Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September brings a decrease in the average high-temperature, falling from August's mild 57.9°F (14.4°C) to a frosty 47.3°F (8.5°C). During September, the nighttime temperature averages to a wintry 37°F (2.8°C).Humidity
In September, the average relative humidity is 75%.Rainfall
In Selawik, Alaska, in September, during 11.5 rainfall days, 1.18" (30mm) of precipitation is typically accumulated. Throughout the year, there are 85.8 rainfall days, and 12.91" (328mm) of precipitation is accumulated.Snowfall
Months with snowfall in Selawik are January through May, September through December. September is the first month it typically snows in Selawik. Throughout September, in the average 2.6 snowfall days, it receives 0.67" (17mm) of snow. Throughout the year, there are 90.6 snowfall days, and 33.58" (853mm) of snow is accumulated.Daylight
In September, the average length of the day is 13h and 5min.On the first day of the month, sunrise is at 7:16 am and sunset at 10:02 pm. On the last day of September, sunrise is at 8:51 am and sunset at 8:07 pm AKDT.
Sunshine
The average sunshine in September in Selawik is 6.1h.UV index
In Selawik, Alaska, the average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 2 during September translates into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the average September temperature in Selawik?
What is the average humidity in September in Selawik?
How many days does it rain in September in Selawik?
When does it start snowing in Selawik?
How many hours of daylight does Selawik have in September?
When is the sunrise / sunset in September in Selawik?
How many hours of sunshine does Selawik have in September?
What is the UV index intensity in September in Selawik?
Average temperature in September
Selawik, AK
- Average high temperature in September: 47.3°F
The warmest month (with the highest average high temperature) is July (62.2°F).
The month with the lowest average high temperature is January (0.7°F).
- Average low temperature in September: 37°F
The month with the highest average low temperature is July (50°F).
The coldest month (with the lowest average low temperature) is January (-8.1°F).
Average pressure in September
Selawik, AK
- Average pressure in September: 29.78"Hg
The month with the highest atmospheric pressure is March (29.96"Hg).
The month with the lowest atmospheric pressure is September (29.78"Hg).
Average wind speed in September
Selawik, AK
- Average wind speed in September: 8.1mph
The windiest month (with the highest average wind speed) is October (8.8mph).
The calmest month (with the lowest average wind speed) is May (7.1mph).
Average humidity in September
Selawik, AK
- Average humidity in September: 75%
The months with the highest relative humidity are February and March (91%).
The month with the lowest relative humidity is June (63%).
Average rainfall in September
Selawik, AK
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is August (1.93").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in September
Selawik, AK
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is August (16.2 days).
The month with the least rainy days is November (1.4 days).
Average snowfall in September
Selawik, AK
- Average snowfall in September: 0.67"
The month with the highest snowfall is February (5.91").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Selawik, AK
- Average snowfall days in September: 2.6 days
The month with the highest number of snowfall days is December (14.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Selawik, AK
- Average daylight in September: 13h and 1min
The month with the longest days is May (Average daylight: 19h and 48min).
The month with the shortest days is December (Average daylight: 2h and 36min).
- Average sunshine in September: 6h and 1min
The month with the most sunshine is August (Average sunshine: 8h and 0min).
The month with the least sunshine is June (Average sunshine: 0h and 30min).
Average sunshine days in September
Selawik, AK
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is August (12.7 days).
Average UV index in September
Selawik, AK
- Average UV index in September: 2
The month with the highest UV index is June (UV index 4).
The months with the lowest UV index are January, February, March, April, November and December (UV index 1).
Average cloud cover in September
Selawik, AK
- Average cloud cover in September: 51
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is June (Cloud cover 42).
Average visibility in September
Selawik, 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, February, March, April and December (4mi).
Selawik, Alaska, USA
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