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
A shift in the average high-temperature occurs in September, reducing from a moderately hot 75.7°F (24.3°C) in August to a refreshing 66°F (18.9°C). Polaris registers a significant drop in temperature in September, with average nighttime lows of 41.7°F (5.4°C).Humidity
In September, the average relative humidity is 50%.Rainfall
In Polaris, Montana, in September, it is raining for 9.7 days, with typically 0.87" (22mm) of accumulated precipitation. Throughout the year, in Polaris, there are 126.7 rainfall days, and 10.35" (263mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows in Polaris. Throughout September, in the average 1 snowfall days, it receives 1.34" (34mm) of snow. Throughout the year, there are 81.2 snowfall days, and 29.76" (756mm) of snow is accumulated.Daylight
In Polaris, Montana, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:55 am and sunset at 8:09 pm. On the last day of September, in Polaris, sunrise is at 7:30 am and sunset at 7:13 pm MDT.
Sunshine
The average sunshine in September is 9.8h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The UV index of 3 in September translates into these instructions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Frequently asked questions
What is the average September temperature in Polaris?
What is the average humidity in September in Polaris?
How much does it rain in Polaris in September?
When does it start snowing in Polaris?
What is the average length of the day in September in Polaris?
When are sunrise and sunset in September in Polaris?
How many hours of sunshine does Polaris have in September?
How high is the UV index in September in Polaris?
Average temperature in September
Polaris, MT
- Average high temperature in September: 66°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is December (25.2°F).
- Average low temperature in September: 41.7°F
The month with the highest average low temperature is July (47.5°F).
The coldest month (with the lowest average low temperature) is December (10.6°F).
Average pressure in September
Polaris, 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
Polaris, 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
Polaris, MT
- Average humidity in September: 50%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are July and August (45%).
Average rainfall in September
Polaris, MT
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in September
Polaris, MT
- Average rainfall days in September: 9.7 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (7.7 days).
Average snowfall in September
Polaris, MT
- Average snowfall in September: 1.34"
The month with the highest snowfall is February (5.51").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Polaris, MT
- Average snowfall days in September: 1 days
The month with the highest number of snowfall days is February (14.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Polaris, 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 6min).
Average sunshine days in September
Polaris, MT
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is July (18.2 days).
The month with the least sunshine days is April (10.1 days).
Average UV index in September
Polaris, 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
Polaris, 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 13).
Average visibility in September
Polaris, 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).
Polaris, Montana, USA
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