Havana, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.1 °F (low) to 52.6 °F (high). Annual precipitation averages 24 Inches. Havana is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.1 °F | 19.3 °F | 0.62 in. |
| February | 5.5 °F | 24.2 °F | 0.58 in. |
| March | 17.8 °F | 36.9 °F | 0.95 in. |
| April | 31.3 °F | 53.1 °F | 1.77 in. |
| May | 44.9 °F | 67.0 °F | 3.19 in. |
| June | 55.9 °F | 76.5 °F | 4.2 in. |
| July | 60.0 °F | 81.2 °F | 3.88 in. |
| August | 57.3 °F | 80.0 °F | 2.35 in. |
| September | 47.8 °F | 71.9 °F | 2.69 in. |
| October | 34.5 °F | 56.3 °F | 2.31 in. |
| November | 20.8 °F | 38.9 °F | 0.81 in. |
| December | 8.6 °F | 25.4 °F | 0.67 in. |
| Annual | 32.1 °F | 52.6 °F | 24.02 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |