United States · 30-year monthly climate averages
Based on 30 years of climate data, the most comfortable months to visit San Diego are June, July and October, when daytime temperatures are agreeable and rainfall is relatively low.
San Diego sees its warmest weather in August, when daytime highs average around 25°C, and its coolest in December (around 19°C).
Annual precipitation totals roughly 249mm — February is typically the wettest month (~56mm) and August the driest (~0mm).
Rainfall is spread fairly evenly through the year, so no single season is dramatically wetter than the rest.
🟧 avg daytime high · 🟦 dashed: avg nighttime low · bars: monthly rainfall
Daily forecast highs vs the 30-year normal — last 60 days
Each bar is one day: orange above normal, blue below.
| Month | High / Low | Rainfall | Travel rating |
|---|---|---|---|
| January | 19° / 10°C | 50mm | 🌟 Great |
| February | 19° / 11°C | 56mm | 🌟 Great |
| March | 19° / 13°C | 37mm | 🌟 Great |
| April | 20° / 14°C | 17mm | 🌟 Great |
| May | 21° / 16°C | 7mm | 🌟 Great |
| June | 22° / 17°C | 1mm | 🌟 Great |
| July | 24° / 19°C | 2mm | 🌟 Great |
| August | 25° / 20°C | 0mm | 🌟 Great |
| September | 25° / 19°C | 3mm | 🌟 Great |
| October | 24° / 16°C | 13mm | 🌟 Great |
| November | 22° / 13°C | 20mm | 🌟 Great |
| December | 19° / 10°C | 43mm | 🌟 Great |
January in San Diego is pleasantly warm, with average daytime highs around 19°C (66°F) and nighttime lows near 10°C (50°F). Expect roughly 50mm of precipitation spread over about 5 rainy days, with little rainfall.
🎒 What to pack — light layers · comfortable walking shoes
February in San Diego is pleasantly warm, with average daytime highs around 19°C (66°F) and nighttime lows near 11°C (52°F). Expect roughly 56mm of precipitation spread over about 6 rainy days, with little rainfall.
🎒 What to pack — light layers · comfortable walking shoes
March in San Diego is pleasantly warm, with average daytime highs around 19°C (67°F) and nighttime lows near 13°C (55°F). Expect roughly 37mm of precipitation spread over about 5 rainy days, with little rainfall.
🎒 What to pack — light layers · comfortable walking shoes
April in San Diego is pleasantly warm, with average daytime highs around 20°C (69°F) and nighttime lows near 14°C (57°F). Expect roughly 17mm of precipitation spread over about 3 rainy days, and rain is rare.
🎒 What to pack — light layers · comfortable walking shoes
May in San Diego is pleasantly warm, with average daytime highs around 21°C (70°F) and nighttime lows near 16°C (60°F). Expect roughly 7mm of precipitation spread over about 1 rainy days, and rain is rare.
🎒 What to pack — light layers · comfortable walking shoes
June in San Diego is pleasantly warm, with average daytime highs around 22°C (72°F) and nighttime lows near 17°C (63°F). Expect roughly 1mm of precipitation spread over about 0 rainy days, and rain is rare.
🎒 What to pack — light layers · comfortable walking shoes
July in San Diego is pleasantly warm, with average daytime highs around 24°C (75°F) and nighttime lows near 19°C (66°F). Expect roughly 2mm of precipitation spread over about 0 rainy days, and rain is rare.
🎒 What to pack — light layers · comfortable walking shoes
August in San Diego is warm, with average daytime highs around 25°C (77°F) and nighttime lows near 20°C (67°F). Expect roughly 0mm of precipitation spread over about 0 rainy days, and rain is rare.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
September in San Diego is warm, with average daytime highs around 25°C (77°F) and nighttime lows near 19°C (66°F). Expect roughly 3mm of precipitation spread over about 1 rainy days, and rain is rare.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
October in San Diego is pleasantly warm, with average daytime highs around 24°C (75°F) and nighttime lows near 16°C (62°F). Expect roughly 13mm of precipitation spread over about 2 rainy days, and rain is rare.
🎒 What to pack — light layers · comfortable walking shoes
November in San Diego is pleasantly warm, with average daytime highs around 22°C (71°F) and nighttime lows near 13°C (55°F). Expect roughly 20mm of precipitation spread over about 3 rainy days, with little rainfall.
🎒 What to pack — light layers · comfortable walking shoes
December in San Diego is mild, with average daytime highs around 19°C (66°F) and nighttime lows near 10°C (50°F). Expect roughly 43mm of precipitation spread over about 4 rainy days, with little rainfall.
🎒 What to pack — light jacket · layers for cool evenings