September weather forecastYorkville, CA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Yorkville, California, with an average temperature ranging between min 53.2°F (11.8°C) and max 80.1°F (26.7°C).Temperature
Yorkville's shift into September is marked by a subtle change to a still warm 80.1°F (26.7°C) from August's 83.5°F (28.6°C) in temperature. Yorkville experiences a drastic reduction from day temperatures to an average low of 53.2°F (11.8°C) in September.Humidity
The months with the lowest humidity in Yorkville, California, are July and September, with an average relative humidity of 60%.Rainfall
In Yorkville, in September, it is raining for 2.1 days, with typically 0.16" (4mm) of accumulated precipitation. In Yorkville, during the entire year, the rain falls for 83.1 days and collects up to 21.38" (543mm) of precipitation.Snowfall
January, March through December are months without snowfall in Yorkville, California.Daylight
In September, the average length of the day is 12h and 25min.On the first day of the month, sunrise is at 6:42 am and sunset at 7:42 pm. On the last day of September, sunrise is at 7:08 am and sunset at 6:56 pm PDT.
Sunshine
In Yorkville, the average sunshine in September is 10.9h.UV index
In Yorkville, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 5 in September translates into these instructions:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Yorkville, CA
- Average high temperature in September: 80.1°F
The warmest month (with the highest average high temperature) is August (83.5°F).
The month with the lowest average high temperature is December (54.7°F).
- Average low temperature in September: 53.2°F
The month with the highest average low temperature is August (54.1°F).
The coldest month (with the lowest average low temperature) is December (39.9°F).
Average pressure in September
Yorkville, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in September
Yorkville, CA
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is May (6.8mph).
The calmest month (with the lowest average wind speed) is November (4.9mph).
Average humidity in September
Yorkville, CA
- Average humidity in September: 60%
The month with the highest relative humidity is March (78%).
The months with the lowest relative humidity are July and September (60%).
Average rainfall in September
Yorkville, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is February (4.49").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Yorkville, CA
- Average rainfall days in September: 2.1 days
The month with the highest number of rainy days is March (15 days).
The month with the least rainy days is August (0.9 days).
Average snowfall in September
Yorkville, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.2").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Yorkville, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Yorkville, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 10h and 54min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Yorkville, CA
- Average sunshine days in September: 27.1 days
The months with the most sunshine days are July and August (29.6 days).
The month with the least sunshine days is March (14.6 days).
Average UV index in September
Yorkville, CA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover in September
Yorkville, CA
- Average cloud cover in September: 10
The month with the most cloud cover is March (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 6).
Average visibility in September
Yorkville, CA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
