Valmont, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Valmont, a community in Boulder County, Colorado.
Today
78°F
Patchy Smoke
Patchy smoke and a slight chance of rain showers. Mostly sunny, with a high near 78. East northeast wind around 7 mph. Chance of precipitation is 20%.
7-day forecast for Valmont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Patchy Smoke | 7 mph ENE | 17% |
| Tonight | 55°F | Patchy Smoke | 2 to 7 mph NNE | 11% |
| Wednesday | 87°F | Patchy Smoke | 2 to 7 mph NE | 1% |
| Wednesday Night | 58°F | Mostly Clear | 2 to 6 mph N | 1% |
| Thursday | 95°F | Sunny | 2 to 7 mph NNE | 1% |
| Thursday Night | 61°F | Clear | 6 mph WNW | 1% |
| Friday | 98°F | Sunny | 1 to 7 mph S | 0% |
| Friday Night | 65°F | Mostly Clear | 3 to 7 mph SW | 0% |
| Saturday | 100°F | Sunny | 2 to 7 mph N | 3% |
| Saturday Night | 66°F | Partly Cloudy | 6 mph W | 0% |
| Sunday | 99°F | Sunny | 3 to 7 mph NNE | 9% |
| Sunday Night | 67°F | Partly Cloudy | 7 mph WNW | 4% |
| Monday | 97°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 9 mph N | 30% |
| Monday Night | 66°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 to 9 mph W | 18% |
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 Aug 4, 2026.