Silo, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11 °C (low) to 23.3 °C (high). Annual precipitation averages 1111.3 Millimeters. Silo is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.6 °C | 11.6 °C | 59.94 mm |
| February | 1.4 °C | 13.7 °C | 63.5 mm |
| March | 5.7 °C | 18.4 °C | 94.74 mm |
| April | 10.1 °C | 22.8 °C | 101.35 mm |
| May | 15.5 °C | 26.9 °C | 150.62 mm |
| June | 20.3 °C | 31.7 °C | 117.35 mm |
| July | 22.3 °C | 34.5 °C | 79.25 mm |
| August | 21.9 °C | 34.7 °C | 69.85 mm |
| September | 17.9 °C | 30.6 °C | 100.08 mm |
| October | 11.4 °C | 24.6 °C | 109.22 mm |
| November | 5.5 °C | 18.1 °C | 83.06 mm |
| December | 0.6 °C | 12.4 °C | 82.3 mm |
| Annual | 11 °C | 23.3 °C | 1111.26 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |