Prairieville, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 57.9 °F (low) to 78.5 °F (high). Annual precipitation averages 65.2 Inches. Prairieville is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 41.6 °F | 62.1 °F | 5.89 in. |
| February | 44.8 °F | 66.1 °F | 4.7 in. |
| March | 50.9 °F | 72.6 °F | 4.54 in. |
| April | 56.7 °F | 78.5 °F | 5.34 in. |
| May | 64.9 °F | 85.1 °F | 5.96 in. |
| June | 71.2 °F | 89.6 °F | 6.9 in. |
| July | 73.4 °F | 91.3 °F | 6.06 in. |
| August | 72.9 °F | 91.7 °F | 6.86 in. |
| September | 68.8 °F | 88.4 °F | 5.02 in. |
| October | 58.2 °F | 80.8 °F | 4.57 in. |
| November | 48.2 °F | 71.0 °F | 4.15 in. |
| December | 43.3 °F | 64.4 °F | 5.24 in. |
| Annual | 57.9 °F | 78.5 °F | 65.23 in. |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |