Regina, New Mexico has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.7 °C (low) to 17 °C (high). Annual precipitation averages 403.4 Millimeters. Regina is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.3 °C | 5.3 °C | 30.23 mm |
| February | -9.3 °C | 6.9 °C | 26.42 mm |
| March | -5.7 °C | 11.3 °C | 29.46 mm |
| April | -3.4 °C | 15.9 °C | 27.94 mm |
| May | 1.1 °C | 21.3 °C | 23.11 mm |
| June | 5.7 °C | 27.7 °C | 17.78 mm |
| July | 9.5 °C | 29.4 °C | 56.9 mm |
| August | 9.1 °C | 27.8 °C | 61.98 mm |
| September | 4.6 °C | 24.3 °C | 45.21 mm |
| October | -1.9 °C | 18 °C | 27.18 mm |
| November | -7.1 °C | 10.8 °C | 28.19 mm |
| December | -11.3 °C | 5.4 °C | 28.96 mm |
| Annual | -1.7 °C | 17 °C | 403.36 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |