September weather forecastLower Tonsina, AK
September
Weather in September
The first month of the autumn, September, is still a cool month in Lower Tonsina, Alaska, 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
As September arrives, Lower Tonsina's weather displays a decrease in high-temperatures, transitioning from August's enjoyable 61.9°F (16.6°C) to a cool 51.6°F (10.9°C). Lower Tonsina registers a consistent average low-temperature of 36.5°F (2.5°C) during September.Humidity
In September, the average relative humidity is 72%.Rainfall
In September, the rain falls for 10.1 days. Throughout September, 0.79" (20mm) of precipitation is accumulated. Throughout the year, there are 81.1 rainfall days, and 5.71" (145mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.5 snowfall days, it receives 0.2" (5mm) of snow. In Lower Tonsina, during the entire year, snow falls for 54.8 days and aggregates up to 17.13" (435mm) of snow.Daylight
In September, the average length of the day is 12h and 53min.On the first day of September, sunrise is at 6:31 am and sunset at 8:45 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 7:11 pm AKDT.
Sunshine
The average sunshine in September is 9h.UV index
January through April, September through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum UV index of 2 in September translates into the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lower 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
Lower 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
Lower 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
Lower 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
Lower 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
Lower 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
Lower 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
Lower 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
Lower 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
Lower 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
Lower 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
Lower 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
Lower 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).
