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
September signifies a minor drop in average high-temperature, transitioning from an agreeable 71.2°F (21.8°C) in August to a comfortable 62.8°F (17.1°C). Darrington observes a substantial disparity between daytime high and the average low-temperature of 39.7°F (4.3°C) during September nights.Humidity
In Darrington, the average relative humidity in September is 75%.Rainfall
In Darrington, during September, the rain falls for 14 days and regularly aggregates up to 2.4" (61mm) of precipitation. In Darrington, during the entire year, the rain falls for 124 days and collects up to 55.28" (1404mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 1.4 snowfall days, it receives 1.3" (33mm) of snow. In Darrington, during the entire year, snow falls for 142 days and aggregates up to 321.93" (8177mm) of snow.Daylight
In Darrington, the average length of the day in September is 12h and 34min.On the first day of September, sunrise is at 6:25 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:46 pm PDT.
Sunshine
The average sunshine in September is 9.1h.UV index
The average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 2 transforms into these recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Consider carefully! The reflective quality of snow can almost 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 many days does it rain in September?
When does it start to snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Darrington have in September?
How high is the UV index in September in Darrington?
Average temperature in September
Darrington, WA
- Average high temperature in September: 62.8°F
The warmest month (with the highest average high temperature) is August (71.2°F).
The month with the lowest average high temperature is December (30.7°F).
- Average low temperature in September: 39.7°F
The month with the highest average low temperature is August (43.7°F).
The coldest month (with the lowest average low temperature) is December (19.6°F).
Average pressure in September
Darrington, WA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).
Average wind speed in September
Darrington, WA
- Average wind speed in September: 3.4mph
The windiest month (with the highest average wind speed) is January (4.7mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity in September
Darrington, WA
- Average humidity in September: 75%
The months with the highest relative humidity are January, February and March (91%).
The months with the lowest relative humidity are July and August (71%).
Average rainfall in September
Darrington, WA
- Average rainfall in September: 2.4"
The wettest month (with the highest rainfall) is January (9.25").
The driest month (with the least rainfall) is August (0.87").
Average rainfall days in September
Darrington, WA
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is June (17.5 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in September
Darrington, WA
- Average snowfall in September: 1.3"
The month with the highest snowfall is January (71.57").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Darrington, WA
- Average snowfall days in September: 1.4 days
The month with the highest number of snowfall days is March (22.8 days).
The month with the least snowfall days is August (0 days).
Average daylight in September /
Average sunshine in September
Darrington, WA
- Average daylight in September: 12h and 4min
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 1min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Darrington, WA
- Average sunshine days in September: 13.1 days
The month with the most sunshine days is August (18.1 days).
The month with the least sunshine days is April (6.5 days).
Average UV index in September
Darrington, WA
- Average UV index in September: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, October and November (UV index 1).
Average cloud cover in September
Darrington, WA
- Average cloud cover in September: 39
The month with the most cloud cover is March (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Darrington, WA
- Average visibility in September: 5mi
The months with the highest visibility are June, July, August and September (5mi).
The months with the lowest visibility are January and March (3mi).
Darrington, Washington, USA
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