Greenwater, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greenwater, a community in King County, Washington.
Today
74°F
Mostly Sunny
Mostly sunny. High near 74, with temperatures falling to around 72 in the afternoon. North wind 0 to 7 mph.
7-day forecast for Greenwater
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Mostly Sunny | 0 to 7 mph N | 0% |
| Tonight | 47°F | Mostly Clear | 0 to 7 mph SE | 0% |
| Sunday | 79°F | Sunny | 2 to 7 mph NW | 0% |
| Sunday Night | 48°F | Mostly Clear | 1 to 6 mph S | 0% |
| Monday | 71°F | Mostly Sunny | 0 to 8 mph SSW | 0% |
| Monday Night | 43°F | Partly Cloudy | 1 to 8 mph SSW | 0% |
| Tuesday | 65°F | Partly Sunny | 1 to 9 mph SSW | 0% |
| Tuesday Night | 40°F | Mostly Cloudy | 1 to 8 mph SW | 0% |
| Wednesday | 64°F | Partly Sunny | 1 to 8 mph SW | 7% |
| Wednesday Night | 42°F | Mostly Cloudy | 1 to 7 mph SSW | 7% |
| Thursday | 62°F | Mostly Cloudy then Slight Chance Light Rain | 0 to 6 mph N | 18% |
| Thursday Night | 40°F | Slight Chance Light Rain | 2 to 6 mph SW | 20% |
| Friday | 60°F | Slight Chance Light Rain | 1 to 7 mph W | 21% |
| Friday Night | 39°F | Slight Chance Light Rain then Partly Cloudy | 7 mph S | 17% |
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 Sep 19, 2026.