Stratford, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.4 °F (low) to 53 °F (high). Annual precipitation averages 32.1 Inches. Stratford is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.3 °F | 22.7 °F | 0.99 in. |
| February | 7.8 °F | 27.0 °F | 0.89 in. |
| March | 19.3 °F | 39.1 °F | 1.55 in. |
| April | 32.1 °F | 53.3 °F | 2.87 in. |
| May | 44.8 °F | 66.1 °F | 3.72 in. |
| June | 54.8 °F | 75.3 °F | 4.94 in. |
| July | 58.4 °F | 79.8 °F | 3.53 in. |
| August | 56.3 °F | 77.7 °F | 3.86 in. |
| September | 48.1 °F | 70.1 °F | 3.87 in. |
| October | 36.1 °F | 56.3 °F | 2.83 in. |
| November | 24.8 °F | 40.9 °F | 1.77 in. |
| December | 12.7 °F | 27.9 °F | 1.27 in. |
| Annual | 33.4 °F | 53 °F | 32.09 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |