Temperature
Hot by day, warm at night.
Hot afternoons and some sun. Humid air is the main drawback.

Hot by day, warm at night.
Rain is frequent, with a mix of brief and longer spells. About 15 wet days, the highest monthly average.
Cloudier spells limit sunshine.
Very humid air is a major factor this month.
In July, afternoons feel about 96° and nights feel near 87°.
Mostly cloudy skies this month.
Calm winds are typical in July.
July late afternoons are around 88°F, easing to about 84°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 45 | 33 | 2.3 | 8 | 6.5 | 73 |
| Feb | 49 | 36 | 2.2 | 9 | 6.7 | 73 |
| Mar | 57 | 44 | 3.2 | 11 | 7.2 | 72 |
| Apr | 68 | 54 | 3.7 | 10 | 8.1 | 71 |
| May | 77 | 63 | 4.7 | 10 | 8.6 | 72 |
| Jun | 83 | 71 | 9.6 | 13 | 7.9 | 79 |
| Jul | 89 | 79 | 7.6 | 15 | 9.2 | 79 |
| Aug | 89 | 78 | 6.6 | 15 | 9.2 | 79 |
| Sep | 82 | 70 | 3.4 | 10 | 8.7 | 79 |
| Oct | 73 | 59 | 2.0 | 6 | 8.0 | 75 |
| Nov | 62 | 48 | 2.0 | 7 | 6.9 | 74 |
| Dec | 50 | 37 | 1.5 | 6 | 6.9 | 71 |
Similar climates
Want a side-by-side climate view? Compare Zhangjiagang with Tokyo.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Aug 26, 2026
Data & methodology