September weather forecastNooksack, WA
September
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
Average daylight in September /
Average sunshine in September
Nooksack, WA
- Average daylight in September: 12h and 36min
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).
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).
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).
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).
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).
