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
The shift from August to September involves a decrease in the average high-temperature, dropping from a hot 86.2°F (30.1°C) to a warm 75.4°F (24.1°C). Satus records an average low of 54.3°F (12.4°C) throughout the nights in September.Humidity
In September, the average relative humidity is 46%.Rainfall
In September, the rain falls for 4.8 days. Throughout September, 0.16" (4mm) of precipitation is accumulated. In Satus, during the entire year, the rain falls for 78 days and collects up to 3.39" (86mm) of precipitation.Snowfall
January through March, September, November and December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Satus, during the entire year, snow falls for 14.9 days and aggregates up to 3.11" (79mm) of snow.Daylight
The average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:22 am and sunset at 7:38 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:41 pm PDT.
Sunshine
In September, the average sunshine is 11h.UV index
In Satus, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How much does it rain in September?
When does it start to snow?
How many hours of daylight does Satus have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Satus have in September?
What is the UV index intensity in September?
Average temperature in September
Satus, WA
- Average high temperature in September: 75.4°F
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is December (36.5°F).
- Average low temperature in September: 54.3°F
The month with the highest average low temperature is August (60.8°F).
The coldest month (with the lowest average low temperature) is December (25.5°F).
Average pressure in September
Satus, WA
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).
Average wind speed in September
Satus, WA
- Average wind speed in September: 6.4mph
The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest month (with the lowest average wind speed) is December (4.8mph).
Average humidity in September
Satus, WA
- Average humidity in September: 46%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is July (38%).
Average rainfall in September
Satus, WA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is May (0.63").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in September
Satus, WA
- Average rainfall days in September: 4.8 days
The month with the highest number of rainy days is March (9.9 days).
The months with the least rainy days are July and August (2.8 days).
Average snowfall in September
Satus, WA
- Average snowfall in September: 0.04"
The months with the highest snowfall are January, February and December (0.94").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in September
Satus, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is December (4.7 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Satus, 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 42min).
- Average sunshine in September: 11h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in September
Satus, WA
- Average sunshine days in September: 22.7 days
The month with the most sunshine days is July (26.6 days).
The month with the least sunshine days is March (17.3 days).
Average UV index in September
Satus, WA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Satus, WA
- Average cloud cover in September: 16
The month with the most cloud cover is January (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in September
Satus, WA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
Satus, Washington, USA
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