Top-of-the-World, Arizona has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 8.1 °C (low) to 23.5 °C (high). Annual precipitation averages 595.6 Millimeters. Top-of-the-World is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.5 °C | 13.3 °C | 91.95 mm |
| February | 0.5 °C | 14.6 °C | 74.68 mm |
| March | 2.8 °C | 18.1 °C | 71.88 mm |
| April | 5.8 °C | 22.4 °C | 21.84 mm |
| May | 10.2 °C | 27.3 °C | 10.41 mm |
| June | 15.4 °C | 32.9 °C | 4.57 mm |
| July | 18.6 °C | 33.9 °C | 55.12 mm |
| August | 17.8 °C | 32.9 °C | 68.83 mm |
| September | 14.9 °C | 30.4 °C | 39.62 mm |
| October | 8.9 °C | 25.1 °C | 36.32 mm |
| November | 3.3 °C | 18.2 °C | 44.45 mm |
| December | -0.5 °C | 12.8 °C | 75.95 mm |
| Annual | 8.1 °C | 23.5 °C | 595.62 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 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 | Severe Drought |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |