Santa Monica Weather: September
 |
Average Day Temperature: | 81.2°F |
|
Average Night Temperature: | 70.9°F |
|
Sea Water Temperature: | 70.9°F |
|
Number of Sunny Days: | 21 days |
| Sunshine Hours: | 11.9 - 12.9 hours | |
|
Number of Rainy Days: | 0 days |
| Precipitation Totals: | 0.1 in | |
| detailed information | ||
forecast
| Santa Monica |
Temperature
| Santa Monica |
Air Temperature in September, °F
The highest day temperature in September 2025 was 87°F. The lowest night temperature was 64°F. The average values for day and night temperatures during September were 77.8°F и 68.9°F respectivly.
Santa Monica Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for Santa Monica was 72.6°F. The maximum and minimum values were 69.4°F and 75.0°F respectively.
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 Santa Monica is 0.1 in. It makes september one of the least rainy months of the year.
The average wind speed in September is 5.8 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 Santa Monica in September is 9.9 hours.
Santa Monica on the Weather Map
| Boston |  |
+96 |
| Chicago | |
+88 |
| Hawaii |  |
+78 |
| Houston |  |
+90 |
| Las Vegas | |
+96 |
| Los Angeles | |
+82 |
| Maui | |
+72 |
| Miami | |
+100 |
| Myrtle Beach | |
+94 |
| New York | |
+110 |
| San Diego | |
+80 |
| San Francisco | |
+68 |
| Santa Monica | |
+82 |
| Sarasota | |
+100 |
| Tampa | |
+98 |
| 1200 |  |
84°F | NE 6 mph |
| 1500 | |
82°F | NE 10 mph |
| 1800 | |
78°F | NE 9 mph |
| 2100 |  |
74°F | N 7 mph |
| 0000 |  |
78°F | NW 3 mph |
| 0300 | |
76°F | NW 6 mph |
| 0600 | |
76°F | W 4 mph |
| 0900 | |
82°F | N 5 mph |