| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 47f - Rolling Loess Prairies | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 52601 - Burlington, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 20 | 31 | 42 | 53 | 62 | 67 | 65 | 56 | 45 | 32 | 20 | 42 |
| Avg Max Temp (°F) | 31 | 37 | 49 | 62 | 72 | 82 | 86 | 83 | 76 | 65 | 49 | 35 | 61 |
| Avg Precip (In.) | 1.34 | 1.47 | 2.83 | 3.55 | 4.36 | 4.29 | 4.33 | 3.87 | 3.63 | 2.86 | 2.73 | 2.05 | 37.33 |