| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F | |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| 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: | 47i - Loess and Glacial Drift Hills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 68358 - Firth, NE | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 19 | 29 | 40 | 50 | 60 | 65 | 63 | 54 | 42 | 29 | 18 | 40 |
| Avg Max Temp (°F) | 34 | 41 | 53 | 65 | 74 | 85 | 89 | 87 | 79 | 68 | 50 | 38 | 64 |
| Avg Precip (In.) | .68 | .73 | 2.48 | 2.93 | 4.52 | 3.65 | 4.33 | 3.31 | 3.07 | 2.29 | 1.78 | .95 | 30.72 |