September weather forecastKlawock, AK
September
Weather in September
Transitional weather is remarked again in September, denoting the inception of fall, with temperatures retreating to 46.9°F (8.3°C) to 56.5°F (13.6°C). Klawock enters the period of fall, experiencing shorter daylight hours and a slight increase in wind gust speed. Autumn proves harmonious, providing a balanced mix of sunny and cool days. The backdrop of a high cloud percentage converges with the autumn hues, rendering a picturesque aura in Klawock. As such, September proves a spectacle of stunning autumn landscapes under mild weather conditions.Temperature
The advent of September reveals an average high-temperature of a still refreshing 56.5°F (13.6°C), showing minimal difference from the prior month. September's nights observe an average temperature of 46.9°F (8.3°C).Humidity
The average relative humidity in September is 88%.Rainfall
In September, the rain falls for 19.4 days. Throughout September, 6.02" (153mm) of precipitation is accumulated. Throughout the year, in Klawock, there are 231.7 rainfall days, and 67.83" (1723mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 42min.On the first day of the month, sunrise is at 5:59 am and sunset at 7:44 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:29 pm AKDT.
Sunshine
The months with the most sunshine are May and September, with an average of 5.7h of sunshine.UV index
In September, the average daily maximum UV index in Klawock is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: A typical high UV index of 3 in September suggests the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Klawock, AK
- Average high temperature in September: 56.5°F
The warmest months (with the highest average high temperature) are July and August (60.4°F).
The month with the lowest average high temperature is December (36.5°F).
- Average low temperature in September: 46.9°F
The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is February (30.2°F).
Average pressure in September
Klawock, AK
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is July (30.06"Hg).
The month with the lowest atmospheric pressure is November (29.77"Hg).
Average wind speed in September
Klawock, AK
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is July (4.8mph).
Average humidity in September
Klawock, AK
- Average humidity in September: 88%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are March and May (84%).
Average rainfall in September
Klawock, AK
- Average rainfall in September: 6.02"
The wettest month (with the highest rainfall) is November (8.03").
The driest month (with the least rainfall) is May (2.83").
Average rainfall days in September
Klawock, AK
- Average rainfall days in September: 19.4 days
The month with the highest number of rainy days is November (22.5 days).
The month with the least rainy days is February (14.8 days).
Average snowfall in September
Klawock, AK
- Average snowfall in September: 0"
The month with the highest snowfall is March (10.35").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Klawock, AK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (10.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Klawock, AK
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 17h and 24min).
The month with the shortest days is December (Average daylight: 7h and 12min).
- Average sunshine in September: 5h and 42min
The months with the most sunshine are May and September (Average sunshine: 5h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in September
Klawock, AK
- Average sunshine days in September: 9.8 days
The month with the most sunshine days is July (11.1 days).
The month with the least sunshine days is November (5.3 days).
Average UV index in September
Klawock, AK
- Average UV index in September: 3
The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Klawock, AK
- Average cloud cover in September: 62
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is September (Cloud cover 62).
Average visibility in September
Klawock, AK
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (5mi).
The months with the lowest visibility are July and August (4mi).
