September weather forecast
Epsie, MT

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Weather in September

The first month of the autumn, September, is still a warm month in Epsie, Montana, with an average temperature varying between 73.8°F (23.2°C) and 53.2°F (11.8°C).

Temperature

September shows a mild decline in the average high-temperature, falling from August's moderately hot 83.3°F (28.5°C) to a still warm 73.8°F (23.2°C). Throughout September, the average low-temperature in Epsie records at a fresh 53.2°F (11.8°C).

Humidity

In September, the average relative humidity is 45%.

Rainfall

In September, the rain falls for 10.3 days. Throughout September, 1.38" (35mm) of precipitation is accumulated. Throughout the year, there are 113.9 rainfall days, and 14.84" (377mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.16" (4mm) of snow. Throughout the year, in Epsie, there are 55.2 snowfall days, and 23.5" (597mm) of snow is accumulated.

Daylight

In Epsie, Montana, the average length of the day in September is 12h and 31min.
On the first day of September in Epsie, sunrise is at 6:25 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:44 pm MDT.

Sunshine

In Epsie, Montana, the average sunshine in September is 10.4h.

UV index

In Epsie, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum high daily UV index of 4 during September translates into the following directions:
Undertake precautions - It is suggested to shield oneself from sunburn. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
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Frequently asked questions

What is the usual temperature for Epsie in September?

The high-temperature, in September, in Epsie, is 73.8°F (23.2°C), while the low-temperature averages to 53.2°F (11.8°C). In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is evaluated at 82.4°F (28°C).

What is the average humidity in September in Epsie?

The average relative humidity in September is 45%.

How many days does it rain in September in Epsie?

In September, in Epsie, Montana, the rain falls for 10.3 days. Throughout September, 1.38" (35mm) of precipitation is accumulated.

When does it start to snow in Epsie?

September is the first month it typically snows in Epsie, Montana. Throughout September, in the average 0.2 snowfall days, it receives 0.16" (4mm) of snow.

How many hours of daylight does Epsie have in September?

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

When is the sunrise / sunset in September in Epsie?

In September, on the first day of the month, sunrise is at 6:25 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:44 pm MDT.

How many hours of sunshine does Epsie have in September?

In Epsie, Montana, the average sunshine duration in September is 10.4h.

What is the UV index reading in September in Epsie?

In Epsie, Montana, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
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
Epsie, MT

Average temperature in September - Epsie, MT
  • Average high temperature in September: 73.8°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is December (30.4°F).

  • Average low temperature in September: 53.2°F

The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (16°F).

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Average pressure in September
Epsie, MT

Average pressure in September - Epsie, MT
  • Average pressure in September: 29.92"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

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Average wind speed in September
Epsie, MT

Average wind speed in September - Epsie, MT
  • Average wind speed in September: 8.4mph

The windiest month (with the highest average wind speed) is April (10mph).
The calmest months (with the lowest average wind speed) are July and August (7.8mph).

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Average humidity in September
Epsie, MT

Average humidity in September - Epsie, MT
  • Average humidity in September: 45%

The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (42%).

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Average rainfall in September
Epsie, MT

Average rainfall in September - Epsie, MT
  • Average rainfall in September: 1.38"

The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is December (0.47").

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Average rainfall days in September
Epsie, MT

Average rainfall days in September - Epsie, MT
  • Average rainfall days in September: 10.3 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (2.8 days).

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Average snowfall in September
Epsie, MT

Average snowfall in September - Epsie, MT
  • Average snowfall in September: 0.16"

The month with the highest snowfall is February (4.33").
The months with the least snowfall are July and August (0").

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Average snowfall days in September
Epsie, MT

Average snowfall days in September - Epsie, MT
  • Average snowfall days in September: 0.2 days

The month with the highest number of snowfall days is February (10.4 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
Epsie, MT

Average daylight in September / Average sunshine in September - Epsie, MT
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in September: 10h and 2min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

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Average sunshine days in September
Epsie, MT

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

The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.3 days).

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Average UV index in September
Epsie, MT

Average UV index in September - Epsie, MT
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, April, November and December (UV index 2).

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Average cloud cover in September
Epsie, MT

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

The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 15).

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Average visibility in September
Epsie, MT

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

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

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Epsie, Montana, USA

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