Steglitz-Zehlendorf boasts a year-around average temperature of 9.2°C, peaking at 18.4°C in July, its warmest month, and dipping to an average low of -0.5°C in January, the coolest. Rainfall averages at 2.7mm annually, with July seeing the heaviest showers and March, April, November being the driest month.
Month | Temperature (Celcius) | Rainfall (mm) |
| January | -0.5 | 3.0 |
| February | 0.0 | 2.0 |
| March | 4.0 | 1.5 |
| April | 9.2 | 1.5 |
| May | 13.7 | 3.6 |
| June | 17.0 | 2.5 |
| July | 18.4 | 5.1 |
| August | 18.1 | 4.1 |
| September | 14.9 | 1.8 |
| October | 9.8 | 2.5 |
| November | 4.8 | 1.5 |
| December | 1.1 | 3.3 |