San Marcos, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Marcos, a city in San Diego County, California.
This Afternoon
76°F
Sunny
Sunny, with a high near 76. West wind around 10 mph.
7-day forecast for San Marcos
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Sunny | 10 mph W | 0% |
| Tonight | 61°F | Partly Cloudy | 0 to 5 mph S | 1% |
| Saturday | 78°F | Sunny | 0 to 10 mph NW | 1% |
| Saturday Night | 62°F | Partly Cloudy | 0 to 5 mph E | 0% |
| Sunday | 77°F | Partly Sunny | 0 to 10 mph SE | 0% |
| Sunday Night | 63°F | Mostly Cloudy | 0 to 5 mph SW | 2% |
| Monday | 76°F | Mostly Sunny | 0 to 10 mph S | 0% |
| Monday Night | 61°F | Mostly Clear | 0 to 10 mph E | 1% |
| Tuesday | 77°F | Sunny | 5 to 10 mph W | 0% |
| Tuesday Night | 63°F | Mostly Clear | 0 to 10 mph NW | 0% |
| Wednesday | 83°F | Sunny | 0 to 10 mph N | 2% |
| Wednesday Night | 65°F | Mostly Clear | 0 to 5 mph NW | 2% |
| Thursday | 84°F | Sunny | 0 to 10 mph W | 2% |
| Thursday Night | 67°F | Partly Cloudy | 0 to 5 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov) for San Marcos (33.133, -117.170). Updated through the day.
Growing snapshot for San Marcos
Last spring frost
Jan 2
First fall frost
Dec 30
Growing season
365 days
Hardiness zone
10a
More local growing data for San Marcos: nearby ZIP 92096 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Alpine
Bonita
Bonsall
Borrego Springs
Bostonia
Boulevard
Camp Pendleton Mainside
Camp Pendleton South
Campo
Carlsbad
Casa de Oro-Mount Helix
Chula Vista
Coronado
Crest
Del Dios
Del Mar
Descanso
El Cajon
Elfin Forest
Encinitas
Escondido
Eucalyptus Hills
Fairbanks Ranch
Fallbrook
Granite Hills
Harbison Canyon
Harmony Grove
Hidden Meadows
Imperial Beach
Jacumba
Climate data from the nearest NOAA station, Escondido #2, Ca (3.9 mi from San Marcos). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.