Waterloo, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Waterloo, a community in San Joaquin County, California.
This Afternoon
64°F
Light Rain
Rain before 5pm. Mostly cloudy. High near 64, with temperatures falling to around 59 in the afternoon. East northeast wind 2 to 7 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Waterloo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Light Rain | 2 to 7 mph ENE | 78% |
| Tonight | 48°F | Haze then Partly Cloudy | 1 to 8 mph NNE | 9% |
| Wednesday | 68°F | Sunny | 5 to 8 mph NW | 0% |
| Wednesday Night | 47°F | Mostly Cloudy | 5 mph NW | 0% |
| Thursday | 70°F | Sunny | 2 to 7 mph NW | 0% |
| Thursday Night | 43°F | Mostly Clear then Patchy Fog | 0 to 3 mph NNE | 0% |
| Friday | 71°F | Patchy Fog then Sunny | 3 mph NNW | 0% |
| Friday Night | 46°F | Clear | 2 mph NE | 0% |
| Saturday | 74°F | Sunny | 2 mph E | 0% |
| Saturday Night | 47°F | Mostly Clear | 1 mph NNE | 0% |
| Sunday | 73°F | Mostly Sunny | 3 mph NW | 0% |
| Sunday Night | 48°F | Partly Cloudy | 2 mph NNW | 0% |
| Monday | 72°F | Mostly Sunny | 3 mph NW | 0% |
| Monday Night | 48°F | Partly Cloudy | 3 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Waterloo (38.036, -121.185). Updated through the day.
Growing snapshot for Waterloo
Last spring frost
Feb 9
First fall frost
Dec 5
Growing season
301 days
Hardiness zone
9b
More local growing data for Waterloo: nearby ZIP 95212 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Acampo
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Country Club
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French Camp
Garden Acres
Kennedy
Lathrop
Lincoln Village
Linden
Lockeford
Lodi
Manteca
Morada
Peters
Ripon
Stockton
Taft Mosswood
Terminous
Thornton
Tracy
Valley Home
Victor
Woodbridge
Climate data from the nearest NOAA station, Lodi, Ca (4.9 mi from Waterloo). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.