Elgin, Oregon has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 1.6 °C (low) to 16.5 °C (high). Annual precipitation averages 603.5 Millimeters. Elgin is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.3 °C | 3.8 °C | 80.77 mm |
| February | -3.4 °C | 6.6 °C | 59.69 mm |
| March | -1.5 °C | 11.1 °C | 53.59 mm |
| April | 0.6 °C | 15.1 °C | 53.59 mm |
| May | 4.1 °C | 20.1 °C | 57.66 mm |
| June | 6.9 °C | 24.2 °C | 42.42 mm |
| July | 9.3 °C | 30.5 °C | 12.45 mm |
| August | 8.6 °C | 30.8 °C | 12.7 mm |
| September | 4.8 °C | 25.6 °C | 21.34 mm |
| October | 0.7 °C | 17.3 °C | 50.29 mm |
| November | -1.8 °C | 8.6 °C | 66.29 mm |
| December | -4.6 °C | 3.7 °C | 92.71 mm |
| Annual | 1.6 °C | 16.5 °C | 603.5 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |