Bloomfield, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bloomfield, a community in Sonoma County, California.
This Afternoon
66°F
Mostly Sunny
Mostly sunny. High near 66, with temperatures falling to around 61 in the afternoon. West wind around 14 mph, with gusts as high as 24 mph.
7-day forecast for Bloomfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Mostly Sunny | 14 mph W | 1% |
| Tonight | 45°F | Mostly Cloudy | 2 to 12 mph NW | 1% |
| Thursday | 70°F | Sunny | 2 to 8 mph NW | 0% |
| Thursday Night | 43°F | Areas Of Fog | 0 to 5 mph NW | 0% |
| Friday | 70°F | Areas Of Fog then Mostly Sunny | 1 to 7 mph NNW | 0% |
| Friday Night | 44°F | Patchy Fog | 0 to 7 mph NNW | 0% |
| Saturday | 73°F | Sunny | 1 to 7 mph ENE | 0% |
| Saturday Night | 45°F | Areas Of Fog | 1 to 7 mph WNW | 0% |
| Sunday | 72°F | Areas Of Fog then Mostly Sunny | 1 to 7 mph NW | 0% |
| Sunday Night | 46°F | Areas Of Fog | 1 to 7 mph WNW | 0% |
| Monday | 70°F | Areas Of Fog then Partly Sunny | 1 to 9 mph NW | 0% |
| Monday Night | 45°F | Areas Of Fog | 0 to 9 mph NW | 1% |
| Tuesday | 70°F | Areas Of Fog then Mostly Sunny | 0 to 8 mph NW | 4% |
| Tuesday Night | 47°F | Areas Of Fog | 0 to 8 mph NW | 15% |
Forecast source: National Weather Service (api.weather.gov) for Bloomfield (38.322, -122.834). Updated through the day.
Growing snapshot for Bloomfield
Last spring frost
Mar 20
First fall frost
Nov 13
Growing season
240 days
Hardiness zone
9a
More local growing data for Bloomfield: nearby ZIP 95472 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Graton, Ca (2.2 mi from Bloomfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.