San Diego vs Costa Mesa Climate
99%matchSan Diego vs Costa Mesa: a 99% climate match. Very close: temperatures within 3°F (2°C), with similar rain, humidity and sun.
San Diego gets 10 in (254 mm) of rain a year and Costa Mesa 11 in (278 mm). September is the warmest month in both, with highs of 81°F (27°C) in San Diego and 77°F (25°C) in Costa Mesa.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
San DiegoCosta Mesasolid = high, dashed = low
Rain (in per month)
San DiegoCosta Mesa
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| San Diego | Costa Mesa | San Diego | Costa Mesa | San Diego | Costa Mesa | |
| Jan | 69°F(20°C) | 67°F(19°C) | 48°F(9°C) | 47°F(9°C) | 1.8 in(46 mm) | 2.3 in(58 mm) |
| Feb | 68°F(20°C) | 66°F(19°C) | 49°F(9°C) | 49°F(9°C) | 2.2 in(56 mm) | 2.7 in(68 mm) |
| Mar | 69°F(21°C) | 67°F(19°C) | 51°F(11°C) | 50°F(10°C) | 1.6 in(41 mm) | 1.7 in(42 mm) |
| Apr | 72°F(22°C) | 69°F(21°C) | 53°F(12°C) | 52°F(11°C) | 0.8 in(21 mm) | 0.7 in(17 mm) |
| May | 73°F(23°C) | 70°F(21°C) | 58°F(14°C) | 56°F(14°C) | 0.2 in(6 mm) | 0.2 in(5 mm) |
| Jun | 75°F(24°C) | 72°F(22°C) | 61°F(16°C) | 60°F(16°C) | 0.1 in(2 mm) | 0.1 in(2 mm) |
| Jul | 78°F(26°C) | 75°F(24°C) | 64°F(18°C) | 63°F(17°C) | 0.1 in(2 mm) | 0.0 in(1 mm) |
| Aug | 80°F(27°C) | 77°F(25°C) | 65°F(19°C) | 64°F(18°C) | 0.0 in(1 mm) | 0.0 in(1 mm) |
| Sep | 81°F(27°C) | 77°F(25°C) | 64°F(18°C) | 62°F(17°C) | 0.1 in(3 mm) | 0.2 in(4 mm) |
| Oct | 78°F(26°C) | 75°F(24°C) | 59°F(15°C) | 58°F(14°C) | 0.4 in(11 mm) | 0.4 in(10 mm) |
| Nov | 74°F(23°C) | 71°F(22°C) | 52°F(11°C) | 51°F(11°C) | 0.9 in(24 mm) | 0.8 in(21 mm) |
| Dec | 69°F(20°C) | 66°F(19°C) | 47°F(9°C) | 47°F(8°C) | 1.6 in(41 mm) | 1.9 in(49 mm) |
1991–2020 averages, by calendar month.