Rosemont, CA Weather & Growing Conditions
Overnight
48°F
Mostly Clear
Mostly clear. Low around 48, with temperatures rising to around 50 overnight. North northwest wind around 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Mostly Clear | 8 mph NNW | 0% |
| Wednesday | 68°F | Sunny | 3 to 9 mph NW | 1% |
| Wednesday Night | 47°F | Mostly Cloudy | 2 mph NNE | 1% |
| Thursday | 70°F | Sunny | 5 mph NNW | 0% |
| Thursday Night | 45°F | Clear | 0 to 3 mph ENE | 0% |
| Friday | 69°F | Sunny | 2 mph N | 0% |
| Friday Night | 47°F | Mostly Clear | 1 mph N | 0% |
| Saturday | 72°F | Sunny | 1 mph NW | 0% |
| Saturday Night | 48°F | Mostly Clear | 1 mph NW | 0% |
| Sunday | 72°F | Sunny | 3 mph NW | 0% |
| Sunday Night | 49°F | Partly Cloudy | 1 mph WNW | 0% |
| Monday | 71°F | Mostly Sunny | 2 mph WSW | 1% |
| Monday Night | 49°F | Partly Cloudy | 2 mph N | 1% |
| Tuesday | 71°F | Sunny | 2 mph NNW | 7% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Rosemont, CA
Last spring frost
Jan 12
First fall frost
Dec 16
Growing season
341 days
Hardiness zone
9b
Explore more for Rosemont, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Sacramento 5 Ese, Ca (2.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.