Petersburg, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.7 °F (low) to 60.4 °F (high). Annual precipitation averages 27.4 Inches. Petersburg is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.9 °F | 33.2 °F | 0.54 in. |
| February | 15.4 °F | 37.4 °F | 0.74 in. |
| March | 24.7 °F | 48.8 °F | 1.46 in. |
| April | 35.1 °F | 60.0 °F | 2.87 in. |
| May | 46.6 °F | 70.6 °F | 4.18 in. |
| June | 57.7 °F | 81.1 °F | 4.07 in. |
| July | 62.3 °F | 85.2 °F | 3.19 in. |
| August | 59.9 °F | 83.0 °F | 3.73 in. |
| September | 50.4 °F | 76.6 °F | 2.51 in. |
| October | 37.0 °F | 63.7 °F | 2.26 in. |
| November | 24.4 °F | 48.4 °F | 1.13 in. |
| December | 15.4 °F | 36.3 °F | 0.76 in. |
| Annual | 36.7 °F | 60.4 °F | 27.44 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |