Burr Oak, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 34.2 °F (low) to 54.2 °F (high). Annual precipitation averages 36.8 Inches. Burr Oak is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.9 °F | 23.4 °F | 1.02 in. |
| February | 9.5 °F | 27.8 °F | 1.06 in. |
| March | 21.6 °F | 40.6 °F | 1.84 in. |
| April | 33.2 °F | 55.2 °F | 3.85 in. |
| May | 45.6 °F | 67.2 °F | 4.65 in. |
| June | 56.2 °F | 76.7 °F | 6.17 in. |
| July | 59.6 °F | 80.2 °F | 4.34 in. |
| August | 56.8 °F | 78.2 °F | 4.34 in. |
| September | 48.6 °F | 71.8 °F | 3.59 in. |
| October | 36.3 °F | 58.2 °F | 2.77 in. |
| November | 24.5 °F | 42.4 °F | 1.81 in. |
| December | 13.1 °F | 29.2 °F | 1.35 in. |
| Annual | 34.2 °F | 54.2 °F | 36.79 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |