September weather forecastTonsina, AK
September
Weather in September
September, the first month of the autumn in Tonsina, is still a cool month, with temperature in the range of an average high of 51.6°F (10.9°C) and an average low of 36.5°F (2.5°C).Temperature
In Tonsina, entering September brings a temperature decrement, reducing from August's enjoyable 61.9°F (16.6°C) to a fresh 51.6°F (10.9°C). During September, the nighttime temperature averages to a wintry 36.5°F (2.5°C).Humidity
The average relative humidity in September is 72%.Rainfall
In Tonsina, in September, during 10.1 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. In Tonsina, during the entire year, the rain falls for 81.1 days and collects up to 5.71" (145mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.5 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, there are 54.8 snowfall days, and 17.13" (435mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 53min.On the first day of the month, sunrise is at 6:33 am and sunset at 8:47 pm. On the last day of September, sunrise is at 7:47 am and sunset at 7:13 pm AKDT.
Sunshine
The average sunshine in September is 9h.UV index
The months with the lowest UV index are January through April, September through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index, 2 during September, leads to the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Tonsina, AK
- Average high temperature in September: 51.6°F
The warmest month (with the highest average high temperature) is July (67.5°F).
The month with the lowest average high temperature is January (9.1°F).
- Average low temperature in September: 36.5°F
The month with the highest average low temperature is July (47.5°F).
The coldest month (with the lowest average low temperature) is January (-1.8°F).
Average pressure in September
Tonsina, AK
- Average pressure in September: 29.78"Hg
The month with the highest atmospheric pressure is July (29.95"Hg).
The months with the lowest atmospheric pressure are September, October, November and December (29.78"Hg).
Average wind speed in September
Tonsina, AK
- Average wind speed in September: 5.6mph
The windiest month (with the highest average wind speed) is June (6.2mph).
The calmest months (with the lowest average wind speed) are January and December (4.5mph).
Average humidity in September
Tonsina, AK
- Average humidity in September: 72%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is June (57%).
Average rainfall in September
Tonsina, AK
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is August (0.91").
The driest month (with the least rainfall) is April (0.2").
Average rainfall days in September
Tonsina, AK
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is August (11.3 days).
The months with the least rainy days are February and November (3.7 days).
Average snowfall in September
Tonsina, AK
- Average snowfall in September: 0.2"
The month with the highest snowfall is December (4.57").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Tonsina, AK
- Average snowfall days in September: 0.5 days
The month with the highest number of snowfall days is December (11.2 days).
The months with the least snowfall days are June and July (0 days).
Average daylight in September /
Average sunshine in September
Tonsina, AK
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 19h and 24min).
The month with the shortest days is December (Average daylight: 5h and 30min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is June (Average sunshine: 14h and 12min).
The months with the least sunshine are January and December (Average sunshine: 3h and 54min).
Average sunshine days in September
Tonsina, AK
- Average sunshine days in September: 17.6 days
The month with the most sunshine days is March (24.2 days).
The month with the least sunshine days is August (17.3 days).
Average UV index in September
Tonsina, AK
- Average UV index in September: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, September, October, November and December (UV index 2).
Average cloud cover in September
Tonsina, AK
- Average cloud cover in September: 39
The month with the most cloud cover is December (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
Tonsina, AK
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and March (4mi).
