Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The arrival of September corresponds with a reduction in the average high-temperature, down from August's warm 76.8°F (24.9°C) to a comfortable 66.7°F (19.3°C). The month of September sees a significant daily temperature drop, recording an average low-temperature of 41.9°F (5.5°C) in Glen.Humidity
In Glen, Montana, the average relative humidity in September is 50%.Rainfall
In September, the rain falls for 8.4 days. Throughout September, 0.67" (17mm) of precipitation is accumulated. Throughout the year, there are 111 rainfall days, and 9.25" (235mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows in Glen. Throughout September, in the average 0.8 snowfall days, it receives 1.18" (30mm) of snow. Throughout the year, in Glen, there are 73.8 snowfall days, and 27.52" (699mm) of snow is accumulated.Daylight
The average length of the day in September in Glen is 12h and 31min.On the first day of September, sunrise is at 6:53 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 7:12 pm MDT.
Sunshine
The average sunshine in September in Glen is 9.9h.UV index
In September, the average daily maximum UV index in Glen is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: In September, the maximum UV index of 3 transforms into these recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. 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
What is the temperature in September in Glen?
What is the average humidity in September in Glen?
How much does it rain in Glen in September?
When does it start snowing in Glen?
What is the average length of the day in September in Glen?
When is the sunrise / sunset in September in Glen?
How many hours of sunshine does Glen have in September?
What is the UV index reading in September in Glen?
Average temperature in September
Glen, MT
- Average high temperature in September: 66.7°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is December (25.7°F).
- Average low temperature in September: 41.9°F
The month with the highest average low temperature is July (47.8°F).
The coldest month (with the lowest average low temperature) is December (10.6°F).
Average pressure in September
Glen, MT
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Glen, MT
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is November (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Glen, MT
- Average humidity in September: 50%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are July and August (45%).
Average rainfall in September
Glen, MT
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is June (1.34").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in September
Glen, MT
- Average rainfall days in September: 8.4 days
The month with the highest number of rainy days is May (13.9 days).
The months with the least rainy days are November and December (6.2 days).
Average snowfall in September
Glen, MT
- Average snowfall in September: 1.18"
The month with the highest snowfall is February (4.72").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Glen, MT
- Average snowfall days in September: 0.8 days
The month with the highest number of snowfall days is February (13.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Glen, 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: 9h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 12min).
Average sunshine days in September
Glen, MT
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is July (18.7 days).
The month with the least sunshine days is April (10.7 days).
Average UV index in September
Glen, MT
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Glen, MT
- Average cloud cover in September: 18
The month with the most cloud cover is February (Cloud cover 41).
The months with the least cloud cover are July and August (Cloud cover 13).
Average visibility in September
Glen, MT
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Glen, Montana, USA
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