| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 4.3° | -0.2° | 73.3mm | 17.4 | 16 |
| February | 6° | 0.4° | 66.6mm | 15.5 | 23 |
| March | 9.4° | 2° | 56.1mm | 14.4 | 37 |
| April | 14.3° | 4.8° | 45.7mm | 11.6 | 59 |
| May | 18.3° | 8.3° | 62.8mm | 13.1 | 68 |
| June | 21.6° | 11.4° | 72.6mm | 12.6 | 75 |
| July | 23.3° | 13.3° | 80.2mm | 14.6 | 71 |
| August | 23.4° | 13.5° | 81mm | 13.2 | 74 |
| September | 19.4° | 10.5° | 68.5mm | 11.7 | 75 |
| October | 14.3° | 7.3° | 65.1mm | 14.5 | 53 |
| November | 8.6° | 3.6° | 64.3mm | 16.3 | 34 |
| December | 5.1° | 0.8° | 74.3mm | 18.4 | 21 |
January in Bielefeld averages a daily high of 4.3°C with nights around -0.2°C. Expect roughly 17.4 wet days totalling 73.3mm. A hard month to visit for comfort alone.
February in Bielefeld averages a daily high of 6°C with nights around 0.4°C. Expect roughly 15.5 wet days totalling 66.6mm. A hard month to visit for comfort alone.
March in Bielefeld averages a daily high of 9.4°C with nights around 2°C. Expect roughly 14.4 wet days totalling 56.1mm. Demanding conditions — pack for it and plan indoor options.
April in Bielefeld averages a daily high of 14.3°C with nights around 4.8°C. Expect roughly 11.6 wet days totalling 45.7mm. Generally workable, with some weather to plan around.
May in Bielefeld averages a daily high of 18.3°C with nights around 8.3°C. Expect roughly 13.1 wet days totalling 62.8mm. Generally workable, with some weather to plan around.
June in Bielefeld averages a daily high of 21.6°C with nights around 11.4°C. Expect roughly 12.6 wet days totalling 72.6mm. Comfortable conditions for being outdoors all day.
July in Bielefeld averages a daily high of 23.3°C with nights around 13.3°C. Expect roughly 14.6 wet days totalling 80.2mm. Generally workable, with some weather to plan around.
August in Bielefeld averages a daily high of 23.4°C with nights around 13.5°C. Expect roughly 13.2 wet days totalling 81mm. Generally workable, with some weather to plan around.
September in Bielefeld averages a daily high of 19.4°C with nights around 10.5°C. Expect roughly 11.7 wet days totalling 68.5mm. Comfortable conditions for being outdoors all day.
October in Bielefeld averages a daily high of 14.3°C with nights around 7.3°C. Expect roughly 14.5 wet days totalling 65.1mm. Demanding conditions — pack for it and plan indoor options.
November in Bielefeld averages a daily high of 8.6°C with nights around 3.6°C. Expect roughly 16.3 wet days totalling 64.3mm. A hard month to visit for comfort alone.
December in Bielefeld averages a daily high of 5.1°C with nights around 0.8°C. Expect roughly 18.4 wet days totalling 74.3mm. 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. Bielefeld peaks at 75.
Based on 30 years of records, May–September scores highest for comfort in Bielefeld, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 23.4°C.
August is the wettest, averaging 81mm of rain across roughly 13.2 wet days.
January is the coolest month, with average daily highs around 4.3°C.