Suzhou is warmest in June, averaging 34° by day and 20° at night. The wettest month is July with 357 mm, and the year brings about 1061 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 8° | -4° | 37 mm | 10.0 h | Cool |
| February | 11° | -2° | 42 mm | 10.8 h | Cool |
| March | 18° | 3° | 59 mm | 11.7 h | Sightseeing |
| April | 23° | 9° | 39 mm | 12.8 h | Sightseeing |
| May | 30° | 15° | 68 mm | 13.7 h | Beach weather |
| June | 34° | 20° | 147 mm | 14.2 h | Mild |
| July | 32° | 24° | 357 mm | 14.0 h | Rainy season |
| August | 33° | 23° | 121 mm | 13.3 h | Mild |
| September | 30° | 18° | 87 mm | 12.2 h | Beach weather |
| October | 23° | 11° | 50 mm | 11.1 h | Sightseeing |
| November | 17° | 4° | 42 mm | 10.2 h | Sightseeing |
| December | 9° | -2° | 12 mm | 9.8 h | Cool |
High and low are average daily maximum and minimum, rain is typical monthly total, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER — averages, not promises.
When to go
Beach weather: May and September — highs around 30°, nights no colder than 15°, and at most 87 mm of rain in a month.
Walking the city: March, April, October and November — highs of 17–23° and no more than 59 mm of rain a month.
Wet season: July — up to 357 mm in a single month.