| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 3.8° | -5.1° | 4.2mm | 1.9 | 34 |
| February | 7.8° | -1.9° | 8.5mm | 2.3 | 51 |
| March | 15.5° | 4.1° | 10.9mm | 2.3 | 81 |
| April | 22.1° | 10.3° | 23.3mm | 4 | 92 |
| May | 28° | 16.2° | 39.5mm | 5.5 | 85 |
| June | 32.6° | 21.2° | 56.9mm | 7.5 | 63 |
| July | 32.7° | 23.6° | 166.5mm | 10.3 | 57 |
| August | 31° | 22.2° | 163.4mm | 10.3 | 63 |
| September | 27.1° | 17.3° | 66.2mm | 6.8 | 86 |
| October | 20.8° | 10.3° | 31.6mm | 4.3 | 91 |
| November | 12.2° | 2.4° | 16.9mm | 3 | 69 |
| December | 5.7° | -3.4° | 4.8mm | 1.8 | 43 |
January in Tianchang averages a daily high of 3.8°C with nights around -5.1°C. Rain is rare — about 1.9 wet days and 4.2mm across the month. A hard month to visit for comfort alone.
February in Tianchang averages a daily high of 7.8°C with nights around -1.9°C. Rain is rare — about 2.3 wet days and 8.5mm across the month. Demanding conditions — pack for it and plan indoor options.
March in Tianchang averages a daily high of 15.5°C with nights around 4.1°C. Rain is rare — about 2.3 wet days and 10.9mm across the month. Comfortable conditions for being outdoors all day.
April in Tianchang averages a daily high of 22.1°C with nights around 10.3°C. Expect roughly 4 wet days totalling 23.3mm. Comfortable conditions for being outdoors all day.
May in Tianchang averages a daily high of 28°C with nights around 16.2°C. Expect roughly 5.5 wet days totalling 39.5mm. Comfortable conditions for being outdoors all day.
June in Tianchang averages a daily high of 32.6°C with nights around 21.2°C. Expect roughly 7.5 wet days totalling 56.9mm. Generally workable, with some weather to plan around.
July in Tianchang averages a daily high of 32.7°C with nights around 23.6°C. Expect roughly 10.3 wet days totalling 166.5mm. Generally workable, with some weather to plan around.
August in Tianchang averages a daily high of 31°C with nights around 22.2°C. Expect roughly 10.3 wet days totalling 163.4mm. Generally workable, with some weather to plan around.
September in Tianchang averages a daily high of 27.1°C with nights around 17.3°C. Expect roughly 6.8 wet days totalling 66.2mm. Comfortable conditions for being outdoors all day.
October in Tianchang averages a daily high of 20.8°C with nights around 10.3°C. Expect roughly 4.3 wet days totalling 31.6mm. Comfortable conditions for being outdoors all day.
November in Tianchang averages a daily high of 12.2°C with nights around 2.4°C. Expect roughly 3 wet days totalling 16.9mm. Generally workable, with some weather to plan around.
December in Tianchang averages a daily high of 5.7°C with nights around -3.4°C. Rain is rare — about 1.8 wet days and 4.8mm across the month. Demanding conditions — pack for it and plan indoor options.
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. Tianchang peaks at 92.
Based on 30 years of records, April–May scores highest for comfort in Tianchang, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 32.7°C.
July is the wettest, averaging 166.5mm of rain across roughly 10.3 wet days.
January is the coolest month, with average daily highs around 3.8°C.