Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The onset of September marks an average high-temperature of a still agreeable 72.3°F (22.4°C), hardly differing from August's 72.5°F (22.5°C). San Simeon, during September nights, observes an average temperature of 60.1°F (15.6°C).Humidity
In September, the average relative humidity in San Simeon, California, is 65%.Rainfall
In September, the rain falls for 1.6 days. Throughout September, 0.12" (3mm) of precipitation is accumulated. Throughout the year, there are 50 rainfall days, and 7.4" (188mm) of precipitation is accumulated.Daylight
In San Simeon, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:37 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:49 pm PDT.
Sunshine
In September, the average sunshine in San Simeon is 11.4h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The UV index of 5 in September translates into these instructions:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How many days does it rain in September?
How many hours of daylight does San Simeon have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does San Simeon have in September?
How high is the UV index in September?
Average temperature in September
San Simeon, CA
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is August (72.5°F).
The month with the lowest average high temperature is December (58.1°F).
- Average low temperature in September: 60.1°F
The month with the highest average low temperature is September (60.1°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).
Average pressure in September
San Simeon, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in September
San Simeon, CA
- Average wind speed in September: 8.1mph
The windiest month (with the highest average wind speed) is May (10.6mph).
The calmest month (with the lowest average wind speed) is November (7.3mph).
Average humidity in September
San Simeon, CA
- Average humidity in September: 65%
The month with the highest relative humidity is March (72%).
The month with the lowest relative humidity is October (64%).
Average rainfall in September
San Simeon, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is December (1.5").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in September
San Simeon, CA
- Average rainfall days in September: 1.6 days
The month with the highest number of rainy days is March (9 days).
The month with the least rainy days is August (0.5 days).
Average daylight in September /
Average sunshine in September
San Simeon, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 11h and 2min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in September
San Simeon, CA
- Average sunshine days in September: 27.4 days
The month with the most sunshine days is August (29.5 days).
The month with the least sunshine days is February (20.3 days).
Average UV index in September
San Simeon, CA
- Average UV index in September: 5
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January, February, March, April, November and December (UV index 4).
Average cloud cover in September
San Simeon, CA
- Average cloud cover in September: 7
The month with the most cloud cover is March (Cloud cover 28).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in September
San Simeon, 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).
San Simeon, California, USA
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