Medicine Bow, Wyoming has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 28.5 °F (low) to 56.9 °F (high). Annual precipitation averages 11.3 Inches. Medicine Bow 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 Aug. 21 - Aug. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.2 °F | 32.5 °F | 0.41 in. |
| February | 12.6 °F | 34.9 °F | 0.61 in. |
| March | 20.6 °F | 45.7 °F | 0.74 in. |
| April | 26.5 °F | 54.0 °F | 1.27 in. |
| May | 34.9 °F | 64.6 °F | 1.98 in. |
| June | 42.8 °F | 76.5 °F | 1.36 in. |
| July | 49.0 °F | 84.4 °F | 1.03 in. |
| August | 46.8 °F | 82.3 °F | 0.85 in. |
| September | 37.9 °F | 73.3 °F | 0.99 in. |
| October | 28.2 °F | 58.6 °F | 0.9 in. |
| November | 19.1 °F | 43.3 °F | 0.62 in. |
| December | 11.5 °F | 32.6 °F | 0.52 in. |
| Annual | 28.5 °F | 56.9 °F | 11.28 in. |
| Average First Frost Date | Aug. 21 - Aug. 31 |
| 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 4b : -25°F to -20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |