Rio Rico, Arizona has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 47.5 °F (low) to 80.7 °F (high). Annual precipitation averages 15.2 Inches. Rio Rico is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 32.2 °F | 65.1 °F | 0.99 in. |
| February | 34.4 °F | 67.2 °F | 0.94 in. |
| March | 38.8 °F | 73.0 °F | 0.72 in. |
| April | 43.0 °F | 79.3 °F | 0.36 in. |
| May | 50.2 °F | 87.4 °F | 0.14 in. |
| June | 60.2 °F | 96.5 °F | 0.39 in. |
| July | 67.3 °F | 94.8 °F | 3.68 in. |
| August | 66.1 °F | 92.9 °F | 3.62 in. |
| September | 60.2 °F | 90.6 °F | 1.7 in. |
| October | 48.0 °F | 83.5 °F | 0.77 in. |
| November | 38.4 °F | 73.4 °F | 0.65 in. |
| December | 31.5 °F | 64.4 °F | 1.2 in. |
| Annual | 47.5 °F | 80.7 °F | 15.16 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |