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 average high-temperature during September is a still refreshing 63.7°F (17.6°C), almost matching the conditions of the preceding month. Copalis Beach temperatures generally rest at a low of 52.7°F (11.5°C) during the September nights.Humidity
In September, the average relative humidity is 83%.Rainfall
In Copalis Beach, during September, the rain falls for 10.6 days and regularly aggregates up to 1.02" (26mm) of precipitation. Throughout the year, in Copalis Beach, there are 152.8 rainfall days, and 19.41" (493mm) of precipitation is accumulated.Snowfall
April through October and December are months without snowfall in Copalis Beach, Washington.Daylight
In September, the average length of the day is 12h and 32min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:55 pm. On the last day of September, in Copalis Beach, Washington, sunrise is at 7:15 am and sunset at 6:57 pm PDT.
Sunshine
In Copalis Beach, the average sunshine in September is 8.4h.UV index
The months with the highest UV index in Copalis Beach are May through September, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Frequently asked questions
What is the average September temperature in Copalis Beach?
What is the average humidity in September in Copalis Beach?
How many days does it rain in September in Copalis Beach?
When it does not snow in Copalis Beach?
What is the average length of the day in September in Copalis Beach?
What time are sunrise and sunset in September in Copalis Beach?
How many hours of sunshine does Copalis Beach have in September?
What are the months with the highest UV index in Copalis Beach?
How high is the UV index in September in Copalis Beach?
Average temperature in September
Copalis Beach, WA
- Average high temperature in September: 63.7°F
The warmest month (with the highest average high temperature) is August (65.8°F).
The month with the lowest average high temperature is December (45.5°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is August (54.5°F).
The coldest month (with the lowest average low temperature) is December (39.7°F).
Average pressure in September
Copalis Beach, WA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is July (30.08"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).
Average wind speed in September
Copalis Beach, WA
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is September (7.1mph).
Average humidity in September
Copalis Beach, WA
- Average humidity in September: 83%
The month with the highest relative humidity is December (85%).
The months with the lowest relative humidity are April, May and June (81%).
Average rainfall in September
Copalis Beach, WA
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in September
Copalis Beach, WA
- Average rainfall days in September: 10.6 days
The month with the highest number of rainy days is December (18.5 days).
The month with the least rainy days is July (5.6 days).
Average snowfall in September
Copalis Beach, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.02").
The months with the least snowfall are April, May, June, July, August, September, October and December (0").
Average snowfall days in September
Copalis Beach, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.6 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
Copalis Beach, WA
- Average daylight in September: 12h and 3min
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 2min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Copalis Beach, WA
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is July (23.8 days).
The month with the least sunshine days is December (10.7 days).
Average UV index in September
Copalis Beach, WA
- Average UV index in September: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Copalis Beach, WA
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
Copalis Beach, WA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Copalis Beach, Washington, USA
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