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
The shift from August to September coincides with a small decrease in the average high-temperature, down to a pleasant 70.3°F (21.3°C) from a moderately hot 77.7°F (25.4°C). During September, the temperature in North Hill, Washington, is averaged to a low of 50.4°F (10.2°C) at night.Humidity
In North Hill, Washington, the average relative humidity in September is 74%.Rainfall
In North Hill, during September, the rain falls for 10.5 days and regularly aggregates up to 0.91" (23mm) of precipitation. In North Hill, during the entire year, the rain falls for 138.2 days and collects up to 14.09" (358mm) of precipitation.Snowfall
In North Hill, Washington, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 32min.On the first day of September, sunrise is at 6:29 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:49 pm PDT.
Sunshine
In September, the average sunshine in North Hill, Washington, is 9.2h.UV index
In North Hill, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 4 during September translates into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Frequently asked questions
What is the temperature in September in North Hill?
What is the average humidity in September in North Hill?
How much does it rain in North Hill in September?
When it does not snow in North Hill?
How many hours of daylight does North Hill have in September?
When is the sunrise / sunset in September in North Hill?
How long on average sun shines in September in North Hill?
How high is the UV index in September in North Hill?
Average temperature in September
North Hill, WA
- Average high temperature in September: 70.3°F
The warmest month (with the highest average high temperature) is August (77.7°F).
The month with the lowest average high temperature is December (43.5°F).
- Average low temperature in September: 50.4°F
The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).
Average pressure in September
North Hill, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in September
North Hill, WA
- Average wind speed in September: 3.9mph
The windiest month (with the highest average wind speed) is March (5.3mph).
The calmest months (with the lowest average wind speed) are July and August (3.6mph).
Average humidity in September
North Hill, WA
- Average humidity in September: 74%
The months with the highest relative humidity are January and December (85%).
The month with the lowest relative humidity is July (68%).
Average rainfall in September
North Hill, WA
- Average rainfall in September: 0.91"
The wettest month (with the highest rainfall) is December (2.2").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in September
North Hill, WA
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is April (14.9 days).
The month with the least rainy days is August (5.7 days).
Average snowfall in September
North Hill, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
North Hill, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.4 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
North Hill, WA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in September
North Hill, WA
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (13 days).
Average UV index in September
North Hill, WA
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
North Hill, WA
- Average cloud cover in September: 35
The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
North Hill, WA
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, October, November and December (5mi).
North Hill, Washington, USA
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