Archer, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 35.7 °F (low) to 56.6 °F (high). Annual precipitation averages 30.8 Inches. Archer 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 | 7.1 °F | 25.2 °F | 0.79 in. |
| February | 11.4 °F | 29.9 °F | 0.91 in. |
| March | 23.0 °F | 42.9 °F | 1.74 in. |
| April | 34.5 °F | 57.7 °F | 3.26 in. |
| May | 47.4 °F | 69.9 °F | 4.17 in. |
| June | 58.4 °F | 79.8 °F | 4.74 in. |
| July | 62.0 °F | 83.2 °F | 3.52 in. |
| August | 59.5 °F | 80.7 °F | 3.59 in. |
| September | 50.5 °F | 74.4 °F | 3.25 in. |
| October | 37.6 °F | 61.1 °F | 2.35 in. |
| November | 24.2 °F | 44.1 °F | 1.47 in. |
| December | 13.0 °F | 30.1 °F | 1.04 in. |
| Annual | 35.7 °F | 56.6 °F | 30.83 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |