September weather forecast
Nooksack, WA

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Weather in September

The first month of the autumn, September, is also an enjoyable month in Nooksack, Washington, with an average temperature fluctuating between 47.5°F (8.6°C) and 66°F (18.9°C).

Temperature

September's arrival aligns with a minor decrease in average high-temperatures, from August's pleasant 73.2°F (22.9°C) to an enjoyable 66°F (18.9°C). During the nights in September, an average low-temperature of 47.5°F (8.6°C) is observed in Nooksack, Washington.

Humidity

In September, the average relative humidity is 78%.

Rainfall

In Nooksack, in September, it is raining for 12.9 days, with typically 2.56" (65mm) of accumulated precipitation. Throughout the year, there are 194.7 rainfall days, and 48.66" (1236mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in Nooksack.

Daylight

In September, the average length of the day in Nooksack, Washington, is 12h and 34min.
On the first day of September in Nooksack, sunrise is at 6:27 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:49 pm PDT.

Sunshine

In Nooksack, the average sunshine in September is 9h.

UV index

In Nooksack, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 3 in September converts into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Boost your sun resistance with garments that are densely woven yet spacious.
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Frequently asked questions

What is the usual temperature for Nooksack in September?

In September, in Nooksack, the average high-temperature is 66°F (18.9°C), and the average low-temperature is 47.5°F (8.6°C).

What is the average humidity in September in Nooksack?

In Nooksack, the average relative humidity in September is 78%.

How much does it rain in Nooksack in September?

In September, the rain falls for 12.9 days. Throughout September, 2.56" (65mm) of precipitation is accumulated.

When it does not snow in Nooksack?

May through October are months without snowfall in Nooksack.

What is the average length of the day in September in Nooksack?

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

When are sunrise and sunset in September in Nooksack?

On the first day of September, sunrise is at 6:27 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:49 pm PDT.

How many hours of sunshine does Nooksack have in September?

In Nooksack, Washington, the average sunshine duration in September is 9h.

What is the UV index reading in September in Nooksack?

In September, the average daily maximum UV index in Nooksack is 3. A UV Index of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to UV radiation.
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
Nooksack, WA

Average temperature in September - Nooksack, WA
  • Average high temperature in September: 66°F

The warmest month (with the highest average high temperature) is August (73.2°F).
The month with the lowest average high temperature is December (39.6°F).

  • Average low temperature in September: 47.5°F

The month with the highest average low temperature is August (51.3°F).
The coldest months (with the lowest average low temperature) are February and December (31.6°F).

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Average pressure in September
Nooksack, WA

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

The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March and August (30"Hg).

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Average wind speed in September
Nooksack, WA

Average wind speed in September - Nooksack, WA
  • Average wind speed in September: 3.4mph

The windiest month (with the highest average wind speed) is January (4.8mph).
The calmest month (with the lowest average wind speed) is August (3.2mph).

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Average humidity in September
Nooksack, WA

Average humidity in September - Nooksack, WA
  • Average humidity in September: 78%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is July (73%).

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Average rainfall in September
Nooksack, WA

Average rainfall in September - Nooksack, WA
  • Average rainfall in September: 2.56"

The wettest month (with the highest rainfall) is November (7.32").
The driest month (with the least rainfall) is July (1.02").

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Average rainfall days in September
Nooksack, WA

Average rainfall days in September - Nooksack, WA
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is March (21.6 days).
The month with the least rainy days is August (8.5 days).

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Average snowfall in September
Nooksack, WA

Average snowfall in September - Nooksack, WA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.99").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Nooksack, WA

Average snowfall days in September - Nooksack, WA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (4.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Nooksack, WA
  • Average daylight in September: 12h and 4min

The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).

  • Average sunshine in September: 9h and 0min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

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Average sunshine days in September
Nooksack, WA

Average sunshine days in September - Nooksack, WA
  • Average sunshine days in September: 15.2 days

The months with the most sunshine days are July and August (20 days).
The month with the least sunshine days is March (7.8 days).

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Average UV index in September
Nooksack, WA

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

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).

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Average cloud cover in September
Nooksack, WA

Average cloud cover in September - Nooksack, WA
  • Average cloud cover in September: 37

The months with the most cloud cover are January, March and December (Cloud cover 58).
The months with the least cloud cover are July and August (Cloud cover 28).

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Average visibility in September
Nooksack, WA

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

The months with the highest visibility are July and August (6mi).
The month with the lowest visibility is January (4mi).

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Nooksack, Washington, USA

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