West Okoboji, Iowa has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.8 °F (low) to 55.6 °F (high). Annual precipitation averages 30.1 Inches. West Okoboji is located in USDA Plant Hardiness Zone 5a. 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 | 6.9 °F | 23.8 °F | 0.68 in. |
| February | 10.8 °F | 28.1 °F | 0.79 in. |
| March | 22.6 °F | 40.9 °F | 1.54 in. |
| April | 34.8 °F | 56.6 °F | 3.21 in. |
| May | 47.5 °F | 68.9 °F | 4.36 in. |
| June | 58.4 °F | 79.0 °F | 4.66 in. |
| July | 62.2 °F | 83.1 °F | 3.54 in. |
| August | 59.5 °F | 80.3 °F | 3.62 in. |
| September | 51.1 °F | 74.2 °F | 3.17 in. |
| October | 37.8 °F | 60.0 °F | 2.3 in. |
| November | 24.7 °F | 43.2 °F | 1.32 in. |
| December | 13.0 °F | 28.9 °F | 0.91 in. |
| Annual | 35.8 °F | 55.6 °F | 30.1 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 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 | Dfb - Humid Continental Mild Summer, Wet All Year |