| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 7.7° | 1.4° | 34.8mm | 11 | 38 |
| February | 9.7° | 3.4° | 42.9mm | 11.1 | 45 |
| March | 14.9° | 6.9° | 63.5mm | 14.2 | 55 |
| April | 20.2° | 11.5° | 132.4mm | 15.8 | 70 |
| May | 24.4° | 15.7° | 223mm | 17 | 70 |
| June | 27.2° | 19.3° | 250.8mm | 16.1 | 69 |
| July | 30.4° | 21.9° | 193mm | 13.7 | 59 |
| August | 30.5° | 21.3° | 147.5mm | 12 | 62 |
| September | 26.6° | 18° | 98.8mm | 9.7 | 81 |
| October | 20.4° | 13.1° | 118.3mm | 14.1 | 72 |
| November | 15.7° | 8.2° | 56.9mm | 10.3 | 66 |
| December | 9.8° | 3° | 21.8mm | 8.3 | 51 |
January in Longtan averages a daily high of 7.7°C with nights around 1.4°C. Expect roughly 11 wet days totalling 34.8mm. Demanding conditions — pack for it and plan indoor options.
February in Longtan averages a daily high of 9.7°C with nights around 3.4°C. Expect roughly 11.1 wet days totalling 42.9mm. Demanding conditions — pack for it and plan indoor options.
March in Longtan averages a daily high of 14.9°C with nights around 6.9°C. Expect roughly 14.2 wet days totalling 63.5mm. Generally workable, with some weather to plan around.
April in Longtan averages a daily high of 20.2°C with nights around 11.5°C. Expect roughly 15.8 wet days totalling 132.4mm. Generally workable, with some weather to plan around.
May in Longtan averages a daily high of 24.4°C with nights around 15.7°C. Expect roughly 17 wet days totalling 223mm. Generally workable, with some weather to plan around.
June in Longtan averages a daily high of 27.2°C with nights around 19.3°C. Expect roughly 16.1 wet days totalling 250.8mm. Generally workable, with some weather to plan around.
July in Longtan averages a daily high of 30.4°C with nights around 21.9°C. Expect roughly 13.7 wet days totalling 193mm. Generally workable, with some weather to plan around.
August in Longtan averages a daily high of 30.5°C with nights around 21.3°C. Expect roughly 12 wet days totalling 147.5mm. Generally workable, with some weather to plan around.
September in Longtan averages a daily high of 26.6°C with nights around 18°C. Expect roughly 9.7 wet days totalling 98.8mm. Comfortable conditions for being outdoors all day.
October in Longtan averages a daily high of 20.4°C with nights around 13.1°C. Expect roughly 14.1 wet days totalling 118.3mm. Generally workable, with some weather to plan around.
November in Longtan averages a daily high of 15.7°C with nights around 8.2°C. Expect roughly 10.3 wet days totalling 56.9mm. Generally workable, with some weather to plan around.
December in Longtan averages a daily high of 9.8°C with nights around 3°C. Expect roughly 8.3 wet days totalling 21.8mm. 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. Longtan peaks at 81.
Based on 30 years of records, September scores highest for comfort in Longtan, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 30.5°C.
June is the wettest, averaging 250.8mm of rain across roughly 16.1 wet days.
January is the coolest month, with average daily highs around 7.7°C.