Bloomfield, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bloomfield, a community in Sonoma County, California.
This Afternoon
61°F
Light Rain
Rain. Mostly cloudy. High near 61, with temperatures falling to around 55 in the afternoon. South southeast wind around 8 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Bloomfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 61°F | Light Rain | 8 mph SSE | 94% |
| Tonight | 44°F | Chance Light Rain then Mostly Cloudy | 2 to 9 mph ENE | 34% |
| Wednesday | 66°F | Patchy Fog then Sunny | 2 to 13 mph NNW | 1% |
| Wednesday Night | 44°F | Mostly Cloudy | 2 to 12 mph NW | 0% |
| Thursday | 70°F | Sunny | 2 to 8 mph NW | 0% |
| Thursday Night | 43°F | Patchy Fog | 0 to 8 mph NW | 0% |
| Friday | 71°F | Sunny | 0 to 7 mph NNW | 0% |
| Friday Night | 44°F | Patchy Fog then Mostly Clear | 0 to 7 mph NNW | 0% |
| Saturday | 74°F | Sunny | 0 to 7 mph ENE | 0% |
| Saturday Night | 46°F | Patchy Fog | 2 to 7 mph WNW | 0% |
| Sunday | 72°F | Patchy Fog then Mostly Sunny | 1 to 8 mph NW | 0% |
| Sunday Night | 46°F | Areas Of Fog | 1 to 8 mph WNW | 0% |
| Monday | 70°F | Areas Of Fog then Partly Sunny | 1 to 9 mph NW | 3% |
| Monday Night | 45°F | Areas Of Fog | 0 to 9 mph NW | 3% |
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 4, 2026.