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
The arrival of September brings an average high-temperature of a refreshing 64.9°F (18.3°C), subtly diverging from August's 68.2°F (20.1°C). Grays River records a mean low-temperature of 50.9°F (10.5°C) in September.Humidity
In September, the average relative humidity in Grays River is 83%.Rainfall
In Grays River, in September, it is raining for 12.3 days, with typically 1.89" (48mm) of accumulated precipitation. In Grays River, during the entire year, the rain falls for 195.9 days and collects up to 40.59" (1031mm) of precipitation.Snowfall
In Grays River, snow does not fall in April through November.Daylight
In Grays River, Washington, 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 September, the average sunshine is 8.6h.UV index
In Grays River, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A typical high UV index of 4 in September suggests the following recommendations:
Exercise prevention - Warding off sunburn is urged. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Frequently asked questions
What is the usual temperature for Grays River in September?
What is the average humidity in September in Grays River?
How many days does it rain in September in Grays River?
When it does not snow in Grays River?
How many hours of daylight does Grays River have in September?
When is the sunrise / sunset in September in Grays River?
How many hours of sunshine does Grays River have in September?
How high is the UV index in September in Grays River?
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 3min
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 4min
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).
Grays River, Washington, USA
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