| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -9.8° | -21.9° | 7.9mm | 3.7 | 23 |
| February | -4.1° | -17.4° | 5mm | 2.7 | 25 |
| March | 4° | -8° | 15mm | 5.6 | 23 |
| April | 14.7° | 0.9° | 25.8mm | 7 | 67 |
| May | 21.5° | 8° | 64.1mm | 12.5 | 75 |
| June | 26.6° | 14.3° | 74.8mm | 13.4 | 73 |
| July | 28.7° | 18.1° | 124.3mm | 13 | 67 |
| August | 27.5° | 16.8° | 124.1mm | 13.1 | 72 |
| September | 22.4° | 9.3° | 58.9mm | 8.3 | 83 |
| October | 13.9° | 0.6° | 28.6mm | 6.7 | 65 |
| November | 1.8° | -8.9° | 21.4mm | 5.7 | 19 |
| December | -8° | -18.6° | 8.2mm | 4.8 | 20 |
January in Mudanjiang averages a daily high of -9.8°C with nights around -21.9°C. Expect roughly 3.7 wet days totalling 7.9mm. A hard month to visit for comfort alone.
February in Mudanjiang averages a daily high of -4.1°C with nights around -17.4°C. Rain is rare — about 2.7 wet days and 5mm across the month. A hard month to visit for comfort alone.
March in Mudanjiang averages a daily high of 4°C with nights around -8°C. Expect roughly 5.6 wet days totalling 15mm. A hard month to visit for comfort alone.
April in Mudanjiang averages a daily high of 14.7°C with nights around 0.9°C. Expect roughly 7 wet days totalling 25.8mm. Generally workable, with some weather to plan around.
May in Mudanjiang averages a daily high of 21.5°C with nights around 8°C. Expect roughly 12.5 wet days totalling 64.1mm. Comfortable conditions for being outdoors all day.
June in Mudanjiang averages a daily high of 26.6°C with nights around 14.3°C. Expect roughly 13.4 wet days totalling 74.8mm. Generally workable, with some weather to plan around.
July in Mudanjiang averages a daily high of 28.7°C with nights around 18.1°C. Expect roughly 13 wet days totalling 124.3mm. Generally workable, with some weather to plan around.
August in Mudanjiang averages a daily high of 27.5°C with nights around 16.8°C. Expect roughly 13.1 wet days totalling 124.1mm. Generally workable, with some weather to plan around.
September in Mudanjiang averages a daily high of 22.4°C with nights around 9.3°C. Expect roughly 8.3 wet days totalling 58.9mm. Comfortable conditions for being outdoors all day.
October in Mudanjiang averages a daily high of 13.9°C with nights around 0.6°C. Expect roughly 6.7 wet days totalling 28.6mm. Generally workable, with some weather to plan around.
November in Mudanjiang averages a daily high of 1.8°C with nights around -8.9°C. Expect roughly 5.7 wet days totalling 21.4mm. A hard month to visit for comfort alone.
December in Mudanjiang averages a daily high of -8°C with nights around -18.6°C. Expect roughly 4.8 wet days totalling 8.2mm. 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. Mudanjiang peaks at 83.
Based on 30 years of records, May scores highest for comfort in Mudanjiang, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 28.7°C.
July is the wettest, averaging 124.3mm of rain across roughly 13 wet days.
January is the coolest month, with average daily highs around -9.8°C.