Coal Creek, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coal Creek, a community in Boulder County, Colorado.
Today
61°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms between noon and 2pm, then showers and thunderstorms likely. Partly sunny. High near 61, with temperatures falling to around 53 in the afternoon. South southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Coal Creek
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 61°F | Partly Sunny then Chance Showers And Thunderstorms | 5 mph SSW | 57% |
| Tonight | 42°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 31% |
| Sunday | 57°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 mph NNW | 29% |
| Sunday Night | 40°F | Chance Showers And Thunderstorms then Mostly Clear | 2 mph WNW | 26% |
| Monday | 57°F | Sunny | 0 to 6 mph SSW | 5% |
| Monday Night | 42°F | Partly Cloudy | 0 to 3 mph WNW | 9% |
| Tuesday | 61°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 mph S | 33% |
| Tuesday Night | 43°F | Chance Showers And Thunderstorms then Partly Cloudy | 3 mph S | 27% |
| Wednesday | 63°F | Partly Sunny then Chance Showers And Thunderstorms | 3 mph NNE | 37% |
| Wednesday Night | 43°F | Slight Chance Rain Showers then Mostly Cloudy | 1 to 5 mph NW | 16% |
| Thursday | 63°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph NE | 18% |
| Thursday Night | 45°F | Slight Chance Rain Showers then Partly Cloudy | 2 mph SW | 16% |
| Friday | 63°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 mph SSE | 31% |
| Friday Night | 46°F | Chance Rain Showers | 1 to 6 mph SSW | 25% |
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 19, 2026.