Koosharem, UT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Koosharem, a town in Piute County, Utah.
Tonight
44°F
Scattered Showers And Thunderstorms then Partly Cloudy
Scattered showers and thunderstorms before 9pm, then scattered showers and thunderstorms between 9pm and midnight. Partly cloudy. Low around 44, with temperatures rising to around 46 overnight. South southwest wind 2 to 12 mph. Chance of precipitation is 40%.
7-day forecast for Koosharem
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 44°F | Scattered Showers And Thunderstorms then Partly Cloudy | 2 to 12 mph SSW | 39% |
| Saturday | 72°F | Sunny | 1 to 13 mph WSW | 5% |
| Saturday Night | 41°F | Mostly Clear | 2 to 12 mph N | 0% |
| Sunday | 73°F | Sunny | 1 to 7 mph NNW | 0% |
| Sunday Night | 45°F | Partly Cloudy | 2 to 9 mph ENE | 0% |
| Monday | 75°F | Mostly Sunny | 2 to 8 mph SSE | 7% |
| Monday Night | 46°F | Chance Showers And Thunderstorms | 6 mph SSE | 36% |
| Tuesday | 70°F | Showers And Thunderstorms Likely | 2 to 8 mph SE | 74% |
| Tuesday Night | 43°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SSE | 31% |
| Wednesday | 72°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 1 to 6 mph SSE | 21% |
| Wednesday Night | 44°F | Mostly Clear | 5 mph SE | 8% |
| Thursday | 73°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 6 mph SE | 18% |
| Thursday Night | 46°F | Slight Chance Rain Showers | 2 to 6 mph SSE | 18% |
| Friday | 73°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph S | 32% |
Forecast source: National Weather Service (api.weather.gov) for Koosharem (38.513, -111.882). Updated through the day.
Growing snapshot for Koosharem
Last spring frost
Jun 6
First fall frost
Sep 21
Growing season
104 days
Hardiness zone
5b
More local growing data for Koosharem: nearby ZIP 84732 weather · frost dates · planting calendar · Utah frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Koosharem, Ut (4.5 mi from Koosharem). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.