September weather forecast
Plentywood, MT

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Weather in September

The first month of the autumn, September, is still a pleasant month in Plentywood, Montana, with an average temperature varying between 52.3°F (11.3°C) and 70°F (21.1°C).

Temperature

In the transition to September, Plentywood observes a drop in the average high-temperature, moving from a warm 81.3°F (27.4°C) in August to an agreeable 70°F (21.1°C). Throughout September, Plentywood's nights cool down to an average of 52.3°F (11.3°C).

Humidity

In September, the average relative humidity is 50%.

Rainfall

In Plentywood, Montana, in September, during 8.6 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. In Plentywood, during the entire year, the rain falls for 93.3 days and collects up to 12.01" (305mm) of precipitation.

Snowfall

In Plentywood, snow does not fall in June through September.

Daylight

In Plentywood, Montana, the average length of the day in September is 12h and 34min.
On the first day of September in Plentywood, sunrise is at 6:16 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:38 pm MDT.

Sunshine

The average sunshine in September in Plentywood is 9.9h.

UV index

In Plentywood, Montana, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 4 during September translates into the following recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
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Frequently asked questions

What is the average September temperature in Plentywood?

The high-temperature in Plentywood, Montana, during September is 70°F (21.1°C) and the low-temperature is 52.3°F (11.3°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in August is calculated to be 82.4°F (28°C).

What is the average humidity in September in Plentywood?

The average relative humidity in September in Plentywood, Montana, is 50%.

How many days does it rain in September in Plentywood?

In Plentywood, Montana, in September, during 8.6 rainfall days, 1.5" (38mm) of precipitation is typically accumulated.

When it does not snow in Plentywood?

In Plentywood, snow does not fall in June through September.

Does it snow in Plentywood in September?

In Plentywood, Montana, in September, it doesn't snow. In October, it regularly snows.

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

The average day length in September in Plentywood, Montana, is 12h and 34min.

When is the sunrise / sunset in September in Plentywood?

On the first day of September in Plentywood, sunrise is at 6:16 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:38 pm MDT.

How long on average sun shines in September in Plentywood?

In Plentywood, Montana, the average sunshine duration in September is 9.9h.

What is the UV index reading in September in Plentywood?

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

Average temperature in September - Plentywood, MT
  • Average high temperature in September: 70°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is February (19.8°F).

  • Average low temperature in September: 52.3°F

The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is February (6.3°F).

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Average pressure in September
Plentywood, MT

Average pressure in September - Plentywood, MT
  • Average pressure in September: 29.93"Hg

The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

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Average wind speed in September
Plentywood, MT

Average wind speed in September - Plentywood, MT
  • Average wind speed in September: 10.2mph

The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is February (9.2mph).

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Average humidity in September
Plentywood, MT

Average humidity in September - Plentywood, MT
  • Average humidity in September: 50%

The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is August (46%).

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Average rainfall in September
Plentywood, MT

Average rainfall in September - Plentywood, MT
  • Average rainfall in September: 1.5"

The wettest month (with the highest rainfall) is June (2.17").
The driest month (with the least rainfall) is February (0.47").

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Average rainfall days in September
Plentywood, MT

Average rainfall days in September - Plentywood, MT
  • Average rainfall days in September: 8.6 days

The month with the highest number of rainy days is June (13.9 days).
The month with the least rainy days is February (2.6 days).

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Average snowfall in September
Plentywood, MT

Average snowfall in September - Plentywood, MT
  • Average snowfall in September: 0"

The month with the highest snowfall is November (3.74").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Plentywood, MT

Average snowfall days in September - Plentywood, MT
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Plentywood, MT

Average daylight in September / Average sunshine in September - Plentywood, MT
  • Average daylight in September: 12h and 4min

The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).

  • Average sunshine in September: 9h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).

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Average sunshine days in September
Plentywood, MT

Average sunshine days in September - Plentywood, MT
  • Average sunshine days in September: 19.6 days

The month with the most sunshine days is August (20.1 days).
The months with the least sunshine days are February and June (13.8 days).

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Average UV index in September
Plentywood, MT

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

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).

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Average cloud cover in September
Plentywood, MT

Average cloud cover in September - Plentywood, MT
  • Average cloud cover in September: 26

The month with the most cloud cover is February (Cloud cover 60).
The months with the least cloud cover are July and August (Cloud cover 19).

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Average visibility in September
Plentywood, MT

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

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

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Plentywood, Montana, USA

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