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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
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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.