September weather forecast
Walkerville, MT

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Weather in September

The first month of the autumn, September, is still a comfortable month in Walkerville, Montana, with an average temperature fluctuating between 64.9°F (18.3°C) and 40.1°F (4.5°C).

Temperature

The decrease of average high-temperatures is mild in September, with a decline from a moderately hot 74.8°F (23.8°C) in August to a comfortable 64.9°F (18.3°C). Despite drastic daytime highs, Walkerville logs an average low-temperature reading of 40.1°F (4.5°C) throughout September.

Humidity

The average relative humidity in September is 54%.

Rainfall

In Walkerville, Montana, in September, it is raining for 8.5 days, with typically 1.06" (27mm) of accumulated precipitation. Throughout the year, there are 102.5 rainfall days, and 13.74" (349mm) of precipitation is accumulated.

Snowfall

January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 1.1 snowfall days, it receives 1.65" (42mm) of snow. In Walkerville, Montana, during the entire year, snow falls for 103.1 days and aggregates up to 52.56" (1335mm) of snow.

Daylight

The average length of the day in September in Walkerville is 12h and 31min.
On the first day of the month, sunrise is at 6:51 am and sunset at 8:07 pm. On the last day of September, in Walkerville, sunrise is at 7:28 am and sunset at 7:11 pm MDT.

Sunshine

The average sunshine in September is 9.5h.

UV index

In Walkerville, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.
Note: A typical high UV index of 3 in September suggests the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
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Frequently asked questions

What are the temperatures in Walkerville in September?

The high-temperature in Walkerville, Montana, during September is 64.9°F (18.3°C) and the low-temperature is 40.1°F (4.5°C).

What is the average humidity in September in Walkerville?

In September, the average relative humidity in Walkerville is 54%.

How many days does it rain in September in Walkerville?

In September, the rain falls for 8.5 days. Throughout September, 1.06" (27mm) of precipitation is accumulated.

When does it start snowing in Walkerville?

September is the first month it typically snows in Walkerville. Throughout September, in the average 1.1 snowfall days, it receives 1.65" (42mm) of snow.

How many hours of daylight does Walkerville have in September?

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

When are sunrise and sunset in September in Walkerville?

On the first day of September in Walkerville, Montana, sunrise is at 6:51 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 7:11 pm MDT.

How many hours of sunshine does Walkerville have in September?

In Walkerville, Montana, the average sunshine duration in September is 9.5h.

What is the UV index intensity in September in Walkerville?

The average daily maximum UV index in September in Walkerville is 3. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
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
Walkerville, MT

Average temperature in September - Walkerville, MT
  • Average high temperature in September: 64.9°F

The warmest month (with the highest average high temperature) is July (76.5°F).
The month with the lowest average high temperature is December (25.2°F).

  • Average low temperature in September: 40.1°F

The month with the highest average low temperature is July (46.9°F).
The coldest month (with the lowest average low temperature) is December (9°F).

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Average pressure in September
Walkerville, MT

Average pressure in September - Walkerville, MT
  • Average pressure in September: 29.99"Hg

The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in September
Walkerville, MT

Average wind speed in September - Walkerville, MT
  • Average wind speed in September: 5.6mph

The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is August (5mph).

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Average humidity in September
Walkerville, MT

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

The months with the highest relative humidity are January, February and December (87%).
The month with the lowest relative humidity is July (48%).

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Average rainfall in September
Walkerville, MT

Average rainfall in September - Walkerville, MT
  • Average rainfall in September: 1.06"

The wettest month (with the highest rainfall) is May (2.24").
The driest months (with the least rainfall) are January, November and December (0.67").

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Average rainfall days in September
Walkerville, MT

Average rainfall days in September - Walkerville, MT
  • Average rainfall days in September: 8.5 days

The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is November (4.1 days).

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Average snowfall in September
Walkerville, MT

Average snowfall in September - Walkerville, MT
  • Average snowfall in September: 1.65"

The month with the highest snowfall is March (8.74").
The months with the least snowfall are July and August (0").

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Average snowfall days in September
Walkerville, MT

Average snowfall days in September - Walkerville, MT
  • Average snowfall days in September: 1.1 days

The month with the highest number of snowfall days is February (17.7 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
Walkerville, MT

Average daylight in September / Average sunshine in September - Walkerville, 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: 9h and 3min

The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

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Average sunshine days in September
Walkerville, MT

Average sunshine days in September - Walkerville, MT
  • Average sunshine days in September: 18.9 days

The month with the most sunshine days is August (19.1 days).
The month with the least sunshine days is April (9.8 days).

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Average UV index in September
Walkerville, MT

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

The month with the highest UV index is 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
Walkerville, MT

Average cloud cover in September - Walkerville, MT
  • Average cloud cover in September: 23

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 16).

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Average visibility in September
Walkerville, MT

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

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

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Walkerville, Montana, USA

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