September weather forecast and climate
Walkerville, MT

Weather in September

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

Temperature

In September, the average high-temperature decreases, from a moderately hot 74.8°F (23.8°C) in August, to a comfortable 64.9°F (18.3°C). The average low-temperature, in Walkerville, is 40.1°F (4.5°C).

Humidity

The average relative humidity in Walkerville is 54%.

Rainfall

In Walkerville, in September, during 8.5 rainfall days, 1.06" (27mm) of precipitation is typically accumulated. In Walkerville, during the entire year, the rain falls for 102.5 days and collects up to 13.74" (349mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall in Walkerville. September is the first month it typically snows. Throughout September, in the average 1.1 snowfall days, it receives 1.65" (42mm) of snow. Throughout the year, there are 103.1 snowfall days, and 52.56" (1335mm) of snow is accumulated.

Daylight

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

Sunshine

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

UV index

In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to the 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 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 Walkerville?

In Walkerville, Montana, in September, the average high-temperature is 64.9°F (18.3°C), and the average 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, Montana, is 54%.

How much does it rain in Walkerville in September?

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

When does it start to snow 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.

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

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

How many hours of sunshine does Walkerville have in September?

In September, the average sunshine 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 value of 3 to 5 symbolizes a moderate health threat from unsafe exposure to the Sun's UV rays.

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"

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

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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%

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").
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).
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: 12.5h

The month with the longest days is June (Average daylight: 15.7h).
The month with the shortest days is December (Average daylight: 8.7h).

  • Average sunshine in September: 9.5h

The month with the most sunshine is July (Average sunshine: 11.5h).
The month with the least sunshine is December (Average sunshine: 5.3h).

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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

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

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