Blue Mounds, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.4 °F (low) to 55.6 °F (high). Annual precipitation averages 39.6 Inches. Blue Mounds is located in USDA Plant Hardiness Zone 5b. 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 | 10.3 °F | 25.6 °F | 1.53 in. |
| February | 14.2 °F | 30.1 °F | 1.55 in. |
| March | 24.6 °F | 42.3 °F | 2.1 in. |
| April | 35.6 °F | 56.4 °F | 4.01 in. |
| May | 47.5 °F | 68.1 °F | 4.65 in. |
| June | 57.4 °F | 77.4 °F | 6.02 in. |
| July | 61.8 °F | 80.9 °F | 4.54 in. |
| August | 60.0 °F | 79.4 °F | 4.47 in. |
| September | 51.5 °F | 72.2 °F | 3.72 in. |
| October | 39.8 °F | 59.5 °F | 2.94 in. |
| November | 28.3 °F | 44.1 °F | 2.3 in. |
| December | 17.3 °F | 31.3 °F | 1.76 in. |
| Annual | 37.4 °F | 55.6 °F | 39.59 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 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |