Grand Lake, CO Weather & Growing Conditions
This Afternoon
39°F
Mostly Sunny
Mostly sunny. High near 39, with temperatures falling to around 34 in the afternoon. West wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 39°F | Mostly Sunny | 2 mph W | 5% |
| Tonight | 16°F | Partly Cloudy | 2 mph ESE | 5% |
| Wednesday | 43°F | Chance Snow Showers | 0 to 6 mph ENE | 32% |
| Wednesday Night | 15°F | Slight Chance Snow Showers then Mostly Cloudy | 1 to 6 mph N | 18% |
| Thursday | 44°F | Sunny | 0 to 3 mph WSW | 0% |
| Thursday Night | 19°F | Partly Cloudy | 3 mph SW | 4% |
| Friday | 40°F | Slight Chance Snow Showers | 1 to 7 mph W | 20% |
| Friday Night | 16°F | Slight Chance Snow Showers then Partly Cloudy | 3 mph W | 20% |
| Saturday | 43°F | Sunny | 1 to 5 mph WSW | 6% |
| Saturday Night | 18°F | Clear | 3 mph W | 2% |
| Sunday | 50°F | Sunny | 1 to 7 mph WSW | 0% |
| Sunday Night | 23°F | Mostly Clear | 3 to 7 mph W | 0% |
| Monday | 51°F | Mostly Sunny | 5 mph WNW | 1% |
| Monday Night | 24°F | Partly Cloudy | 5 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Grand Lake, CO
Growing season
54 days
Hardiness zone
5a
Explore more for Grand Lake, CO: full frost dates · planting calendar · Colorado frost dates
Climate data from the nearest NOAA station, Grand Lake 1 Nw, Co (2.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.