September weather forecast
Elliston, MT

Weather in September

The first month of the autumn, September, is still a comfortable month in Elliston, Montana, with average temperature varying between 66.2°F (19°C) and 42.4°F (5.8°C).

Temperature

In September, the average high-temperature drops, from a moderately hot 76.6°F (24.8°C) in August, to a comfortable 66.2°F (19°C). The average low-temperature,, is 42.4°F (5.8°C).

Humidity

In September, the average relative humidity is 54%.

Rainfall

In Elliston, during September, the rain falls for 7.6 days and regularly aggregates up to 0.98" (25mm) of precipitation. Throughout the year, there are 106.9 rainfall days, and 13.27" (337mm) of precipitation is accumulated.

Snowfall

January through June, September through December are months with snowfall. September is the first month it typically snows in Elliston, Montana. Throughout September, in the average 1.8 snowfall days, it receives 3.03" (77mm) of snow. Throughout the year, there are 92.7 snowfall days, and 45.59" (1158mm) of snow is accumulated.

Daylight

In Elliston, the average length of the day is 12.5h.

Sunshine

The average sunshine in September is 9.7h.

UV index

The average daily maximum UV index in Elliston is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 Elliston?

The average relative humidity in September in Elliston is 54%.

How much does it rain in Elliston in September?

In Elliston, Montana, in September, it is raining for 7.6 days, with typically 0.98" (25mm) of accumulated precipitation.

When does it start to snow in Elliston?

September is the first month it typically snows in Elliston. Throughout September, in the average 1.8 snowfall days, it receives 3.03" (77mm) of snow.

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

In September, the average length of the day in Elliston, Montana, is 12.5h.

How long on average sun shines in September in Elliston?

The average sunshine in September is 9.7h.

What is the UV index intensity in September in Elliston?

In Elliston, Montana, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to the Sun's UV rays.

Average temperature in September
Elliston, MT

Average temperature in September - Elliston, MT
  • Average high temperature in September: 66.2°F

The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is December (26.2°F).

  • Average low temperature in September: 42.4°F

The month with the highest average low temperature is August (49.3°F).
The coldest month (with the lowest average low temperature) is December (13.1°F).

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Average pressure in September
Elliston, MT

Average pressure in September - Elliston, MT
  • Average pressure in September: 29.98"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.9").

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Average wind speed in September
Elliston, MT

Average wind speed in September - Elliston, MT
  • Average wind speed in September: 6.6mph

The windiest month (with the highest average wind speed) is November (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

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Average humidity in September
Elliston, MT

Average humidity in September - Elliston, MT
  • Average humidity in September: 54%

The month with the highest relative humidity is January (87%).
Months with the lowest relative humidity are July and August (48%).

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Average rainfall in September
Elliston, MT

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

The wettest month (with the highest rainfall) is June (2.6").
The driest months (with the least rainfall) are January and December (0.59").

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Average rainfall days in September
Elliston, MT

Average rainfall days in September - Elliston, MT
  • Average rainfall days in September: 7.6 days

The month with the highest number of rainy days is May (16.1 days).
The month with the least rainy days is January (4.8 days).

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Average snowfall in September
Elliston, MT

Average snowfall in September - Elliston, MT
  • Average snowfall in September: 3.03"

The month with the highest snowfall is February (7.13").
Months with the least snowfall are July and August (0").

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Average snowfall days in September
Elliston, MT

Average snowfall days in September - Elliston, MT
  • Average snowfall days in September: 1.8 days

The month with the highest number of snowfall days is February (15.1 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
Elliston, MT

Average daylight in September / Average sunshine in September - Elliston, MT
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.8h).
The month with the shortest days is December (Average daylight: 8.6h).

  • Average sunshine in September: 9.7h

The month with the most sunshine is July (Average sunshine: 11.8h).
Months with the least sunshine are January and December (Average sunshine: 5.6).

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Average sunshine days in September
Elliston, MT

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

The month with the most sunshine days is July (18.8 days).
The month with the least sunshine days is May (10.6 days).

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Average UV index in September
Elliston, MT

Average UV index in September - Elliston, MT
  • Average UV index in September: 3

Months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is February (UV index 1).

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Average cloud cover in September
Elliston, MT

Average cloud cover in September - Elliston, MT
  • Average cloud cover in September: 22

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 14).

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Average visibility in September
Elliston, MT

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

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

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