September weather forecastSalkum, WA
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Salkum, Washington, with an average temperature varying between 69.3°F (20.7°C) and 45.5°F (7.5°C).Temperature
The beginning of September brings a slight decrease in the average high-temperature, transitioning from a warm 76.5°F (24.7°C) in August to an agreeable 69.3°F (20.7°C). A noteworthy temperature dip to a frosty 45.5°F (7.5°C) is observed during the nights of September in Salkum, Washington.Humidity
The average relative humidity in September is 77%.Rainfall
In Salkum, during September, the rain falls for 10.5 days and regularly aggregates up to 1.22" (31mm) of precipitation. In Salkum, Washington, during the entire year, the rain falls for 149 days and collects up to 19.37" (492mm) of precipitation.Snowfall
In Salkum, snow does not fall in May through October.Daylight
In Salkum, the average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:31 am and sunset at 7:48 pm. On the last day of September, in Salkum, sunrise is at 7:08 am and sunset at 6:51 pm PDT.
Sunshine
The average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index in Salkum is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Heed the precautions - It is counselled to guard against solar damage. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Salkum, WA
- Average high temperature in September: 69.3°F
The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is December (41.9°F).
- Average low temperature in September: 45.5°F
The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is December (31.8°F).
Average pressure in September
Salkum, 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
Salkum, WA
- Average wind speed in September: 3.7mph
The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in September
Salkum, WA
- Average humidity in September: 77%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are July and August (72%).
Average rainfall in September
Salkum, WA
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is January (2.64").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in September
Salkum, WA
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is March (16 days).
The month with the least rainy days is July (5.9 days).
Average snowfall in September
Salkum, WA
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.97").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Salkum, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.6 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
Salkum, WA
- Average daylight in September: 12h and 30min
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 30min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 42min).
Average sunshine days in September
Salkum, WA
- Average sunshine days in September: 18.2 days
The month with the most sunshine days is July (23.7 days).
The month with the least sunshine days is February (12.1 days).
Average UV index in September
Salkum, WA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in September
Salkum, WA
- Average cloud cover in September: 42
The month with the most cloud cover is March (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Salkum, WA
- Average visibility in September: 4mi
The months with the highest visibility are July and August (5mi).
The months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (4mi).
