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
In September, the average high-temperature marginally drops from a moderately hot 80.2°F (26.8°C) in August to an agreeable 72.5°F (22.5°C). In September, the temperature in Salmon Creek, Washington, registers a significant dip to an average of 50.5°F (10.3°C) at night.Humidity
In Salmon Creek, the average relative humidity in September is 72%.Rainfall
In September, the rain falls for 11.5 days. Throughout September, 1.81" (46mm) of precipitation is accumulated. In Salmon Creek, during the entire year, the rain falls for 179.8 days and collects up to 35.35" (898mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Salmon Creek, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:32 am and sunset at 7:47 pm. On the last day of September, in Salmon Creek, Washington, sunrise is at 7:08 am and sunset at 6:51 pm PDT.
Sunshine
The average sunshine in September is 9.2h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 4 translates into these guidelines:
Undertake protective steps - Recommendations to avoid sunburn are issued. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Salmon Creek?
What is the average humidity in September in Salmon Creek?
How many days does it rain in September in Salmon Creek?
When it does not snow in Salmon Creek?
What is the average length of the day in September in Salmon Creek?
When is the sunrise / sunset in September in Salmon Creek?
How long on average sun shines in September in Salmon Creek?
What is the UV index intensity in September in Salmon Creek?
Average temperature in September
Salmon Creek, WA
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (43.3°F).
- Average low temperature in September: 50.5°F
The month with the highest average low temperature is August (53.1°F).
The coldest month (with the lowest average low temperature) is December (33.4°F).
Average pressure in September
Salmon Creek, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in September
Salmon Creek, WA
- Average wind speed in September: 3.9mph
The windiest month (with the highest average wind speed) is January (5.2mph).
The calmest months (with the lowest average wind speed) are August and September (3.9mph).
Average humidity in September
Salmon Creek, WA
- Average humidity in September: 72%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is August (67%).
Average rainfall in September
Salmon Creek, WA
- Average rainfall in September: 1.81"
The wettest months (with the highest rainfall) are January and December (5.2").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in September
Salmon Creek, WA
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is March (20.3 days).
The month with the least rainy days is August (5.1 days).
Average snowfall in September
Salmon Creek, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Salmon Creek, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.8 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
Salmon Creek, 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 48min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days in September
Salmon Creek, WA
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is July (23.7 days).
The month with the least sunshine days is February (7.8 days).
Average UV index in September
Salmon Creek, WA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Salmon Creek, WA
- Average cloud cover in September: 34
The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in September
Salmon Creek, WA
- Average visibility in September: 6mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).
Salmon Creek, Washington, USA
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