Norway, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.4 °C (low) to 11.7 °C (high). Annual precipitation averages 779.5 Millimeters. Norway is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.6 °C | -4.3 °C | 33.78 mm |
| February | -14.3 °C | -2.1 °C | 29.21 mm |
| March | -8.7 °C | 3.8 °C | 41.66 mm |
| April | -1.9 °C | 10.7 °C | 69.09 mm |
| May | 4.8 °C | 18.7 °C | 80.77 mm |
| June | 10.3 °C | 23.8 °C | 94.23 mm |
| July | 12.8 °C | 26.4 °C | 89.66 mm |
| August | 12 °C | 25.4 °C | 78.23 mm |
| September | 7.8 °C | 20.9 °C | 87.88 mm |
| October | 1.5 °C | 13.2 °C | 83.06 mm |
| November | -4.1 °C | 5 °C | 49.53 mm |
| December | -10.4 °C | -1.5 °C | 42.42 mm |
| Annual | -0.4 °C | 11.7 °C | 779.52 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |