| 2023 Hardiness Zone: | 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. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 53d - Lake Michigan Lacustrine Clay Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 54901 - Oshkosh, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 12 | 23 | 35 | 47 | 57 | 62 | 59 | 50 | 40 | 27 | 14 | 36 |
| Avg Max Temp (°F) | 24 | 29 | 40 | 54 | 68 | 77 | 82 | 79 | 71 | 59 | 43 | 29 | 55 |
| Avg Precip (In.) | 1.33 | 1.09 | 2.14 | 2.91 | 3.04 | 3.69 | 3.62 | 4.15 | 3.46 | 2.25 | 2.45 | 1.51 | 31.66 |