Atwater, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Atwater, a city in Merced County, California.
Overnight
65°F
Clear
Clear. Low around 65, with temperatures rising to around 67 overnight. Northwest wind around 5 mph.
7-day forecast for Atwater
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 65°F | Clear | 5 mph NW | 0% |
| Tuesday | 104°F | Sunny | 5 to 10 mph NW | 0% |
| Tuesday Night | 66°F | Clear | 5 to 10 mph WNW | 0% |
| Wednesday | 102°F | Sunny | 5 to 10 mph NW | 0% |
| Wednesday Night | 65°F | Clear | 5 to 10 mph NW | 0% |
| Thursday | 102°F | Sunny | 5 to 10 mph NW | 0% |
| Thursday Night | 66°F | Clear | 5 to 10 mph NW | 0% |
| Friday | 102°F | Sunny | 5 to 10 mph NW | 0% |
| Friday Night | 67°F | Clear | 5 to 10 mph NW | 0% |
| Saturday | 104°F | Sunny | 5 to 10 mph NW | 0% |
| Saturday Night | 67°F | Mostly Clear | 5 to 10 mph NW | 0% |
| Sunday | 102°F | Sunny | 5 to 10 mph WNW | 0% |
| Sunday Night | 64°F | Mostly Clear | 5 to 10 mph WNW | 0% |
| Monday | 98°F | Sunny | 5 to 10 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Atwater (37.354, -120.597). Updated through the day.
Growing snapshot for Atwater
Last spring frost
Mar 3
First fall frost
Nov 24
Growing season
263 days
Hardiness zone
9b
More local growing data for Atwater: nearby ZIP 95388 weather · frost dates · planting calendar · California frost dates
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Hilmar-Irwin
Le Grand
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Los Banos
McSwain
Merced
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Santa Nella
Snelling
South Dos Palos
Stevinson
Tuttle
University of California-Merced
Volta
Winton
Climate data from the nearest NOAA station, Merced, Ca (10.2 mi from Atwater). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.