Pittsburg, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.2 °F (low) to 72.7 °F (high). Annual precipitation averages 45.6 Inches. Pittsburg is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.7 °F | 51.2 °F | 2.55 in. |
| February | 32.3 °F | 55.4 °F | 2.54 in. |
| March | 40.6 °F | 63.9 °F | 3.75 in. |
| April | 48.8 °F | 72.3 °F | 4.61 in. |
| May | 59.0 °F | 79.1 °F | 5.99 in. |
| June | 67.7 °F | 87.4 °F | 4.7 in. |
| July | 71.2 °F | 92.7 °F | 3.6 in. |
| August | 69.9 °F | 93.1 °F | 2.95 in. |
| September | 62.4 °F | 86.1 °F | 4.01 in. |
| October | 50.6 °F | 74.8 °F | 4.2 in. |
| November | 40.1 °F | 63.5 °F | 3.41 in. |
| December | 31.4 °F | 53.3 °F | 3.29 in. |
| Annual | 50.2 °F | 72.7 °F | 45.6 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |