South Park, Wyoming has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 26 °F (low) to 53.7 °F (high). Annual precipitation averages 16.6 Inches. South Park is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Aug. 1 - Aug. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.4 °F | 28.2 °F | 1.62 in. |
| February | 9.7 °F | 32.3 °F | 1.36 in. |
| March | 17.9 °F | 41.5 °F | 1.18 in. |
| April | 26.2 °F | 51.0 °F | 1.16 in. |
| May | 33.5 °F | 61.9 °F | 1.89 in. |
| June | 39.7 °F | 71.6 °F | 1.66 in. |
| July | 44.5 °F | 81.7 °F | 0.97 in. |
| August | 42.8 °F | 80.5 °F | 1.07 in. |
| September | 35.6 °F | 71.0 °F | 1.48 in. |
| October | 27.5 °F | 56.2 °F | 1.24 in. |
| November | 18.0 °F | 39.8 °F | 1.31 in. |
| December | 8.6 °F | 28.3 °F | 1.67 in. |
| Annual | 26 °F | 53.7 °F | 16.61 in. |
| Average First Frost Date | Aug. 1 - Aug. 10 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°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 |