September weather forecastBen Lomond, CA
September
Weather in September
September, the first month of the autumn in Ben Lomond, is still a pleasant month, with an average temperature fluctuating between 72.5°F (22.5°C) and 56.3°F (13.5°C).Temperature
As Ben Lomond transitions into September, the average high-temperature stands at a still pleasant 72.5°F (22.5°C), offering little variation from the preceding month. The nighttime temperature, during September, averages of 56.3°F (13.5°C).Humidity
In Ben Lomond, the average relative humidity in September is 71%.Rainfall
In September, the rain falls for 3.2 days. Throughout September, 0.16" (4mm) of precipitation is accumulated. Throughout the year, there are 74.2 rainfall days, and 13.82" (351mm) of precipitation is accumulated.Daylight
In Ben Lomond, the average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:36 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:52 pm PDT.
Sunshine
In Ben Lomond, California, the average sunshine in September is 11h.UV index
June through September, with an average maximum UV index of 5, are months with the highest UV index. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 5 in September translates into this advice:
Take necessary precautions - Suggestions to elude sunburn are provided. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ben Lomond, CA
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is August (72.9°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is September (56.3°F).
The coldest month (with the lowest average low temperature) is February (46.4°F).
Average pressure in September
Ben Lomond, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in September
Ben Lomond, CA
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in September
Ben Lomond, CA
- Average humidity in September: 71%
The month with the highest relative humidity is March (76%).
The months with the lowest relative humidity are October and November (69%).
Average rainfall in September
Ben Lomond, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is February (2.64").
The driest month (with the least rainfall) is July (0.04").
Average rainfall days in September
Ben Lomond, CA
- Average rainfall days in September: 3.2 days
The month with the highest number of rainy days is March (13.3 days).
The months with the least rainy days are June and August (1.4 days).
Average daylight in September /
Average sunshine in September
Ben Lomond, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 11h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
Ben Lomond, CA
- Average sunshine days in September: 24.3 days
The month with the most sunshine days is June (27.3 days).
The month with the least sunshine days is March (16.6 days).
Average UV index in September
Ben Lomond, 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 February, November and December (UV index 3).
Average cloud cover in September
Ben Lomond, CA
- Average cloud cover in September: 12
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in September
Ben Lomond, 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).
