September weather forecastSekiu, WA
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Sekiu, Washington, with temperature in the range of an average low of 49.5°F (9.7°C) and an average high of 63°F (17.2°C).Temperature
Sekiu's weather in September, with an average high-temperature of a still comfortable 63°F (17.2°C), subtly shifts from August's 67.6°F (19.8°C). Sekiu, in the month of September, anticipates a consistent average low-temperature of 49.5°F (9.7°C).Humidity
In September, the average relative humidity is 82%.Rainfall
In Sekiu, in September, it is raining for 9.9 days, with typically 0.98" (25mm) of accumulated precipitation. Throughout the year, there are 142.6 rainfall days, and 19.61" (498mm) of precipitation is accumulated.Snowfall
January through April, September and December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 5.1 snowfall days, and 2.17" (55mm) of snow is accumulated.Daylight
In Sekiu, the average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:57 pm. On the last day of September, sunrise is at 7:16 am and sunset at 6:57 pm PDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 3 in September converts into the following recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sekiu, WA
- Average high temperature in September: 63°F
The warmest month (with the highest average high temperature) is August (67.6°F).
The month with the lowest average high temperature is December (42.4°F).
- Average low temperature in September: 49.5°F
The month with the highest average low temperature is August (50.7°F).
The coldest month (with the lowest average low temperature) is February (36°F).
Average pressure in September
Sekiu, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is July (30.07"Hg).
The month with the lowest atmospheric pressure is March (29.98"Hg).
Average wind speed in September
Sekiu, WA
- Average wind speed in September: 4.2mph
The windiest month (with the highest average wind speed) is January (7.4mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in September
Sekiu, WA
- Average humidity in September: 82%
The months with the highest relative humidity are January and December (87%).
The months with the lowest relative humidity are May, July and August (80%).
Average rainfall in September
Sekiu, WA
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is January (3.66").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in September
Sekiu, WA
- Average rainfall days in September: 9.9 days
The month with the highest number of rainy days is November (16.5 days).
The month with the least rainy days is August (5.1 days).
Average snowfall in September
Sekiu, WA
- Average snowfall in September: 0.04"
The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August, October and November (0").
Average snowfall days in September
Sekiu, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Sekiu, WA
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 8h and 36min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Sekiu, WA
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is July (23 days).
The month with the least sunshine days is November (11.7 days).
Average UV index in September
Sekiu, WA
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Sekiu, WA
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Sekiu, WA
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, October, November and December (6mi).
The months with the lowest visibility are January, May, June, July, August and September (5mi).
