Grand Lake, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grand Lake, a town in Grand County, Colorado.
Today
48°F
Mostly Sunny
Mostly sunny. High near 48, with temperatures falling to around 40 in the afternoon. West southwest wind around 5 mph.
7-day forecast for Grand Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 48°F | Mostly Sunny | 5 mph WSW | 5% |
| Tonight | 17°F | Partly Cloudy | 1 mph NNE | 5% |
| Wednesday | 53°F | Slight Chance Snow Showers | 0 to 6 mph ENE | 32% |
| Wednesday Night | 16°F | Slight Chance Snow Showers then Mostly Cloudy | 0 to 5 mph NNE | 20% |
| Thursday | 52°F | Sunny | 0 to 3 mph WSW | 0% |
| Thursday Night | 19°F | Partly Cloudy | 2 mph WNW | 4% |
| Friday | 49°F | Mostly Sunny then Slight Chance Snow Showers | 0 to 7 mph W | 20% |
| Friday Night | 16°F | Slight Chance Snow Showers then Partly Cloudy | 3 mph W | 20% |
| Saturday | 52°F | Sunny | 0 to 5 mph WSW | 5% |
| Saturday Night | 19°F | Mostly Clear | 3 mph W | 1% |
| Sunday | 58°F | Sunny | 1 to 7 mph WSW | 0% |
| Sunday Night | 23°F | Mostly Clear | 3 to 7 mph W | 0% |
| Monday | 59°F | Mostly Sunny | 5 mph WNW | 1% |
| Monday Night | 25°F | Partly Cloudy | 5 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Grand Lake (40.256, -105.829). Updated through the day.
Growing snapshot for Grand Lake
Growing season
54 days
Hardiness zone
5a
More local growing data for Grand Lake: nearby ZIP 80447 weather · frost dates · planting calendar · Colorado frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Grand Lake 1 Nw, Co (2.1 mi from Grand Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.