| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 5.8° | 0.3° | 35.4mm | 13.9 | 24 |
| February | 7.6° | 1° | 37.8mm | 12.9 | 33 |
| March | 11.2° | 2.3° | 41.5mm | 13.1 | 46 |
| April | 15.6° | 4.4° | 35.3mm | 10.4 | 65 |
| May | 19.6° | 8.2° | 57.8mm | 12.3 | 74 |
| June | 23.1° | 11.3° | 58.8mm | 11.7 | 77 |
| July | 24.9° | 13.3° | 66.8mm | 12.8 | 74 |
| August | 24.7° | 13.2° | 65.1mm | 12.8 | 74 |
| September | 20.8° | 10.2° | 46.9mm | 11.3 | 77 |
| October | 16° | 7.7° | 44.5mm | 12.2 | 63 |
| November | 9.9° | 3.8° | 43.8mm | 13.4 | 41 |
| December | 6.5° | 1.3° | 41.9mm | 14.9 | 26 |
January in Kerpen averages a daily high of 5.8°C with nights around 0.3°C. Expect roughly 13.9 wet days totalling 35.4mm. A hard month to visit for comfort alone.
February in Kerpen averages a daily high of 7.6°C with nights around 1°C. Expect roughly 12.9 wet days totalling 37.8mm. A hard month to visit for comfort alone.
March in Kerpen averages a daily high of 11.2°C with nights around 2.3°C. Expect roughly 13.1 wet days totalling 41.5mm. Demanding conditions — pack for it and plan indoor options.
April in Kerpen averages a daily high of 15.6°C with nights around 4.4°C. Expect roughly 10.4 wet days totalling 35.3mm. Generally workable, with some weather to plan around.
May in Kerpen averages a daily high of 19.6°C with nights around 8.2°C. Expect roughly 12.3 wet days totalling 57.8mm. Generally workable, with some weather to plan around.
June in Kerpen averages a daily high of 23.1°C with nights around 11.3°C. Expect roughly 11.7 wet days totalling 58.8mm. Comfortable conditions for being outdoors all day.
July in Kerpen averages a daily high of 24.9°C with nights around 13.3°C. Expect roughly 12.8 wet days totalling 66.8mm. Generally workable, with some weather to plan around.
August in Kerpen averages a daily high of 24.7°C with nights around 13.2°C. Expect roughly 12.8 wet days totalling 65.1mm. Generally workable, with some weather to plan around.
September in Kerpen averages a daily high of 20.8°C with nights around 10.2°C. Expect roughly 11.3 wet days totalling 46.9mm. Comfortable conditions for being outdoors all day.
October in Kerpen averages a daily high of 16°C with nights around 7.7°C. Expect roughly 12.2 wet days totalling 44.5mm. Generally workable, with some weather to plan around.
November in Kerpen averages a daily high of 9.9°C with nights around 3.8°C. Expect roughly 13.4 wet days totalling 43.8mm. Demanding conditions — pack for it and plan indoor options.
December in Kerpen averages a daily high of 6.5°C with nights around 1.3°C. Expect roughly 14.9 wet days totalling 41.9mm. 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. Kerpen peaks at 77.
Based on 30 years of records, May–September scores highest for comfort in Kerpen, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 24.9°C.
July is the wettest, averaging 66.8mm of rain across roughly 12.8 wet days.
January is the coolest month, with average daily highs around 5.8°C.