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's arrival comes with a decrease in the average high-temperature, moving from a hot 86.2°F (30.1°C) in August to a moderately hot 74.3°F (23.5°C). In Quincy, the September nights cool down to an average low of 53.2°F (11.8°C).Humidity
In Quincy, the average relative humidity in September is 46%.Rainfall
In September, in Quincy, the rain falls for 4.9 days. Throughout September, 0.35" (9mm) of precipitation is accumulated. In Quincy, during the entire year, the rain falls for 100.6 days and collects up to 7.87" (200mm) of precipitation.Snowfall
Months with snowfall are January through April, September, November and December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, there are 25.2 snowfall days, and 12.56" (319mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 32min.On the first day of September, sunrise is at 6:19 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:40 pm PDT.
Sunshine
In September, the average sunshine is 10.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Take precautions - Protection against sun damage is advised. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How much does it rain in September?
When does it start snowing?
How many hours of daylight does Quincy have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Quincy have in September?
What is the UV index intensity in September?
Average temperature in September
Quincy, WA
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is December (33.4°F).
- Average low temperature in September: 53.2°F
The month with the highest average low temperature is August (60.4°F).
The coldest month (with the lowest average low temperature) is December (22.6°F).
Average pressure in September
Quincy, WA
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).
Average wind speed in September
Quincy, WA
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is December (4.5mph).
Average humidity in September
Quincy, WA
- Average humidity in September: 46%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is July (38%).
Average rainfall in September
Quincy, WA
- Average rainfall in September: 0.35"
The wettest month (with the highest rainfall) is December (1.1").
The driest month (with the least rainfall) is August (0.24").
Average rainfall days in September
Quincy, WA
- Average rainfall days in September: 4.9 days
The month with the highest number of rainy days is March (13.1 days).
The month with the least rainy days is July (3.9 days).
Average snowfall in September
Quincy, WA
- Average snowfall in September: 0.08"
The month with the highest snowfall is December (4.45").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in September
Quincy, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is December (8.1 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Quincy, 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 36min).
- Average sunshine in September: 10h and 5min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in September
Quincy, WA
- Average sunshine days in September: 23.6 days
The month with the most sunshine days is July (26 days).
The month with the least sunshine days is February (14.3 days).
Average UV index in September
Quincy, WA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Quincy, WA
- Average cloud cover in September: 17
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility in September
Quincy, WA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Quincy, Washington, USA
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