Harman US

Coal Creek, CO Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Coal Creek, a community in Boulder County, Colorado.

This Afternoon
60°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. High near 60, with temperatures falling to around 52 in the afternoon. West wind around 2 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.

7-day forecast for Coal Creek

WhenTempForecastWindPrecip
This Afternoon 60°F Chance Showers And Thunderstorms 2 mph W 45%
Tonight 42°F Chance Showers And Thunderstorms then Partly Cloudy 3 mph W 28%
Sunday 58°F Chance Showers And Thunderstorms 2 to 6 mph W 26%
Sunday Night 40°F Slight Chance Rain Showers then Partly Cloudy 2 mph NNW 21%
Monday 58°F Sunny 1 to 6 mph SE 3%
Monday Night 42°F Partly Cloudy 0 to 3 mph N 3%
Tuesday 64°F Mostly Sunny then Slight Chance Showers And Thunderstorms 3 mph ENE 22%
Tuesday Night 45°F Slight Chance Showers And Thunderstorms then Mostly Cloudy 3 mph SSW 15%
Wednesday 65°F Partly Sunny then Chance Showers And Thunderstorms 0 to 3 mph NW 25%
Wednesday Night 44°F Mostly Cloudy 0 to 5 mph WNW 10%
Thursday 65°F Mostly Sunny 6 mph NNW 14%
Thursday Night 47°F Slight Chance Rain Showers 2 mph NW 16%
Friday 64°F Partly Sunny then Chance Showers And Thunderstorms 3 mph SSW 43%
Friday Night 47°F Chance Rain Showers 1 to 6 mph SW 30%

Forecast source: National Weather Service (api.weather.gov) for Coal Creek (39.905, -105.372). Updated through the day.

Growing snapshot for Coal Creek

Last spring frost
Jun 5
First fall frost
Sep 16
Growing season
103 days
Hardiness zone
5b

More local growing data for Coal Creek: nearby ZIP 80471 weather · frost dates · planting calendar · Colorado frost dates

Nearby towns & communities

All Colorado locations ›

Climate data from the nearest NOAA station, Coal Creek Canyon, Co (3.3 mi from Coal Creek). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.