Lafayette, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lafayette, a city in Contra Costa County, California.
This Afternoon
61°F
Chance Light Rain
A chance of rain. Partly sunny. High near 61, with temperatures falling to around 56 in the afternoon. South wind around 3 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Lafayette
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 61°F | Chance Light Rain | 3 mph S | 43% |
| Tonight | 48°F | Chance Light Rain then Mostly Cloudy | 6 mph ESE | 52% |
| Wednesday | 66°F | Sunny | 6 mph N | 1% |
| Wednesday Night | 48°F | Partly Cloudy | 5 mph WNW | 0% |
| Thursday | 70°F | Patchy Fog then Sunny | 3 mph NNW | 0% |
| Thursday Night | 49°F | Mostly Clear | 2 mph SW | 0% |
| Friday | 72°F | Sunny | 2 mph NNE | 0% |
| Friday Night | 49°F | Clear | 2 mph ENE | 0% |
| Saturday | 75°F | Sunny | 1 to 6 mph NE | 0% |
| Saturday Night | 51°F | Mostly Clear | 2 mph WSW | 0% |
| Sunday | 73°F | Mostly Sunny | 3 mph NW | 0% |
| Sunday Night | 51°F | Partly Cloudy | 2 mph WSW | 0% |
| Monday | 71°F | Partly Sunny | 3 mph SW | 1% |
| Monday Night | 51°F | Partly Cloudy | 3 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Lafayette (37.891, -122.120). Updated through the day.
Growing snapshot for Lafayette
Last spring frost
Jan 7
First fall frost
Dec 19
Growing season
346 days
Hardiness zone
9b
More local growing data for Lafayette: nearby ZIP 94549 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Acalanes Ridge
Alamo
Alhambra Valley
Antioch
Bay Point
Bayview
Benicia
Bethel Island
Blackhawk
Brentwood
Byron
Castle Hill
Clayton
Clyde
Concord
Contra Costa Centre
Crockett
Danville
Diablo
Discovery Bay
East Richmond Heights
El Cerrito
El Sobrante
Hercules
Knightsen
Martinez
Montalvin Manor
Moraga
Mountain View
Norris Canyon
Climate data from the nearest NOAA station, Concord Wwtp, Ca (6.3 mi from Lafayette). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.