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
64°F
Patchy Smoke
Patchy smoke before noon, then patchy smoke and a chance of showers and thunderstorms. Mostly sunny. High near 64, with temperatures falling to around 60 in the afternoon. East southeast wind around 7 mph. Chance of precipitation is 30%.
7-day forecast for Coal Creek
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 64°F | Patchy Smoke | 7 mph ESE | 26% |
| Tonight | 50°F | Patchy Smoke | 2 to 7 mph E | 15% |
| Wednesday | 71°F | Mostly Sunny | 7 mph N | 2% |
| Wednesday Night | 51°F | Mostly Clear | 2 to 7 mph SSW | 1% |
| Thursday | 79°F | Sunny | 7 mph NW | 2% |
| Thursday Night | 55°F | Clear | 3 to 9 mph WNW | 1% |
| Friday | 81°F | Sunny | 5 to 9 mph NNE | 0% |
| Friday Night | 59°F | Mostly Clear | 2 to 12 mph SSW | 0% |
| Saturday | 82°F | Sunny | 3 to 12 mph N | 5% |
| Saturday Night | 60°F | Mostly Clear | 3 to 7 mph WNW | 1% |
| Sunday | 81°F | Sunny | 3 to 7 mph N | 11% |
| Sunday Night | 61°F | Partly Cloudy | 3 to 9 mph WNW | 6% |
| Monday | 80°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 9 mph N | 43% |
| Monday Night | 59°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 7 mph W | 22% |
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 Aug 4, 2026.