September weather forecastSan Clemente, Mexico
September
Weather in September
September, the first month of the autumn in San Clemente, is still a pleasant month, with temperature in the range of an average low of 12.1°C (53.8°F) and an average high of 21.8°C (71.2°F).Temperature
September's weather displays an average high-temperature of a still pleasant 21.8°C (71.2°F), slightly varied from August's 22.8°C (73°F). San Clemente's nighttime temperature in September drops to an average of 12.1°C (53.8°F).Humidity
September is the most humid month, with an average relative humidity of 78%.Rainfall
In San Clemente, Mexico, in September, during 20.3 rainfall days, 73mm (2.87") of precipitation is typically accumulated. Throughout the year, in San Clemente, there are 139.6 rainfall days, and 468mm (18.43") of precipitation is accumulated.Daylight
The average length of the day in September in San Clemente is 12h and 15min.On the first day of the month, sunrise is at 6:24 am and sunset at 6:55 pm. On the last day of September, sunrise is at 6:31 am and sunset at 6:28 pm CST.
Sunshine
In September, the average sunshine is 8.8h.UV index
In September, the average daily maximum UV index in San Clemente is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: A typical high UV index of 5 in September suggests the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
San Clemente, Mexico
- Average high temperature in September: 21.8°C
The warmest months (with the highest average high temperature) are April and May (26.3°C).
The month with the lowest average high temperature is January (19.5°C).
- Average low temperature in September: 12.1°C
The month with the highest average low temperature is May (13.8°C).
The coldest month (with the lowest average low temperature) is January (7.1°C).
Average pressure in September
San Clemente, Mexico
- Average pressure in September: 1015.7mbar
The month with the highest atmospheric pressure is January (1018.6mbar).
The month with the lowest atmospheric pressure is May (1013.8mbar).
Average wind speed in September
San Clemente, Mexico
- Average wind speed in September: 9.2km/h
The windiest month (with the highest average wind speed) is March (11.2km/h).
The calmest month (with the lowest average wind speed) is July (9km/h).
Average humidity in September
San Clemente, Mexico
- Average humidity in September: 78%
The month with the highest relative humidity is September (78%).
The month with the lowest relative humidity is April (43%).
Average rainfall in September
San Clemente, Mexico
- Average rainfall in September: 73mm
The wettest month (with the highest rainfall) is July (109mm).
The driest month (with the least rainfall) is December (3mm).
Average rainfall days in September
San Clemente, Mexico
- Average rainfall days in September: 20.3 days
The month with the highest number of rainy days is July (24.2 days).
The month with the least rainy days is December (2.7 days).
Average daylight in September /
Average sunshine in September
San Clemente, Mexico
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is November (Average sunshine: 8h and 12min).
Average sunshine days in September
San Clemente, Mexico
- Average sunshine days in September: 6.5 days
The month with the most sunshine days is December (26.3 days).
The month with the least sunshine days is July (3.2 days).
Average UV index in September
San Clemente, Mexico
- Average UV index in September: 5
The month with the highest UV index is April (UV index 6).
The months with the lowest UV index are January, August, October, November and December (UV index 4).
Average cloud cover in September
San Clemente, Mexico
- Average cloud cover in September: 44
The months with the most cloud cover are July and September (Cloud cover 44).
The months with the least cloud cover are March, April and December (Cloud cover 13).
Average visibility in September
San Clemente, Mexico
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May and December (10km).
The months with the lowest visibility are July, August and September (8km).
