September weather forecastWoodinville, WA
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Woodinville, Washington, with temperature in the range of an average high of 68.7°F (20.4°C) and an average low of 50°F (10°C).Temperature
Woodinville in September experiences a gentle temperature dip, with average high-temperatures reducing from a moderately hot 74.8°F (23.8°C) in August to a pleasant 68.7°F (20.4°C). In September, Woodinville experiences a temperature dip to an average of 50°F (10°C) at night.Humidity
In Woodinville, the average relative humidity in September is 76%.Rainfall
In Woodinville, in September, it is raining for 12.5 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, there are 166.9 rainfall days, and 21.93" (557mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Woodinville, Washington.Daylight
The average length of the day in September is 12h and 33min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:07 am and sunset at 6:49 pm PDT.
Sunshine
In Woodinville, the average sunshine in September is 9.4h.UV index
In Woodinville, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 3 suggests these recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Woodinville, WA
- Average high temperature in September: 68.7°F
The warmest month (with the highest average high temperature) is August (74.8°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in September: 50°F
The month with the highest average low temperature is August (53.1°F).
The coldest months (with the lowest average low temperature) are February and December (35.1°F).
Average pressure in September
Woodinville, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in September
Woodinville, WA
- Average wind speed in September: 3.8mph
The windiest months (with the highest average wind speed) are January and March (5.3mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).
Average humidity in September
Woodinville, WA
- Average humidity in September: 76%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is July (71%).
Average rainfall in September
Woodinville, WA
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is January (2.87").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in September
Woodinville, WA
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is November (17.9 days).
The month with the least rainy days is August (6.9 days).
Average snowfall in September
Woodinville, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.42").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Woodinville, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Woodinville, WA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 9h and 24min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are January and December (Average sunshine: 4h and 24min).
Average sunshine days in September
Woodinville, WA
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is August (21.9 days).
The month with the least sunshine days is April (10.5 days).
Average UV index in September
Woodinville, WA
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Woodinville, WA
- Average cloud cover in September: 32
The months with the most cloud cover are January and December (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Woodinville, WA
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, November and December (5mi).
