September weather forecast
Sekiu, WA

Share

Weather in September

The first month of the autumn, September, is still a refreshing month in Sekiu, Washington, with temperature in the range of an average low of 49.5°F (9.7°C) and an average high of 63°F (17.2°C).

Temperature

Sekiu's weather in September, with an average high-temperature of a still comfortable 63°F (17.2°C), subtly shifts from August's 67.6°F (19.8°C). Sekiu, in the month of September, anticipates a consistent average low-temperature of 49.5°F (9.7°C).

Humidity

In September, the average relative humidity is 82%.

Rainfall

In Sekiu, in September, it is raining for 9.9 days, with typically 0.98" (25mm) of accumulated precipitation. Throughout the year, there are 142.6 rainfall days, and 19.61" (498mm) of precipitation is accumulated.

Snowfall

January through April, September 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. Throughout the year, there are 5.1 snowfall days, and 2.17" (55mm) of snow is accumulated.

Daylight

In Sekiu, the average length of the day in September is 12h and 34min.
On the first day of the month, sunrise is at 6:36 am and sunset at 7:57 pm. On the last day of September, sunrise is at 7:16 am and sunset at 6:57 pm PDT.

Sunshine

In September, the average sunshine is 8.6h.

UV index

In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 3 in September converts into the following recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.

Frequently asked questions

What are the temperatures in September?

The high-temperature, in September, in Sekiu, records 63°F (17.2°C), while the low-temperature is 49.5°F (9.7°C).

What is the average humidity in September?

The average relative humidity in September is 82%.

How much does it rain in September?

In Sekiu, during September, the rain falls for 9.9 days and regularly aggregates up to 0.98" (25mm) of precipitation.

When does it start to snow?

September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow.

What is the average length of the day in September?

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

When are sunrise and sunset in September?

On the first day of September, sunrise is at 6:36 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 6:57 pm PDT.

How long on average sun shines in September?

In September, the average sunshine duration is 8.6h.

What is the UV index reading in September?

The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Sekiu, WA

Average temperature in September - Sekiu, WA
  • Average high temperature in September: 63°F

The warmest month (with the highest average high temperature) is August (67.6°F).
The month with the lowest average high temperature is December (42.4°F).

  • Average low temperature in September: 49.5°F

The month with the highest average low temperature is August (50.7°F).
The coldest month (with the lowest average low temperature) is February (36°F).

Average pressure in September
Sekiu, WA

Average pressure in September - Sekiu, WA
  • Average pressure in September: 30.01"Hg

The month with the highest atmospheric pressure is July (30.07"Hg).
The month with the lowest atmospheric pressure is March (29.98"Hg).

Average wind speed in September
Sekiu, WA

Average wind speed in September - Sekiu, WA
  • Average wind speed in September: 4.2mph

The windiest month (with the highest average wind speed) is January (7.4mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).

Average humidity in September
Sekiu, WA

Average humidity in September - Sekiu, WA
  • Average humidity in September: 82%

The months with the highest relative humidity are January and December (87%).
The months with the lowest relative humidity are May, July and August (80%).

Average rainfall in September
Sekiu, WA

Average rainfall in September - Sekiu, WA
  • Average rainfall in September: 0.98"

The wettest month (with the highest rainfall) is January (3.66").
The driest month (with the least rainfall) is July (0.28").

Average rainfall days in September
Sekiu, WA

Average rainfall days in September - Sekiu, WA
  • Average rainfall days in September: 9.9 days

The month with the highest number of rainy days is November (16.5 days).
The month with the least rainy days is August (5.1 days).

Average snowfall in September
Sekiu, WA

Average snowfall in September - Sekiu, WA
  • Average snowfall in September: 0.04"

The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August, October and November (0").

Average snowfall days in September
Sekiu, WA

Average snowfall days in September - Sekiu, WA
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are May, June, July, August and October (0 days).

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

Average daylight in September / Average sunshine in September - Sekiu, 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: 8h and 4min

The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in September
Sekiu, WA

Average sunshine days in September - Sekiu, WA
  • Average sunshine days in September: 17.5 days

The month with the most sunshine days is July (23 days).
The month with the least sunshine days is November (11.7 days).

Average UV index in September
Sekiu, WA

Average UV index in September - Sekiu, WA
  • Average UV index in September: 3

The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in September
Sekiu, WA

Average cloud cover in September - Sekiu, WA
  • Average cloud cover in September: 39

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 32).

Average visibility in September
Sekiu, WA

Average visibility in September - Sekiu, WA
  • Average visibility in September: 5mi

The months with the highest visibility are February, March, April, October, November and December (6mi).
The months with the lowest visibility are January, May, June, July, August and September (5mi).

Sekiu, Washington, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location