Granite Bay, CA Weather & Growing Conditions
This Afternoon
62°F
Chance Light Rain
A chance of rain. Mostly cloudy. High near 62, with temperatures falling to around 58 in the afternoon. East wind 2 to 6 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 62°F | Chance Light Rain | 2 to 6 mph E | 36% |
| Tonight | 47°F | Slight Chance Light Rain then Partly Cloudy | 5 mph NE | 19% |
| Wednesday | 67°F | Sunny | 2 to 7 mph NW | 0% |
| Wednesday Night | 46°F | Partly Cloudy | 2 mph NNE | 0% |
| Thursday | 69°F | Sunny | 3 mph NNW | 0% |
| Thursday Night | 45°F | Clear | 3 mph ENE | 0% |
| Friday | 71°F | Sunny | 3 mph N | 0% |
| Friday Night | 48°F | Clear | 5 mph E | 0% |
| Saturday | 74°F | Sunny | 1 to 5 mph N | 0% |
| Saturday Night | 49°F | Mostly Clear | 3 mph E | 0% |
| Sunday | 74°F | Mostly Sunny | 3 mph N | 0% |
| Sunday Night | 51°F | Partly Cloudy | 3 mph ENE | 0% |
| Monday | 72°F | Mostly Sunny | 3 mph SSE | 2% |
| Monday Night | 50°F | Partly Cloudy | 2 mph ESE | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Granite Bay, CA
Last spring frost
Feb 25
First fall frost
Dec 5
Growing season
286 days
Hardiness zone
9b
Explore more for Granite Bay, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Auburn, Ca (11.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.