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
A mild drop in Lilliwaup's average high-temperature is observed in September, transitioning from a moderately hot 76.6°F (24.8°C) in August to a pleasant 68.9°F (20.5°C). Lilliwaup, in September, observes a steady average low-temperature of 47.5°F (8.6°C).Humidity
In September, the average relative humidity is 78%.Rainfall
In Lilliwaup, during September, the rain falls for 12.3 days and regularly aggregates up to 1.85" (47mm) of precipitation. Throughout the year, there are 185.4 rainfall days, and 42.87" (1089mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In Lilliwaup, Washington, the average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:32 am and sunset at 7:51 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:53 pm PDT.
Sunshine
The average sunshine in September in Lilliwaup is 9h.UV index
In Lilliwaup, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: In September, a daily UV index of 3 turns into the following recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Around midday, solar radiation is most harmful; hence, exposure should be limited. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Lilliwaup?
What is the average humidity in September in Lilliwaup?
How many days does it rain in September in Lilliwaup?
When it does not snow in Lilliwaup?
How many hours of daylight does Lilliwaup have in September?
What time are sunrise and sunset in September in Lilliwaup?
How long on average sun shines in September in Lilliwaup?
How high is the UV index in September in Lilliwaup?
Average temperature in September
Lilliwaup, WA
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is December (41.5°F).
- Average low temperature in September: 47.5°F
The month with the highest average low temperature is August (50.4°F).
The coldest month (with the lowest average low temperature) is February (32.7°F).
Average pressure in September
Lilliwaup, WA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).
Average wind speed in September
Lilliwaup, WA
- Average wind speed in September: 3.4mph
The windiest month (with the highest average wind speed) is March (4.3mph).
The calmest month (with the lowest average wind speed) is September (3.4mph).
Average humidity in September
Lilliwaup, WA
- Average humidity in September: 78%
The months with the highest relative humidity are November and December (90%).
The month with the lowest relative humidity is July (72%).
Average rainfall in September
Lilliwaup, WA
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is January (7.24").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in September
Lilliwaup, WA
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is March (21.4 days).
The month with the least rainy days is August (6.3 days).
Average snowfall in September
Lilliwaup, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Lilliwaup, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.3 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
Lilliwaup, 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 0min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in September
Lilliwaup, WA
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is July (21.7 days).
The month with the least sunshine days is March (7.5 days).
Average UV index in September
Lilliwaup, 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, November and December (UV index 2).
Average cloud cover in September
Lilliwaup, WA
- Average cloud cover in September: 39
The months with the most cloud cover are January and December (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in September
Lilliwaup, 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, February, March, April, May, October, November and December (4mi).
Lilliwaup, Washington, USA
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