September weather forecastSan Antonio, Chile
September
Weather in September
The arrival of spring in San Antonio, Chile comes with longer days and warmer temperatures in September. Changes in climate become beneficial to vegetation, with flowers beginning to bloom and trees donning fresh leaves. Interestingly, September represents a decrease in rainfall with 15mm (0.59") falling typically over 3.7 days. This month lays claim to gradually longer daylight hours compared to the previous ones. The mild temperatures prevalent in September fluctuate from 9°C (48.2°F) to 16°C (60.8°F).Temperature
A minimal variation is noted in San Antonio's average high-temperature at the onset of September, reaching an enjoyable 16°C (60.8°F) from August's 15.2°C (59.4°F). Throughout the nights in September, an average low-temperature of 9°C (48.2°F) is noted in San Antonio.Humidity
August and September, with an average relative humidity of 76%, are the most humid months in San Antonio.Rainfall
In San Antonio, in September, it is raining for 3.7 days, with typically 15mm (0.59") of accumulated precipitation. Throughout the year, in San Antonio, Chile, there are 40.9 rainfall days, and 190mm (7.48") of precipitation is accumulated.Daylight
In San Antonio, the average length of the day in September is 11h and 54min.On the first day of the month, sunrise is at 07:03 and sunset at 18:29 -04. On the last day of September, sunrise is at 07:23 and sunset at 19:48 -03.
Note: On Sunday, 08. September 2024, at 00:00, Daylight Saving Time starts, and the time zone changes from -04 to -03. Daylight Saving Time lasts until Sunday, 06. April 2025, at 00:00; consequently, the time zone reverts from -03 to -04.
Sunshine
In September, the average sunshine is 8.7h.UV index
The months with the lowest UV index are May through October, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 4 in September translates into this advice:
Exercise prevention - Precautions against solar damage are endorsed. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
San Antonio, Chile
- Average high temperature in September: 16°C
The warmest month (with the highest average high temperature) is February (21.7°C).
The month with the lowest average high temperature is July (14.4°C).
- Average low temperature in September: 9°C
The months with the highest average low temperature are January and February (14.8°C).
The coldest month (with the lowest average low temperature) is July (8.8°C).
Average pressure in September
San Antonio, Chile
- Average pressure in September: 1019.2mbar
The month with the highest atmospheric pressure is July (1019.6mbar).
The month with the lowest atmospheric pressure is February (1014.3mbar).
Average wind speed in September
San Antonio, Chile
- Average wind speed in September: 13.7km/h
The windiest month (with the highest average wind speed) is November (15.3km/h).
The calmest month (with the lowest average wind speed) is May (12km/h).
Average humidity in September
San Antonio, Chile
- Average humidity in September: 76%
The months with the highest relative humidity are August and September (76%).
The month with the lowest relative humidity is April (71%).
Average rainfall in September
San Antonio, Chile
- Average rainfall in September: 15mm
The wettest month (with the highest rainfall) is June (74mm).
The driest months (with the least rainfall) are January, February, March and November (1mm).
Average rainfall days in September
San Antonio, Chile
- Average rainfall days in September: 3.7 days
The month with the highest number of rainy days is June (7.3 days).
The month with the least rainy days is February (0.5 days).
Average daylight in September /
Average sunshine in September
San Antonio, Chile
- Average daylight in September: 11h and 54min
The month with the longest days is December (Average daylight: 14h and 18min).
The month with the shortest days is June (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is February (Average sunshine: 9h and 54min).
The month with the least sunshine is June (Average sunshine: 8h and 6min).
Average sunshine days in September
San Antonio, Chile
- Average sunshine days in September: 24 days
The month with the most sunshine days is January (28.8 days).
The month with the least sunshine days is June (21.9 days).
Average UV index in September
San Antonio, Chile
- Average UV index in September: 4
The months with the highest UV index are January, February, March, April, November and December (UV index 5).
The months with the lowest UV index are May, June, July, August, September and October (UV index 4).
Average cloud cover in September
San Antonio, Chile
- Average cloud cover in September: 25
The months with the most cloud cover are June and August (Cloud cover 28).
The month with the least cloud cover is February (Cloud cover 9).
Average visibility in September
San Antonio, Chile
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
