Timblin, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.5 °C (low) to 15.2 °C (high). Annual precipitation averages 1185.9 Millimeters. Timblin is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.8 °C | 1.3 °C | 93.47 mm |
| February | -7.4 °C | 2.9 °C | 69.85 mm |
| March | -3.6 °C | 7.9 °C | 95.76 mm |
| April | 2 °C | 15.7 °C | 104.65 mm |
| May | 7.8 °C | 21.5 °C | 102.11 mm |
| June | 12.7 °C | 25.4 °C | 120.14 mm |
| July | 14.8 °C | 27.4 °C | 117.6 mm |
| August | 14.2 °C | 27.1 °C | 105.66 mm |
| September | 10.3 °C | 23.3 °C | 104.39 mm |
| October | 4.3 °C | 16.6 °C | 85.85 mm |
| November | -0.8 °C | 9.7 °C | 94.23 mm |
| December | -4.7 °C | 3.7 °C | 92.2 mm |
| Annual | 3.5 °C | 15.2 °C | 1185.91 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |