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
September indicates a minor shift in the average high-temperature, from August's pleasant 71.1°F (21.7°C) to a refreshing 65.3°F (18.5°C). In September, Clipper experiences a temperature dip to an average of 49.5°F (9.7°C) at night.Humidity
The average relative humidity in September is 79%.Rainfall
In Clipper, during September, the rain falls for 5.8 days and regularly aggregates up to 0.35" (9mm) of precipitation. In Clipper, during the entire year, the rain falls for 104.5 days and collects up to 7.01" (178mm) of precipitation.Snowfall
In Clipper, snow does not fall in May through October.Daylight
In Clipper, the average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 6:27 am and sunset at 7:50 pm. On the last day of September, sunrise is at 7:08 am and sunset at 6:48 pm PDT.
Sunshine
The average sunshine in September is 9.2h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum UV index of 3 in September translates into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Clipper have in September?
When are sunrise and sunset in September in Clipper?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Clipper, WA
- Average high temperature in September: 65.3°F
The warmest month (with the highest average high temperature) is August (71.1°F).
The month with the lowest average high temperature is December (41.7°F).
- Average low temperature in September: 49.5°F
The month with the highest average low temperature is August (52.7°F).
The coldest months (with the lowest average low temperature) are February and December (34.3°F).
Average pressure in September
Clipper, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).
Average wind speed in September
Clipper, WA
- Average wind speed in September: 3.8mph
The windiest months (with the highest average wind speed) are November and December (5.8mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in September
Clipper, WA
- Average humidity in September: 79%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is July (74%).
Average rainfall in September
Clipper, WA
- Average rainfall in September: 0.35"
The wettest month (with the highest rainfall) is January (1.1").
The driest months (with the least rainfall) are July and August (0.2").
Average rainfall days in September
Clipper, WA
- Average rainfall days in September: 5.8 days
The month with the highest number of rainy days is November (13.6 days).
The month with the least rainy days is August (3.1 days).
Average snowfall in September
Clipper, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.63").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Clipper, 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
Clipper, 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 1min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are January and December (Average sunshine: 4h and 12min).
Average sunshine days in September
Clipper, WA
- Average sunshine days in September: 19.4 days
The month with the most sunshine days is August (24.9 days).
The month with the least sunshine days is November (11.3 days).
Average UV index in September
Clipper, WA
- Average UV index in September: 3
The month with the highest UV index is 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
Clipper, WA
- Average cloud cover in September: 34
The months with the most cloud cover are January, February, March and December (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 26).
Average visibility in September
Clipper, WA
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and March (5mi).
Clipper, Washington, USA
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