September weather forecastGlentana, MT
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Glentana, Montana, with an average temperature varying between 70.2°F (21.2°C) and 53.8°F (12.1°C).Temperature
September brings a minor decrease, with the average high-temperature reducing from a warm 81.7°F (27.6°C) in August to an agreeable 70.2°F (21.2°C). An average low-temperature of 53.8°F (12.1°C) is observed during September nights in Glentana.Humidity
In September, the average relative humidity in Glentana is 47%.Rainfall
In Glentana, Montana, during September, the rain falls for 9.1 days and regularly aggregates up to 1.1" (28mm) of precipitation. In Glentana, during the entire year, the rain falls for 90.8 days and collects up to 11.1" (282mm) of precipitation.Snowfall
June through September are months without snowfall in Glentana.Daylight
The average length of the day in September in Glentana is 12h and 34min.On the first day of the month, sunrise is at 6:23 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:04 am and sunset at 6:45 pm MDT.
Sunshine
In September, the average sunshine is 10.1h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: In September, the UV index of 4 transforms into the following advice:
Exercise prevention - Protecting skin and eyes from harm is required. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Glentana, MT
- Average high temperature in September: 70.2°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is February (23.7°F).
- Average low temperature in September: 53.8°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is February (10.2°F).
Average pressure in September
Glentana, MT
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is February (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
Glentana, MT
- Average wind speed in September: 10.4mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is February (8.8mph).
Average humidity in September
Glentana, MT
- Average humidity in September: 47%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (42%).
Average rainfall in September
Glentana, MT
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is June (2.01").
The driest months (with the least rainfall) are January and February (0.35").
Average rainfall days in September
Glentana, MT
- Average rainfall days in September: 9.1 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in September
Glentana, MT
- Average snowfall in September: 0"
The month with the highest snowfall is December (2.6").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Glentana, MT
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (9.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Glentana, MT
- Average daylight in September: 12h and 36min
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 6min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Glentana, MT
- Average sunshine days in September: 18.9 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (13.8 days).
Average UV index in September
Glentana, 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
Glentana, MT
- Average cloud cover in September: 23
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 16).
Average visibility in September
Glentana, 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).
