September weather forecast
Peerless, MT

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Weather in September

The first month of the autumn, September, is also an agreeable month in Peerless, Montana, with temperature in the range of an average low of 54.3°F (12.4°C) and an average high of 71.6°F (22°C).

Temperature

As August shifts into September, a slight alteration in temperatures is observed, with average highs reducing from a moderately hot 82.9°F (28.3°C) to an agreeable 71.6°F (22°C). In Peerless, the average nighttime temperature during September is a cool 54.3°F (12.4°C).

Humidity

The average relative humidity in September in Peerless is 46%.

Rainfall

In Peerless, during September, the rain falls for 8 days and regularly aggregates up to 1.5" (38mm) of precipitation. In Peerless, during the entire year, the rain falls for 95.7 days and collects up to 11.69" (297mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in September is 12h and 34min.
On the first day of the month, sunrise is at 6:21 am and sunset at 7:44 pm. On the last day of September, in Peerless, Montana, sunrise is at 7:02 am and sunset at 6:43 pm MDT.

Sunshine

The average sunshine in September is 10.1h.

UV index

In Peerless, Montana, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the maximum UV index of 4 translates into these guidelines:
Make use of precautions - Suggestions to resist sunburn are communicated. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September in Peerless?

September temperatures in Peerless, Montana, vary between a high-temperature of 71.6°F (22°C) and a low-temperature of 54.3°F (12.4°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in August is appraised at 82.4°F (28°C).

What is the average humidity in September in Peerless?

In September, the average relative humidity in Peerless, Montana, is 46%.

How much does it rain in Peerless in September?

In Peerless, Montana, during September, the rain falls for 8 days and regularly aggregates up to 1.5" (38mm) of precipitation.

When it does not snow in Peerless?

June through September are months without snowfall in Peerless.

Does it snow in Peerless in September?

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

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

In Peerless, Montana, the average day length in September is 12h and 34min.

What time are sunrise and sunset in September in Peerless?

In September, on the first day of the month, sunrise is at 6:21 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:43 pm MDT.

How many hours of sunshine does Peerless have in September?

The average sunshine duration in September is 10.1h.

What is the UV index intensity in September in Peerless?

The average daily maximum UV index in September in Peerless, Montana, is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from unsafe exposure to Sun's UV rays.
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
Peerless, MT

Average temperature in September - Peerless, MT
  • Average high temperature in September: 71.6°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is February (23°F).

  • Average low temperature in September: 54.3°F

The month with the highest average low temperature is July (63.7°F).
The coldest months (with the lowest average low temperature) are January and February (10.2°F).

Average pressure in September
Peerless, MT

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

The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

Average wind speed in September
Peerless, MT

Average wind speed in September - Peerless, MT
  • Average wind speed in September: 10.3mph

The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is February (8.8mph).

Average humidity in September
Peerless, MT

Average humidity in September - Peerless, MT
  • Average humidity in September: 46%

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (42%).

Average rainfall in September
Peerless, MT

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

The wettest month (with the highest rainfall) is May (1.89").
The driest month (with the least rainfall) is January (0.51").

Average rainfall days in September
Peerless, MT

Average rainfall days in September - Peerless, MT
  • Average rainfall days in September: 8 days

The month with the highest number of rainy days is May (13.1 days).
The month with the least rainy days is February (3.8 days).

Average snowfall in September
Peerless, MT

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

The month with the highest snowfall is February (3.82").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Peerless, MT

Average snowfall days in September - Peerless, MT
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is December (13.6 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in September / Average sunshine in September - Peerless, 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: 10h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).

Average sunshine days in September
Peerless, MT

Average sunshine days in September - Peerless, MT
  • Average sunshine days in September: 21.4 days

The month with the most sunshine days is September (21.4 days).
The month with the least sunshine days is April (13.8 days).

Average UV index in September
Peerless, MT

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

The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in September
Peerless, MT

Average cloud cover in September - Peerless, MT
  • Average cloud cover in September: 24

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 16).

Average visibility in September
Peerless, MT

Average visibility in September - Peerless, 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).

Peerless, Montana, USA

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