Menlo Park, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 49.2 °F (low) to 69.5 °F (high). Annual precipitation averages 17.8 Inches. Menlo Park 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 | 42.0 °F | 58.6 °F | 3.51 in. |
| February | 43.8 °F | 61.4 °F | 3.75 in. |
| March | 45.7 °F | 64.5 °F | 2.57 in. |
| April | 47.4 °F | 67.8 °F | 1.26 in. |
| May | 50.9 °F | 71.8 °F | 0.47 in. |
| June | 53.7 °F | 76.7 °F | 0.13 in. |
| July | 56.2 °F | 78.6 °F | 0.0 in. |
| August | 56.4 °F | 78.7 °F | 0.03 in. |
| September | 55.3 °F | 78.5 °F | 0.07 in. |
| October | 51.5 °F | 73.9 °F | 0.71 in. |
| November | 45.7 °F | 64.7 °F | 1.65 in. |
| December | 41.7 °F | 58.6 °F | 3.61 in. |
| Annual | 49.2 °F | 69.5 °F | 17.76 in. |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | Frost Rare |
| 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 | Csb - Warm-Summer Mediterranean Climate |