September weather forecastValley Ford, CA
September
Weather in September
September, the first month of the autumn in Valley Ford, is still a pleasant month, with an average temperature fluctuating between 54.7°F (12.6°C) and 72.5°F (22.5°C).Temperature
September registers as the month with the highest average temperatures, reaching 72.5°F (22.5°C) at its peak and 54.7°F (12.6°C) at the lowest.Humidity
The months with the lowest humidity are September and October, with an average relative humidity of 71%.Rainfall
In September, the rain falls for 2.7 days. Throughout September, 0.12" (3mm) of precipitation is accumulated. Throughout the year, there are 83.1 rainfall days, and 20" (508mm) of precipitation is accumulated.Daylight
The average length of the day in September in Valley Ford is 12h and 25min.On the first day of September, sunrise is at 6:41 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:55 pm PDT.
Sunshine
The average sunshine in September is 10.8h.UV index
June through September, with an average maximum UV index of 5, are months with the highest UV index in Valley Ford. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 5 during September leads to these instructions:
Ensure safety - Sun damage prevention is strongly urged. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Valley Ford, CA
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is September (72.5°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in September: 54.7°F
The month with the highest average low temperature is August (54.9°F).
The coldest month (with the lowest average low temperature) is December (45.3°F).
Average pressure in September
Valley Ford, 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 August and September (29.92"Hg).
Average wind speed in September
Valley Ford, CA
- Average wind speed in September: 7.4mph
The windiest month (with the highest average wind speed) is May (9.9mph).
The calmest month (with the lowest average wind speed) is November (6.7mph).
Average humidity in September
Valley Ford, CA
- Average humidity in September: 71%
The month with the highest relative humidity is March (78%).
The months with the lowest relative humidity are September and October (71%).
Average rainfall in September
Valley Ford, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is February (4.37").
The driest month (with the least rainfall) is August (0.04").
Average rainfall days in September
Valley Ford, CA
- Average rainfall days in September: 2.7 days
The month with the highest number of rainy days is March (14.4 days).
The month with the least rainy days is August (1.1 days).
Average daylight in September /
Average sunshine in September
Valley Ford, 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 30min).
- Average sunshine in September: 10h and 48min
The months with the most sunshine are July and August (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Valley Ford, CA
- Average sunshine days in September: 25.9 days
The month with the most sunshine days is August (27.3 days).
The month with the least sunshine days is March (14.8 days).
Average UV index in September
Valley Ford, CA
- Average UV index in September: 5
The months with the highest UV index are 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
Valley Ford, CA
- Average cloud cover in September: 12
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 12).
Average visibility in September
Valley Ford, 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).
