September weather forecast and climate
Springdale, MT

Weather in September

September, the first month of the autumn, in Springdale, is also an enjoyable month, with average temperature ranging between max 64.8°F (18.2°C) and min 41.4°F (5.2°C).

Temperature

In September, the average high-temperature drops, from a moderately hot 75°F (23.9°C) in August, to a comfortable 64.8°F (18.2°C). The average low-temperature, in Springdale, is 41.4°F (5.2°C).

Humidity

The average relative humidity in September is 55%.

Rainfall

In Springdale, during 10.6 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. In Springdale, during the entire year, the rain falls for 145.9 days and collects up to 18.27" (464mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall in Springdale, Montana. September is the first month it typically snows in Springdale, Montana. Throughout September, in the average 1 snowfall days, it receives 1.06" (27mm) of snow. Throughout the year, there are 100.5 snowfall days, and 58.7" (1491mm) of snow is accumulated.

Daylight

The average length of the day in Springdale is 12.5h.

Sunshine

In September, the average sunshine in Springdale is 10.1h.

UV index

In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to the UV radiation for average individuals.
Note: The daily maximum UV index of 3 in September interpret into the following advice:
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. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in September in Springdale?

In Springdale, the average relative humidity in September is 55%.

How many days does it rain in September in Springdale?

In Springdale, in September, during 10.6 rainfall days, 1.34" (34mm) of precipitation is typically accumulated.

When does it start snowing in Springdale?

September is the first month it typically snows in Springdale. Throughout September, in the average 1 snowfall days, it receives 1.06" (27mm) of snow.

How many hours of daylight does Springdale have in September?

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

How long on average sun shines in September in Springdale?

In Springdale, Montana, the average sunshine in September is 10.1h.

What is the UV index reading in September in Springdale?

The average daily maximum UV index in September in Springdale is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.

Average temperature in September
Springdale, MT

Average temperature in September - Springdale, MT
  • Average high temperature in September: 64.8°F

The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (25.2°F).

  • Average low temperature in September: 41.4°F

The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is February (11.7°F).

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Average pressure in September
Springdale, MT

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

The month with the highest atmospheric pressure is January (30.18").
The month with the lowest atmospheric pressure is June (29.89").

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Average wind speed in September
Springdale, MT

Average wind speed in September - Springdale, MT
  • Average wind speed in September: 6mph

The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest month (with the lowest average wind speed) is July (5.2mph).

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Average humidity in September
Springdale, MT

Average humidity in September - Springdale, MT
  • Average humidity in September: 55%

The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is August (50%).

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Average rainfall in September
Springdale, MT

Average rainfall in September - Springdale, MT
  • Average rainfall in September: 1.34"

The wettest month (with the highest rainfall) is May (2.56").
The driest months (with the least rainfall) are January and December (1.02").

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Average rainfall days in September
Springdale, MT

Average rainfall days in September - Springdale, MT
  • Average rainfall days in September: 10.6 days

The month with the highest number of rainy days is May (19.5 days).
The month with the least rainy days is December (6.8 days).

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Average snowfall in September
Springdale, MT

Average snowfall in September - Springdale, MT
  • Average snowfall in September: 1.06"

The month with the highest snowfall is March (9.72").
Months with the least snowfall are July and August (0").

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Average snowfall days in September
Springdale, MT

Average snowfall days in September - Springdale, MT
  • Average snowfall days in September: 1 days

The month with the highest number of snowfall days is February (17.9 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
Springdale, MT

Average daylight in September / Average sunshine in September - Springdale, 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: 10.1h

The month with the most sunshine is July (Average sunshine: 11.7h).
The month with the least sunshine is January (Average sunshine: 5.6h).

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Average sunshine days in September
Springdale, MT

Average sunshine days in September - Springdale, MT
  • Average sunshine days in September: 16.8 days

The month with the most sunshine days is September (16.8 days).
The month with the least sunshine days is April (7.1 days).

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Average UV index in September
Springdale, MT

Average UV index in September - Springdale, 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
Springdale, MT

Average cloud cover in September - Springdale, MT
  • Average cloud cover in September: 21

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 16).

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Average visibility in September
Springdale, MT

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

Months with the highest visibility are May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is February (4mi).

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