Holiday Lake, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.1 °F (low) to 58.7 °F (high). Annual precipitation averages 36.9 Inches. Holiday Lake is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.8 °F | 27.9 °F | 1.1 in. |
| February | 14.4 °F | 32.8 °F | 1.32 in. |
| March | 25.8 °F | 45.9 °F | 2.11 in. |
| April | 37.0 °F | 59.8 °F | 3.65 in. |
| May | 49.3 °F | 71.2 °F | 4.74 in. |
| June | 60.2 °F | 81.1 °F | 5.43 in. |
| July | 63.4 °F | 84.4 °F | 4.24 in. |
| August | 60.5 °F | 82.5 °F | 4.25 in. |
| September | 51.5 °F | 75.8 °F | 3.58 in. |
| October | 39.6 °F | 62.5 °F | 2.85 in. |
| November | 27.5 °F | 46.8 °F | 2.08 in. |
| December | 17.3 °F | 33.7 °F | 1.52 in. |
| Annual | 38.1 °F | 58.7 °F | 36.87 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°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 |