Sunnyside, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sunnyside, a city in Yakima County, Washington.
Today
54°F
Patchy Fog
Patchy fog before 1pm. Sunny. High near 54, with temperatures falling to around 49 in the afternoon. East wind around 2 mph.
7-day forecast for Sunnyside
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 54°F | Patchy Fog | 2 mph E | 2% |
| Tonight | 34°F | Patchy Fog then Chance Rain Showers | 1 mph NE | 46% |
| Thursday | 59°F | Patchy Fog then Sunny | 1 mph SW | 7% |
| Thursday Night | 33°F | Patchy Fog | 1 mph SE | 2% |
| Friday | 57°F | Patchy Fog then Mostly Cloudy | 1 mph SE | 4% |
| Friday Night | 34°F | Patchy Fog | 1 mph E | 4% |
| Saturday | 59°F | Patchy Fog then Mostly Sunny | 0 mph | 1% |
| Saturday Night | 36°F | Mostly Cloudy | 0 mph | 2% |
| Sunday | 61°F | Partly Sunny | 0 to 5 mph SW | 2% |
| Sunday Night | 34°F | Mostly Cloudy | 1 mph W | 1% |
| Monday | 56°F | Partly Sunny | 0 mph | 8% |
| Monday Night | 34°F | Mostly Cloudy then Slight Chance Rain Showers | 0 mph | 16% |
| Tuesday | 60°F | Slight Chance Rain Showers | 1 mph SE | 22% |
| Tuesday Night | 36°F | Slight Chance Rain Showers | 0 mph | 22% |
Forecast source: National Weather Service (api.weather.gov) for Sunnyside (46.316, -120.006). Updated through the day.
Growing snapshot for Sunnyside
Last spring frost
Apr 30
First fall frost
Oct 8
Growing season
160 days
Hardiness zone
7b
More local growing data for Sunnyside: nearby ZIP 98938 weather · frost dates · planting calendar · Washington frost dates
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Zillah
Climate data from the nearest NOAA station, Sunnyside #2, Wa (4.4 mi from Sunnyside). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.