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 shift into September records an average high-temperature of a still moderately hot 78.3°F (25.7°C), subtly varied from August's 79°F (26.1°C). A noteworthy temperature dip to a refreshing 56.5°F (13.6°C) is observed during the nights of September.Humidity
With an average relative humidity of 62%, September is the least humid month.Rainfall
In San Lorenzo, in September, it is raining for 2.1 days, with typically 0.08" (2mm) of accumulated precipitation. Throughout the year, in San Lorenzo, there are 56.9 rainfall days, and 4.06" (103mm) of precipitation is accumulated.Daylight
The average length of the day in September in San Lorenzo, California, is 12h and 25min.On the first day of September in San Lorenzo, California, sunrise is at 6:39 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:52 pm PDT.
Sunshine
In San Lorenzo, the average sunshine in September is 11.1h.UV index
The average daily maximum UV index in September in San Lorenzo is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: An average UV index of 5 in September transforms into this advice:
Ensure safety - Imperative it is to shield skin and eyes from damage. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Frequently asked questions
What is the average September temperature in San Lorenzo?
What is the least humid month in San Lorenzo?
What is the average humidity in September in San Lorenzo?
How much does it rain in San Lorenzo in September?
What is the average length of the day in September in San Lorenzo?
What time are sunrise and sunset in September in San Lorenzo?
How long on average sun shines in September in San Lorenzo?
How high is the UV index in September in San Lorenzo?
Average temperature in September
San Lorenzo, CA
- Average high temperature in September: 78.3°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is December (56.1°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is September (56.5°F).
The coldest months (with the lowest average low temperature) are January and December (44.1°F).
Average pressure in September
San Lorenzo, 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
San Lorenzo, CA
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is May (6.7mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).
Average humidity in September
San Lorenzo, CA
- Average humidity in September: 62%
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is September (62%).
Average rainfall in September
San Lorenzo, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is February (0.87").
The driest months (with the least rainfall) are June, July and August (0.04").
Average rainfall days in September
San Lorenzo, CA
- Average rainfall days in September: 2.1 days
The month with the highest number of rainy days is March (10.5 days).
The month with the least rainy days is August (0.7 days).
Average daylight in September /
Average sunshine in September
San Lorenzo, CA
- Average daylight in September: 12h and 2min
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 36min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
San Lorenzo, CA
- Average sunshine days in September: 26.9 days
The month with the most sunshine days is July (27.9 days).
The month with the least sunshine days is March (18.6 days).
Average UV index in September
San Lorenzo, CA
- Average UV index in September: 5
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
San Lorenzo, CA
- Average cloud cover in September: 10
The month with the most cloud cover is March (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility in September
San Lorenzo, 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 Lorenzo, California, USA
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