Calhan, CO Weather & Growing Conditions
Today
52°F
Mostly Sunny
Mostly sunny, with a high near 52. Southeast wind 5 to 10 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 52°F | Mostly Sunny | 5 to 10 mph SE | 12% |
| Tonight | 32°F | Chance Rain Showers then Slight Chance Rain And Snow Showers | 10 to 15 mph NNE | 35% |
| Thursday | 53°F | Sunny | 5 to 15 mph NNE | 3% |
| Thursday Night | 32°F | Partly Cloudy | 5 to 10 mph S | 0% |
| Friday | 53°F | Mostly Sunny | 5 to 10 mph NNW | 3% |
| Friday Night | 31°F | Mostly Clear | 5 mph NNW | 3% |
| Saturday | 55°F | Sunny | 5 mph N | 2% |
| Saturday Night | 33°F | Mostly Clear | 5 to 10 mph WNW | 0% |
| Sunday | 60°F | Sunny | 10 mph SSW | 0% |
| Sunday Night | 39°F | Mostly Clear | 5 to 10 mph W | 0% |
| Monday | 64°F | Sunny | 5 mph NE | 0% |
| Monday Night | 38°F | Partly Cloudy | 5 to 10 mph SW | 0% |
| Tuesday | 61°F | Mostly Sunny | 5 to 10 mph SSW | 1% |
| Tuesday Night | 39°F | Partly Cloudy | 5 to 10 mph W | 1% |
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 Nov 4, 2026.