South Cle Elum, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Cle Elum, a town in Kittitas County, Washington.
Today
79°F
Mostly Sunny
Mostly sunny. High near 79, with temperatures falling to around 77 in the afternoon. Southeast wind around 2 mph.
7-day forecast for South Cle Elum
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Mostly Sunny | 2 mph SE | 0% |
| Tonight | 49°F | Mostly Clear | 1 mph NW | 0% |
| Sunday | 80°F | Sunny | 0 to 3 mph E | 0% |
| Sunday Night | 50°F | Mostly Clear | 2 mph NE | 0% |
| Monday | 78°F | Sunny | 0 to 6 mph NW | 0% |
| Monday Night | 47°F | Partly Cloudy | 2 to 6 mph W | 0% |
| Tuesday | 71°F | Mostly Sunny | 2 to 7 mph W | 0% |
| Tuesday Night | 45°F | Partly Cloudy | 2 to 7 mph W | 0% |
| Wednesday | 68°F | Partly Sunny | 2 to 6 mph W | 0% |
| Wednesday Night | 44°F | Mostly Cloudy | 0 to 6 mph NW | 2% |
| Thursday | 67°F | Partly Sunny | 0 to 5 mph NW | 11% |
| Thursday Night | 44°F | Mostly Cloudy | 0 to 5 mph NW | 14% |
| Friday | 63°F | Mostly Sunny | 0 to 5 mph NW | 13% |
| Friday Night | 41°F | Partly Cloudy | 0 to 5 mph NW | 9% |
Forecast source: National Weather Service (api.weather.gov) for South Cle Elum (47.186, -120.953). Updated through the day.
Growing snapshot for South Cle Elum
Last spring frost
May 13
First fall frost
Sep 25
Growing season
132 days
Hardiness zone
7a
More local growing data for South Cle Elum: nearby ZIP 98943 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Cle Elum, Wa (2.5 mi from South Cle Elum). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.