Franklin, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 34.5 °F (low) to 54.7 °F (high). Annual precipitation averages 30.1 Inches. Franklin is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.6 °F | 22.3 °F | 0.74 in. |
| February | 8.4 °F | 26.9 °F | 0.82 in. |
| March | 20.9 °F | 39.1 °F | 1.58 in. |
| April | 33.7 °F | 55.5 °F | 2.84 in. |
| May | 46.6 °F | 68.8 °F | 4.04 in. |
| June | 57.7 °F | 78.6 °F | 4.85 in. |
| July | 61.2 °F | 82.5 °F | 3.59 in. |
| August | 58.5 °F | 80.2 °F | 3.92 in. |
| September | 49.6 °F | 73.5 °F | 3.1 in. |
| October | 37.0 °F | 59.1 °F | 2.37 in. |
| November | 23.9 °F | 41.8 °F | 1.25 in. |
| December | 11.6 °F | 27.6 °F | 1.04 in. |
| Annual | 34.5 °F | 54.7 °F | 30.14 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |