September weather forecast
Shawmut, MT

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Weather in September

September, the first month of the autumn in Shawmut, is also an agreeable month, with an average temperature fluctuating between 47.3°F (8.5°C) and 68.4°F (20.2°C).

Temperature

September comes with a drop in the average high-temperature, falling from August's warm 78.4°F (25.8°C) to a pleasant 68.4°F (20.2°C). In September, Shawmut records an average nighttime temperature of 47.3°F (8.5°C).

Humidity

The average relative humidity in September is 49%.

Rainfall

In Shawmut, in September, it is raining for 9.1 days, with typically 0.98" (25mm) of accumulated precipitation. Throughout the year, in Shawmut, there are 133.5 rainfall days, and 13.19" (335mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall in Shawmut. September is the first month it typically snows in Shawmut. Throughout September, in the average 0.5 snowfall days, it receives 0.98" (25mm) of snow. In Shawmut, during the entire year, snow falls for 74.3 days and aggregates up to 33.5" (851mm) of snow.

Daylight

The average length of the day in September in Shawmut, Montana, is 12h and 32min.
On the first day of September in Shawmut, sunrise is at 6:39 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 6:59 pm MDT.

Sunshine

In September, the average sunshine in Shawmut is 10.4h.

UV index

In Shawmut, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum UV index of 4 in September translates into the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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Frequently asked questions

What is the temperature in September in Shawmut?

During September, Shawmut experiences an average high-temperature of 68.4°F (20.2°C) and a low-temperature of 47.3°F (8.5°C).

What is the average humidity in September in Shawmut?

The average relative humidity in September in Shawmut is 49%.

How much does it rain in Shawmut in September?

In Shawmut, Montana, during September, the rain falls for 9.1 days and regularly aggregates up to 0.98" (25mm) of precipitation.

When does it start snowing in Shawmut?

September is the first month it typically snows in Shawmut. Throughout September, in the average 0.5 snowfall days, it receives 0.98" (25mm) of snow.

How many hours of daylight does Shawmut have in September?

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

When is the sunrise / sunset in September in Shawmut?

In September, on the first day of the month, sunrise is at 6:39 am and sunset at 7:56 pm. On the last day of the month, in Shawmut, sunrise is at 7:16 am and sunset at 6:59 pm MDT.

How long on average sun shines in September in Shawmut?

In September, the average sunshine duration in Shawmut, Montana, is 10.4h.

What is the UV index reading in September in Shawmut?

The average daily maximum UV index in September in Shawmut is 4. A UV Index reading of 3 to 5 represents a medium hazard to health 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
Shawmut, MT

Average temperature in September - Shawmut, MT
  • Average high temperature in September: 68.4°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (29.1°F).

  • Average low temperature in September: 47.3°F

The months with the highest average low temperature are July and August (55°F).
The coldest month (with the lowest average low temperature) is February (16.3°F).

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Average pressure in September
Shawmut, MT

Average pressure in September - Shawmut, MT
  • Average pressure in September: 29.95"Hg

The months with the highest atmospheric pressure are January and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed in September
Shawmut, MT

Average wind speed in September - Shawmut, MT
  • Average wind speed in September: 7.8mph

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).

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Average humidity in September
Shawmut, MT

Average humidity in September - Shawmut, MT
  • Average humidity in September: 49%

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

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Average rainfall in September
Shawmut, MT

Average rainfall in September - Shawmut, MT
  • Average rainfall in September: 0.98"

The wettest month (with the highest rainfall) is May (2.4").
The driest months (with the least rainfall) are January and December (0.51").

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Average rainfall days in September
Shawmut, MT

Average rainfall days in September - Shawmut, MT
  • Average rainfall days in September: 9.1 days

The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is December (7.2 days).

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Average snowfall in September
Shawmut, MT

Average snowfall in September - Shawmut, MT
  • Average snowfall in September: 0.98"

The month with the highest snowfall is April (6.73").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in September
Shawmut, MT

Average snowfall days in September - Shawmut, MT
  • Average snowfall days in September: 0.5 days

The month with the highest number of snowfall days is February (14.6 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in September /
Average sunshine in September
Shawmut, MT

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

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

  • Average sunshine in September: 10h and 2min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are February and December (Average sunshine: 6h and 24min).

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Average sunshine days in September
Shawmut, MT

Average sunshine days in September - Shawmut, MT
  • Average sunshine days in September: 18.6 days

The month with the most sunshine days is September (18.6 days).
The month with the least sunshine days is April (7.8 days).

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Average UV index in September
Shawmut, MT

Average UV index in September - Shawmut, 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, October, November and December (UV index 2).

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Average cloud cover in September
Shawmut, MT

Average cloud cover in September - Shawmut, MT
  • Average cloud cover in September: 20

The month with the most cloud cover is February (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 15).

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Average visibility in September
Shawmut, MT

Average visibility in September - Shawmut, 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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Shawmut, Montana, USA

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