Bangor, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 9.6 °C (low) to 23.5 °C (high). Annual precipitation averages 819.4 Millimeters. Bangor is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.8 °C | 13.4 °C | 146.81 mm |
| February | 5 °C | 15.6 °C | 141.99 mm |
| March | 6.2 °C | 18 °C | 127.25 mm |
| April | 7.6 °C | 20.8 °C | 67.06 mm |
| May | 10.8 °C | 25.8 °C | 37.59 mm |
| June | 14 °C | 30.7 °C | 12.7 mm |
| July | 16.7 °C | 34.6 °C | 0.76 mm |
| August | 16.1 °C | 34 °C | 1.02 mm |
| September | 14.2 °C | 31.6 °C | 4.32 mm |
| October | 10.4 °C | 25.8 °C | 40.39 mm |
| November | 6.4 °C | 18 °C | 86.61 mm |
| December | 3.7 °C | 13.2 °C | 152.91 mm |
| Annual | 9.6 °C | 23.5 °C | 819.41 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 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 | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |