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
September's arrival brings an average high-temperature of a still refreshing 63°F (17.2°C), demonstrating subtle variation from the preceding month. In Clallam Bay, September nights witness a steady temperature drop to a frosty 49.5°F (9.7°C).Humidity
In Clallam Bay, the average relative humidity in September is 82%.Rainfall
In Clallam Bay, in September, during 9.9 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, there are 142.6 rainfall days, and 19.61" (498mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, September and December. September is the first month it typically snows in Clallam Bay. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 5.1 snowfall days, and 2.17" (55mm) of snow is accumulated.Daylight
In Clallam Bay, the average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:57 pm. On the last day of September, sunrise is at 7:16 am and sunset at 6:57 pm PDT.
Sunshine
In Clallam Bay, the average sunshine in September is 8.6h.UV index
In Clallam Bay, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 3 translates into these guidelines:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Clallam Bay in September?
What is the average humidity in September?
How many days does it rain in September?
When does it start snowing in Clallam Bay?
How many hours of daylight does Clallam Bay have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Clallam Bay have in September?
What is the UV index intensity in September?
Average temperature in September
Clallam Bay, WA
- Average high temperature in September: 63°F
The warmest month (with the highest average high temperature) is August (67.6°F).
The month with the lowest average high temperature is December (42.4°F).
- Average low temperature in September: 49.5°F
The month with the highest average low temperature is August (50.7°F).
The coldest month (with the lowest average low temperature) is February (36°F).
Average pressure in September
Clallam Bay, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is July (30.07"Hg).
The month with the lowest atmospheric pressure is March (29.98"Hg).
Average wind speed in September
Clallam Bay, WA
- Average wind speed in September: 4.2mph
The windiest month (with the highest average wind speed) is January (7.4mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in September
Clallam Bay, WA
- Average humidity in September: 82%
The months with the highest relative humidity are January and December (87%).
The months with the lowest relative humidity are May, July and August (80%).
Average rainfall in September
Clallam Bay, WA
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is January (3.66").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in September
Clallam Bay, WA
- Average rainfall days in September: 9.9 days
The month with the highest number of rainy days is November (16.5 days).
The month with the least rainy days is August (5.1 days).
Average snowfall in September
Clallam Bay, WA
- Average snowfall in September: 0.04"
The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August, October and November (0").
Average snowfall days in September
Clallam Bay, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Clallam Bay, WA
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 8h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Clallam Bay, WA
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is July (23 days).
The month with the least sunshine days is November (11.7 days).
Average UV index in September
Clallam Bay, WA
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Clallam Bay, WA
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Clallam Bay, WA
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, October, November and December (6mi).
The months with the lowest visibility are January, May, June, July, August and September (5mi).
Clallam Bay, Washington, USA
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