Noonan, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 28.1 °F (low) to 50.1 °F (high). Annual precipitation averages 17 Inches. Noonan is located in USDA Plant Hardiness Zone 4a. 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 | -1.0 °F | 17.3 °F | 0.53 in. |
| February | 2.7 °F | 21.8 °F | 0.43 in. |
| March | 14.6 °F | 33.7 °F | 0.66 in. |
| April | 27.9 °F | 51.9 °F | 0.98 in. |
| May | 39.9 °F | 64.8 °F | 2.43 in. |
| June | 50.6 °F | 72.9 °F | 3.58 in. |
| July | 54.7 °F | 79.2 °F | 2.74 in. |
| August | 52.4 °F | 79.8 °F | 1.68 in. |
| September | 43.0 °F | 69.4 °F | 1.57 in. |
| October | 30.4 °F | 53.0 °F | 1.2 in. |
| November | 16.7 °F | 34.6 °F | 0.66 in. |
| December | 4.7 °F | 22.2 °F | 0.55 in. |
| Annual | 28.1 °F | 50.1 °F | 17.01 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |