September weather forecastFall City, WA
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Fall City, Washington, with an average temperature ranging between min 46°F (7.8°C) and max 67.8°F (19.9°C).Temperature
In September, the average high-temperature marginally decreases from a warm 74.8°F (23.8°C) in August to a comfortable 67.8°F (19.9°C). In September, Fall City endures a notable temperature shift from day to night, with lows averaging at a frosty 46°F (7.8°C).Humidity
The average relative humidity in September in Fall City is 75%.Rainfall
In Fall City, in September, it is raining for 12.6 days, with typically 1.89" (48mm) of accumulated precipitation. Throughout the year, there are 184.9 rainfall days, and 39.96" (1015mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Fall City, Washington.Daylight
The average length of the day in September in Fall City is 12h and 33min.On the first day of September, sunrise is at 6:27 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:48 pm PDT.
Sunshine
In September, the average sunshine in Fall City is 8.9h.UV index
In Fall City, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 3 during September translates into the following guidance:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Fall City, WA
- Average high temperature in September: 67.8°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 (39.7°F).
- Average low temperature in September: 46°F
The month with the highest average low temperature is August (48.7°F).
The coldest month (with the lowest average low temperature) is December (29.8°F).
Average pressure in September
Fall City, WA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is August (29.99"Hg).
Average wind speed in September
Fall City, WA
- Average wind speed in September: 3.5mph
The windiest month (with the highest average wind speed) is January (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity in September
Fall City, WA
- Average humidity in September: 75%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is July (71%).
Average rainfall in September
Fall City, WA
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is January (6.1").
The driest months (with the least rainfall) are July and August (0.59").
Average rainfall days in September
Fall City, WA
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is March (20.5 days).
The month with the least rainy days is August (6.4 days).
Average snowfall in September
Fall City, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.94").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Fall City, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.4 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
Fall City, 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: 8h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are January and December (Average sunshine: 3h and 54min).
Average sunshine days in September
Fall City, WA
- Average sunshine days in September: 16 days
The month with the most sunshine days is August (21.9 days).
The month with the least sunshine days is February (7.8 days).
Average UV index in September
Fall City, WA
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Fall City, WA
- Average cloud cover in September: 39
The months with the most cloud cover are January, February, March and December (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Fall City, WA
- Average visibility in September: 5mi
The months with the highest visibility are May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
