| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 1.5° | -5° | 29.3mm | 9.1 | 16 |
| February | 4.6° | -3.2° | 25.9mm | 8.3 | 26 |
| March | 10.4° | 0.2° | 31.3mm | 9.4 | 48 |
| April | 17.6° | 5.5° | 46.3mm | 8.9 | 75 |
| May | 23.5° | 10.6° | 53.2mm | 10 | 80 |
| June | 27.4° | 14.8° | 71.6mm | 9.6 | 79 |
| July | 29.4° | 16.5° | 69.7mm | 9.3 | 72 |
| August | 29.1° | 15.8° | 51.8mm | 6.8 | 78 |
| September | 23.2° | 11.1° | 51.8mm | 7.6 | 85 |
| October | 16.6° | 6° | 43.5mm | 6.7 | 76 |
| November | 9.2° | 1.9° | 36.3mm | 7.7 | 50 |
| December | 3.1° | -3° | 32.4mm | 8.4 | 22 |
January in Iaşi averages a daily high of 1.5°C with nights around -5°C. Expect roughly 9.1 wet days totalling 29.3mm. A hard month to visit for comfort alone.
February in Iaşi averages a daily high of 4.6°C with nights around -3.2°C. Expect roughly 8.3 wet days totalling 25.9mm. A hard month to visit for comfort alone.
March in Iaşi averages a daily high of 10.4°C with nights around 0.2°C. Expect roughly 9.4 wet days totalling 31.3mm. Demanding conditions — pack for it and plan indoor options.
April in Iaşi averages a daily high of 17.6°C with nights around 5.5°C. Expect roughly 8.9 wet days totalling 46.3mm. Comfortable conditions for being outdoors all day.
May in Iaşi averages a daily high of 23.5°C with nights around 10.6°C. Expect roughly 10 wet days totalling 53.2mm. Comfortable conditions for being outdoors all day.
June in Iaşi averages a daily high of 27.4°C with nights around 14.8°C. Expect roughly 9.6 wet days totalling 71.6mm. Comfortable conditions for being outdoors all day.
July in Iaşi averages a daily high of 29.4°C with nights around 16.5°C. Expect roughly 9.3 wet days totalling 69.7mm. Generally workable, with some weather to plan around.
August in Iaşi averages a daily high of 29.1°C with nights around 15.8°C. Expect roughly 6.8 wet days totalling 51.8mm. Comfortable conditions for being outdoors all day.
September in Iaşi averages a daily high of 23.2°C with nights around 11.1°C. Expect roughly 7.6 wet days totalling 51.8mm. Comfortable conditions for being outdoors all day.
October in Iaşi averages a daily high of 16.6°C with nights around 6°C. Expect roughly 6.7 wet days totalling 43.5mm. Comfortable conditions for being outdoors all day.
November in Iaşi averages a daily high of 9.2°C with nights around 1.9°C. Expect roughly 7.7 wet days totalling 36.3mm. Demanding conditions — pack for it and plan indoor options.
December in Iaşi averages a daily high of 3.1°C with nights around -3°C. Expect roughly 8.4 wet days totalling 32.4mm. 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. Iaşi peaks at 85.
Based on 30 years of records, May–June scores highest for comfort in Iaşi, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 29.4°C.
June is the wettest, averaging 71.6mm of rain across roughly 9.6 wet days.
January is the coolest month, with average daily highs around 1.5°C.