September weather forecastChiniak, AK
September
Weather in September
September, the first month of the autumn in Chiniak, is still a cool month, with an average temperature ranging between min 47.7°F (8.7°C) and max 53.1°F (11.7°C).Temperature
The unfolding of September shows an average high-temperature of a cool 53.1°F (11.7°C), indicating a slight variance from August's 57.6°F (14.2°C). Nighttime temperature in Chiniak sees a small decrement from daytime highs, dipping to an average of 47.7°F (8.7°C) during September.Humidity
In Chiniak, the average relative humidity in September is 83%.Rainfall
In Chiniak, in September, it is raining for 17.6 days, with typically 3.27" (83mm) of accumulated precipitation. In Chiniak, during the entire year, the rain falls for 171.2 days and collects up to 37.32" (948mm) 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 0.1 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, there are 35.1 snowfall days, and 13.74" (349mm) of snow is accumulated.Daylight
In Chiniak, the average length of the day in September is 12h and 45min.On the first day of the month, sunrise is at 7:12 am and sunset at 9:05 pm. On the last day of September, in Chiniak, sunrise is at 8:13 am and sunset at 7:44 pm AKDT.
Sunshine
The average sunshine in September is 5.8h.UV index
The months with the highest UV index are June through September, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: During September, 3 as the daily maximum UV index converts into the following advice:
Take precautions - Protection against sunburn is recommended. To protect against the Sun's most potent rays, avoid direct exposure around midday. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Chiniak, AK
- Average high temperature in September: 53.1°F
The warmest month (with the highest average high temperature) is August (57.6°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in September: 47.7°F
The month with the highest average low temperature is August (50.7°F).
The coldest month (with the lowest average low temperature) is March (30.6°F).
Average pressure in September
Chiniak, AK
- Average pressure in September: 29.71"Hg
The month with the highest atmospheric pressure is July (29.98"Hg).
The month with the lowest atmospheric pressure is December (29.55"Hg).
Average wind speed in September
Chiniak, AK
- Average wind speed in September: 10.3mph
The windiest month (with the highest average wind speed) is December (14.2mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in September
Chiniak, AK
- Average humidity in September: 83%
The month with the highest relative humidity is July (86%).
The months with the lowest relative humidity are March and November (80%).
Average rainfall in September
Chiniak, AK
- Average rainfall in September: 3.27"
The wettest months (with the highest rainfall) are October and November (4.53").
The driest month (with the least rainfall) is July (1.85").
Average rainfall days in September
Chiniak, AK
- Average rainfall days in September: 17.6 days
The month with the highest number of rainy days is September (17.6 days).
The month with the least rainy days is March (10.8 days).
Average snowfall in September
Chiniak, AK
- Average snowfall in September: 0.08"
The month with the highest snowfall is March (3.15").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Chiniak, AK
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is March (8.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Chiniak, AK
- Average daylight in September: 12h and 48min
The month with the longest days is June (Average daylight: 17h and 54min).
The month with the shortest days is December (Average daylight: 6h and 42min).
- Average sunshine in September: 5h and 48min
The month with the most sunshine is July (Average sunshine: 8h and 18min).
The months with the least sunshine are January and December (Average sunshine: 2h and 36min).
Average sunshine days in September
Chiniak, AK
- Average sunshine days in September: 11.5 days
The month with the most sunshine days is July (14.7 days).
The month with the least sunshine days is April (10.7 days).
Average UV index in September
Chiniak, AK
- Average UV index in September: 3
The months with the highest UV index are June, July, August and September (UV index 3).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Chiniak, AK
- Average cloud cover in September: 52
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 52).
Average visibility in September
Chiniak, AK
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
