Zillah, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Zillah, a city in Yakima County, Washington.
Overnight
52°F
Mostly Clear
Mostly clear. Low around 52, with temperatures rising to around 54 overnight. North wind around 2 mph.
7-day forecast for Zillah
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Mostly Clear | 2 mph N | 0% |
| Saturday | 82°F | Sunny | 0 to 5 mph SE | 0% |
| Saturday Night | 52°F | Mostly Clear | 0 to 3 mph E | 0% |
| Sunday | 83°F | Sunny | 0 to 3 mph SE | 0% |
| Sunday Night | 53°F | Clear | 2 mph NE | 0% |
| Monday | 84°F | Sunny | 2 mph NW | 0% |
| Monday Night | 53°F | Partly Cloudy | 3 mph N | 0% |
| Tuesday | 80°F | Mostly Sunny | 2 mph E | 0% |
| Tuesday Night | 51°F | Partly Cloudy | 5 mph NW | 0% |
| Wednesday | 75°F | Mostly Sunny | 2 mph NW | 0% |
| Wednesday Night | 49°F | Partly Cloudy | 3 mph N | 0% |
| Thursday | 72°F | Mostly Sunny | 2 mph NW | 4% |
| Thursday Night | 49°F | Mostly Cloudy | 2 mph NW | 7% |
| Friday | 69°F | Mostly Sunny | 5 mph NW | 5% |
Forecast source: National Weather Service (api.weather.gov) for Zillah (46.408, -120.273). Updated through the day.
Growing snapshot for Zillah
Last spring frost
Apr 21
First fall frost
Oct 15
Growing season
176 days
Hardiness zone
7a
More local growing data for Zillah: nearby ZIP 98921 weather · frost dates · planting calendar · Washington frost dates
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Yakima
Climate data from the nearest NOAA station, Wapato, Wa (4.9 mi from Zillah). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.