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
With the onset of September, Seeley Lake's average high-temperature adjusts, receding from August's warm 76.5°F (24.7°C) to a refreshing 65.5°F (18.6°C). Seeley Lake experiences a significant downturn from peak daytime temperatures throughout September, with the average low-temperature dipping to a cold 38.3°F (3.5°C).Humidity
The average relative humidity in September in Seeley Lake, Montana, is 61%.Rainfall
In Seeley Lake, during September, the rain falls for 9.2 days and regularly aggregates up to 0.79" (20mm) of precipitation. In Seeley Lake, during the entire year, the rain falls for 135.1 days and collects up to 17.6" (447mm) of precipitation.Snowfall
Months with snowfall in Seeley Lake are January through June, September through December. September is the first month it typically snows in Seeley Lake. Throughout September, in the average 0.4 snowfall days, it receives 0.24" (6mm) of snow. Throughout the year, there are 119.6 snowfall days, and 67.99" (1727mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:54 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 7:14 pm MDT.
Sunshine
The average sunshine in September is 9.5h.UV index
In Seeley Lake, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In September, a regular UV index of 3 translates into these guidelines:
Be vigilant - Preventing sunburn is recommended. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
What are the temperatures in Seeley Lake in September?
What is the average humidity in September in Seeley Lake?
How much does it rain in Seeley Lake in September?
When does it start snowing in Seeley Lake?
How many hours of daylight does Seeley Lake have in September?
When is the sunrise / sunset in September in Seeley Lake?
How many hours of sunshine does Seeley Lake have in September?
What is the UV index intensity in September in Seeley Lake?
Average temperature in September
Seeley Lake, MT
- Average high temperature in September: 65.5°F
The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is December (25.7°F).
- Average low temperature in September: 38.3°F
The month with the highest average low temperature is August (44.2°F).
The coldest month (with the lowest average low temperature) is December (12°F).
Average pressure in September
Seeley Lake, MT
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Seeley Lake, MT
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is April (5.2mph).
The calmest months (with the lowest average wind speed) are August and December (4.3mph).
Average humidity in September
Seeley Lake, MT
- Average humidity in September: 61%
The month with the highest relative humidity is January (92%).
The months with the lowest relative humidity are July and August (53%).
Average rainfall in September
Seeley Lake, MT
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is April (2.05").
The driest month (with the least rainfall) is July (0.59").
Average rainfall days in September
Seeley Lake, MT
- Average rainfall days in September: 9.2 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is August (6 days).
Average snowfall in September
Seeley Lake, MT
- Average snowfall in September: 0.24"
The month with the highest snowfall is January (14.17").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Seeley Lake, MT
- Average snowfall days in September: 0.4 days
The month with the highest number of snowfall days is January (21.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Seeley Lake, MT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in September
Seeley Lake, MT
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is August (21.2 days).
The month with the least sunshine days is February (6 days).
Average UV index in September
Seeley Lake, MT
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Seeley Lake, MT
- Average cloud cover in September: 23
The months with the most cloud cover are January and February (Cloud cover 57).
The month with the least cloud cover is July (Cloud cover 14).
Average visibility in September
Seeley Lake, MT
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).
Seeley Lake, Montana, USA
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