| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 5° | -0.9° | 39.3mm | 8.6 | 30 |
| February | 7.1° | 0.6° | 26.7mm | 6.7 | 43 |
| March | 10.3° | 3.4° | 36.7mm | 7.4 | 54 |
| April | 15° | 7.8° | 36.1mm | 7.4 | 69 |
| May | 20.8° | 13.2° | 43.2mm | 7.5 | 85 |
| June | 25.7° | 17.7° | 42.5mm | 6 | 88 |
| July | 28.2° | 20° | 41.3mm | 5.2 | 85 |
| August | 28.1° | 20.1° | 40.2mm | 4 | 88 |
| September | 23.4° | 15.8° | 48.2mm | 5.5 | 89 |
| October | 17.8° | 10.8° | 47.3mm | 6.1 | 81 |
| November | 12.3° | 6.1° | 43.9mm | 7.4 | 61 |
| December | 7.1° | 1.1° | 44.3mm | 8.8 | 40 |
January in Constanţa averages a daily high of 5°C with nights around -0.9°C. Expect roughly 8.6 wet days totalling 39.3mm. A hard month to visit for comfort alone.
February in Constanţa averages a daily high of 7.1°C with nights around 0.6°C. Expect roughly 6.7 wet days totalling 26.7mm. Demanding conditions — pack for it and plan indoor options.
March in Constanţa averages a daily high of 10.3°C with nights around 3.4°C. Expect roughly 7.4 wet days totalling 36.7mm. Demanding conditions — pack for it and plan indoor options.
April in Constanţa averages a daily high of 15°C with nights around 7.8°C. Expect roughly 7.4 wet days totalling 36.1mm. Generally workable, with some weather to plan around.
May in Constanţa averages a daily high of 20.8°C with nights around 13.2°C. Expect roughly 7.5 wet days totalling 43.2mm. Comfortable conditions for being outdoors all day.
June in Constanţa averages a daily high of 25.7°C with nights around 17.7°C. Expect roughly 6 wet days totalling 42.5mm. Comfortable conditions for being outdoors all day.
July in Constanţa averages a daily high of 28.2°C with nights around 20°C. Expect roughly 5.2 wet days totalling 41.3mm. Comfortable conditions for being outdoors all day.
August in Constanţa averages a daily high of 28.1°C with nights around 20.1°C. Expect roughly 4 wet days totalling 40.2mm. Comfortable conditions for being outdoors all day.
September in Constanţa averages a daily high of 23.4°C with nights around 15.8°C. Expect roughly 5.5 wet days totalling 48.2mm. Comfortable conditions for being outdoors all day.
October in Constanţa averages a daily high of 17.8°C with nights around 10.8°C. Expect roughly 6.1 wet days totalling 47.3mm. Comfortable conditions for being outdoors all day.
November in Constanţa averages a daily high of 12.3°C with nights around 6.1°C. Expect roughly 7.4 wet days totalling 43.9mm. Generally workable, with some weather to plan around.
December in Constanţa averages a daily high of 7.1°C with nights around 1.1°C. Expect roughly 8.8 wet days totalling 44.3mm. Demanding conditions — pack for it and plan indoor options.
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. Constanţa peaks at 89.
Based on 30 years of records, May–October scores highest for comfort in Constanţa, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 28.2°C.
September is the wettest, averaging 48.2mm of rain across roughly 5.5 wet days.
January is the coolest month, with average daily highs around 5°C.