Calhan, CO Weather & Growing Conditions
This Afternoon
75°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy, with a high near 75. East southeast wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Showers And Thunderstorms | 10 mph ESE | 75% |
| Tonight | 49°F | Showers And Thunderstorms Likely then Partly Cloudy | 5 to 10 mph NW | 67% |
| Sunday | 70°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph WNW | 58% |
| Sunday Night | 48°F | Showers And Thunderstorms | 5 to 10 mph E | 77% |
| Monday | 68°F | Mostly Sunny | 5 to 10 mph S | 9% |
| Monday Night | 48°F | Chance Showers And Thunderstorms | 15 mph SSE | 42% |
| Tuesday | 71°F | Mostly Sunny | 15 mph S | 7% |
| Tuesday Night | 50°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 15 mph SSE | 22% |
| Wednesday | 74°F | Mostly Cloudy | 10 to 15 mph S | 8% |
| Wednesday Night | 52°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 5 to 10 mph SW | 17% |
| Thursday | 75°F | Mostly Sunny | 10 mph NNE | 9% |
| Thursday Night | 53°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 19% |
| Friday | 73°F | Chance Showers And Thunderstorms | 10 to 15 mph S | 27% |
| Friday Night | 53°F | Chance Showers And Thunderstorms | 10 to 15 mph SSE | 37% |
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 Sep 20, 2026.