San Antonio Weather: September
 |
Average Day Temperature: | 58.6°F |
|
Average Night Temperature: | 49.6°F |
|
Sea Water Temperature: | 54.8°F |
|
Number of Sunny Days: | 19 days |
| Sunshine Hours: | 11.4 - 12.4 hours | |
|
Number of Rainy Days: | 0 days |
| Precipitation Totals: | 0.2 in | |
| detailed information | ||
forecast
| San Antonio |
Temperature
| San Antonio |
Air Temperature in September, °F
| Day Temperature | Night Temperature |
The highest day temperature in September 2025 was 65°F. The lowest night temperature was 44°F. The average values for day and night temperatures during September were 58.4°F и 49.4°F respectivly.
San Antonio Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for San Antonio was 55.8°F. The maximum and minimum values were 54.4°F and 56.8°F respectively.
| Sunny days | |
| Cloudy days | |
| Gloomy days |
Most of the days in September are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in September, in
Precipitation total in September for San Antonio is 0.2 in.
The average wind speed in September is 8.4 mph. This value is relatively stable throughout the year.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for San Antonio in September is 8.9 hours.
San Antonio on the Weather Map
| Algarrobo |  |
+52 |
| Antofagasta | |
+54 |
| Arica | |
+62 |
| Chiloe |  |
+48 |
| Concepcion |  |
+54 |
| Concon | |
+52 |
| Easter Island |  |
+72 |
| Iquique | |
+58 |
| La Serena | |
+58 |
| Puerto Montt | |
+50 |
| Puerto Natales | |
+36 |
| Punta Arenas | |
+36 |
| Torres del Paine |  |
+28 |
| Valparaiso | |
+52 |
| Vina del Mar | |
+52 |
| 2100 |  |
52°F | N 6 mph |
| 0000 |  |
54°F | N 7 mph |
| 0300 | |
52°F | N 7 mph |
| 0600 | |
52°F | N 6 mph |
| 0900 |  |
60°F | NE 7 mph |
| 1200 | |
62°F | NE 13 mph |
| 1500 | |
60°F | NE 12 mph |
| 1800 | |
56°F | N 11 mph |