Calhan, CO Weather & Growing Conditions
Today
76°F
Patchy Smoke
Patchy smoke before 3pm, then patchy smoke and a slight chance of showers and thunderstorms. Mostly sunny, with a high near 76. East wind 10 to 20 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Patchy Smoke | 10 to 20 mph E | 12% |
| Tonight | 53°F | Patchy Smoke then Partly Cloudy | 15 mph SSE | 11% |
| Wednesday | 82°F | Sunny | 10 to 15 mph ENE | 7% |
| Wednesday Night | 55°F | Mostly Clear | 10 to 15 mph S | 9% |
| Thursday | 88°F | Sunny | 10 to 15 mph WSW | 1% |
| Thursday Night | 59°F | Mostly Clear | 5 to 10 mph S | 3% |
| Friday | 92°F | Sunny | 5 to 10 mph NNE | 1% |
| Friday Night | 62°F | Mostly Clear | 10 mph SSE | 1% |
| Saturday | 93°F | Sunny | 10 mph SSW | 2% |
| Saturday Night | 64°F | Partly Cloudy | 10 mph S | 0% |
| Sunday | 94°F | Sunny | 5 to 10 mph SW | 5% |
| Sunday Night | 64°F | Partly Cloudy | 10 mph SSW | 3% |
| Monday | 93°F | Sunny then Slight Chance Showers And Thunderstorms | 10 mph NNE | 11% |
| Monday Night | 63°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 10 mph NE | 14% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Calhan, CO
Last spring frost
May 9
First fall frost
Oct 4
Growing season
146 days
Hardiness zone
5b
Explore more for Calhan, CO: full frost dates · planting calendar · Colorado frost dates
Climate data from the nearest NOAA station, Rush 1N, Co (15.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.