Discovery Bay, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Discovery Bay, a community in Contra Costa County, California.
Overnight
49°F
Partly Cloudy
Partly cloudy, with a low around 49. Northwest wind around 5 mph.
7-day forecast for Discovery Bay
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Partly Cloudy | 5 mph NW | 0% |
| Wednesday | 70°F | Sunny | 5 to 8 mph NW | 1% |
| Wednesday Night | 49°F | Mostly Cloudy | 3 mph W | 1% |
| Thursday | 73°F | Mostly Sunny | 2 to 7 mph NW | 0% |
| Thursday Night | 47°F | Clear | 0 to 3 mph WNW | 0% |
| Friday | 72°F | Sunny | 0 to 5 mph NNW | 0% |
| Friday Night | 48°F | Mostly Clear | 0 mph | 0% |
| Saturday | 74°F | Sunny | 2 mph NNE | 0% |
| Saturday Night | 50°F | Mostly Clear | 1 mph W | 0% |
| Sunday | 74°F | Sunny | 1 to 5 mph NW | 0% |
| Sunday Night | 51°F | Partly Cloudy | 2 mph NNW | 0% |
| Monday | 73°F | Mostly Sunny | 0 to 3 mph WNW | 0% |
| Monday Night | 50°F | Partly Cloudy | 2 mph W | 1% |
| Tuesday | 73°F | Sunny | 2 mph NW | 4% |
Forecast source: National Weather Service (api.weather.gov) for Discovery Bay (37.908, -121.597). Updated through the day.
Growing snapshot for Discovery Bay
Last spring frost
Jan 19
First fall frost
Dec 10
Growing season
330 days
Hardiness zone
9b
More local growing data for Discovery Bay: nearby ZIP 94505 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
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Clyde
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Contra Costa Centre
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East Richmond Heights
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Mountain View
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Climate data from the nearest NOAA station, Tracy Pumping Plt, Ca (5.3 mi from Discovery Bay). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.