Olla, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12 °C (low) to 25.2 °C (high). Annual precipitation averages 1528.6 Millimeters. Olla is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.3 °C | 14.7 °C | 152.15 mm |
| February | 3.7 °C | 16.9 °C | 132.84 mm |
| March | 7.5 °C | 21.4 °C | 143.26 mm |
| April | 11.4 °C | 25.3 °C | 148.08 mm |
| May | 16.4 °C | 29.3 °C | 125.98 mm |
| June | 20.3 °C | 32.3 °C | 121.92 mm |
| July | 21.8 °C | 33.9 °C | 114.3 mm |
| August | 21.3 °C | 34.4 °C | 93.73 mm |
| September | 18.1 °C | 31.6 °C | 96.52 mm |
| October | 11.9 °C | 26.6 °C | 117.09 mm |
| November | 6.4 °C | 20.2 °C | 136.14 mm |
| December | 3.2 °C | 15.7 °C | 146.56 mm |
| Annual | 12 °C | 25.2 °C | 1528.57 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |