Lake Ketchum, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lake Ketchum, a community in Skagit County, Washington.
Today
69°F
Mostly Sunny
Mostly sunny. High near 69, with temperatures falling to around 67 in the afternoon. West wind 1 to 6 mph.
7-day forecast for Lake Ketchum
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Mostly Sunny | 1 to 6 mph W | 0% |
| Tonight | 51°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
| Sunday | 69°F | Partly Sunny | 0 to 7 mph WSW | 0% |
| Sunday Night | 52°F | Partly Cloudy | 0 to 6 mph WNW | 0% |
| Monday | 68°F | Mostly Sunny | 0 to 6 mph WSW | 0% |
| Monday Night | 52°F | Partly Cloudy | 0 to 6 mph NW | 0% |
| Tuesday | 66°F | Partly Sunny | 0 to 6 mph WSW | 0% |
| Tuesday Night | 51°F | Mostly Cloudy | 1 to 6 mph ENE | 13% |
| Wednesday | 64°F | Partly Sunny then Slight Chance Light Rain | 1 to 5 mph SSW | 18% |
| Wednesday Night | 52°F | Slight Chance Light Rain then Mostly Cloudy | 1 to 5 mph WNW | 18% |
| Thursday | 63°F | Mostly Cloudy then Slight Chance Light Rain | 1 to 8 mph NW | 16% |
| Thursday Night | 51°F | Slight Chance Light Rain | 2 to 8 mph WNW | 22% |
| Friday | 62°F | Slight Chance Light Rain then Partly Sunny | 2 to 7 mph WNW | 22% |
| Friday Night | 50°F | Slight Chance Light Rain | 2 to 7 mph N | 15% |
Forecast source: National Weather Service (api.weather.gov) for Lake Ketchum (48.286, -122.346). Updated through the day.
Growing snapshot for Lake Ketchum
Last spring frost
Mar 24
First fall frost
Nov 3
Growing season
224 days
Hardiness zone
8b
More local growing data for Lake Ketchum: nearby ZIP 98238 weather · frost dates · planting calendar · Washington frost dates
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La Conner
Lake McMurray
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Marblemount
Mount Vernon
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Sedro-Woolley
Climate data from the nearest NOAA station, Mt Vernon 3 Wnw, Wa (7.5 mi from Lake Ketchum). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.