September weather forecast and climate
Packers Roost, MT

Weather in September

The first month of the autumn, September, is also an enjoyable month in Packers Roost, Montana, with average temperature ranging between min 37.8°F (3.2°C) and max 61°F (16.1°C).

Temperature

In September, the average high-temperature decreases, from a pleasant 72°F (22.2°C) in August, to a comfortable 61°F (16.1°C). The average low-temperature, in Packers Roost, is 37.8°F (3.2°C).

Humidity

In September, the average relative humidity is 64%.

Rainfall

In Packers Roost, during 8.8 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. In Packers Roost, during the entire year, the rain falls for 118.6 days and collects up to 20.75" (527mm) of precipitation.

Snowfall

Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 1.2 snowfall days, it receives 1.02" (26mm) of snow. Throughout the year, there are 128.7 snowfall days, and 92.13" (2340mm) of snow is accumulated.

Daylight

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

Sunshine

The average sunshine in September is 9.3h.

UV index

In Packers Roost, Montana, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. 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 Packers Roost?

The average high-temperature, in September, in Packers Roost, is 61°F (16.1°C), while the average low-temperature is 37.8°F (3.2°C).

What is the average humidity in September in Packers Roost?

In September, the average relative humidity is 64%.

How much does it rain in Packers Roost in September?

In Packers Roost, during September, the rain falls for 8.8 days and regularly aggregates up to 0.87" (22mm) of precipitation.

When does it start snowing in Packers Roost?

September is the first month it typically snows. Throughout September, in the average 1.2 snowfall days, it receives 1.02" (26mm) of snow.

How many hours of daylight does Packers Roost have in September?

In September, the average length of the day in Packers Roost, Montana, is 12.6h.

How long on average sun shines in September in Packers Roost?

In September, the average sunshine in Packers Roost, Montana, is 9.3h.

What is the UV index intensity in September in Packers Roost?

In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Packers Roost, MT

Average temperature in September - Packers Roost, MT
  • Average high temperature in September: 61°F

The warmest month (with the highest average high temperature) is July (73°F).
The month with the lowest average high temperature is December (23.2°F).

  • Average low temperature in September: 37.8°F

Months with the highest average low temperature are July and August (44.2°F).
The coldest month (with the lowest average low temperature) is February (10.9°F).

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Average pressure in September
Packers Roost, MT

Average pressure in September - Packers Roost, MT
  • Average pressure in September: 29.97"

The month with the highest atmospheric pressure is January (30.15").
The month with the lowest atmospheric pressure is June (29.9").

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Average wind speed in September
Packers Roost, MT

Average wind speed in September - Packers Roost, MT
  • Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is November (7mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in September
Packers Roost, MT

Average humidity in September - Packers Roost, MT
  • Average humidity in September: 64%

The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (56%).

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Average rainfall in September
Packers Roost, MT

Average rainfall in September - Packers Roost, MT
  • Average rainfall in September: 0.87"

The wettest month (with the highest rainfall) is January (2.56").
The driest month (with the least rainfall) is August (0.71").

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Average rainfall days in September
Packers Roost, MT

Average rainfall days in September - Packers Roost, MT
  • Average rainfall days in September: 8.8 days

The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (4.3 days).

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Average snowfall in September
Packers Roost, MT

Average snowfall in September - Packers Roost, MT
  • Average snowfall in September: 1.02"

The month with the highest snowfall is January (20.16").
Months with the least snowfall are July and August (0").

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Average snowfall days in September
Packers Roost, MT

Average snowfall days in September - Packers Roost, MT
  • Average snowfall days in September: 1.2 days

The month with the highest number of snowfall days is December (22.8 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
Packers Roost, MT

Average daylight in September / Average sunshine in September - Packers Roost, 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: 8.4h).

  • Average sunshine in September: 9.3h

The month with the most sunshine is July (Average sunshine: 11.7h).
The month with the least sunshine is January (Average sunshine: 3.1h).

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Average sunshine days in September
Packers Roost, MT

Average sunshine days in September - Packers Roost, MT
  • Average sunshine days in September: 18.4 days

The month with the most sunshine days is August (19.6 days).
The month with the least sunshine days is February (7.2 days).

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Average UV index in September
Packers Roost, MT

Average UV index in September - Packers Roost, MT
  • Average UV index in September: 3

The month with the highest UV index is July (UV index 5).
Months with the lowest UV index are January, February, March, November and December (UV index 1).

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Average cloud cover in September
Packers Roost, MT

Average cloud cover in September - Packers Roost, MT
  • Average cloud cover in September: 27

The month with the most cloud cover is January (Cloud cover 71).
Months with the least cloud cover are July and August (Cloud cover 17).

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Average visibility in September
Packers Roost, MT

Average visibility in September - Packers Roost, MT
  • Average visibility in September: 6mi

Months with the highest visibility are May, June, July, August, September and October (6mi).
Months with the lowest visibility are January, February, March and December (4mi).

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