Tolani Lake, Arizona has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 3.9 °C (low) to 22.3 °C (high). Annual precipitation averages 185.7 Millimeters. Tolani Lake is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.3 °C | 9.8 °C | 13.72 mm |
| February | -4.2 °C | 13.1 °C | 12.95 mm |
| March | -1.2 °C | 17.7 °C | 13.97 mm |
| April | 2.2 °C | 21.5 °C | 9.4 mm |
| May | 6.9 °C | 26.6 °C | 7.11 mm |
| June | 11.6 °C | 32.8 °C | 4.32 mm |
| July | 16.3 °C | 34.6 °C | 28.19 mm |
| August | 15.7 °C | 33.1 °C | 26.16 mm |
| September | 11 °C | 29.6 °C | 25.91 mm |
| October | 3.6 °C | 23.1 °C | 17.27 mm |
| November | -2.7 °C | 15.9 °C | 11.68 mm |
| December | -6.7 °C | 9.5 °C | 14.99 mm |
| Annual | 3.9 °C | 22.3 °C | 185.67 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |