September weather forecast
Darrington, WA

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Weather in September

The first month of the autumn, September, is still a comfortable month in Darrington, Washington, with an average temperature ranging between min 39.7°F (4.3°C) and max 62.8°F (17.1°C).

Temperature

The start of September involves a subtle temperature drop, shifting from an agreeable 71.2°F (21.8°C) in August to a refreshing 62.8°F (17.1°C). A dramatic downturn marks the September nights in Darrington, with lows averaging at an icy 39.7°F (4.3°C).

Humidity

The average relative humidity in September in Darrington is 75%.

Rainfall

In September, in Darrington, the rain falls for 14 days. Throughout September, 2.4" (61mm) of precipitation is accumulated. Throughout the year, there are 124 rainfall days, and 55.28" (1404mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Darrington, Washington, 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. Throughout the year, there are 142 snowfall days, and 321.93" (8177mm) of snow is accumulated.

Daylight

In September, the average length of the day is 12h and 34min.
On the first day of September in Darrington, 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

In Darrington, the average sunshine in September is 9.1h.

UV index

The average daily maximum UV index in September in Darrington is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The daily high UV index of 2 during September translates into the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
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Frequently asked questions

What is the average September temperature in Darrington?

The average high-temperature, in September, in Darrington, is 62.8°F (17.1°C), while the average low-temperature is 39.7°F (4.3°C).

What is the average humidity in September in Darrington?

In Darrington, Washington, the average relative humidity in September is 75%.

How much does it rain in Darrington in September?

In Darrington, Washington, in September, during 14 rainfall days, 2.4" (61mm) of precipitation is typically accumulated.

When does it start snowing in Darrington?

September is the first month it typically snows. Throughout September, in the average 1.4 snowfall days, it receives 1.3" (33mm) of snow.

How many hours of daylight does Darrington have in September?

In September, the average day length in Darrington, Washington, is 12h and 34min.

What time are sunrise and sunset in September in Darrington?

In September, on the first day of the month, sunrise is at 6:25 am and sunset at 7:46 pm. On the last day of the month, in Darrington, Washington, sunrise is at 7:05 am and sunset at 6:46 pm PDT.

How many hours of sunshine does Darrington have in September?

In September, the average sunshine duration is 9.1h.

What is the UV index intensity in September in Darrington?

The average daily maximum UV index in September in Darrington, Washington, is 2. A UV Index reading of 2, and below, represents a low health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Darrington, WA

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).

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Average pressure in September
Darrington, WA

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).

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Average wind speed in September
Darrington, WA

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).

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Average humidity in September
Darrington, WA

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%).

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Average rainfall in September
Darrington, WA

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").

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Average rainfall days in September
Darrington, WA

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).

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Average snowfall in September
Darrington, WA

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").

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Average snowfall days in September
Darrington, WA

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).

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Average daylight in September /
Average sunshine in September
Darrington, WA

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).

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Average sunshine days in September
Darrington, WA

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).

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Average UV index in September
Darrington, WA

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).

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Average cloud cover in September
Darrington, WA

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).

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Average visibility in September
Darrington, WA

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).

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Darrington, Washington, USA

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