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
Transition into September subtly marks a drop in the average high-temperature, moderately moving from 83.7°F (28.7°C) in August to a still moderately hot 77.7°F (25.4°C). September nights are characterized by a notable drop from daytime highs, with an average low-temperature of 48.4°F (9.1°C).Humidity
In Quincy, the average relative humidity in September is 45%.Rainfall
In September, the rain falls for 3.3 days. Throughout September, 0.43" (11mm) of precipitation is accumulated. In Quincy, during the entire year, the rain falls for 71.8 days and collects up to 39.29" (998mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows in Quincy. Throughout September, in the average 0.3 snowfall days, it receives 0.35" (9mm) of snow. Throughout the year, there are 64 snowfall days, and 184.53" (4687mm) of snow is accumulated.Daylight
In Quincy, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:32 am and sunset at 7:34 pm. On the last day of September, sunrise is at 6:59 am and sunset at 6:47 pm PDT.
Sunshine
In September, the average sunshine is 11.2h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: In September, an average UV index of 4 transforms into the following instructions:
Take necessary precautions - Protection from skin and eye injury is mandatory. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How many days does it rain in September in Quincy?
When does it start to snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Quincy have in September?
What is the UV index reading in September?
Average temperature in September
Quincy, CA
- Average high temperature in September: 77.7°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in September: 48.4°F
The month with the highest average low temperature is July (52.9°F).
The coldest month (with the lowest average low temperature) is December (27.7°F).
Average pressure in September
Quincy, CA
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Quincy, CA
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is February (6.4mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Quincy, CA
- Average humidity in September: 45%
The month with the highest relative humidity is March (80%).
The month with the lowest relative humidity is July (40%).
Average rainfall in September
Quincy, CA
- Average rainfall in September: 0.43"
The wettest month (with the highest rainfall) is March (7.56").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in September
Quincy, CA
- Average rainfall days in September: 3.3 days
The month with the highest number of rainy days is May (10.6 days).
The month with the least rainy days is August (2.2 days).
Average snowfall in September
Quincy, CA
- Average snowfall in September: 0.35"
The month with the highest snowfall is March (43.23").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Quincy, CA
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is March (13.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Quincy, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Quincy, CA
- Average sunshine days in September: 25.9 days
The month with the most sunshine days is August (27.9 days).
The month with the least sunshine days is March (13.4 days).
Average UV index in September
Quincy, CA
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Quincy, CA
- Average cloud cover in September: 10
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility in September
Quincy, CA
- Average visibility in September: 6mi
The months with the highest visibility are February, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, March and December (5mi).
Quincy, California, USA
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