National City, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for National City, a city in San Diego County, California.
Overnight
69°F
Cloudy
Cloudy, with a low around 69. South wind 0 to 5 mph.
7-day forecast for National City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 69°F | Cloudy | 0 to 5 mph S | 0% |
| Tuesday | 75°F | Mostly Sunny | 5 to 10 mph SW | 1% |
| Tuesday Night | 68°F | Mostly Cloudy | 0 to 10 mph W | 1% |
| Wednesday | 75°F | Partly Sunny | 0 to 10 mph SW | 1% |
| Wednesday Night | 69°F | Mostly Cloudy | 0 to 5 mph W | 0% |
| Thursday | 77°F | Mostly Sunny | 0 to 10 mph W | 0% |
| Thursday Night | 70°F | Mostly Cloudy | 0 to 5 mph W | 0% |
| Friday | 78°F | Mostly Sunny | 0 to 10 mph W | 0% |
| Friday Night | 69°F | Partly Cloudy | 0 to 10 mph W | 0% |
| Saturday | 79°F | Mostly Sunny | 0 to 10 mph W | 0% |
| Saturday Night | 70°F | Partly Cloudy | 0 to 10 mph SW | 0% |
| Sunday | 78°F | Mostly Sunny | 0 to 10 mph SW | 1% |
| Sunday Night | 69°F | Partly Cloudy | 0 to 10 mph SW | 2% |
| Monday | 77°F | Mostly Sunny | 0 to 10 mph SW | 6% |
Forecast source: National Weather Service (api.weather.gov) for National City (32.666, -117.097). Updated through the day.
Growing snapshot for National City
Growing season
365 days
Hardiness zone
10b
More local growing data for National City: nearby ZIP 91950 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Chula Vista, Ca (2.1 mi from National City). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.