| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 5.4° | -0.8° | 71.7mm | 17.2 | 19 |
| February | 6.8° | -1.1° | 62.7mm | 14.8 | 24 |
| March | 10.2° | -0.2° | 60.4mm | 13.9 | 38 |
| April | 14.8° | 2° | 45.2mm | 10.7 | 62 |
| May | 18.6° | 5.5° | 69.9mm | 13.8 | 68 |
| June | 22.2° | 9.2° | 64.2mm | 12.3 | 75 |
| July | 24° | 11° | 102.1mm | 14.7 | 71 |
| August | 23.5° | 10.9° | 94.5mm | 14.6 | 71 |
| September | 19.9° | 8° | 58.7mm | 11.7 | 76 |
| October | 15.5° | 5.8° | 58.8mm | 13.2 | 59 |
| November | 9.9° | 2.7° | 66.7mm | 15 | 38 |
| December | 6.5° | 0.7° | 71.3mm | 18.3 | 25 |
January in Arnsberg averages a daily high of 5.4°C with nights around -0.8°C. Expect roughly 17.2 wet days totalling 71.7mm. A hard month to visit for comfort alone.
February in Arnsberg averages a daily high of 6.8°C with nights around -1.1°C. Expect roughly 14.8 wet days totalling 62.7mm. A hard month to visit for comfort alone.
March in Arnsberg averages a daily high of 10.2°C with nights around -0.2°C. Expect roughly 13.9 wet days totalling 60.4mm. Demanding conditions — pack for it and plan indoor options.
April in Arnsberg averages a daily high of 14.8°C with nights around 2°C. Expect roughly 10.7 wet days totalling 45.2mm. Generally workable, with some weather to plan around.
May in Arnsberg averages a daily high of 18.6°C with nights around 5.5°C. Expect roughly 13.8 wet days totalling 69.9mm. Generally workable, with some weather to plan around.
June in Arnsberg averages a daily high of 22.2°C with nights around 9.2°C. Expect roughly 12.3 wet days totalling 64.2mm. Comfortable conditions for being outdoors all day.
July in Arnsberg averages a daily high of 24°C with nights around 11°C. Expect roughly 14.7 wet days totalling 102.1mm. Generally workable, with some weather to plan around.
August in Arnsberg averages a daily high of 23.5°C with nights around 10.9°C. Expect roughly 14.6 wet days totalling 94.5mm. Generally workable, with some weather to plan around.
September in Arnsberg averages a daily high of 19.9°C with nights around 8°C. Expect roughly 11.7 wet days totalling 58.7mm. Comfortable conditions for being outdoors all day.
October in Arnsberg averages a daily high of 15.5°C with nights around 5.8°C. Expect roughly 13.2 wet days totalling 58.8mm. Generally workable, with some weather to plan around.
November in Arnsberg averages a daily high of 9.9°C with nights around 2.7°C. Expect roughly 15 wet days totalling 66.7mm. Demanding conditions — pack for it and plan indoor options.
December in Arnsberg averages a daily high of 6.5°C with nights around 0.7°C. Expect roughly 18.3 wet days totalling 71.3mm. 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. Arnsberg peaks at 76.
Based on 30 years of records, May–September scores highest for comfort in Arnsberg, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 24°C.
July is the wettest, averaging 102.1mm of rain across roughly 14.7 wet days.
January is the coolest month, with average daily highs around 5.4°C.