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 sea temperature 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
September reveals a small adjustment in temperature, transitioning from an average high of a warm 73.8°F (23.2°C) in August to a pleasant 68.2°F (20.1°C). Suquamish reports an average low-temperature of 52.3°F (11.3°C) during the nights of September.Humidity
In September, the average relative humidity in Suquamish, Washington, is 76%.Rainfall
In Suquamish, in September, it is raining for 12.5 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, there are 169.8 rainfall days, and 22.44" (570mm) of precipitation is accumulated.Snowfall
In Suquamish, snow does not fall in May through October.Ocean temperature
August and September, with an average ocean temperature of 53.2°F (11.8°C), are months with the warmest seawater.Note: It is life-risking to swim in 53.2°F (11.8°C). Briefly staying in 55.4°F (13°C) waters feels unsettling, and temperatures below 50°F (10°C) might result in cold shock and loss of breath control, hinging on personal endurance.
Daylight
In Suquamish, the average length of the day in September is 12h and 33min.On the first day of September, sunrise is at 6:29 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:50 pm PDT.
Sunshine
The average sunshine in September is 9.4h.UV index
In September, the average daily maximum UV index in Suquamish, Washington, is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. When the Sun is at its strongest around midday, find shade and limit exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Frequently asked questions
What is the average September temperature in Suquamish?
What is the average humidity in September in Suquamish?
How much does it rain in Suquamish in September?
When it does not snow in Suquamish?
What months are the ocean warmest in Suquamish?
What is the ocean temperature in September in Suquamish?
What is the average length of the day in September in Suquamish?
When is the sunrise / sunset in September in Suquamish?
How long on average sun shines in September in Suquamish?
What is the UV index reading in September in Suquamish?
Average temperature in September
Suquamish, WA
- Average high temperature in September: 68.2°F
The warmest month (with the highest average high temperature) is August (73.8°F).
The month with the lowest average high temperature is December (43.5°F).
- Average low temperature in September: 52.3°F
The month with the highest average low temperature is August (55.2°F).
The coldest month (with the lowest average low temperature) is December (36.5°F).
Average pressure in September
Suquamish, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in September
Suquamish, WA
- Average wind speed in September: 4.3mph
The windiest months (with the highest average wind speed) are March and November (6.2mph).
The calmest months (with the lowest average wind speed) are July and August (3.7mph).
Average humidity in September
Suquamish, WA
- Average humidity in September: 76%
The months with the highest relative humidity are January, February, November and December (84%).
The months with the lowest relative humidity are July and August (72%).
Average rainfall in September
Suquamish, WA
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is January (3.43").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in September
Suquamish, WA
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is March (19.3 days).
The month with the least rainy days is August (6.2 days).
Average snowfall in September
Suquamish, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.4").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Suquamish, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Suquamish, WA
- Average sea temperature in September: 53.1°F
The best month for swimming (with the highest average sea temperature) is August (53.2°F).
The coldest month (with the lowest average sea temperature) is February (45.3°F).
Average daylight in September /
Average sunshine in September
Suquamish, WA
- Average daylight in September: 12h and 3min
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 2min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in September
Suquamish, WA
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is August (23 days).
The month with the least sunshine days is November (9.4 days).
Average UV index in September
Suquamish, WA
- Average UV index in September: 4
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
Suquamish, WA
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in September
Suquamish, WA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Suquamish, Washington, USA
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