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 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
Welcoming September, Four Lakes observes a shift in the average high-temperature, falling from August's warm 83.5°F (28.6°C) to a pleasant 72.5°F (22.5°C). Four Lakes witnesses an average low-temperature of 51.4°F (10.8°C) throughout the month of September.Humidity
The average relative humidity in September in Four Lakes, Washington, is 47%.Rainfall
In Four Lakes, in September, during 5.2 rainfall days, 0.35" (9mm) of precipitation is typically accumulated. Throughout the year, in Four Lakes, there are 78.7 rainfall days, and 7.72" (196mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.16" (4mm) of snow. In Four Lakes, during the entire year, snow falls for 37.4 days and aggregates up to 15.75" (400mm) of snow.Daylight
In Four Lakes, Washington, the average length of the day in September is 12h and 33min.On the first day of the month, sunrise is at 6:10 am and sunset at 7:30 pm. On the last day of September, in Four Lakes, sunrise is at 6:49 am and sunset at 6:30 pm PDT.
Sunshine
The average sunshine in September is 10.3h.UV index
In Four Lakes, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Guard yourself - An obligation to protect skin and eyes from harm exists. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Frequently asked questions
What are the temperatures in Four Lakes in September?
What is the average humidity in September in Four Lakes?
How much does it rain in Four Lakes in September?
When does it start to snow in Four Lakes?
What is the average length of the day in September in Four Lakes?
What time are sunrise and sunset in September in Four Lakes?
How many hours of sunshine does Four Lakes have in September?
How high is the UV index in September in Four Lakes?
Average temperature in September
Four Lakes, WA
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is August (83.5°F).
The month with the lowest average high temperature is December (32°F).
- Average low temperature in September: 51.4°F
The month with the highest average low temperature is August (59.7°F).
The coldest month (with the lowest average low temperature) is December (22.5°F).
Average pressure in September
Four Lakes, WA
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.9"Hg).
Average wind speed in September
Four Lakes, WA
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Four Lakes, WA
- Average humidity in September: 47%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (38%).
Average rainfall in September
Four Lakes, WA
- Average rainfall in September: 0.35"
The wettest month (with the highest rainfall) is May (1.06").
The driest months (with the least rainfall) are July and August (0.28").
Average rainfall days in September
Four Lakes, WA
- Average rainfall days in September: 5.2 days
The month with the highest number of rainy days is April (9.6 days).
The month with the least rainy days is February (3.2 days).
Average snowfall in September
Four Lakes, WA
- Average snowfall in September: 0.16"
The month with the highest snowfall is January (3.58").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Four Lakes, WA
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (9.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Four Lakes, 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: 10h and 2min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
Average sunshine days in September
Four Lakes, WA
- Average sunshine days in September: 23.5 days
The month with the most sunshine days is July (25.5 days).
The month with the least sunshine days is March (17.3 days).
Average UV index in September
Four Lakes, WA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Four Lakes, WA
- Average cloud cover in September: 20
The months with the most cloud cover are January and December (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in September
Four Lakes, WA
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Four Lakes, Washington, USA
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