September weather forecast
Silver Star, MT

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Weather in September

The first month of the autumn, September, is still a refreshing month in Silver Star, Montana, with an average temperature fluctuating between 67.6°F (19.8°C) and 41.2°F (5.1°C).

Temperature

The beginning of September involves a decrease in the average high-temperature, transitioning from a moderately hot 78.3°F (25.7°C) in August to a comfortable 67.6°F (19.8°C). Despite drastic daily temperature oscillations, Silver Star cools down to an average low-temperature of 41.2°F (5.1°C) in September.

Humidity

In Silver Star, the average relative humidity in September is 52%.

Rainfall

In Silver Star, in September, during 10.3 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. In Silver Star, Montana, during the entire year, the rain falls for 158 days and collects up to 12.2" (310mm) of precipitation.

Snowfall

May through September are months without snowfall in Silver Star.

Daylight

In Silver Star, the average length of the day in September is 12h and 31min.
On the first day of the month, sunrise is at 6:51 am and sunset at 8:06 pm. On the last day of September, sunrise is at 7:27 am and sunset at 7:10 pm MDT.

Sunshine

The average sunshine in September is 9.8h.

UV index

In Silver Star, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: An average UV index of 3 in September transforms into this advice:
Put precautions into practice - Guidance to elude sunburn is provided. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Opt for tightly woven and loose clothing to enhance protection from the Sun.
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Frequently asked questions

What is the usual temperature for Silver Star in September?

The average high-temperature, in September, in Silver Star, is 67.6°F (19.8°C), while the average low-temperature is 41.2°F (5.1°C).

What is the average humidity in September in Silver Star?

The average relative humidity in September in Silver Star, Montana, is 52%.

How many days does it rain in September in Silver Star?

In September, in Silver Star, the rain falls for 10.3 days. Throughout September, 0.98" (25mm) of precipitation is accumulated.

When it does not snow in Silver Star?

May through September are months without snowfall in Silver Star.

Does it snow in Silver Star in September?

In Silver Star, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Silver Star?

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

When is the sunrise / sunset in September in Silver Star?

In September, on the first day of the month, sunrise is at 6:51 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 7:10 pm MDT.

How long on average sun shines in September in Silver Star?

In Silver Star, Montana, the average sunshine duration in September is 9.8h.

What is the UV index reading in September in Silver Star?

In Silver Star, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Silver Star, MT

Average temperature in September - Silver Star, MT
  • Average high temperature in September: 67.6°F

The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is December (26.4°F).

  • Average low temperature in September: 41.2°F

The month with the highest average low temperature is July (47.7°F).
The coldest month (with the lowest average low temperature) is December (11.3°F).

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Average pressure in September
Silver Star, MT

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

The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in September
Silver Star, MT

Average wind speed in September - Silver Star, MT
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is November (6.3mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).

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Average humidity in September
Silver Star, MT

Average humidity in September - Silver Star, MT
  • Average humidity in September: 52%

The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are July and August (46%).

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Average rainfall in September
Silver Star, MT

Average rainfall in September - Silver Star, MT
  • Average rainfall in September: 0.98"

The wettest month (with the highest rainfall) is May (1.85").
The driest month (with the least rainfall) is January (0.59").

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Average rainfall days in September
Silver Star, MT

Average rainfall days in September - Silver Star, MT
  • Average rainfall days in September: 10.3 days

The month with the highest number of rainy days is April (18.6 days).
The month with the least rainy days is August (8.6 days).

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Average snowfall in September
Silver Star, MT

Average snowfall in September - Silver Star, MT
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.81").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Silver Star, MT

Average snowfall days in September - Silver Star, MT
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (6.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Silver Star, MT

Average daylight in September / Average sunshine in September - Silver Star, 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 48min).

  • Average sunshine in September: 9h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days in September
Silver Star, MT

Average sunshine days in September - Silver Star, MT
  • Average sunshine days in September: 16.4 days

The month with the most sunshine days is July (17.8 days).
The month with the least sunshine days is April (7.8 days).

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Average UV index in September
Silver Star, MT

Average UV index in September - Silver Star, MT
  • Average UV index in September: 3

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

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Average cloud cover in September
Silver Star, MT

Average cloud cover in September - Silver Star, MT
  • Average cloud cover in September: 19

The month with the most cloud cover is February (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 14).

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Average visibility in September
Silver Star, MT

Average visibility in September - Silver Star, MT
  • Average visibility in September: 6mi

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

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Silver Star, Montana, USA

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