| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 82e - Central Maine Embayment |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 04358 - South China, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 10 | 21 | 32 | 43 | 52 | 58 | 56 | 48 | 37 | 28 | 15 | 34 |
| Avg Max Temp (°F) | 29 | 32 | 41 | 53 | 66 | 75 | 80 | 78 | 70 | 58 | 46 | 34 | 55 |
| Avg Precip (In.) | 3.56 | 2.66 | 3.85 | 3.9 | 3.89 | 3.69 | 3.47 | 3.29 | 3.67 | 4.07 | 4.07 | 3.62 | 43.75 |