Valmont, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Valmont, a community in Boulder County, Colorado.
This Afternoon
77°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. High near 77, with temperatures falling to around 68 in the afternoon. Northwest wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Valmont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Chance Showers And Thunderstorms | 5 mph NW | 47% |
| Tonight | 49°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SSW | 28% |
| Sunday | 70°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 5 mph NE | 30% |
| Sunday Night | 48°F | Slight Chance Rain Showers then Partly Cloudy | 0 to 5 mph NNW | 22% |
| Monday | 73°F | Sunny | 0 to 5 mph ENE | 2% |
| Monday Night | 50°F | Partly Cloudy | 0 to 5 mph N | 4% |
| Tuesday | 77°F | Mostly Sunny | 0 to 5 mph NE | 9% |
| Tuesday Night | 52°F | Partly Cloudy | 0 to 3 mph NW | 13% |
| Wednesday | 79°F | Partly Sunny | 0 to 5 mph NNE | 11% |
| Wednesday Night | 52°F | Mostly Cloudy | 3 mph NW | 9% |
| Thursday | 80°F | Mostly Sunny | 1 to 7 mph SW | 7% |
| Thursday Night | 55°F | Mostly Cloudy | 0 to 6 mph NNW | 12% |
| Friday | 79°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph E | 28% |
| Friday Night | 55°F | Chance Rain Showers | 3 mph SSW | 25% |
Forecast source: National Weather Service (api.weather.gov) for Valmont (40.034, -105.208). Updated through the day.
Growing snapshot for Valmont
Last spring frost
May 6
First fall frost
Oct 5
Growing season
151 days
Hardiness zone
6a
More local growing data for Valmont: nearby ZIP 80301 weather · frost dates · planting calendar · Colorado frost dates
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Climate data from the nearest NOAA station, Boulder, Co (5.1 mi from Valmont). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.