Springfield, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 5.6 °C (low) to 17.6 °C (high). Annual precipitation averages 1012.5 Millimeters. Springfield is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.6 °C | 8.7 °C | 133.86 mm |
| February | 1.7 °C | 10.8 °C | 109.22 mm |
| March | 2.8 °C | 13.3 °C | 114.05 mm |
| April | 4.4 °C | 15.9 °C | 90.42 mm |
| May | 6.8 °C | 19.7 °C | 67.82 mm |
| June | 9.1 °C | 22.9 °C | 39.62 mm |
| July | 11 °C | 28.2 °C | 9.4 mm |
| August | 10.8 °C | 28.6 °C | 10.67 mm |
| September | 8.8 °C | 25.3 °C | 36.83 mm |
| October | 5.9 °C | 18.2 °C | 87.88 mm |
| November | 3.4 °C | 11.7 °C | 140.72 mm |
| December | 1.4 °C | 8.1 °C | 171.96 mm |
| Annual | 5.6 °C | 17.6 °C | 1012.45 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |