| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -2.1° | -6.8° | 46.8mm | 18.9 | 2 |
| February | -1.3° | -6.9° | 39.2mm | 15.1 | 2 |
| March | 3.5° | -4° | 33.5mm | 13.1 | 12 |
| April | 11.2° | 1.2° | 35mm | 11 | 49 |
| May | 17.2° | 5.9° | 52.8mm | 10.8 | 69 |
| June | 21.2° | 10.6° | 86.8mm | 12.9 | 74 |
| July | 23.3° | 13.1° | 70.8mm | 12.8 | 74 |
| August | 22° | 12.2° | 81.2mm | 13.6 | 73 |
| September | 16.7° | 8.1° | 52.1mm | 12.3 | 65 |
| October | 9.6° | 3.7° | 68.4mm | 16.2 | 37 |
| November | 3.6° | -0.3° | 56.7mm | 16.7 | 14 |
| December | -0.3° | -4.5° | 52.4mm | 19.1 | 5 |
January in Tartu averages a daily high of -2.1°C with nights around -6.8°C. Expect roughly 18.9 wet days totalling 46.8mm. A hard month to visit for comfort alone.
February in Tartu averages a daily high of -1.3°C with nights around -6.9°C. Expect roughly 15.1 wet days totalling 39.2mm. A hard month to visit for comfort alone.
March in Tartu averages a daily high of 3.5°C with nights around -4°C. Expect roughly 13.1 wet days totalling 33.5mm. A hard month to visit for comfort alone.
April in Tartu averages a daily high of 11.2°C with nights around 1.2°C. Expect roughly 11 wet days totalling 35mm. Demanding conditions — pack for it and plan indoor options.
May in Tartu averages a daily high of 17.2°C with nights around 5.9°C. Expect roughly 10.8 wet days totalling 52.8mm. Generally workable, with some weather to plan around.
June in Tartu averages a daily high of 21.2°C with nights around 10.6°C. Expect roughly 12.9 wet days totalling 86.8mm. Generally workable, with some weather to plan around.
July in Tartu averages a daily high of 23.3°C with nights around 13.1°C. Expect roughly 12.8 wet days totalling 70.8mm. Generally workable, with some weather to plan around.
August in Tartu averages a daily high of 22°C with nights around 12.2°C. Expect roughly 13.6 wet days totalling 81.2mm. Generally workable, with some weather to plan around.
September in Tartu averages a daily high of 16.7°C with nights around 8.1°C. Expect roughly 12.3 wet days totalling 52.1mm. Generally workable, with some weather to plan around.
October in Tartu averages a daily high of 9.6°C with nights around 3.7°C. Expect roughly 16.2 wet days totalling 68.4mm. Demanding conditions — pack for it and plan indoor options.
November in Tartu averages a daily high of 3.6°C with nights around -0.3°C. Expect roughly 16.7 wet days totalling 56.7mm. A hard month to visit for comfort alone.
December in Tartu averages a daily high of -0.3°C with nights around -4.5°C. Expect roughly 19.1 wet days totalling 52.4mm. 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. Tartu peaks at 74.
Based on 30 years of records, May–August scores highest for comfort in Tartu, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 23.3°C.
June is the wettest, averaging 86.8mm of rain across roughly 12.9 wet days.
January is the coolest month, with average daily highs around -2.1°C.