Frannie, Wyoming has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 32 °F (low) to 59.5 °F (high). Annual precipitation averages 7.7 Inches. Frannie is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.8 °F | 33.1 °F | 0.22 in. |
| February | 13.2 °F | 37.6 °F | 0.29 in. |
| March | 23.1 °F | 50.1 °F | 0.34 in. |
| April | 31.3 °F | 58.4 °F | 0.86 in. |
| May | 41.2 °F | 67.9 °F | 1.33 in. |
| June | 49.4 °F | 78.9 °F | 1.24 in. |
| July | 55.6 °F | 88.3 °F | 0.87 in. |
| August | 53.1 °F | 86.6 °F | 0.44 in. |
| September | 43.6 °F | 75.1 °F | 0.86 in. |
| October | 32.0 °F | 59.3 °F | 0.76 in. |
| November | 20.5 °F | 44.8 °F | 0.28 in. |
| December | 11.4 °F | 34.1 °F | 0.22 in. |
| Annual | 32 °F | 59.5 °F | 7.71 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BWk - Cold Desert Climate |