Valmont, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Valmont, a community in Boulder County, Colorado.
Today
55°F
Partly Sunny then Slight Chance Rain Showers
A slight chance of rain showers after 5pm. Partly sunny. High near 55, with temperatures falling to around 52 in the afternoon. North northeast wind 1 to 5 mph. Chance of precipitation is 20%.
7-day forecast for Valmont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 55°F | Partly Sunny then Slight Chance Rain Showers | 1 to 5 mph NNE | 16% |
| Tonight | 36°F | Slight Chance Rain Showers then Mostly Cloudy | 1 to 5 mph NW | 16% |
| Thursday | 58°F | Sunny | 1 to 5 mph S | 0% |
| Thursday Night | 37°F | Partly Cloudy | 2 mph W | 1% |
| Friday | 57°F | Mostly Sunny then Slight Chance Rain Showers | 3 mph NE | 16% |
| Friday Night | 33°F | Slight Chance Rain Showers then Partly Cloudy | 3 mph WNW | 16% |
| Saturday | 59°F | Sunny | 5 mph SE | 1% |
| Saturday Night | 34°F | Mostly Clear | 3 mph SW | 0% |
| Sunday | 66°F | Sunny | 3 mph S | 0% |
| Sunday Night | 40°F | Mostly Clear | 3 to 8 mph W | 0% |
| Monday | 66°F | Sunny | 1 to 5 mph N | 0% |
| Monday Night | 39°F | Partly Cloudy | 1 mph W | 0% |
| Tuesday | 64°F | Mostly Sunny | 2 mph NE | 1% |
| Tuesday Night | 40°F | Partly Cloudy | 3 mph W | 1% |
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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Lazy Acres
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Longmont
Louisville
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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 Nov 4, 2026.