| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -17.6° | -27.2° | 5.1mm | 5.8 | 18 |
| February | -10.7° | -23.7° | 2.9mm | 3.2 | 24 |
| March | 0.3° | -13° | 3.3mm | 2.7 | 25 |
| April | 10.7° | -3° | 6mm | 3.2 | 56 |
| May | 18.6° | 3.8° | 17.9mm | 5.7 | 84 |
| June | 25.6° | 11.2° | 31.2mm | 7.5 | 85 |
| July | 27.5° | 14.6° | 61.6mm | 10.3 | 77 |
| August | 24.5° | 12.1° | 58.4mm | 9.9 | 80 |
| September | 17° | 4.5° | 22.9mm | 7.7 | 75 |
| October | 6.8° | -4° | 7.5mm | 5.1 | 39 |
| November | -5.3° | -14.6° | 9.5mm | 7.3 | 15 |
| December | -14.6° | -23.2° | 11.1mm | 8.5 | 13 |
January in Ulan-Ude averages a daily high of -17.6°C with nights around -27.2°C. Expect roughly 5.8 wet days totalling 5.1mm. A hard month to visit for comfort alone.
February in Ulan-Ude averages a daily high of -10.7°C with nights around -23.7°C. Expect roughly 3.2 wet days totalling 2.9mm. A hard month to visit for comfort alone.
March in Ulan-Ude averages a daily high of 0.3°C with nights around -13°C. Rain is rare — about 2.7 wet days and 3.3mm across the month. A hard month to visit for comfort alone.
April in Ulan-Ude averages a daily high of 10.7°C with nights around -3°C. Expect roughly 3.2 wet days totalling 6mm. Generally workable, with some weather to plan around.
May in Ulan-Ude averages a daily high of 18.6°C with nights around 3.8°C. Expect roughly 5.7 wet days totalling 17.9mm. Comfortable conditions for being outdoors all day.
June in Ulan-Ude averages a daily high of 25.6°C with nights around 11.2°C. Expect roughly 7.5 wet days totalling 31.2mm. Comfortable conditions for being outdoors all day.
July in Ulan-Ude averages a daily high of 27.5°C with nights around 14.6°C. Expect roughly 10.3 wet days totalling 61.6mm. Comfortable conditions for being outdoors all day.
August in Ulan-Ude averages a daily high of 24.5°C with nights around 12.1°C. Expect roughly 9.9 wet days totalling 58.4mm. Comfortable conditions for being outdoors all day.
September in Ulan-Ude averages a daily high of 17°C with nights around 4.5°C. Expect roughly 7.7 wet days totalling 22.9mm. Comfortable conditions for being outdoors all day.
October in Ulan-Ude averages a daily high of 6.8°C with nights around -4°C. Expect roughly 5.1 wet days totalling 7.5mm. Demanding conditions — pack for it and plan indoor options.
November in Ulan-Ude averages a daily high of -5.3°C with nights around -14.6°C. Expect roughly 7.3 wet days totalling 9.5mm. A hard month to visit for comfort alone.
December in Ulan-Ude averages a daily high of -14.6°C with nights around -23.2°C. Expect roughly 8.5 wet days totalling 11.1mm. 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. Ulan-Ude peaks at 85.
Based on 30 years of records, May–August scores highest for comfort in Ulan-Ude, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 27.5°C.
July is the wettest, averaging 61.6mm of rain across roughly 10.3 wet days.
January is the coolest month, with average daily highs around -17.6°C.