San Diego weather in March
March is a fair month to visit San Diego: highs of 19°C (66°F) and about 29 mm (1.1 in) of rain on average. Nights average 9°C (48°F) and cloud cover 60% (NASA POWER, 2001–2025 averages). The sea averages 16°C (61°F). It is the 4th wettest month of the year and the 4th coolest. Compared with February, it is warmer and drier; April brings highs of 20°C (68°F) and 17 mm (0.7 in) of rain.
Is March a good time to visit San Diego?
fair month Weather score 80/100.
March is a fair month in San Diego. The weather is usually best in Apr–May, Jul–Nov.
Does it rain a lot in San Diego in March?
No, it is usually dry: about 29 mm (1.1 in) falls in an average March. It is the 4th wettest month of the year.
How warm is San Diego in March?
Days average 19°C (66°F) and nights 9°C (48°F).
San Diego weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | 17°C (63°F) | 8°C (46°F) | 41 mm | 50% | 15°C (58°F) | least pleasant |
| February | 17°C (63°F) | 8°C (46°F) | 55 mm | 56% | 15°C (60°F) | least pleasant |
| March | 19°C (66°F) | 9°C (48°F) | 29 mm | 60% | 16°C (61°F) | fair |
| April | 20°C (68°F) | 10°C (49°F) | 17 mm | 60% | 17°C (62°F) | best |
| May | 22°C (72°F) | 11°C (52°F) | 7 mm | 72% | 18°C (65°F) | best |
| June | 25°C (78°F) | 13°C (55°F) | 14 mm | 81% | 20°C (68°F) | fair |
| July | 29°C (84°F) | 16°C (61°F) | 4 mm | 75% | 21°C (71°F) | best |
| August | 29°C (85°F) | 17°C (62°F) | 4 mm | 69% | 22°C (71°F) | best |
| September | 28°C (83°F) | 17°C (62°F) | 6 mm | 59% | 21°C (70°F) | best |
| October | 25°C (76°F) | 14°C (57°F) | 15 mm | 54% | 19°C (65°F) | best |
| November | 21°C (69°F) | 11°C (51°F) | 25 mm | 50% | 17°C (63°F) | best |
| December | 17°C (62°F) | 8°C (46°F) | 51 mm | 51% | 16°C (61°F) | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated . How we rate months