Zillah, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Zillah, a city in Yakima County, Washington.
Overnight
54°F
Smoke
Smoke. Clear. Low around 54, with temperatures rising to around 56 overnight. North wind around 3 mph.
7-day forecast for Zillah
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Smoke | 3 mph N | 0% |
| Tuesday | 89°F | Smoke | 5 mph S | 0% |
| Tuesday Night | 58°F | Areas Of Smoke | 1 to 5 mph NE | 0% |
| Wednesday | 95°F | Areas Of Smoke | 1 to 5 mph S | 0% |
| Wednesday Night | 60°F | Patchy Smoke then Clear | 2 mph N | 0% |
| Thursday | 100°F | Sunny | 1 to 5 mph SW | 0% |
| Thursday Night | 63°F | Clear | 3 to 7 mph W | 0% |
| Friday | 99°F | Sunny | 6 mph W | 0% |
| Friday Night | 61°F | Mostly Clear | 5 to 13 mph NW | 0% |
| Saturday | 95°F | Sunny | 6 mph NW | 0% |
| Saturday Night | 59°F | Mostly Clear | 6 to 13 mph NW | 0% |
| Sunday | 91°F | Sunny | 3 to 7 mph W | 0% |
| Sunday Night | 57°F | Mostly Clear | 3 to 10 mph NW | 0% |
| Monday | 89°F | Sunny | 6 mph W | 0% |
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 Aug 4, 2026.