Fairmount, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fairmount, a community in Jefferson County, Colorado.
Tonight
33°F
Mostly Clear
Mostly clear, with a low around 33. West southwest wind around 2 mph.
7-day forecast for Fairmount
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 33°F | Mostly Clear | 2 mph WSW | 0% |
| Wednesday | 55°F | Mostly Sunny | 2 to 6 mph N | 13% |
| Wednesday Night | 34°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph WNW | 16% |
| Thursday | 57°F | Sunny | 2 to 7 mph SE | 0% |
| Thursday Night | 35°F | Partly Cloudy | 3 mph SW | 1% |
| Friday | 56°F | Mostly Sunny | 2 to 6 mph NNE | 14% |
| Friday Night | 35°F | Mostly Clear | 6 mph WNW | 14% |
| Saturday | 59°F | Sunny | 2 to 8 mph E | 2% |
| Saturday Night | 35°F | Clear | 5 mph W | 0% |
| Sunday | 67°F | Sunny | 2 to 9 mph S | 0% |
| Sunday Night | 42°F | Mostly Clear | 6 to 10 mph W | 0% |
| Monday | 66°F | Sunny | 3 to 8 mph ESE | 0% |
| Monday Night | 41°F | Partly Cloudy | 5 mph WNW | 0% |
| Tuesday | 64°F | Mostly Sunny | 5 mph NE | 6% |
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 Nov 4, 2026.