Glenwood, New Mexico has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 4.8 °C (low) to 23.8 °C (high). Annual precipitation averages 425.2 Millimeters. Glenwood is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.2 °C | 13.6 °C | 34.8 mm |
| February | -2.6 °C | 15.3 °C | 28.45 mm |
| March | -0.2 °C | 18.8 °C | 26.67 mm |
| April | 2.4 °C | 23.6 °C | 9.14 mm |
| May | 6.7 °C | 28.1 °C | 14.48 mm |
| June | 11.9 °C | 33.4 °C | 16.51 mm |
| July | 16 °C | 33.3 °C | 77.22 mm |
| August | 15.7 °C | 32.1 °C | 71.63 mm |
| September | 11.6 °C | 29.6 °C | 55.88 mm |
| October | 5.2 °C | 25.1 °C | 30.99 mm |
| November | -0.7 °C | 18.6 °C | 22.35 mm |
| December | -4 °C | 13.6 °C | 37.08 mm |
| Annual | 4.8 °C | 23.8 °C | 425.2 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |