Fairmount, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fairmount, a community in Jefferson County, Colorado.
Tonight
55°F
Partly Cloudy
Partly cloudy, with a low around 55. West wind around 5 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Fairmount
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Partly Cloudy | 5 mph W | 7% |
| Saturday | 75°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph NNW | 65% |
| Saturday Night | 51°F | Chance Showers And Thunderstorms then Mostly Cloudy | 1 to 5 mph W | 51% |
| Sunday | 71°F | Chance Showers And Thunderstorms | 1 to 6 mph NNE | 53% |
| Sunday Night | 50°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SSW | 30% |
| Monday | 72°F | Sunny | 0 to 7 mph ENE | 3% |
| Monday Night | 51°F | Mostly Clear | 0 to 6 mph NW | 10% |
| Tuesday | 76°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 6 mph SE | 19% |
| Tuesday Night | 53°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph WNW | 21% |
| Wednesday | 76°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 1 to 6 mph SE | 20% |
| Wednesday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph SW | 19% |
| Thursday | 76°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 6 mph NNW | 18% |
| Thursday Night | 55°F | Chance Rain Showers then Mostly Cloudy | 1 to 5 mph WSW | 30% |
| Friday | 78°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 1 to 6 mph S | 19% |
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 Sep 19, 2026.