Morrison, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.3 °F (low) to 71.7 °F (high). Annual precipitation averages 37.2 Inches. Morrison is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.3 °F | 48.8 °F | 1.3 in. |
| February | 27.7 °F | 52.6 °F | 1.51 in. |
| March | 36.8 °F | 62.4 °F | 2.73 in. |
| April | 45.8 °F | 71.5 °F | 3.97 in. |
| May | 56.6 °F | 79.2 °F | 5.09 in. |
| June | 66.4 °F | 87.9 °F | 4.7 in. |
| July | 70.4 °F | 93.3 °F | 3.62 in. |
| August | 68.6 °F | 93.1 °F | 3.46 in. |
| September | 60.3 °F | 85.5 °F | 3.66 in. |
| October | 47.8 °F | 73.9 °F | 3.53 in. |
| November | 36.1 °F | 61.6 °F | 2.01 in. |
| December | 26.9 °F | 50.1 °F | 1.65 in. |
| Annual | 47.3 °F | 71.7 °F | 37.23 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |