| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 1.3° | -4.9° | 28.6mm | 10.6 | 13 |
| February | 4.8° | -3.2° | 27mm | 9.7 | 24 |
| March | 10.3° | -0.1° | 34.9mm | 9.8 | 46 |
| April | 16.5° | 4.6° | 50.6mm | 10.9 | 67 |
| May | 21.6° | 9.2° | 71.5mm | 12.5 | 75 |
| June | 25.1° | 12.9° | 88.3mm | 12.6 | 75 |
| July | 27.1° | 14.4° | 86.8mm | 11.8 | 76 |
| August | 27.3° | 14.1° | 66mm | 9.3 | 80 |
| September | 21.6° | 9.8° | 58.3mm | 9.5 | 81 |
| October | 15.9° | 4.9° | 41.1mm | 8.1 | 71 |
| November | 8.6° | 0.7° | 33.9mm | 9 | 44 |
| December | 2.3° | -3.2° | 35.3mm | 10.3 | 17 |
January in Cluj-Napoca averages a daily high of 1.3°C with nights around -4.9°C. Expect roughly 10.6 wet days totalling 28.6mm. A hard month to visit for comfort alone.
February in Cluj-Napoca averages a daily high of 4.8°C with nights around -3.2°C. Expect roughly 9.7 wet days totalling 27mm. A hard month to visit for comfort alone.
March in Cluj-Napoca averages a daily high of 10.3°C with nights around -0.1°C. Expect roughly 9.8 wet days totalling 34.9mm. Demanding conditions — pack for it and plan indoor options.
April in Cluj-Napoca averages a daily high of 16.5°C with nights around 4.6°C. Expect roughly 10.9 wet days totalling 50.6mm. Generally workable, with some weather to plan around.
May in Cluj-Napoca averages a daily high of 21.6°C with nights around 9.2°C. Expect roughly 12.5 wet days totalling 71.5mm. Comfortable conditions for being outdoors all day.
June in Cluj-Napoca averages a daily high of 25.1°C with nights around 12.9°C. Expect roughly 12.6 wet days totalling 88.3mm. Comfortable conditions for being outdoors all day.
July in Cluj-Napoca averages a daily high of 27.1°C with nights around 14.4°C. Expect roughly 11.8 wet days totalling 86.8mm. Comfortable conditions for being outdoors all day.
August in Cluj-Napoca averages a daily high of 27.3°C with nights around 14.1°C. Expect roughly 9.3 wet days totalling 66mm. Comfortable conditions for being outdoors all day.
September in Cluj-Napoca averages a daily high of 21.6°C with nights around 9.8°C. Expect roughly 9.5 wet days totalling 58.3mm. Comfortable conditions for being outdoors all day.
October in Cluj-Napoca averages a daily high of 15.9°C with nights around 4.9°C. Expect roughly 8.1 wet days totalling 41.1mm. Generally workable, with some weather to plan around.
November in Cluj-Napoca averages a daily high of 8.6°C with nights around 0.7°C. Expect roughly 9 wet days totalling 33.9mm. Demanding conditions — pack for it and plan indoor options.
December in Cluj-Napoca averages a daily high of 2.3°C with nights around -3.2°C. Expect roughly 10.3 wet days totalling 35.3mm. 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. Cluj-Napoca peaks at 81.
Based on 30 years of records, May–September scores highest for comfort in Cluj-Napoca, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 27.3°C.
June is the wettest, averaging 88.3mm of rain across roughly 12.6 wet days.
January is the coolest month, with average daily highs around 1.3°C.