Rio Rico, Arizona has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 8.6 °C (low) to 27.1 °C (high). Annual precipitation averages 385.1 Millimeters. 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 | 0.1 °C | 18.4 °C | 25.15 mm |
| February | 1.3 °C | 19.6 °C | 23.88 mm |
| March | 3.8 °C | 22.8 °C | 18.29 mm |
| April | 6.1 °C | 26.3 °C | 9.14 mm |
| May | 10.1 °C | 30.8 °C | 3.56 mm |
| June | 15.7 °C | 35.8 °C | 9.91 mm |
| July | 19.6 °C | 34.9 °C | 93.47 mm |
| August | 18.9 °C | 33.8 °C | 91.95 mm |
| September | 15.7 °C | 32.6 °C | 43.18 mm |
| October | 8.9 °C | 28.6 °C | 19.56 mm |
| November | 3.6 °C | 23 °C | 16.51 mm |
| December | -0.3 °C | 18 °C | 30.48 mm |
| Annual | 8.6 °C | 27.1 °C | 385.08 mm |
| 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 : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |