Atwater, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Atwater, a city in Merced County, California.
Tonight
56°F
Clear
Clear. Low around 56, with temperatures rising to around 58 overnight. North wind around 0 mph.
7-day forecast for Atwater
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Clear | 0 mph | 0% |
| Saturday | 90°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 58°F | Partly Cloudy | 0 to 5 mph NW | 0% |
| Sunday | 88°F | Partly Sunny | 0 to 10 mph NW | 0% |
| Sunday Night | 58°F | Mostly Cloudy | 5 to 10 mph NW | 1% |
| Monday | 88°F | Mostly Sunny | 5 mph NW | 1% |
| Monday Night | 57°F | Mostly Clear | 5 mph WNW | 0% |
| Tuesday | 90°F | Sunny | 5 mph NW | 0% |
| Tuesday Night | 58°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Wednesday | 94°F | Sunny | 0 to 5 mph NW | 0% |
| Wednesday Night | 61°F | Mostly Clear | 0 to 5 mph NNW | 0% |
| Thursday | 97°F | Sunny | 0 to 5 mph NW | 0% |
| Thursday Night | 62°F | Mostly Clear | 0 to 5 mph NW | 1% |
| Friday | 93°F | Sunny | 0 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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Merced
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University of California-Merced
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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 Sep 19, 2026.