September weather forecastGrays River, WA
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Grays River, Washington, with an average temperature fluctuating between 64.9°F (18.3°C) and 50.9°F (10.5°C).Temperature
The introduction of September sees an average high-temperature of a comfortable 64.9°F (18.3°C), hardly deviating from August. During the nights in September, Grays River experiences a consistent average temperature of 50.9°F (10.5°C).Humidity
In Grays River, the average relative humidity in September is 83%.Rainfall
In Grays River, in September, during 12.3 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. Throughout the year, there are 195.9 rainfall days, and 40.59" (1031mm) of precipitation is accumulated.Snowfall
In Grays River, Washington, snow does not fall in April through November.Daylight
The average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:52 pm. On the last day of September, sunrise is at 7:12 am and sunset at 6:55 pm PDT.
Sunshine
In Grays River, the average sunshine in September is 8.6h.UV index
In Grays River, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 4 in September transforms into this advice:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Minimize direct exposure to the Sun during midday when its radiation is at its peak. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Grays River, WA
- Average high temperature in September: 64.9°F
The warmest month (with the highest average high temperature) is August (68.2°F).
The month with the lowest average high temperature is December (44.6°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is August (52.5°F).
The coldest month (with the lowest average low temperature) is December (37.6°F).
Average pressure in September
Grays River, WA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are March and September (30.02"Hg).
Average wind speed in September
Grays River, WA
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in September
Grays River, WA
- Average humidity in September: 83%
The months with the highest relative humidity are January, February, November and December (85%).
The months with the lowest relative humidity are May and July (81%).
Average rainfall in September
Grays River, WA
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is December (6.42").
The driest months (with the least rainfall) are July and August (0.55").
Average rainfall days in September
Grays River, WA
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is December (21.9 days).
The month with the least rainy days is August (7.8 days).
Average snowfall in September
Grays River, WA
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.87").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Grays River, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Grays River, WA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Grays River, WA
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is August (19.7 days).
The month with the least sunshine days is February (7.2 days).
Average UV index in September
Grays River, WA
- Average UV index in September: 4
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
Grays River, WA
- Average cloud cover in September: 39
The months with the most cloud cover are January and February (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Grays River, WA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are July, August and September (5mi).
