Westgate, Iowa has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.4 °F (low) to 56.3 °F (high). Annual precipitation averages 37.6 Inches. Westgate 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 | 8.2 °F | 25.3 °F | 1.12 in. |
| February | 12.0 °F | 29.5 °F | 1.16 in. |
| March | 24.0 °F | 42.8 °F | 1.95 in. |
| April | 35.6 °F | 57.5 °F | 3.79 in. |
| May | 47.7 °F | 69.5 °F | 4.73 in. |
| June | 58.6 °F | 79.2 °F | 5.84 in. |
| July | 61.5 °F | 81.8 °F | 4.92 in. |
| August | 59.1 °F | 79.8 °F | 4.13 in. |
| September | 50.5 °F | 74.1 °F | 3.73 in. |
| October | 38.1 °F | 60.9 °F | 2.78 in. |
| November | 26.0 °F | 44.4 °F | 1.88 in. |
| December | 14.9 °F | 31.0 °F | 1.55 in. |
| Annual | 36.4 °F | 56.3 °F | 37.58 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |