Prien, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 15.1 °C (low) to 25.5 °C (high). Annual precipitation averages 1615.4 Millimeters. Prien is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.6 °C | 16.2 °C | 157.99 mm |
| February | 7.6 °C | 18.3 °C | 102.87 mm |
| March | 11 °C | 21.8 °C | 95.5 mm |
| April | 14.8 °C | 25.3 °C | 116.08 mm |
| May | 19.3 °C | 28.9 °C | 133.6 mm |
| June | 22.7 °C | 31.8 °C | 176.53 mm |
| July | 23.8 °C | 32.8 °C | 164.08 mm |
| August | 23.5 °C | 33.3 °C | 155.96 mm |
| September | 21 °C | 31.4 °C | 143.76 mm |
| October | 15.3 °C | 27.2 °C | 122.68 mm |
| November | 9.8 °C | 21.5 °C | 118.11 mm |
| December | 6.7 °C | 17.4 °C | 128.27 mm |
| Annual | 15.1 °C | 25.5 °C | 1615.43 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |