September weather forecastSilverdale, WA
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Silverdale, Washington, with an average temperature varying between 68.9°F (20.5°C) and 50.9°F (10.5°C).Temperature
The transition to September results in a modest reduction in average high-temperature, moving from a moderately hot 75.7°F (24.3°C) in August to a pleasant 68.9°F (20.5°C). Silverdale, in September, witnesses an average low-temperature of 50.9°F (10.5°C).Humidity
The average relative humidity in September is 76%.Rainfall
In Silverdale, during September, the rain falls for 12.7 days and regularly aggregates up to 1.54" (39mm) of precipitation. In Silverdale, during the entire year, the rain falls for 180.4 days and collects up to 26.93" (684mm) of precipitation.Snowfall
In Silverdale, snow does not fall in May through October.Ocean temperature
The months with the warmest seawater are August and September, with an average ocean temperature of 53.2°F (11.8°C).Note: Swimming in 53.2°F (11.8°C) is deemed hazardous. Exposure to temperatures below 50°F (10°C) leads to immediate severe cold shock and hyperventilation.
Daylight
In Silverdale, the average length of the day in September is 12h and 33min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:50 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:51 pm PDT.
Sunshine
The average sunshine in September is 9.5h.UV index
In Silverdale, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Silverdale, WA
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is August (75.7°F).
The month with the lowest average high temperature is December (42.8°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is August (54.1°F).
The coldest month (with the lowest average low temperature) is December (35.2°F).
Average pressure in September
Silverdale, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March and September (30.01"Hg).
Average wind speed in September
Silverdale, WA
- Average wind speed in September: 3.8mph
The windiest month (with the highest average wind speed) is March (5.3mph).
The calmest months (with the lowest average wind speed) are July and August (3.2mph).
Average humidity in September
Silverdale, WA
- Average humidity in September: 76%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is July (70%).
Average rainfall in September
Silverdale, WA
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is January (4.33").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in September
Silverdale, WA
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is March (20.1 days).
The month with the least rainy days is August (6.1 days).
Average snowfall in September
Silverdale, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.4").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Silverdale, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Silverdale, WA
- Average sea temperature in September: 53.1°F
The best month for swimming (with the highest average sea temperature) is August (53.2°F).
The coldest month (with the lowest average sea temperature) is February (45.3°F).
Average daylight in September /
Average sunshine in September
Silverdale, WA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 9h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 4h and 36min).
Average sunshine days in September
Silverdale, WA
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is August (21.8 days).
The month with the least sunshine days is February (8.7 days).
Average UV index in September
Silverdale, WA
- Average UV index in September: 4
The months with the highest UV index are June and 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
Silverdale, WA
- Average cloud cover in September: 31
The months with the most cloud cover are January and December (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Silverdale, WA
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, November and December (5mi).
