Templeton, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6 °C (low) to 24.2 °C (high). Annual precipitation averages 447.6 Millimeters. Templeton is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.7 °C | 16.5 °C | 103.63 mm |
| February | 2.7 °C | 17.5 °C | 95.76 mm |
| March | 4 °C | 19.5 °C | 78.99 mm |
| April | 4.8 °C | 22.6 °C | 25.4 mm |
| May | 7.1 °C | 25.3 °C | 10.67 mm |
| June | 9.4 °C | 29.6 °C | 1.78 mm |
| July | 11.4 °C | 31.6 °C | 1.52 mm |
| August | 11 °C | 32.6 °C | 0.51 mm |
| September | 9.5 °C | 31.2 °C | 2.29 mm |
| October | 6.4 °C | 27.1 °C | 17.78 mm |
| November | 3 °C | 20.7 °C | 34.04 mm |
| December | 0.9 °C | 16.2 °C | 75.18 mm |
| Annual | 6 °C | 24.2 °C | 447.55 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |