National City Climate by Month
National City, California, United States
Warm summers and mild winters, with little rain, mostly from December to March.
National City has warm summers and mild winters, with little rain, mostly from December to March. Afternoon highs range from 69°F (21°C) in February to 82°F (28°C) in September, and December nights average 47°F (8°C). It gets only 9.2 in (233 mm) of rain a year. May to September are almost completely dry.
- Warmest month
- 82°F(28°C)
- Average high, September
- Coldest nights
- 47°F(8°C)
- Average low, December
- Rain per year
- 9.2 in(233 mm)
- Wettest: February
- Humidity
- 60%
- Sunniest: June
Best and worst months in National City
Best for weatherMay, June and November are the best time for weather in National City: highs near 75°F (24°C) and almost no rain.
Least pleasantJanuary and February are the least pleasant; February is the coldest, with highs of only 69°F (21°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in June.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
National City weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 69°F(21°C) | 48°F(9°C) | 1.7 in(42 mm) | 54% | 3.0 |
| FebFebruary | 69°F(21°C) | 49°F(9°C) | 2.0 in(52 mm) | 59% | 3.5 |
| MarMarch | 70°F(21°C) | 51°F(11°C) | 1.5 in(38 mm) | 61% | 4.9 |
| AprApril | 73°F(23°C) | 54°F(12°C) | 0.7 in(18 mm) | 61% | 6.0 |
| MayMayBest | 73°F(23°C) | 58°F(15°C) | 0.2 in(5 mm) | 60% | 6.3 |
| JunJuneBest | 76°F(24°C) | 61°F(16°C) | 0.1 in(2 mm) | 64% | 6.7 |
| JulJuly | 80°F(26°C) | 64°F(18°C) | 0.1 in(2 mm) | 67% | 6.6 |
| AugAugust | 82°F(28°C) | 66°F(19°C) | 0.0 in(1 mm) | 64% | 6.4 |
| SepSeptember | 82°F(28°C) | 64°F(18°C) | 0.1 in(3 mm) | 62% | 5.5 |
| OctOctober | 79°F(26°C) | 59°F(15°C) | 0.4 in(10 mm) | 58% | 4.2 |
| NovNovemberBest | 75°F(24°C) | 52°F(11°C) | 0.9 in(22 mm) | 51% | 3.4 |
| DecDecember | 69°F(21°C) | 47°F(8°C) | 1.5 in(38 mm) | 55% | 2.8 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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