Maupin, Oregon has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 4.5 °C (low) to 18.9 °C (high). Annual precipitation averages 309.9 Millimeters. Maupin is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2 °C | 6.6 °C | 45.72 mm |
| February | -1.4 °C | 9.4 °C | 37.59 mm |
| March | 0.4 °C | 13.7 °C | 27.43 mm |
| April | 2.9 °C | 18.1 °C | 24.13 mm |
| May | 6.9 °C | 23 °C | 24.13 mm |
| June | 10.1 °C | 26.9 °C | 13.97 mm |
| July | 13.6 °C | 32.6 °C | 5.08 mm |
| August | 12.9 °C | 32.6 °C | 5.84 mm |
| September | 9.2 °C | 27.9 °C | 8.38 mm |
| October | 4 °C | 19.7 °C | 23.37 mm |
| November | 0.1 °C | 10.9 °C | 41.15 mm |
| December | -2.3 °C | 5.9 °C | 53.09 mm |
| Annual | 4.5 °C | 18.9 °C | 309.88 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |