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
With the advent of September, Adak's high-temperatures adjust to a still cool 50.5°F (10.3°C), closely aligning with the preceding month. Registering an almost steady temperature, Adak's nights in September see an average low of 48.2°F (9°C).Humidity
The average relative humidity in September is 88%.Rainfall
In September, the rain falls for 17 days. Throughout September, 2.05" (52mm) of precipitation is accumulated. In Adak, during the entire year, the rain falls for 173.3 days and collects up to 27.4" (696mm) of precipitation.Snowfall
June through September are months without snowfall in Adak.Daylight
In September, the average length of the day in Adak is 12h and 37min.On the first day of the month, sunrise is at 8:00 am and sunset at 9:32 pm. On the last day of September, in Adak, sunrise is at 8:47 am and sunset at 8:24 pm HDT.
Sunshine
In September, the average sunshine is 4.4h.UV index
July through September, with an average maximum UV index of 3, are months with the highest UV index in Adak. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 3 suggests this advice:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Frequently asked questions
What are September temperatures in Adak?
What is the average humidity in September in Adak?
How many days does it rain in September in Adak?
When it does not snow in Adak?
Does it snow in Adak in September?
What is the average length of the day in September in Adak?
When are sunrise and sunset in September in Adak?
How many hours of sunshine does Adak have in September?
What is the month with the highest UV index in Adak?
What is the UV index intensity in September in Adak?
Average temperature in September
Adak, AK
- Average high temperature in September: 50.5°F
The warmest month (with the highest average high temperature) is August (52°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in September: 48.2°F
The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is March (33.8°F).
Average pressure in September
Adak, AK
- Average pressure in September: 29.84"Hg
The month with the highest atmospheric pressure is July (29.95"Hg).
The month with the lowest atmospheric pressure is January (29.48"Hg).
Average wind speed in September
Adak, AK
- Average wind speed in September: 15.7mph
The windiest month (with the highest average wind speed) is February (21.2mph).
The calmest month (with the lowest average wind speed) is July (11.1mph).
Average humidity in September
Adak, AK
- Average humidity in September: 88%
The month with the highest relative humidity is July (94%).
The months with the lowest relative humidity are January and December (76%).
Average rainfall in September
Adak, AK
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is February (2.8").
The driest month (with the least rainfall) is June (1.3").
Average rainfall days in September
Adak, AK
- Average rainfall days in September: 17 days
The month with the highest number of rainy days is October (19.5 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in September
Adak, AK
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Adak, AK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Adak, AK
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 4h and 2min
The month with the most sunshine is October (Average sunshine: 5h and 6min).
The month with the least sunshine is December (Average sunshine: 2h and 6min).
Average sunshine days in September
Adak, AK
- Average sunshine days in September: 10.7 days
The month with the most sunshine days is June (12.8 days).
The month with the least sunshine days is February (6.3 days).
Average UV index in September
Adak, AK
- Average UV index in September: 3
The months with the highest UV index are July, August and September (UV index 3).
The months with the lowest UV index are January, February, March, April and December (UV index 1).
Average cloud cover in September
Adak, AK
- Average cloud cover in September: 67
The month with the most cloud cover is July (Cloud cover 85).
The month with the least cloud cover is October (Cloud cover 63).
Average visibility in September
Adak, AK
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, September, October and November (6mi).
The months with the lowest visibility are January, February, March, July, August and December (5mi).
Adak, Alaska, USA
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