Jiangsu weather in December
December is one of the least pleasant months in Jiangsu: highs of 9°C (48°F) and about 42 mm (1.7 in) of rain on average. Nights average -1°C (30°F) and cloud cover 54% (NASA POWER, 2001–2025 averages). It is the driest month of the year and the 2nd coolest. Compared with November, it is cooler and drier; January brings highs of 7°C (44°F) and 52 mm (2.0 in) of rain.
Figures are long-term averages for Nanjing, the largest city in Jiangsu. See below for other places.
Is December a good time to visit Jiangsu?
least pleasant month Weather score 49/100.
December is one of the least pleasant months for weather in Jiangsu. For better conditions, consider Apr–May, Sep–Nov.
Does it rain a lot in Jiangsu in December?
No, it is usually dry: about 42 mm (1.7 in) falls in an average December. It is the driest month of the year.
How warm is Jiangsu in December?
Days average 9°C (48°F) and nights -1°C (30°F).
Jiangsu weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 7°C (44°F) | -3°C (27°F) | 52 mm | 61% | least pleasant |
| February | 10°C (50°F) | 0°C (31°F) | 64 mm | 66% | least pleasant |
| March | 16°C (60°F) | 4°C (39°F) | 70 mm | 63% | fair |
| April | 22°C (72°F) | 10°C (50°F) | 95 mm | 65% | best |
| May | 27°C (81°F) | 16°C (60°F) | 87 mm | 70% | best |
| June | 31°C (87°F) | 21°C (69°F) | 181 mm | 75% | fair |
| July | 32°C (90°F) | 25°C (76°F) | 243 mm | 74% | least pleasant |
| August | 32°C (89°F) | 24°C (75°F) | 156 mm | 67% | fair |
| September | 28°C (83°F) | 19°C (65°F) | 94 mm | 64% | best |
| October | 23°C (74°F) | 12°C (54°F) | 55 mm | 57% | best |
| November | 17°C (62°F) | 6°C (42°F) | 59 mm | 55% | best |
| December | 9°C (48°F) | -1°C (30°F) | 42 mm | 54% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Jiangsu in December
Weather can differ a lot within Jiangsu: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Nanjing | 9°C (48°F) | -1°C (30°F) | 42 mm | least pleasant |
| Suzhou | 10°C (50°F) | 1°C (33°F) | 43 mm | least pleasant |
| Yangzhou | 8°C (47°F) | -1°C (30°F) | 35 mm | least pleasant |
| Huai'an | 7°C (45°F) | -2°C (29°F) | 27 mm | least pleasant |
| Wuxi | 9°C (49°F) | 1°C (34°F) | 44 mm | least pleasant |
| Changzhou | 9°C (49°F) | 0°C (31°F) | 38 mm | least pleasant |
| Nantong | 10°C (49°F) | 0°C (32°F) | 38 mm | least pleasant |
| Kunshan | 10°C (50°F) | 3°C (38°F) | 57 mm | least pleasant |
| Lianyungang | 7°C (44°F) | -1°C (30°F) | 23 mm | least pleasant |
| Jiangyin | 9°C (49°F) | 0°C (31°F) | 38 mm | least pleasant |
| Changshu | 10°C (50°F) | 1°C (33°F) | 43 mm | least pleasant |
| Yancheng | 8°C (46°F) | -2°C (29°F) | 32 mm | least pleasant |