September weather forecastMossyrock, WA
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Mossyrock, Washington, with temperature in the range of an average low of 45°F (7.2°C) and an average high of 69.1°F (20.6°C).Temperature
In Mossyrock, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's moderately hot 75.9°F (24.4°C) to an agreeable 69.1°F (20.6°C). Despite soaring daytime temperatures, Mossyrock registers a consistent average low-temperature of 45°F (7.2°C) in September.Humidity
The average relative humidity in September is 76%.Rainfall
In September, the rain falls for 11.8 days. Throughout September, 1.93" (49mm) of precipitation is accumulated. In Mossyrock, during the entire year, the rain falls for 178.8 days and collects up to 40.47" (1028mm) of precipitation.Snowfall
In Mossyrock, snow does not fall in May through October.Daylight
In Mossyrock, the average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:31 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:50 pm PDT.
Sunshine
In Mossyrock, the average sunshine in September is 8.7h.UV index
In Mossyrock, 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 the average person.Note: The UV index of 3 during September translates into the following guidance:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mossyrock, WA
- Average high temperature in September: 69.1°F
The warmest month (with the highest average high temperature) is August (75.9°F).
The month with the lowest average high temperature is December (41.2°F).
- Average low temperature in September: 45°F
The month with the highest average low temperature is August (47.3°F).
The coldest month (with the lowest average low temperature) is December (30.7°F).
Average pressure in September
Mossyrock, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in September
Mossyrock, WA
- Average wind speed in September: 3.7mph
The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in September
Mossyrock, WA
- Average humidity in September: 76%
The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is July (71%).
Average rainfall in September
Mossyrock, WA
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is January (6.46").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in September
Mossyrock, WA
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is March (20.3 days).
The month with the least rainy days is July (6.3 days).
Average snowfall in September
Mossyrock, WA
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.51").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Mossyrock, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (6 days).
The months with the least snowfall days are June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Mossyrock, 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 42min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 3h and 48min).
Average sunshine days in September
Mossyrock, WA
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is August (23.2 days).
The month with the least sunshine days is February (8.2 days).
Average UV index in September
Mossyrock, 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 November (UV index 1).
Average cloud cover in September
Mossyrock, WA
- Average cloud cover in September: 40
The month with the most cloud cover is March (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Mossyrock, WA
- Average visibility in September: 5mi
The months with the highest visibility are July, August and September (5mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (4mi).
