| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -6.2° | -18° | 5.2mm | 2 | 26 |
| February | -1.3° | -14.4° | 6.4mm | 2.4 | 25 |
| March | 6° | -6.9° | 12.8mm | 4.7 | 32 |
| April | 15.5° | 0.9° | 28.5mm | 7 | 70 |
| May | 21.2° | 7.5° | 62.2mm | 11.5 | 77 |
| June | 24.9° | 13.4° | 77.4mm | 12.7 | 75 |
| July | 27.4° | 17.6° | 131mm | 13.3 | 72 |
| August | 27.4° | 17.3° | 112.1mm | 12.9 | 73 |
| September | 22.8° | 9.8° | 58.4mm | 7.3 | 85 |
| October | 15.3° | 1.1° | 27.8mm | 6.3 | 71 |
| November | 4.2° | -7.4° | 20.2mm | 4.4 | 27 |
| December | -4.7° | -15.6° | 4.2mm | 2.7 | 25 |
January in Tumen averages a daily high of -6.2°C with nights around -18°C. Rain is rare — about 2 wet days and 5.2mm across the month. A hard month to visit for comfort alone.
February in Tumen averages a daily high of -1.3°C with nights around -14.4°C. Rain is rare — about 2.4 wet days and 6.4mm across the month. A hard month to visit for comfort alone.
March in Tumen averages a daily high of 6°C with nights around -6.9°C. Expect roughly 4.7 wet days totalling 12.8mm. A hard month to visit for comfort alone.
April in Tumen averages a daily high of 15.5°C with nights around 0.9°C. Expect roughly 7 wet days totalling 28.5mm. Generally workable, with some weather to plan around.
May in Tumen averages a daily high of 21.2°C with nights around 7.5°C. Expect roughly 11.5 wet days totalling 62.2mm. Comfortable conditions for being outdoors all day.
June in Tumen averages a daily high of 24.9°C with nights around 13.4°C. Expect roughly 12.7 wet days totalling 77.4mm. Comfortable conditions for being outdoors all day.
July in Tumen averages a daily high of 27.4°C with nights around 17.6°C. Expect roughly 13.3 wet days totalling 131mm. Generally workable, with some weather to plan around.
August in Tumen averages a daily high of 27.4°C with nights around 17.3°C. Expect roughly 12.9 wet days totalling 112.1mm. Generally workable, with some weather to plan around.
September in Tumen averages a daily high of 22.8°C with nights around 9.8°C. Expect roughly 7.3 wet days totalling 58.4mm. Comfortable conditions for being outdoors all day.
October in Tumen averages a daily high of 15.3°C with nights around 1.1°C. Expect roughly 6.3 wet days totalling 27.8mm. Generally workable, with some weather to plan around.
November in Tumen averages a daily high of 4.2°C with nights around -7.4°C. Expect roughly 4.4 wet days totalling 20.2mm. A hard month to visit for comfort alone.
December in Tumen averages a daily high of -4.7°C with nights around -15.6°C. Rain is rare — about 2.7 wet days and 4.2mm across the month. 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. Tumen peaks at 85.
Based on 30 years of records, May scores highest for comfort in Tumen, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 27.4°C.
July is the wettest, averaging 131mm of rain across roughly 13.3 wet days.
January is the coolest month, with average daily highs around -6.2°C.