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
80°F
Patchy Smoke
Patchy smoke. Sunny. High near 80, with temperatures falling to around 78 in the afternoon. Southwest wind 3 to 13 mph, with gusts as high as 25 mph.
7-day forecast for Grand Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Patchy Smoke | 3 to 13 mph SW | 9% |
| Tonight | 42°F | Patchy Smoke | 2 to 9 mph SSE | 7% |
| Wednesday | 80°F | Sunny | 2 to 14 mph WSW | 0% |
| Wednesday Night | 42°F | Mostly Clear | 2 to 14 mph WNW | 0% |
| Thursday | 83°F | Sunny | 2 to 12 mph W | 0% |
| Thursday Night | 45°F | Clear | 1 to 10 mph NW | 0% |
| Friday | 85°F | Sunny | 1 to 10 mph W | 0% |
| Friday Night | 48°F | Mostly Clear | 2 to 9 mph NE | 0% |
| Saturday | 85°F | Sunny | 2 to 9 mph WNW | 1% |
| Saturday Night | 51°F | Partly Cloudy | 2 to 7 mph N | 0% |
| Sunday | 85°F | Sunny | 2 to 9 mph WNW | 7% |
| Sunday Night | 51°F | Partly Cloudy | 2 to 8 mph SSW | 9% |
| Monday | 84°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 8 mph WSW | 38% |
| Monday Night | 48°F | Chance Showers And Thunderstorms then Mostly Cloudy | 2 to 7 mph NW | 34% |
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 Aug 4, 2026.