Princeton, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.4 °F (low) to 66 °F (high). Annual precipitation averages 48.7 Inches. Princeton is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.1 °F | 39.6 °F | 3.58 in. |
| February | 26.0 °F | 44.9 °F | 2.99 in. |
| March | 34.2 °F | 54.9 °F | 4.35 in. |
| April | 44.7 °F | 67.0 °F | 5.15 in. |
| May | 55.2 °F | 76.4 °F | 5.44 in. |
| June | 64.0 °F | 84.9 °F | 4.61 in. |
| July | 67.0 °F | 87.8 °F | 4.32 in. |
| August | 65.1 °F | 86.8 °F | 3.21 in. |
| September | 57.4 °F | 81.2 °F | 3.81 in. |
| October | 45.7 °F | 69.4 °F | 3.42 in. |
| November | 35.2 °F | 55.2 °F | 4.14 in. |
| December | 27.1 °F | 43.9 °F | 3.7 in. |
| Annual | 45.4 °F | 66 °F | 48.72 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |