| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -1° | -5.7° | 56.4mm | 18.3 | 3 |
| February | -0.7° | -5.8° | 40.6mm | 15 | 3 |
| March | 3.1° | -3.7° | 33.6mm | 12.1 | 13 |
| April | 9.5° | 0.7° | 34.1mm | 9.9 | 45 |
| May | 15.5° | 5.3° | 37.5mm | 9.1 | 67 |
| June | 19.8° | 10.2° | 66.3mm | 11 | 77 |
| July | 22.3° | 13.4° | 86.2mm | 12.3 | 75 |
| August | 21.3° | 12.5° | 80.2mm | 13 | 74 |
| September | 16.3° | 8.6° | 57.9mm | 12.3 | 64 |
| October | 9.9° | 4.1° | 78mm | 16.4 | 38 |
| November | 4.4° | 0.3° | 67.1mm | 17.8 | 18 |
| December | 0.9° | -3.4° | 59.5mm | 19.1 | 7 |
January in Mustamäe averages a daily high of -1°C with nights around -5.7°C. Expect roughly 18.3 wet days totalling 56.4mm. A hard month to visit for comfort alone.
February in Mustamäe averages a daily high of -0.7°C with nights around -5.8°C. Expect roughly 15 wet days totalling 40.6mm. A hard month to visit for comfort alone.
March in Mustamäe averages a daily high of 3.1°C with nights around -3.7°C. Expect roughly 12.1 wet days totalling 33.6mm. A hard month to visit for comfort alone.
April in Mustamäe averages a daily high of 9.5°C with nights around 0.7°C. Expect roughly 9.9 wet days totalling 34.1mm. Demanding conditions — pack for it and plan indoor options.
May in Mustamäe averages a daily high of 15.5°C with nights around 5.3°C. Expect roughly 9.1 wet days totalling 37.5mm. Generally workable, with some weather to plan around.
June in Mustamäe averages a daily high of 19.8°C with nights around 10.2°C. Expect roughly 11 wet days totalling 66.3mm. Comfortable conditions for being outdoors all day.
July in Mustamäe averages a daily high of 22.3°C with nights around 13.4°C. Expect roughly 12.3 wet days totalling 86.2mm. Comfortable conditions for being outdoors all day.
August in Mustamäe averages a daily high of 21.3°C with nights around 12.5°C. Expect roughly 13 wet days totalling 80.2mm. Generally workable, with some weather to plan around.
September in Mustamäe averages a daily high of 16.3°C with nights around 8.6°C. Expect roughly 12.3 wet days totalling 57.9mm. Generally workable, with some weather to plan around.
October in Mustamäe averages a daily high of 9.9°C with nights around 4.1°C. Expect roughly 16.4 wet days totalling 78mm. Demanding conditions — pack for it and plan indoor options.
November in Mustamäe averages a daily high of 4.4°C with nights around 0.3°C. Expect roughly 17.8 wet days totalling 67.1mm. A hard month to visit for comfort alone.
December in Mustamäe averages a daily high of 0.9°C with nights around -3.4°C. Expect roughly 19.1 wet days totalling 59.5mm. 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. Mustamäe peaks at 77.
Based on 30 years of records, June–August scores highest for comfort in Mustamäe, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 22.3°C.
July is the wettest, averaging 86.2mm of rain across roughly 12.3 wet days.
January is the coolest month, with average daily highs around -1°C.