Huai'an is warmest in August, averaging 32° by day and 24° at night. The wettest month is July with 341 mm, and the year brings about 1214 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 7° | -3° | 34 mm | 10.0 h | Cool |
| February | 10° | -1° | 50 mm | 10.8 h | Cool |
| March | 16° | 4° | 65 mm | 11.8 h | Sightseeing |
| April | 22° | 10° | 48 mm | 12.8 h | Sightseeing |
| May | 27° | 16° | 74 mm | 13.7 h | Beach weather |
| June | 32° | 21° | 165 mm | 14.2 h | Mild |
| July | 31° | 25° | 341 mm | 14.0 h | Rainy season |
| August | 32° | 24° | 164 mm | 13.3 h | Mild |
| September | 28° | 19° | 138 mm | 12.2 h | Mild |
| October | 22° | 12° | 71 mm | 11.1 h | Sightseeing |
| November | 16° | 6° | 45 mm | 10.2 h | Sightseeing |
| December | 8° | -1° | 19 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 — highs around 27°, nights no colder than 16°, and at most 74 mm of rain in a month.
Walking the city: March, April, October and November — highs of 16–22° and no more than 71 mm of rain a month.
Wet season: July — up to 341 mm in a single month.