Lafayette, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lafayette, a city in Contra Costa County, California.
Overnight
58°F
Clear
Clear, with a low around 58. Southwest wind around 6 mph.
7-day forecast for Lafayette
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 58°F | Clear | 6 mph SW | 0% |
| Tuesday | 99°F | Haze then Sunny | 5 to 9 mph WSW | 0% |
| Tuesday Night | 57°F | Mostly Clear | 6 to 9 mph WSW | 0% |
| Wednesday | 92°F | Sunny | 8 mph WSW | 0% |
| Wednesday Night | 58°F | Mostly Clear | 5 to 8 mph WSW | 0% |
| Thursday | 89°F | Sunny | 5 to 8 mph WSW | 0% |
| Thursday Night | 59°F | Mostly Clear | 8 mph WSW | 0% |
| Friday | 94°F | Sunny | 5 to 8 mph WSW | 0% |
| Friday Night | 60°F | Mostly Clear | 9 mph SW | 0% |
| Saturday | 93°F | Sunny | 6 to 9 mph SW | 0% |
| Saturday Night | 62°F | Mostly Clear | 9 mph SW | 0% |
| Sunday | 88°F | Sunny | 10 mph SW | 0% |
| Sunday Night | 58°F | Mostly Clear | 13 mph SW | 0% |
| Monday | 82°F | Sunny | 13 mph SW | 0% |
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
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Alhambra Valley
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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
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Knightsen
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Montalvin Manor
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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 Aug 4, 2026.