Baldwin, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 15.1 °C (low) to 25.3 °C (high). Annual precipitation averages 1640.8 Millimeters. Baldwin is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.1 °C | 16.6 °C | 142.24 mm |
| February | 8.1 °C | 18.6 °C | 104.39 mm |
| March | 11.3 °C | 21.9 °C | 99.06 mm |
| April | 14.7 °C | 25.2 °C | 116.84 mm |
| May | 19.1 °C | 28.6 °C | 120.65 mm |
| June | 22.3 °C | 31.2 °C | 178.56 mm |
| July | 23.4 °C | 32 °C | 199.64 mm |
| August | 23.1 °C | 32.3 °C | 195.07 mm |
| September | 20.9 °C | 30.7 °C | 138.68 mm |
| October | 15.4 °C | 26.7 °C | 113.79 mm |
| November | 9.8 °C | 21.6 °C | 110.74 mm |
| December | 7.1 °C | 17.9 °C | 121.16 mm |
| Annual | 15.1 °C | 25.3 °C | 1640.82 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| 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 |