Strathmore, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 9.9 °C (low) to 25.3 °C (high). Annual precipitation averages 283.2 Millimeters. Strathmore is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.2 °C | 14.1 °C | 54.86 mm |
| February | 4.6 °C | 17.1 °C | 48.51 mm |
| March | 6.5 °C | 20.5 °C | 48.01 mm |
| April | 8.2 °C | 23.8 °C | 28.45 mm |
| May | 11.8 °C | 28.7 °C | 11.68 mm |
| June | 15.2 °C | 33.3 °C | 2.79 mm |
| July | 18.3 °C | 36.3 °C | 0.51 mm |
| August | 17.5 °C | 35.8 °C | 0.51 mm |
| September | 14.9 °C | 33.2 °C | 2.03 mm |
| October | 10.3 °C | 27.1 °C | 12.95 mm |
| November | 5.4 °C | 19.3 °C | 25.15 mm |
| December | 2.4 °C | 14.1 °C | 47.75 mm |
| Annual | 9.9 °C | 25.3 °C | 283.2 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |