| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 5.5° | 0.6° | 74mm | 17.9 | 21 |
| February | 6.5° | 0.6° | 57mm | 14.7 | 25 |
| March | 10.5° | 2.1° | 58.8mm | 13.4 | 43 |
| April | 15.3° | 4.6° | 43.2mm | 11.8 | 61 |
| May | 19.5° | 8.1° | 59.8mm | 11.8 | 75 |
| June | 22.2° | 11.2° | 80.9mm | 12.8 | 74 |
| July | 24.5° | 13.2° | 94.3mm | 15.5 | 70 |
| August | 23.9° | 12.9° | 89.3mm | 14.3 | 71 |
| September | 20.2° | 10.2° | 60.6mm | 11.3 | 77 |
| October | 15.3° | 7.2° | 69.5mm | 14.5 | 56 |
| November | 10.1° | 4.4° | 79mm | 15.9 | 38 |
| December | 6.5° | 1.7° | 86.8mm | 18.9 | 26 |
January in Castrop-Rauxel averages a daily high of 5.5°C with nights around 0.6°C. Expect roughly 17.9 wet days totalling 74mm. A hard month to visit for comfort alone.
February in Castrop-Rauxel averages a daily high of 6.5°C with nights around 0.6°C. Expect roughly 14.7 wet days totalling 57mm. A hard month to visit for comfort alone.
March in Castrop-Rauxel averages a daily high of 10.5°C with nights around 2.1°C. Expect roughly 13.4 wet days totalling 58.8mm. Demanding conditions — pack for it and plan indoor options.
April in Castrop-Rauxel averages a daily high of 15.3°C with nights around 4.6°C. Expect roughly 11.8 wet days totalling 43.2mm. Generally workable, with some weather to plan around.
May in Castrop-Rauxel averages a daily high of 19.5°C with nights around 8.1°C. Expect roughly 11.8 wet days totalling 59.8mm. Comfortable conditions for being outdoors all day.
June in Castrop-Rauxel averages a daily high of 22.2°C with nights around 11.2°C. Expect roughly 12.8 wet days totalling 80.9mm. Generally workable, with some weather to plan around.
July in Castrop-Rauxel averages a daily high of 24.5°C with nights around 13.2°C. Expect roughly 15.5 wet days totalling 94.3mm. Generally workable, with some weather to plan around.
August in Castrop-Rauxel averages a daily high of 23.9°C with nights around 12.9°C. Expect roughly 14.3 wet days totalling 89.3mm. Generally workable, with some weather to plan around.
September in Castrop-Rauxel averages a daily high of 20.2°C with nights around 10.2°C. Expect roughly 11.3 wet days totalling 60.6mm. Comfortable conditions for being outdoors all day.
October in Castrop-Rauxel averages a daily high of 15.3°C with nights around 7.2°C. Expect roughly 14.5 wet days totalling 69.5mm. Generally workable, with some weather to plan around.
November in Castrop-Rauxel averages a daily high of 10.1°C with nights around 4.4°C. Expect roughly 15.9 wet days totalling 79mm. Demanding conditions — pack for it and plan indoor options.
December in Castrop-Rauxel averages a daily high of 6.5°C with nights around 1.7°C. Expect roughly 18.9 wet days totalling 86.8mm. 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. Castrop-Rauxel peaks at 77.
Based on 30 years of records, May–September scores highest for comfort in Castrop-Rauxel, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 24.5°C.
July is the wettest, averaging 94.3mm of rain across roughly 15.5 wet days.
January is the coolest month, with average daily highs around 5.5°C.