| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Aug. 1 - Aug. 10 |
| Average Last Frost Date: | Jul. 11 - Jul. 20 |
| Koppen-Geiger Climate Zone: | Dfc - Subarctic With Cool Summers And Year Around Rainfall |
| Ecoregion: | 21f - Sedimentary Mid-Elevation Forests and Shrublands |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 80447 - Grand Lake, CO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 3 | 5 | 12 | 19 | 28 | 35 | 40 | 39 | 32 | 24 | 13 | 5 | 21 |
| Avg Max Temp (°F) | 29 | 34 | 40 | 47 | 58 | 68 | 74 | 72 | 65 | 54 | 38 | 30 | 51 |
| Avg Precip (In.) | 1.23 | 1.3 | 1.06 | 1.45 | 1.68 | 1.34 | 1.83 | 1.76 | 1.42 | 1.16 | 1.03 | 1.33 | 16.59 |