Greenwater, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greenwater, a community in King County, Washington.
This Afternoon
58°F
Partly Sunny
Partly sunny. High near 58, with temperatures falling to around 52 in the afternoon. North northeast wind around 3 mph.
7-day forecast for Greenwater
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 58°F | Partly Sunny | 3 mph NNE | 5% |
| Tonight | 32°F | Partly Cloudy | 6 mph ESE | 4% |
| Wednesday | 59°F | Mostly Sunny then Slight Chance Light Rain | 0 to 3 mph SSE | 15% |
| Wednesday Night | 37°F | Light Rain | 1 to 5 mph SSW | 98% |
| Thursday | 53°F | Chance Light Rain then Partly Sunny | 2 to 6 mph W | 31% |
| Thursday Night | 34°F | Light Rain | 2 to 7 mph SSE | 83% |
| Friday | 54°F | Light Rain | 3 to 7 mph SSE | 83% |
| Friday Night | 37°F | Chance Light Rain | 3 to 7 mph SSE | 44% |
| Saturday | 61°F | Partly Sunny then Slight Chance Light Rain | 7 mph ESE | 20% |
| Saturday Night | 39°F | Light Rain | 7 to 16 mph SSE | 82% |
| Sunday | 53°F | Light Rain | 3 to 12 mph WSW | 82% |
| Sunday Night | 33°F | Slight Chance Light Rain then Mostly Cloudy | 3 to 7 mph SSE | 18% |
| Monday | 55°F | Chance Light Rain | 2 to 7 mph ESE | 50% |
| Monday Night | 36°F | Light Rain Likely | 2 to 9 mph ESE | 64% |
Forecast source: National Weather Service (api.weather.gov) for Greenwater (47.144, -121.628). Updated through the day.
Growing snapshot for Greenwater
Last spring frost
Apr 18
First fall frost
Oct 31
Growing season
196 days
Hardiness zone
8a
More local growing data for Greenwater: nearby ZIP 98022 weather · frost dates · planting calendar · Washington frost dates
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Climate data from the nearest NOAA station, Mud Mtn Dam, Wa (12 mi from Greenwater). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.