Hartsel, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hartsel, a community in Park County, Colorado.
Today
78°F
Patchy Smoke
Patchy smoke before noon, then patchy smoke and a chance of showers and thunderstorms. Partly sunny. High near 78, with temperatures falling to around 71 in the afternoon. South wind 2 to 12 mph, with gusts as high as 18 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Hartsel
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Patchy Smoke | 2 to 12 mph S | 37% |
| Tonight | 46°F | Patchy Smoke then Partly Cloudy | 3 to 12 mph SSW | 13% |
| Wednesday | 80°F | Sunny | 3 to 17 mph WNW | 2% |
| Wednesday Night | 47°F | Mostly Clear | 3 to 15 mph WSW | 0% |
| Thursday | 82°F | Sunny | 3 to 13 mph NW | 4% |
| Thursday Night | 48°F | Mostly Clear | 6 to 13 mph NNW | 2% |
| Friday | 82°F | Sunny | 3 to 10 mph NNW | 1% |
| Friday Night | 50°F | Mostly Clear | 2 to 12 mph NW | 2% |
| Saturday | 82°F | Sunny | 3 to 12 mph NW | 4% |
| Saturday Night | 51°F | Partly Cloudy | 3 to 12 mph NNW | 1% |
| Sunday | 82°F | Sunny | 1 to 10 mph W | 11% |
| Sunday Night | 51°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph NW | 15% |
| Monday | 81°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 10 mph N | 37% |
| Monday Night | 50°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 6 to 10 mph N | 21% |
Forecast source: National Weather Service (api.weather.gov) for Hartsel (39.023, -105.801). Updated through the day.
Growing snapshot for Hartsel
Growing season
57 days
Hardiness zone
4a
More local growing data for Hartsel: nearby ZIP 80449 weather · frost dates · planting calendar · Colorado frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Antero Rsvr, Co (7 mi from Hartsel). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.