September weather forecastEthel, WA
September
Weather in September
September, the first month of the autumn in Ethel, is also an agreeable month, with an average temperature ranging between max 69.6°F (20.9°C) and min 46°F (7.8°C).Temperature
September's onset corresponds with a subtle shift in the average high-temperature, slightly moving from a warm 76.6°F (24.8°C) in August to an agreeable 69.6°F (20.9°C). Ethel registers a pronounced decline from daytime peak temperatures, averaging a frosty 46°F (7.8°C) lows in September.Humidity
In September, the average relative humidity is 78%.Rainfall
In September, the rain falls for 10.6 days. Throughout September, 1.18" (30mm) of precipitation is accumulated. In Ethel, during the entire year, the rain falls for 170.1 days and collects up to 22.56" (573mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Ethel, the average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:32 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:51 pm PDT.
Sunshine
In September, the average sunshine is 8.4h.UV index
The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 3 during September leads to these instructions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ethel, WA
- Average high temperature in September: 69.6°F
The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in September: 46°F
The month with the highest average low temperature is August (48.6°F).
The coldest month (with the lowest average low temperature) is December (32.4°F).
Average pressure in September
Ethel, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in September
Ethel, WA
- Average wind speed in September: 3.5mph
The windiest month (with the highest average wind speed) is January (4.8mph).
The calmest months (with the lowest average wind speed) are August and September (3.5mph).
Average humidity in September
Ethel, WA
- Average humidity in September: 78%
The months with the highest relative humidity are January, February, November and December (88%).
The month with the lowest relative humidity is July (73%).
Average rainfall in September
Ethel, WA
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is January (3.54").
The driest months (with the least rainfall) are July and August (0.39").
Average rainfall days in September
Ethel, WA
- Average rainfall days in September: 10.6 days
The month with the highest number of rainy days is March (19.4 days).
The month with the least rainy days is August (6.1 days).
Average snowfall in September
Ethel, WA
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.81").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Ethel, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.4 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
Ethel, WA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 8h and 24min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 42min).
Average sunshine days in September
Ethel, WA
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is August (22.1 days).
The month with the least sunshine days is February (9 days).
Average UV index in September
Ethel, WA
- Average UV index in September: 3
The month with the highest UV index is 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
Ethel, WA
- Average cloud cover in September: 45
The months with the most cloud cover are February and March (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in September
Ethel, WA
- Average visibility in September: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
