Medicine Bow, Wyoming has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -2 °C (low) to 13.8 °C (high). Annual precipitation averages 286.5 Millimeters. 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 | -11 °C | 0.3 °C | 10.41 mm |
| February | -10.8 °C | 1.6 °C | 15.49 mm |
| March | -6.3 °C | 7.6 °C | 18.8 mm |
| April | -3.1 °C | 12.2 °C | 32.26 mm |
| May | 1.6 °C | 18.1 °C | 50.29 mm |
| June | 6 °C | 24.7 °C | 34.54 mm |
| July | 9.4 °C | 29.1 °C | 26.16 mm |
| August | 8.2 °C | 27.9 °C | 21.59 mm |
| September | 3.3 °C | 22.9 °C | 25.15 mm |
| October | -2.1 °C | 14.8 °C | 22.86 mm |
| November | -7.2 °C | 6.3 °C | 15.75 mm |
| December | -11.4 °C | 0.3 °C | 13.21 mm |
| Annual | -2 °C | 13.8 °C | 286.51 mm |
| 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 : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |