Point Roberts, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 7.3 °C (low) to 14.4 °C (high). Annual precipitation averages 925.6 Millimeters. 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 | 2.4 °C | 7.1 °C | 137.41 mm |
| February | 2.8 °C | 8.4 °C | 74.68 mm |
| March | 4 °C | 10.7 °C | 89.15 mm |
| April | 6.1 °C | 13.7 °C | 65.28 mm |
| May | 8.8 °C | 17.3 °C | 46.99 mm |
| June | 11.2 °C | 19.8 °C | 38.35 mm |
| July | 12.9 °C | 22.7 °C | 25.4 mm |
| August | 13.1 °C | 22.8 °C | 27.69 mm |
| September | 11.1 °C | 19.7 °C | 45.97 mm |
| October | 7.8 °C | 14.2 °C | 101.6 mm |
| November | 4.6 °C | 9.8 °C | 140.46 mm |
| December | 2.4 °C | 7 °C | 132.59 mm |
| Annual | 7.3 °C | 14.4 °C | 925.57 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |