| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -9.4° | -18.8° | 4.8mm | 3.8 | 22 |
| February | -3.8° | -14.2° | 5.9mm | 3 | 24 |
| March | 4° | -6.5° | 13.8mm | 4.6 | 27 |
| April | 14.7° | 3.1° | 23.2mm | 6 | 71 |
| May | 22.2° | 10.6° | 55.1mm | 9.6 | 81 |
| June | 26.8° | 16.6° | 98.8mm | 12 | 76 |
| July | 27.8° | 19.7° | 155.3mm | 13.4 | 70 |
| August | 26.9° | 18° | 144.3mm | 11 | 78 |
| September | 22.5° | 11.4° | 47.4mm | 6.5 | 87 |
| October | 13.7° | 3° | 26mm | 5.4 | 69 |
| November | 1.7° | -7.3° | 22.5mm | 5.8 | 19 |
| December | -7.3° | -16.2° | 7.6mm | 4.3 | 21 |
January in Jiutai averages a daily high of -9.4°C with nights around -18.8°C. Expect roughly 3.8 wet days totalling 4.8mm. A hard month to visit for comfort alone.
February in Jiutai averages a daily high of -3.8°C with nights around -14.2°C. Expect roughly 3 wet days totalling 5.9mm. A hard month to visit for comfort alone.
March in Jiutai averages a daily high of 4°C with nights around -6.5°C. Expect roughly 4.6 wet days totalling 13.8mm. A hard month to visit for comfort alone.
April in Jiutai averages a daily high of 14.7°C with nights around 3.1°C. Expect roughly 6 wet days totalling 23.2mm. Generally workable, with some weather to plan around.
May in Jiutai averages a daily high of 22.2°C with nights around 10.6°C. Expect roughly 9.6 wet days totalling 55.1mm. Comfortable conditions for being outdoors all day.
June in Jiutai averages a daily high of 26.8°C with nights around 16.6°C. Expect roughly 12 wet days totalling 98.8mm. Comfortable conditions for being outdoors all day.
July in Jiutai averages a daily high of 27.8°C with nights around 19.7°C. Expect roughly 13.4 wet days totalling 155.3mm. Generally workable, with some weather to plan around.
August in Jiutai averages a daily high of 26.9°C with nights around 18°C. Expect roughly 11 wet days totalling 144.3mm. Comfortable conditions for being outdoors all day.
September in Jiutai averages a daily high of 22.5°C with nights around 11.4°C. Expect roughly 6.5 wet days totalling 47.4mm. Comfortable conditions for being outdoors all day.
October in Jiutai averages a daily high of 13.7°C with nights around 3°C. Expect roughly 5.4 wet days totalling 26mm. Generally workable, with some weather to plan around.
November in Jiutai averages a daily high of 1.7°C with nights around -7.3°C. Expect roughly 5.8 wet days totalling 22.5mm. A hard month to visit for comfort alone.
December in Jiutai averages a daily high of -7.3°C with nights around -16.2°C. Expect roughly 4.3 wet days totalling 7.6mm. 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. Jiutai peaks at 87.
Based on 30 years of records, May scores highest for comfort in Jiutai, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 27.8°C.
July is the wettest, averaging 155.3mm of rain across roughly 13.4 wet days.
January is the coolest month, with average daily highs around -9.4°C.