September weather forecastSouth Yuba City, CA
September
Weather in September
The first month of the autumn, September, is still a tropical month in South Yuba City, California, with an average temperature varying between 60.4°F (15.8°C) and 89.4°F (31.9°C).Temperature
A modest decline in the average high-temperature is seen during September, decreasing from a torrid 95.2°F (35.1°C) in August to a hot 89.4°F (31.9°C). Despite considerable daily temperature swings, a steady low-temperature average of 60.4°F (15.8°C) is noted in South Yuba City throughout September.Humidity
July and September, with an average relative humidity of 38%, are the least humid months.Rainfall
In South Yuba City, during September, the rain falls for 1.9 days and regularly aggregates up to 0.16" (4mm) of precipitation. Throughout the year, in South Yuba City, there are 69.8 rainfall days, and 10.79" (274mm) of precipitation is accumulated.Snowfall
January through November are months without snowfall.Daylight
The average length of the day in September in South Yuba City is 12h and 26min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:36 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:50 pm PDT.
Sunshine
In South Yuba City, the average sunshine in September is 11.2h.UV index
In September, the average daily maximum UV index in South Yuba City, California, is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
South Yuba City, CA
- Average high temperature in September: 89.4°F
The warmest month (with the highest average high temperature) is July (96.4°F).
The month with the lowest average high temperature is December (54.5°F).
- Average low temperature in September: 60.4°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is December (41°F).
Average pressure in September
South Yuba City, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
South Yuba City, CA
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is March (6.1mph).
The calmest month (with the lowest average wind speed) is September (4.7mph).
Average humidity in September
South Yuba City, CA
- Average humidity in September: 38%
The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are July and September (38%).
Average rainfall in September
South Yuba City, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is March (2.17").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
South Yuba City, CA
- Average rainfall days in September: 1.9 days
The month with the highest number of rainy days is March (13.5 days).
The month with the least rainy days is July (0.9 days).
Average snowfall days in September
South Yuba City, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
South Yuba City, 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: 11h and 12min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
South Yuba City, CA
- Average sunshine days in September: 27.4 days
The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is March (16.8 days).
Average UV index in September
South Yuba City, CA
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
South Yuba City, CA
- Average cloud cover in September: 8
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in September
South Yuba City, 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).
