Archer, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.1 °C (low) to 13.7 °C (high). Annual precipitation averages 783.1 Millimeters. 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 | -13.8 °C | -3.8 °C | 20.07 mm |
| February | -11.4 °C | -1.2 °C | 23.11 mm |
| March | -5 °C | 6.1 °C | 44.2 mm |
| April | 1.4 °C | 14.3 °C | 82.8 mm |
| May | 8.6 °C | 21.1 °C | 105.92 mm |
| June | 14.7 °C | 26.6 °C | 120.4 mm |
| July | 16.7 °C | 28.4 °C | 89.41 mm |
| August | 15.3 °C | 27.1 °C | 91.19 mm |
| September | 10.3 °C | 23.6 °C | 82.55 mm |
| October | 3.1 °C | 16.2 °C | 59.69 mm |
| November | -4.3 °C | 6.7 °C | 37.34 mm |
| December | -10.6 °C | -1.1 °C | 26.42 mm |
| Annual | 2.1 °C | 13.7 °C | 783.1 mm |
| 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 : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |