Lakeside, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 7.2 °C (low) to 15.6 °C (high). Annual precipitation averages 1698 Millimeters. Lakeside 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 Jan. 1 - Jan. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.3 °C | 11.7 °C | 255.52 mm |
| February | 4.2 °C | 12.3 °C | 201.17 mm |
| March | 4.7 °C | 12.8 °C | 209.3 mm |
| April | 5.8 °C | 13.9 °C | 151.89 mm |
| May | 7.9 °C | 15.9 °C | 94.74 mm |
| June | 9.9 °C | 18.1 °C | 55.37 mm |
| July | 11.2 °C | 19.7 °C | 12.19 mm |
| August | 11.1 °C | 20.1 °C | 14.48 mm |
| September | 9.8 °C | 20.1 °C | 43.69 mm |
| October | 7.9 °C | 17.2 °C | 119.89 mm |
| November | 5.7 °C | 13.7 °C | 239.27 mm |
| December | 4.1 °C | 11.3 °C | 300.48 mm |
| Annual | 7.2 °C | 15.6 °C | 1697.99 mm |
| Average First Frost Date | Jan. 1 - Jan. 10 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |