| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F | |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 47c - Iowan Surface | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 50676 - Tripoli, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 5 | 11 | 23 | 36 | 47 | 57 | 61 | 59 | 49 | 38 | 25 | 11 | 35 |
| Avg Max Temp (°F) | 23 | 30 | 42 | 57 | 70 | 80 | 83 | 81 | 73 | 61 | 42 | 28 | 56 |
| Avg Precip (In.) | 1 | .95 | 2.14 | 3.67 | 4.37 | 4.86 | 4.48 | 5.06 | 3.2 | 2.58 | 2.35 | 1.26 | 35.92 |