Flasher, North Dakota has a Humid Continental Mild Summer With Dry Winters climate (Köppen classification: Dwb). Average annual temperatures range from 30.7 °F (low) to 54.4 °F (high). Annual precipitation averages 17.8 Inches. Flasher 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 | 3.5 °F | 23.4 °F | 0.48 in. |
| February | 7.7 °F | 27.8 °F | 0.52 in. |
| March | 18.3 °F | 40.1 °F | 0.58 in. |
| April | 29.4 °F | 54.7 °F | 1.27 in. |
| May | 41.4 °F | 66.7 °F | 2.67 in. |
| June | 51.9 °F | 76.1 °F | 3.31 in. |
| July | 57.1 °F | 83.2 °F | 3.04 in. |
| August | 54.9 °F | 82.7 °F | 2.01 in. |
| September | 45.1 °F | 72.8 °F | 1.55 in. |
| October | 31.9 °F | 56.6 °F | 1.33 in. |
| November | 18.8 °F | 40.3 °F | 0.65 in. |
| December | 8.4 °F | 27.8 °F | 0.43 in. |
| Annual | 30.7 °F | 54.4 °F | 17.84 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 4a : -30°F to -25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dwb - Humid Continental Mild Summer With Dry Winters |