September weather forecastEl Cerrito, CA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in El Cerrito, California, with an average temperature fluctuating between 56.5°F (13.6°C) and 75.7°F (24.3°C).Temperature
September temperatures tend to peak at an average high of 75.7°F (24.3°C) and dip to a low of 56.5°F (13.6°C).Humidity
In El Cerrito, the average relative humidity in September is 66%.Rainfall
The months with the least rainfall in El Cerrito, California, are June through September Rain falls for 2.5 days and accumulates 0.08" (2mm) of rain.Daylight
The average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:39 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:53 pm PDT.
Sunshine
In El Cerrito, the average sunshine in September is 10.8h.UV index
The months with the highest UV index are April through September, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 5 during September leads to these advisories:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
El Cerrito, CA
- Average high temperature in September: 75.7°F
The warmest month (with the highest average high temperature) is September (75.7°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is September (56.5°F).
The coldest month (with the lowest average low temperature) is January (44.8°F).
Average pressure in September
El Cerrito, 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
El Cerrito, CA
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is May (7.5mph).
The calmest month (with the lowest average wind speed) is November (5.1mph).
Average humidity in September
El Cerrito, CA
- Average humidity in September: 66%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (65%).
Average rainfall in September
El Cerrito, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is February (1.38").
The driest months (with the least rainfall) are June, July, August and September (0.08").
Average rainfall days in September
El Cerrito, CA
- Average rainfall days in September: 2.5 days
The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is June (2 days).
Average daylight in September /
Average sunshine in September
El Cerrito, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 10h and 48min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
El Cerrito, CA
- Average sunshine days in September: 24.5 days
The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is March (18.4 days).
Average UV index in September
El Cerrito, CA
- Average UV index in September: 5
The months with the highest UV index are April, May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
El Cerrito, CA
- Average cloud cover in September: 15
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 14).
Average visibility in September
El Cerrito, 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).
