Zillah, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Zillah, a city in Yakima County, Washington.
Tonight
32°F
Areas Of Fog
Areas of fog after 10pm. Mostly clear, with a low around 32. North wind around 1 mph.
7-day forecast for Zillah
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 32°F | Areas Of Fog | 1 mph N | 2% |
| Wednesday | 55°F | Areas Of Fog then Sunny | 0 to 3 mph SE | 5% |
| Wednesday Night | 37°F | Chance Rain Showers | 2 mph E | 50% |
| Thursday | 59°F | Patchy Fog then Mostly Sunny | 2 mph W | 1% |
| Thursday Night | 36°F | Partly Cloudy | 2 mph N | 5% |
| Friday | 58°F | Mostly Cloudy | 2 mph SW | 5% |
| Friday Night | 36°F | Mostly Cloudy | 2 mph W | 2% |
| Saturday | 59°F | Partly Sunny | 2 mph E | 0% |
| Saturday Night | 39°F | Mostly Cloudy | 2 mph SW | 7% |
| Sunday | 61°F | Partly Sunny | 2 to 9 mph SW | 7% |
| Sunday Night | 35°F | Mostly Cloudy | 0 to 3 mph W | 6% |
| Monday | 57°F | Partly Sunny | 2 mph SW | 10% |
| Monday Night | 37°F | Chance Rain Showers | 2 mph E | 32% |
| Tuesday | 59°F | Chance Rain Showers | 2 mph SE | 32% |
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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Wapato
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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 Nov 4, 2026.