September weather forecastKupreanof, AK
September
Weather in September
September, the first month of the autumn in Kupreanof, is also a fresh month, with an average temperature varying between 46.4°F (8°C) and 54.3°F (12.4°C).Temperature
The transition into September shows a subtle variation to a fresh 54.3°F (12.4°C) from August's 59°F (15°C) in the average high-temperature. During the nights of September, Kupreanof records an average temperature of 46.4°F (8°C), a minor drop from daytime peaks.Humidity
The average relative humidity in September is 84%.Rainfall
In September, the rain falls for 17.5 days. Throughout September, 5.12" (130mm) of precipitation is accumulated. In Kupreanof, Alaska, during the entire year, the rain falls for 197.9 days and collects up to 53.03" (1347mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 44min.On the first day of the month, sunrise is at 5:56 am and sunset at 7:46 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:27 pm AKDT.
Sunshine
The average sunshine in September is 6.7h.UV index
In Kupreanof, the average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 2 in September translates into these instructions:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Kupreanof, AK
- Average high temperature in September: 54.3°F
The warmest month (with the highest average high temperature) is July (59.7°F).
The month with the lowest average high temperature is December (32.4°F).
- Average low temperature in September: 46.4°F
The month with the highest average low temperature is July (50.2°F).
The coldest month (with the lowest average low temperature) is February (25.9°F).
Average pressure in September
Kupreanof, AK
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is July (30.05"Hg).
The month with the lowest atmospheric pressure is November (29.8"Hg).
Average wind speed in September
Kupreanof, AK
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest month (with the lowest average wind speed) is July (3.9mph).
Average humidity in September
Kupreanof, AK
- Average humidity in September: 84%
The months with the highest relative humidity are January and August (86%).
The month with the lowest relative humidity is May (81%).
Average rainfall in September
Kupreanof, AK
- Average rainfall in September: 5.12"
The wettest month (with the highest rainfall) is October (6.3").
The driest month (with the least rainfall) is May (2.01").
Average rainfall days in September
Kupreanof, AK
- Average rainfall days in September: 17.5 days
The month with the highest number of rainy days is October (20.1 days).
The month with the least rainy days is February (9.5 days).
Average snowfall in September
Kupreanof, AK
- Average snowfall in September: 0"
The month with the highest snowfall is March (13.46").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Kupreanof, AK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Kupreanof, AK
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 17h and 42min).
The month with the shortest days is December (Average daylight: 6h and 54min).
- Average sunshine in September: 6h and 42min
The month with the most sunshine is May (Average sunshine: 7h and 24min).
The months with the least sunshine are January and November (Average sunshine: 3h and 24min).
Average sunshine days in September
Kupreanof, AK
- Average sunshine days in September: 11.5 days
The month with the most sunshine days is December (12.5 days).
The month with the least sunshine days is November (8 days).
Average UV index in September
Kupreanof, AK
- Average UV index in September: 2
The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are November and December (UV index 1).
Average cloud cover in September
Kupreanof, AK
- Average cloud cover in September: 55
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are February and May (Cloud cover 54).
Average visibility in September
Kupreanof, AK
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
