Calhan, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Calhan, a town in El Paso County, Colorado.
This Afternoon
80°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 4pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 80. East southeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Calhan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Showers And Thunderstorms Likely | 5 to 10 mph ESE | 55% |
| Tonight | 53°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph NNW | 36% |
| Saturday | 76°F | Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SSW | 34% |
| Saturday Night | 50°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 55% |
| Sunday | 69°F | Mostly Sunny then Showers And Thunderstorms Likely | 5 to 10 mph SSE | 72% |
| Sunday Night | 47°F | Showers And Thunderstorms Likely | 5 to 10 mph S | 65% |
| Monday | 68°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 16% |
| Monday Night | 49°F | Chance Showers And Thunderstorms | 10 to 15 mph SSE | 50% |
| Tuesday | 71°F | Mostly Sunny | 15 mph S | 9% |
| Tuesday Night | 51°F | Chance Showers And Thunderstorms then Mostly Cloudy | 15 mph SSE | 45% |
| Wednesday | 72°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 10 mph S | 22% |
| Wednesday Night | 52°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 5 to 10 mph S | 21% |
| Thursday | 74°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph N | 17% |
| Thursday Night | 52°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSE | 24% |
Forecast source: National Weather Service (api.weather.gov) for Calhan (39.034, -104.299). Updated through the day.
Growing snapshot for Calhan
Last spring frost
May 9
First fall frost
Oct 4
Growing season
146 days
Hardiness zone
5b
More local growing data for Calhan: nearby ZIP 80808 weather · frost dates · planting calendar · Colorado frost dates
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Climate data from the nearest NOAA station, Rush 1N, Co (15.2 mi from Calhan). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.