Ketchum, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ketchum, a city in Blaine County, Idaho.
This Afternoon
65°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 65, with temperatures falling to around 60 in the afternoon. West southwest wind around 3 mph. Chance of precipitation is 70%.
7-day forecast for Ketchum
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 65°F | Showers And Thunderstorms Likely | 3 mph WSW | 73% |
| Tonight | 38°F | Chance Showers And Thunderstorms | 5 mph NNW | 49% |
| Saturday | 62°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 5 mph SE | 47% |
| Saturday Night | 38°F | Partly Cloudy | 1 to 5 mph N | 14% |
| Sunday | 69°F | Mostly Sunny | 2 to 6 mph W | 3% |
| Sunday Night | 40°F | Mostly Clear | 3 mph S | 4% |
| Monday | 71°F | Sunny | 6 mph S | 3% |
| Monday Night | 42°F | Partly Cloudy | 3 mph W | 1% |
| Tuesday | 73°F | Mostly Sunny | 3 to 7 mph S | 5% |
| Tuesday Night | 42°F | Mostly Clear | 3 mph NW | 3% |
| Wednesday | 73°F | Sunny | 6 mph SW | 1% |
| Wednesday Night | 42°F | Mostly Clear | 5 mph N | 3% |
| Thursday | 74°F | Sunny | 7 mph ESE | 3% |
| Thursday Night | 44°F | Partly Cloudy | 5 mph NE | 1% |
Forecast source: National Weather Service (api.weather.gov) for Ketchum (43.688, -114.380). Updated through the day.
Growing snapshot for Ketchum
Growing season
77 days
Hardiness zone
5b
More local growing data for Ketchum: nearby ZIP 83353 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Ketchum Rs, Id (1.8 mi from Ketchum). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.