity

The average relative humidity in September is 44%.

Rainfall

In Biddle, during 10.2 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. Throughout the year, there are 108.9 rainfall days, and 15.59" (396mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Biddle are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.4 snowfall days, it receives 0.31" (8mm) of snow. In Biddle, during the entire year, snow falls for 50.5 days and aggregates up to 19.53" (496mm) of snow.

Daylight

The average length of the day in September in Biddle is 12h and 31min.
On the first day of September in Biddle, Montana, sunrise is at 6:23 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:43 pm MDT.

Sunshine

The average sunshine in September in Biddle is 10.8h.

UV index

In September, the average daily maximum UV index in Biddle is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
Take precautions - Protection against sunburn is recommended. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in September in Biddle?

In September, the average relative humidity in Biddle is 44%.

How many days does it rain in September in Biddle?

In Biddle, in September, during 10.2 rainfall days, 1.02" (26mm) of precipitation is typically accumulated.

When does it start to snow in Biddle?

September is the first month it typically snows. Throughout September, in the average 0.4 snowfall days, it receives 0.31" (8mm) of snow.

How many hours of daylight does Biddle have in September?

In September, the average day length in Biddle is 12h and 31min.

When is the sunrise / sunset in September in Biddle?

On the first day of September in Biddle, sunrise is at 6:23 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:43 pm MDT.

How many hours of sunshine does Biddle have in September?

In September, the average sunshine duration in Biddle, Montana, is 10.8h.

How high is the UV index in September in Biddle?

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health from 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
Biddle, MT

Average temperature in September - Biddle, MT
  • Average high temperature in September: 73.6°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (29.7°F).

  • Average low temperature in September: 54.3°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is February (16.7°F).

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Average pressure in September
Biddle, MT

Average pressure in September - Biddle, MT
  • Average pressure in September: 29.93"Hg

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

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Average wind speed in September
Biddle, MT

Average wind speed in September - Biddle, MT
  • Average wind speed in September: 10.1mph

The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest months (with the lowest average wind speed) are July and August (9.1mph).

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Average humidity in September
Biddle, MT

Average humidity in September - Biddle, MT
  • Average humidity in September: 44%

The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is August (41%).

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Average rainfall in September
Biddle, MT

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

The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is January (0.39").

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Average rainfall days in September
Biddle, MT

Average rainfall days in September - Biddle, MT
  • Average rainfall days in September: 10.2 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (1.5 days).

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Average snowfall in September
Biddle, MT

Average snowfall in September - Biddle, MT
  • Average snowfall in September: 0.31"

The month with the highest snowfall is April (3.82").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in September
Biddle, MT

Average snowfall days in September - Biddle, MT
  • Average snowfall days in September: 0.4 days

The month with the highest number of snowfall days is February (9.1 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
Biddle, MT

Average daylight in September / Average sunshine in September - Biddle, MT
  • Average daylight in September: 12h and 31min

The month with the longest days is June (Average daylight: 15h and 34min).
The month with the shortest days is December (Average daylight: 8h and 50min).

  • Average sunshine in September: 10h and 48min

The months with the most sunshine are July and 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
Biddle, MT

Average sunshine days in September - Biddle, MT
  • Average sunshine days in September: 16.4 days

The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is May (9.3 days).

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Average UV index in September
Biddle, MT

Average UV index in September - Biddle, MT
  • Average UV index in September: 4

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

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Average cloud cover in September
Biddle, MT

Average cloud cover in September - Biddle, MT
  • 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 16).

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Average visibility in September
Biddle, MT

Average visibility in September - Biddle, 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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