| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 2.2° | -7.3° | 2.8mm | 1.3 | 28 |
| February | 6.2° | -4.2° | 7.2mm | 2 | 43 |
| March | 12.8° | 1.8° | 10.2mm | 3 | 71 |
| April | 20.6° | 9° | 22.1mm | 4.2 | 92 |
| May | 27° | 15° | 33.6mm | 5.8 | 88 |
| June | 30.7° | 20° | 69.9mm | 8.5 | 68 |
| July | 32° | 23° | 172.2mm | 11.1 | 58 |
| August | 30.4° | 21.8° | 118.2mm | 9.1 | 68 |
| September | 26.4° | 16.2° | 56.6mm | 6.3 | 87 |
| October | 19.4° | 8.9° | 27.5mm | 4 | 90 |
| November | 10.5° | 0.7° | 15mm | 2.2 | 63 |
| December | 3.5° | -5.1° | 3mm | 1.4 | 34 |
January in Tongzhou averages a daily high of 2.2°C with nights around -7.3°C. Rain is rare — about 1.3 wet days and 2.8mm across the month. A hard month to visit for comfort alone.
February in Tongzhou averages a daily high of 6.2°C with nights around -4.2°C. Rain is rare — about 2 wet days and 7.2mm across the month. Demanding conditions — pack for it and plan indoor options.
March in Tongzhou averages a daily high of 12.8°C with nights around 1.8°C. Expect roughly 3 wet days totalling 10.2mm. Generally workable, with some weather to plan around.
April in Tongzhou averages a daily high of 20.6°C with nights around 9°C. Expect roughly 4.2 wet days totalling 22.1mm. Comfortable conditions for being outdoors all day.
May in Tongzhou averages a daily high of 27°C with nights around 15°C. Expect roughly 5.8 wet days totalling 33.6mm. Comfortable conditions for being outdoors all day.
June in Tongzhou averages a daily high of 30.7°C with nights around 20°C. Expect roughly 8.5 wet days totalling 69.9mm. Generally workable, with some weather to plan around.
July in Tongzhou averages a daily high of 32°C with nights around 23°C. Expect roughly 11.1 wet days totalling 172.2mm. Generally workable, with some weather to plan around.
August in Tongzhou averages a daily high of 30.4°C with nights around 21.8°C. Expect roughly 9.1 wet days totalling 118.2mm. Generally workable, with some weather to plan around.
September in Tongzhou averages a daily high of 26.4°C with nights around 16.2°C. Expect roughly 6.3 wet days totalling 56.6mm. Comfortable conditions for being outdoors all day.
October in Tongzhou averages a daily high of 19.4°C with nights around 8.9°C. Expect roughly 4 wet days totalling 27.5mm. Comfortable conditions for being outdoors all day.
November in Tongzhou averages a daily high of 10.5°C with nights around 0.7°C. Rain is rare — about 2.2 wet days and 15mm across the month. Generally workable, with some weather to plan around.
December in Tongzhou averages a daily high of 3.5°C with nights around -5.1°C. Rain is rare — about 1.4 wet days and 3mm across the month. 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. Tongzhou peaks at 92.
Based on 30 years of records, April–May scores highest for comfort in Tongzhou, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 32°C.
July is the wettest, averaging 172.2mm of rain across roughly 11.1 wet days.
January is the coolest month, with average daily highs around 2.2°C.