September weather forecastTyonek, AK
September
Weather in September
The first month of the autumn, September, is also a fresh month in Tyonek, Alaska, with an average temperature fluctuating between 50°F (10°C) and 38.7°F (3.7°C).Temperature
The transition into September involves a decrease in the average high-temperature, falling from a mild 59.5°F (15.3°C) in August to a fresh 50°F (10°C). The nighttime temperature, during September, averages of 38.7°F (3.7°C).Humidity
The average relative humidity in September is 82%.Rainfall
In Tyonek, in September, during 19.8 rainfall days, 4.49" (114mm) of precipitation is typically accumulated. Throughout the year, there are 139.5 rainfall days, and 31.89" (810mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 1.1 snowfall days, it receives 0.43" (11mm) of snow. In Tyonek, during the entire year, snow falls for 99.7 days and aggregates up to 99.45" (2526mm) of snow.Daylight
The average length of the day in September is 12h and 52min.On the first day of the month, sunrise is at 6:59 am and sunset at 9:09 pm. On the last day of September, sunrise is at 8:10 am and sunset at 7:37 pm AKDT.
Sunshine
The average sunshine in September is 5.5h.UV index
The average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily maximum UV index of 2 in September interprets into the following advice:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. It's recommended to limit sun exposure when its radiation is at its peak during midday. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Tyonek, AK
- Average high temperature in September: 50°F
The warmest month (with the highest average high temperature) is July (63.1°F).
The month with the lowest average high temperature is January (16.2°F).
- Average low temperature in September: 38.7°F
The month with the highest average low temperature is July (47.1°F).
The coldest month (with the lowest average low temperature) is January (8.4°F).
Average pressure in September
Tyonek, AK
- Average pressure in September: 29.74"Hg
The month with the highest atmospheric pressure is July (29.95"Hg).
The month with the lowest atmospheric pressure is December (29.68"Hg).
Average wind speed in September
Tyonek, AK
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is January (7.7mph).
The calmest month (with the lowest average wind speed) is July (5.4mph).
Average humidity in September
Tyonek, AK
- Average humidity in September: 82%
The months with the highest relative humidity are March and April (86%).
The months with the lowest relative humidity are May and June (69%).
Average rainfall in September
Tyonek, AK
- Average rainfall in September: 4.49"
The wettest month (with the highest rainfall) is October (4.61").
The driest month (with the least rainfall) is June (1.38").
Average rainfall days in September
Tyonek, AK
- Average rainfall days in September: 19.8 days
The month with the highest number of rainy days is August (20.2 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Tyonek, AK
- Average snowfall in September: 0.43"
The month with the highest snowfall is December (24.17").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Tyonek, AK
- Average snowfall days in September: 1.1 days
The month with the highest number of snowfall days is December (17.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Tyonek, AK
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 19h and 6min).
The month with the shortest days is December (Average daylight: 5h and 42min).
- Average sunshine in September: 5h and 30min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 2h and 48min).
Average sunshine days in September
Tyonek, AK
- Average sunshine days in September: 8.4 days
The month with the most sunshine days is January (15.8 days).
The month with the least sunshine days is September (8.4 days).
Average UV index in September
Tyonek, AK
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are March, October and December (UV index 1).
Average cloud cover in September
Tyonek, AK
- Average cloud cover in September: 58
The month with the most cloud cover is December (Cloud cover 59).
The month with the least cloud cover is June (Cloud cover 48).
Average visibility in September
Tyonek, AK
- Average visibility in September: 5mi
The months with the highest visibility are May, June and July (6mi).
The month with the lowest visibility is April (4mi).
