Generally, average daily wearther in Cologne throughout the time of December is 4 with highs being 5 degrees and a low of 2. The table below has further info:
| Month | Degrees Celsius |
|---|---|
| Temperature | 4 |
| High Temperature | 5 |
| Low Temperature | 2 |
| Sunshine Per Day | 2 |
Useful Links: Cologne Weather: Average Weather & Yearly Climate