Costa Mesa vs National City Climate
97%matchOn climate, National City is a 97% match for Costa Mesa. Compared with Costa Mesa, National City has the same winter lows and 4°F (2°C) hotter summer days.
Costa Mesa gets 11 in (278 mm) of rain a year and National City 9.2 in (233 mm). September is the warmest month in both, with highs of 77°F (25°C) in Costa Mesa and 82°F (28°C) in National City.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
Costa MesaNational Citysolid = high, dashed = low
Rain (in per month)
Costa MesaNational City
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| Costa Mesa | National City | Costa Mesa | National City | Costa Mesa | National City | |
| Jan | 67°F(19°C) | 69°F(21°C) | 47°F(9°C) | 48°F(9°C) | 2.3 in(58 mm) | 1.7 in(42 mm) |
| Feb | 66°F(19°C) | 69°F(21°C) | 49°F(9°C) | 49°F(9°C) | 2.7 in(68 mm) | 2.0 in(52 mm) |
| Mar | 67°F(19°C) | 70°F(21°C) | 50°F(10°C) | 51°F(11°C) | 1.7 in(42 mm) | 1.5 in(38 mm) |
| Apr | 69°F(21°C) | 73°F(23°C) | 52°F(11°C) | 54°F(12°C) | 0.7 in(17 mm) | 0.7 in(18 mm) |
| May | 70°F(21°C) | 73°F(23°C) | 56°F(14°C) | 58°F(15°C) | 0.2 in(5 mm) | 0.2 in(5 mm) |
| Jun | 72°F(22°C) | 76°F(24°C) | 60°F(16°C) | 61°F(16°C) | 0.1 in(2 mm) | 0.1 in(2 mm) |
| Jul | 75°F(24°C) | 80°F(26°C) | 63°F(17°C) | 64°F(18°C) | 0.0 in(1 mm) | 0.1 in(2 mm) |
| Aug | 77°F(25°C) | 82°F(28°C) | 64°F(18°C) | 66°F(19°C) | 0.0 in(1 mm) | 0.0 in(1 mm) |
| Sep | 77°F(25°C) | 82°F(28°C) | 62°F(17°C) | 64°F(18°C) | 0.2 in(4 mm) | 0.1 in(3 mm) |
| Oct | 75°F(24°C) | 79°F(26°C) | 58°F(14°C) | 59°F(15°C) | 0.4 in(10 mm) | 0.4 in(10 mm) |
| Nov | 71°F(22°C) | 75°F(24°C) | 51°F(11°C) | 52°F(11°C) | 0.8 in(21 mm) | 0.9 in(22 mm) |
| Dec | 66°F(19°C) | 69°F(21°C) | 47°F(8°C) | 47°F(8°C) | 1.9 in(49 mm) | 1.5 in(38 mm) |
1991–2020 averages, by calendar month.