Goldfield, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.6 °F (low) to 56.8 °F (high). Annual precipitation averages 35.2 Inches. Goldfield 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.3 °F | 25.5 °F | 0.84 in. |
| February | 12.4 °F | 29.9 °F | 1.03 in. |
| March | 24.4 °F | 42.9 °F | 2.05 in. |
| April | 35.6 °F | 58.2 °F | 3.82 in. |
| May | 48.3 °F | 70.0 °F | 5.01 in. |
| June | 59.2 °F | 80.0 °F | 5.49 in. |
| July | 62.4 °F | 82.8 °F | 4.26 in. |
| August | 59.5 °F | 80.6 °F | 4.24 in. |
| September | 50.5 °F | 74.8 °F | 3.13 in. |
| October | 38.0 °F | 61.5 °F | 2.38 in. |
| November | 25.7 °F | 44.8 °F | 1.67 in. |
| December | 14.6 °F | 30.9 °F | 1.28 in. |
| Annual | 36.6 °F | 56.8 °F | 35.2 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 |