Whitmore, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Whitmore, a community in Shasta County, California.
Today
54°F
Light Rain
Rain before 4pm, then haze and areas of fog. Mostly cloudy. High near 54, with temperatures falling to around 49 in the afternoon. West northwest wind 0 to 3 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Whitmore
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 54°F | Light Rain | 0 to 3 mph WNW | 83% |
| Tonight | 38°F | Haze | 0 to 3 mph ENE | 3% |
| Wednesday | 63°F | Mostly Sunny | 0 to 5 mph NNE | 0% |
| Wednesday Night | 42°F | Partly Cloudy | 0 to 5 mph ENE | 0% |
| Thursday | 68°F | Sunny | 0 to 5 mph N | 0% |
| Thursday Night | 45°F | Mostly Clear | 0 to 6 mph NE | 0% |
| Friday | 72°F | Mostly Sunny | 0 to 5 mph N | 0% |
| Friday Night | 49°F | Mostly Clear | 0 to 5 mph ENE | 0% |
| Saturday | 70°F | Sunny | 0 to 3 mph NNE | 0% |
| Saturday Night | 46°F | Mostly Clear | 2 mph ENE | 0% |
| Sunday | 69°F | Mostly Sunny | 0 to 3 mph NNE | 0% |
| Sunday Night | 47°F | Partly Cloudy | 2 mph NE | 1% |
| Monday | 67°F | Mostly Sunny | 2 mph N | 5% |
| Monday Night | 47°F | Partly Cloudy | 2 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Whitmore (40.613, -121.936). Updated through the day.
Growing snapshot for Whitmore
Last spring frost
Jun 9
First fall frost
Sep 21
Growing season
102 days
Hardiness zone
9a
More local growing data for Whitmore: nearby ZIP 96096 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Manzanita Lake, Ca (17 mi from Whitmore). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.