| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 4.5° | -0.4° | 51.3mm | 15.5 | 17 |
| February | 6.1° | 0° | 45.9mm | 13.3 | 26 |
| March | 9.4° | 1.2° | 43.1mm | 12.8 | 39 |
| April | 14.5° | 4° | 34.6mm | 10.9 | 61 |
| May | 18.7° | 7.8° | 52mm | 11.9 | 72 |
| June | 22.1° | 11.3° | 53.8mm | 11.7 | 77 |
| July | 23.9° | 13.3° | 70.1mm | 13.4 | 73 |
| August | 23.9° | 13.2° | 64.8mm | 12.6 | 75 |
| September | 19.8° | 10.1° | 54.2mm | 10.9 | 78 |
| October | 14.6° | 7° | 56.6mm | 13.1 | 57 |
| November | 8.7° | 3.4° | 51.4mm | 14.2 | 35 |
| December | 5.3° | 0.6° | 55.9mm | 15.5 | 21 |
January in Hannover averages a daily high of 4.5°C with nights around -0.4°C. Expect roughly 15.5 wet days totalling 51.3mm. A hard month to visit for comfort alone.
February in Hannover averages a daily high of 6.1°C with nights around 0°C. Expect roughly 13.3 wet days totalling 45.9mm. A hard month to visit for comfort alone.
March in Hannover averages a daily high of 9.4°C with nights around 1.2°C. Expect roughly 12.8 wet days totalling 43.1mm. Demanding conditions — pack for it and plan indoor options.
April in Hannover averages a daily high of 14.5°C with nights around 4°C. Expect roughly 10.9 wet days totalling 34.6mm. Generally workable, with some weather to plan around.
May in Hannover averages a daily high of 18.7°C with nights around 7.8°C. Expect roughly 11.9 wet days totalling 52mm. Generally workable, with some weather to plan around.
June in Hannover averages a daily high of 22.1°C with nights around 11.3°C. Expect roughly 11.7 wet days totalling 53.8mm. Comfortable conditions for being outdoors all day.
July in Hannover averages a daily high of 23.9°C with nights around 13.3°C. Expect roughly 13.4 wet days totalling 70.1mm. Generally workable, with some weather to plan around.
August in Hannover averages a daily high of 23.9°C with nights around 13.2°C. Expect roughly 12.6 wet days totalling 64.8mm. Comfortable conditions for being outdoors all day.
September in Hannover averages a daily high of 19.8°C with nights around 10.1°C. Expect roughly 10.9 wet days totalling 54.2mm. Comfortable conditions for being outdoors all day.
October in Hannover averages a daily high of 14.6°C with nights around 7°C. Expect roughly 13.1 wet days totalling 56.6mm. Generally workable, with some weather to plan around.
November in Hannover averages a daily high of 8.7°C with nights around 3.4°C. Expect roughly 14.2 wet days totalling 51.4mm. Demanding conditions — pack for it and plan indoor options.
December in Hannover averages a daily high of 5.3°C with nights around 0.6°C. Expect roughly 15.5 wet days totalling 55.9mm. A hard month to visit for comfort alone.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Hannover peaks at 78.
Based on 30 years of records, May–September scores highest for comfort in Hannover, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 23.9°C.
July is the wettest, averaging 70.1mm of rain across roughly 13.4 wet days.
January is the coolest month, with average daily highs around 4.5°C.