Point Roberts, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 45 °F (low) to 58 °F (high). Annual precipitation averages 36.4 Inches. Point Roberts is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 36.3 °F | 44.8 °F | 5.41 in. |
| February | 37.0 °F | 47.2 °F | 2.94 in. |
| March | 39.2 °F | 51.2 °F | 3.51 in. |
| April | 42.9 °F | 56.6 °F | 2.57 in. |
| May | 47.8 °F | 63.2 °F | 1.85 in. |
| June | 52.1 °F | 67.7 °F | 1.51 in. |
| July | 55.3 °F | 72.8 °F | 1.0 in. |
| August | 55.5 °F | 73.1 °F | 1.09 in. |
| September | 51.9 °F | 67.4 °F | 1.81 in. |
| October | 46.0 °F | 57.6 °F | 4.0 in. |
| November | 40.2 °F | 49.7 °F | 5.53 in. |
| December | 36.3 °F | 44.6 °F | 5.22 in. |
| Annual | 45 °F | 58 °F | 36.44 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |