London, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 49.8 °F (low) to 76.5 °F (high). Annual precipitation averages 11.2 Inches. London is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 38.0 °F | 56.2 °F | 2.27 in. |
| February | 40.5 °F | 62.0 °F | 1.93 in. |
| March | 43.9 °F | 68.3 °F | 1.96 in. |
| April | 47.1 °F | 73.8 °F | 1.07 in. |
| May | 53.7 °F | 82.3 °F | 0.45 in. |
| June | 59.3 °F | 90.6 °F | 0.14 in. |
| July | 64.7 °F | 96.2 °F | 0.02 in. |
| August | 62.9 °F | 95.7 °F | 0.01 in. |
| September | 58.4 °F | 90.4 °F | 0.06 in. |
| October | 50.5 °F | 79.4 °F | 0.52 in. |
| November | 41.7 °F | 66.2 °F | 0.96 in. |
| December | 36.6 °F | 56.3 °F | 1.84 in. |
| Annual | 49.8 °F | 76.5 °F | 11.23 in. |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |