Harman US

August, CA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for August, a community in San Joaquin County, California.

This Afternoon
63°F
Chance Light Rain
A chance of rain before 5pm. Partly sunny. High near 63, with temperatures falling to around 61 in the afternoon. East northeast wind 2 to 7 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for August

WhenTempForecastWindPrecip
This Afternoon 63°F Chance Light Rain 2 to 7 mph ENE 36%
Tonight 50°F Patchy Fog then Partly Cloudy 1 to 7 mph N 9%
Wednesday 68°F Sunny 3 to 7 mph NW 0%
Wednesday Night 50°F Mostly Cloudy 3 mph NW 0%
Thursday 70°F Mostly Sunny 2 to 6 mph NW 0%
Thursday Night 48°F Clear then Patchy Fog 0 to 3 mph N 0%
Friday 70°F Patchy Fog then Sunny 3 mph NNW 0%
Friday Night 48°F Clear 2 mph NE 0%
Saturday 74°F Sunny 1 mph ENE 0%
Saturday Night 51°F Mostly Clear 1 mph N 0%
Sunday 73°F Mostly Sunny 3 mph NW 0%
Sunday Night 51°F Partly Cloudy 1 mph NNW 0%
Monday 72°F Mostly Sunny 2 mph NW 0%
Monday Night 51°F Partly Cloudy 2 mph WNW 1%

Forecast source: National Weather Service (api.weather.gov) for August (37.980, -121.263). Updated through the day.

Growing snapshot for August

Last spring frost
Feb 5
First fall frost
Dec 8
Growing season
305 days
Hardiness zone
9b

More local growing data for August: nearby ZIP 95205 weather · frost dates · planting calendar · California frost dates

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Climate data from the nearest NOAA station, Stockton Fire Stn 4, Ca (4 mi from August). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.