Happy Valley, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Happy Valley, a community in Shasta County, California.
This Afternoon
55°F
Chance Light Rain
A chance of rain before 4pm. Mostly cloudy. High near 55, with temperatures falling to around 53 in the afternoon. North northeast wind around 3 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Happy Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 55°F | Chance Light Rain | 3 mph NNE | 34% |
| Tonight | 42°F | Partly Cloudy | 3 mph NW | 4% |
| Wednesday | 67°F | Mostly Sunny | 5 mph NNW | 0% |
| Wednesday Night | 46°F | Partly Cloudy | 5 mph NW | 0% |
| Thursday | 73°F | Sunny | 3 to 9 mph NNW | 0% |
| Thursday Night | 48°F | Mostly Clear | 6 mph NNW | 0% |
| Friday | 74°F | Sunny | 3 mph NNW | 0% |
| Friday Night | 49°F | Mostly Clear | 2 mph NW | 0% |
| Saturday | 71°F | Sunny | 2 mph NE | 0% |
| Saturday Night | 48°F | Mostly Clear | 1 mph N | 0% |
| Sunday | 71°F | Mostly Sunny | 0 to 3 mph N | 0% |
| Sunday Night | 49°F | Partly Cloudy | 1 mph N | 0% |
| Monday | 69°F | Mostly Sunny | 2 mph NNE | 3% |
| Monday Night | 48°F | Partly Cloudy | 1 mph N | 4% |
Forecast source: National Weather Service (api.weather.gov) for Happy Valley (40.466, -122.418). Updated through the day.
Growing snapshot for Happy Valley
Last spring frost
Mar 3
First fall frost
Nov 21
Growing season
261 days
Hardiness zone
9a
More local growing data for Happy Valley: nearby ZIP 96007 weather · frost dates · planting calendar · California frost dates
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Lake California
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Shasta
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Climate data from the nearest NOAA station, Redding Muni Ap, Ca (4.2 mi from Happy Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.