September weather forecast and climate
Thoeny, MT

Weather in September

The first month of the autumn, September, is still a pleasant month in Thoeny, Montana, with average temperature fluctuating between 53.2°F (11.8°C) and 71.1°F (21.7°C).

Temperature

In September, the average high-temperature decreases, from a moderately hot 82.8°F (28.2°C) in August, to an agreeable 71.1°F (21.7°C). In Thoeny, the average low-temperature is 53.2°F (11.8°C).

Humidity

In September, the average relative humidity in Thoeny, Montana, is 46%.

Rainfall

In Thoeny, during September, the rain falls for 8.1 days and regularly aggregates up to 1.1" (28mm) of precipitation. In Thoeny, during the entire year, the rain falls for 91.8 days and collects up to 10.63" (270mm) of precipitation.

Snowfall

June through September are months without snowfall in Thoeny, Montana.

Daylight

In Thoeny, the average length of the day in September is 12.6h.

Sunshine

In Thoeny, the average sunshine in September is 9.8h.

UV index

In Thoeny, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against the 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. 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 temperature in September in Thoeny?

In Thoeny, Montana, in September, the average high-temperature is 71.1°F (21.7°C), and the average low-temperature is 53.2°F (11.8°C).

What is the average humidity in September in Thoeny?

In Thoeny, Montana, the average relative humidity in September is 46%.

How much does it rain in Thoeny in September?

In Thoeny, during September, the rain falls for 8.1 days and regularly aggregates up to 1.1" (28mm) of precipitation.

Does it snow in Thoeny in September?

In Thoeny, Montana, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Thoeny?

June through September are months without snowfall in Thoeny.

How many hours of daylight does Thoeny have in September?

In September, the average length of the day in Thoeny is 12.6h.

How long on average sun shines in September in Thoeny?

In September, the average sunshine in Thoeny is 9.8h.

What is the UV index intensity in September in Thoeny?

In September, the average daily maximum UV index in Thoeny is 4. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to the UV radiation.

Average temperature in September
Thoeny, MT

Average temperature in September - Thoeny, MT
  • Average high temperature in September: 71.1°F

The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is February (24.4°F).

  • Average low temperature in September: 53.2°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 (10°F).

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Average pressure in September
Thoeny, MT

Average pressure in September - Thoeny, MT
  • Average pressure in September: 29.92"

The month with the highest atmospheric pressure is February (30.15").
The month with the lowest atmospheric pressure is June (29.83").

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Average wind speed in September
Thoeny, MT

Average wind speed in September - Thoeny, MT
  • Average wind speed in September: 10mph

The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is February (8.3mph).

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Average humidity in September
Thoeny, MT

Average humidity in September - Thoeny, MT
  • Average humidity in September: 46%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (41%).

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Average rainfall in September
Thoeny, MT

Average rainfall in September - Thoeny, MT
  • Average rainfall in September: 1.1"

The wettest month (with the highest rainfall) is May (1.73").
The driest month (with the least rainfall) is February (0.43").

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Average rainfall days in September
Thoeny, MT

Average rainfall days in September - Thoeny, MT
  • Average rainfall days in September: 8.1 days

The month with the highest number of rainy days is May (12.7 days).
The month with the least rainy days is February (3.3 days).

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Average snowfall in September
Thoeny, MT

Average snowfall in September - Thoeny, MT
  • Average snowfall in September: 0"

The month with the highest snowfall is December (3.43").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Thoeny, MT

Average snowfall days in September - Thoeny, MT
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is January (12.3 days).
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
Thoeny, MT

Average daylight in September / Average sunshine in September - Thoeny, MT
  • Average daylight in September: 12.6h

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.3h).

  • Average sunshine in September: 9.8h

The month with the most sunshine is July (Average sunshine: 11.7h).
The month with the least sunshine is February (Average sunshine: 4.6h).

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Average sunshine days in September
Thoeny, MT

Average sunshine days in September - Thoeny, MT
  • Average sunshine days in September: 20.6 days

The month with the most sunshine days is October (21 days).
The month with the least sunshine days is April (15.4 days).

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Average UV index in September
Thoeny, MT

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

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average cloud cover in September
Thoeny, MT

Average cloud cover in September - Thoeny, MT
  • Average cloud cover in September: 26

The month with the most cloud cover is February (Cloud cover 50).
Months with the least cloud cover are July and August (Cloud cover 18).

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Average visibility in September
Thoeny, MT

Average visibility in September - Thoeny, MT
  • Average visibility in September: 6mi

Months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

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