Fairmount, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fairmount, a community in Jefferson County, Colorado.
Overnight
60°F
Patchy Smoke
Patchy smoke. Mostly cloudy. Low around 60, with temperatures rising to around 63 overnight. North northeast wind around 9 mph.
7-day forecast for Fairmount
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 60°F | Patchy Smoke | 9 mph NNE | 13% |
| Tuesday | 78°F | Patchy Smoke | 7 mph ENE | 22% |
| Tuesday Night | 57°F | Patchy Smoke | 2 to 7 mph NNE | 13% |
| Wednesday | 87°F | Patchy Smoke then Sunny | 2 to 8 mph NE | 0% |
| Wednesday Night | 60°F | Mostly Clear | 3 to 8 mph N | 2% |
| Thursday | 95°F | Sunny | 2 to 8 mph N | 1% |
| Thursday Night | 64°F | Clear | 8 mph SSW | 2% |
| Friday | 97°F | Sunny | 3 to 8 mph SSE | 0% |
| Friday Night | 67°F | Mostly Clear | 6 to 9 mph S | 1% |
| Saturday | 99°F | Sunny | 5 to 9 mph NE | 2% |
| Saturday Night | 68°F | Partly Cloudy | 6 to 9 mph WNW | 0% |
| Sunday | 98°F | Sunny | 8 mph E | 10% |
| Sunday Night | 69°F | Partly Cloudy | 8 mph WNW | 3% |
| Monday | 97°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 to 10 mph NNE | 23% |
Forecast source: National Weather Service (api.weather.gov) for Fairmount (39.793, -105.171). Updated through the day.
Growing snapshot for Fairmount
Last spring frost
May 5
First fall frost
Oct 5
Growing season
151 days
Hardiness zone
6a
More local growing data for Fairmount: nearby ZIP 80004 weather · frost dates · planting calendar · Colorado frost dates
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Wheat Ridge
Climate data from the nearest NOAA station, Wheat Ridge 2, Co (2.7 mi from Fairmount). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.