September weather forecastNenana, AK
September
Weather in September
September marks the beginning of autumn in Nenana, Alaska. The summer’s heat reduces substantially, resulting in comfortable temperatures and the splendid colors of fall dominate the landscape. Compared to August, the rainfall is lower but the month does herald cooler days. It's a beautiful time to explore the city with a backdrop of red, orange, and yellow foliage. By the end of the month, the first chills of winter can be felt in the air.Temperature
September's onset corresponds with a shift in the average high-temperature, moving from an enjoyable 65.7°F (18.7°C) in August to a fresh 53.8°F (12.1°C). September nights cool down to an average low-temperature of 37.4°F (3°C).Humidity
The average relative humidity in September is 75%.Rainfall
In September, the rain falls for 10.5 days. Throughout September, 1.14" (29mm) of precipitation is accumulated. In Nenana, during the entire year, the rain falls for 82.9 days and collects up to 10.75" (273mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 1.4 snowfall days, it receives 0.51" (13mm) of snow. In Nenana, during the entire year, snow falls for 80.5 days and aggregates up to 24.09" (612mm) of snow.Daylight
In September, the average length of the day is 12h and 59min.On the first day of the month, sunrise is at 6:40 am and sunset at 9:11 pm. On the last day of September, sunrise is at 8:05 am and sunset at 7:26 pm AKDT.
Sunshine
In September, the average sunshine is 6.9h.UV index
In September, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In September, the maximum UV index of 2 suggests this advice:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Nenana, AK
- Average high temperature in September: 53.8°F
The warmest month (with the highest average high temperature) is July (73°F).
The month with the lowest average high temperature is January (1.4°F).
- Average low temperature in September: 37.4°F
The month with the highest average low temperature is July (52°F).
The coldest month (with the lowest average low temperature) is January (-10.8°F).
Average pressure in September
Nenana, AK
- Average pressure in September: 29.77"Hg
The month with the highest atmospheric pressure is February (29.96"Hg).
The month with the lowest atmospheric pressure is September (29.77"Hg).
Average wind speed in September
Nenana, AK
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is July (5.2mph).
The calmest months (with the lowest average wind speed) are January, August, September and October (4.7mph).
Average humidity in September
Nenana, AK
- Average humidity in September: 75%
The months with the highest relative humidity are January, February, March and December (95%).
The month with the lowest relative humidity is June (54%).
Average rainfall in September
Nenana, AK
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is August (2.56").
The driest month (with the least rainfall) is January (0.31").
Average rainfall days in September
Nenana, AK
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is August (14.9 days).
The month with the least rainy days is February (0.8 days).
Average snowfall in September
Nenana, AK
- Average snowfall in September: 0.51"
The month with the highest snowfall is November (6.5").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Nenana, AK
- Average snowfall days in September: 1.4 days
The month with the highest number of snowfall days is March (14.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Nenana, AK
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 12min).
The month with the shortest days is December (Average daylight: 4h and 6min).
- Average sunshine in September: 6h and 54min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 1h and 48min).
Average sunshine days in September
Nenana, AK
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is January (21.4 days).
The month with the least sunshine days is April (12.5 days).
Average UV index in September
Nenana, AK
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).
Average cloud cover in September
Nenana, AK
- Average cloud cover in September: 50
The month with the most cloud cover is March (Cloud cover 67).
The months with the least cloud cover are May and June (Cloud cover 42).
Average visibility in September
Nenana, AK
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are February and March (2mi).
