San Diego Weather: September
 |
Average Day Temperature: | 89.3°F |
|
Average Night Temperature: | 80.6°F |
|
Sea Water Temperature: | 88.8°F |
|
Number of Sunny Days: | 2 days |
| Sunshine Hours: | 12.0 - 12.3 hours | |
|
Number of Rainy Days: | 10 days |
| Precipitation Totals: | 4.5 in | |
| detailed information | ||
forecast
| San Diego |
Temperature
| San Diego |
Air Temperature in September, °F
The highest day temperature in September 2025 was 98°F. The lowest night temperature was 78°F. The average values for day and night temperatures during September were 91.2°F и 80.5°F respectivly.
San Diego Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for San Diego was 88.7°F. The maximum and minimum values were 87.8°F and 89.8°F respectively.
Most of the days in September are gloomy but you can also expect sunny days.
Precipitation Totals in September, in
Precipitation total in September for San Diego is 4.5 in. It makes september one of the most rainy months of the year.
The average wind speed in September is 6.1 mph. It makes September one of the most windless months of the year for San Diego.
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 Diego in September is 4.7 hours.
San Diego on the Weather Map
| Apoyo Lake |  |
+72 |
| Ciudad Sandino | |
+72 |
| Corn Islands |  |
+84 |
| El Transito | |
+80 |
| Granada |  |
+76 |
| Isla de Ometepe |  |
+80 |
| Las Salinas | |
+80 |
| Leon | |
+76 |
| Managua | |
+72 |
| Masachapa | |
+80 |
| Masaya | |
+74 |
| Pochomil | |
+80 |
| San Diego | |
+80 |
| San Juan del Sur | |
+80 |
| Somoto | |
+62 |
| 0300 |  |
80°F | W 12 mph |
| 0600 |  |
78°F | W 9 mph |
| 0900 | |
86°F | W 11 mph |
| 1200 |  |
92°F | W 9 mph |
| 1500 | |
92°F | W 9 mph |
| 1800 |  |
84°F | W 8 mph |
| 2100 | |
82°F | W 11 mph |
| 0000 | |
82°F | W 9 mph |