Carlos, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.7 °F (low) to 59.2 °F (high). Annual precipitation averages 44.8 Inches. Carlos is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.5 °F | 34.5 °F | 3.16 in. |
| February | 20.6 °F | 37.9 °F | 3.0 in. |
| March | 27.3 °F | 46.6 °F | 4.03 in. |
| April | 37.5 °F | 60.9 °F | 4.11 in. |
| May | 47.9 °F | 69.5 °F | 4.87 in. |
| June | 56.0 °F | 77.1 °F | 4.66 in. |
| July | 60.1 °F | 81.0 °F | 3.78 in. |
| August | 58.5 °F | 79.8 °F | 3.39 in. |
| September | 51.9 °F | 73.5 °F | 3.92 in. |
| October | 41.3 °F | 62.0 °F | 3.36 in. |
| November | 31.7 °F | 49.1 °F | 3.11 in. |
| December | 24.5 °F | 38.8 °F | 3.45 in. |
| Annual | 39.7 °F | 59.2 °F | 44.84 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |