September weather forecast
Lodge Grass, MT

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Lodge Grass, Montana, with temperature in the range of an average high of 74.3°F (23.5°C) and an average low of 54°F (12.2°C).

Temperature

With the onset of September, Lodge Grass's average high-temperature adjusts, receding from August's warm 84°F (28.9°C) to a still moderately hot 74.3°F (23.5°C). Throughout the nights in September, an average low-temperature of 54°F (12.2°C) is noted.

Humidity

The average relative humidity in September is 42%.

Rainfall

In Lodge Grass, in September, it is raining for 2.6 days, with typically 0.24" (6mm) of accumulated precipitation. In Lodge Grass, during the entire year, the rain falls for 46.3 days and collects up to 2.83" (72mm) of precipitation.

Snowfall

In Lodge Grass, snow does not fall in June through September.

Daylight

In September, the average length of the day is 12h and 31min.
On the first day of the month, sunrise is at 6:32 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:07 am and sunset at 6:50 pm MDT.

Sunshine

In September, the average sunshine is 10.7h.

UV index

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 rays for ordinary individuals.
Note: In September, the UV index of 4 transforms into the following advice:
Ensure safety - Sun damage prevention is strongly urged. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Updated: Jul 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

In Lodge Grass, 74.3°F (23.5°C) is the average high-temperature and 54°F (12.2°C) is the average low-temperature during September. The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in July is computed to be 86°F (30°C).

What is the average humidity in September?

In Lodge Grass, the average relative humidity in September is 42%.

How much does it rain in September?

In Lodge Grass, Montana, in September, it is raining for 2.6 days, with typically 0.24" (6mm) of accumulated precipitation.

When it does not snow?

June through September are months without snowfall.

Does it snow in Lodge Grass in September?

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

What is the average length of the day in September?

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

When are sunrise and sunset in September?

On the first day of September, sunrise is at 6:32 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:50 pm MDT.

How many hours of sunshine does Lodge Grass have in September?

In Lodge Grass, the average sunshine duration in September is 10.7h.

What is the UV index reading in September?

The average daily maximum UV index in September in Lodge Grass is 4. A UV Index reading of 3 to 5 represents a medium health risk 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
Lodge Grass, MT

Average temperature in September - Lodge Grass, MT
  • Average high temperature in September: 74.3°F

The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is December (31.3°F).

  • Average low temperature in September: 54°F

The months with the highest average low temperature are July and August (61.3°F).
The coldest month (with the lowest average low temperature) is February (17.8°F).

Average pressure in September
Lodge Grass, MT

Average pressure in September - Lodge Grass, MT
  • Average pressure in September: 29.94"Hg

The months with the highest atmospheric pressure are January and December (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

Average wind speed in September
Lodge Grass, MT

Average wind speed in September - Lodge Grass, MT
  • Average wind speed in September: 7.6mph

The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).

Average humidity in September
Lodge Grass, MT

Average humidity in September - Lodge Grass, MT
  • Average humidity in September: 42%

The months with the highest relative humidity are January and February (76%).
The month with the lowest relative humidity is August (38%).

Average rainfall in September
Lodge Grass, MT

Average rainfall in September - Lodge Grass, MT
  • Average rainfall in September: 0.24"

The wettest month (with the highest rainfall) is May (0.47").
The driest months (with the least rainfall) are January and December (0.12").

Average rainfall days in September
Lodge Grass, MT

Average rainfall days in September - Lodge Grass, MT
  • Average rainfall days in September: 2.6 days

The month with the highest number of rainy days is May (6.1 days).
The month with the least rainy days is December (2.2 days).

Average snowfall in September
Lodge Grass, MT

Average snowfall in September - Lodge Grass, MT
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.57").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Lodge Grass, MT

Average snowfall days in September - Lodge Grass, MT
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is February (5.6 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in September /
Average sunshine in September
Lodge Grass, MT

Average daylight in September / Average sunshine in September - Lodge Grass, 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 4min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).

Average sunshine days in September
Lodge Grass, MT

Average sunshine days in September - Lodge Grass, MT
  • Average sunshine days in September: 26.8 days

The month with the most sunshine days is September (26.8 days).
The month with the least sunshine days is February (21.6 days).

Average UV index in September
Lodge Grass, MT

Average UV index in September - Lodge Grass, 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, November and December (UV index 2).

Average cloud cover in September
Lodge Grass, MT

Average cloud cover in September - Lodge Grass, MT
  • Average cloud cover in September: 18

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).

Average visibility in September
Lodge Grass, MT

Average visibility in September - Lodge Grass, 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).

Lodge Grass, Montana, USA

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