September weather forecastThorne Bay, AK
September
Weather in September
September in Thorne Bay, Alaska features a further temperature drop, with it ranging from a cool 46.9°F (8.3°C) to a high of 56.5°F (13.6°C). Coinciding with the onset of the fall season, the rainfall increases to 6.02" (153mm), making it the city's wettest month. The prominence of the autumnal equinox implies shorter daylight hours and leaves changing color from lush green to vibrant yellows and oranges. It's an excellent month for fall photography with a myriad of landscapes and wildlife shots available.Temperature
September's climate shows a minor adjustment in average high-temperatures to a still moderate 56.5°F (13.6°C) from August's 60.4°F (15.8°C). In September, Thorne Bay experiences a temperature dip to an average of 46.9°F (8.3°C) at night.Humidity
In Thorne Bay, the average relative humidity in September is 88%.Rainfall
In Thorne Bay, in September, it is raining for 19.4 days, with typically 6.02" (153mm) of accumulated precipitation. Throughout the year, there are 231.7 rainfall days, and 67.83" (1723mm) of precipitation is accumulated.Snowfall
In Thorne Bay, snow does not fall in May through October.Daylight
In Thorne Bay, the average length of the day in September is 12h and 43min.On the first day of the month, sunrise is at 5:56 am and sunset at 7:42 pm. On the last day of September, sunrise is at 6:52 am and sunset at 6:26 pm AKDT.
Sunshine
The months with the most sunshine are May and September, with an average of 5.7h of sunshine.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 3 during September translates into the following directions:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. To protect against the Sun's most potent rays, avoid direct exposure around midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Thorne Bay, AK
- Average high temperature in September: 56.5°F
The warmest months (with the highest average high temperature) are July and August (60.4°F).
The month with the lowest average high temperature is December (36.5°F).
- Average low temperature in September: 46.9°F
The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is February (30.2°F).
Average pressure in September
Thorne Bay, AK
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is July (30.06"Hg).
The month with the lowest atmospheric pressure is November (29.77"Hg).
Average wind speed in September
Thorne Bay, AK
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is July (4.8mph).
Average humidity in September
Thorne Bay, AK
- Average humidity in September: 88%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are March and May (84%).
Average rainfall in September
Thorne Bay, AK
- Average rainfall in September: 6.02"
The wettest month (with the highest rainfall) is November (8.03").
The driest month (with the least rainfall) is May (2.83").
Average rainfall days in September
Thorne Bay, AK
- Average rainfall days in September: 19.4 days
The month with the highest number of rainy days is November (22.5 days).
The month with the least rainy days is February (14.8 days).
Average snowfall in September
Thorne Bay, AK
- Average snowfall in September: 0"
The month with the highest snowfall is March (10.35").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Thorne Bay, AK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (10.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Thorne Bay, AK
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 17h and 24min).
The month with the shortest days is December (Average daylight: 7h and 6min).
- Average sunshine in September: 5h and 42min
The months with the most sunshine are May and September (Average sunshine: 5h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in September
Thorne Bay, AK
- Average sunshine days in September: 9.8 days
The month with the most sunshine days is July (11.1 days).
The month with the least sunshine days is November (5.3 days).
Average UV index in September
Thorne Bay, AK
- Average UV index in September: 3
The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Thorne Bay, AK
- Average cloud cover in September: 62
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is September (Cloud cover 62).
Average visibility in September
Thorne Bay, AK
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (5mi).
The months with the lowest visibility are July and August (4mi).
