September weather forecastShelter Bay, WA
September
Weather in September
September, the first month of the autumn in Shelter Bay, is also an enjoyable month, with an average temperature varying between 53.8°F (12.1°C) and 62.6°F (17°C).Temperature
Upon the onset of September, Shelter Bay witnesses an average high-temperature of a still enjoyable 62.6°F (17°C), showing a close resemblance to the prior month. Night temperatures during September experience a slight downturn, averaging a fresh 53.8°F (12.1°C).Humidity
The average relative humidity in September is 79%.Rainfall
In September, the rain falls for 9.4 days. Throughout September, 0.75" (19mm) of precipitation is accumulated. Throughout the year, there are 132.4 rainfall days, and 8.9" (226mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 34min.On the first day of September, sunrise is at 6:28 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:50 pm PDT.
Sunshine
The average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The UV index of 4 during September translates into the following guidance:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Shelter Bay, WA
- Average high temperature in September: 62.6°F
The warmest month (with the highest average high temperature) is July (66.6°F).
The month with the lowest average high temperature is December (43.7°F).
- Average low temperature in September: 53.8°F
The month with the highest average low temperature is August (56.1°F).
The coldest month (with the lowest average low temperature) is February (38.5°F).
Average pressure in September
Shelter Bay, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).
Average wind speed in September
Shelter Bay, WA
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is November (8.7mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in September
Shelter Bay, WA
- Average humidity in September: 79%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is July (76%).
Average rainfall in September
Shelter Bay, WA
- Average rainfall in September: 0.75"
The wettest month (with the highest rainfall) is February (1.3").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in September
Shelter Bay, WA
- Average rainfall days in September: 9.4 days
The month with the highest number of rainy days is December (13.7 days).
The month with the least rainy days is August (6.1 days).
Average snowfall in September
Shelter Bay, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.24").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Shelter Bay, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Shelter Bay, WA
- Average daylight in September: 12h and 36min
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: 9h and 30min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The months with the least sunshine are January and December (Average sunshine: 4h and 30min).
Average sunshine days in September
Shelter Bay, WA
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is July (23.3 days).
The month with the least sunshine days is February (11.8 days).
Average UV index in September
Shelter Bay, 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
Shelter Bay, WA
- Average cloud cover in September: 30
The month with the most cloud cover is December (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Shelter Bay, WA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
