| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Aug. 11 - Aug. 20 |
| Average Last Frost Date: | Jul. 1 - Jul. 10 |
| Koppen-Geiger Climate Zone: | Dsb - Humid Continental Climate - Dry Cool Summer |
| Ecoregion: | 12f - Semiarid Foothills |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 83643 - Mesa, ID | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 20 | 27 | 34 | 41 | 48 | 54 | 53 | 44 | 34 | 27 | 18 | 35 |
| Avg Max Temp (°F) | 33 | 40 | 51 | 61 | 71 | 80 | 90 | 90 | 78 | 65 | 46 | 35 | 62 |
| Avg Precip (In.) | 3.34 | 3.04 | 2.68 | 1.95 | 2.03 | 1.47 | .61 | .59 | 1.11 | 1.57 | 3.29 | 3.51 | 25.21 |