Suzhou climate
Suzhou is warmest in July, with average highs of 31 °C, and coldest in January, when nights average -3.1 °C. July is the wettest month (236 mm) and December the driest (20 mm). Figures are 1991–2020 climate normals.
Across a full year Suzhou averages 933 mm of rain, 145 days above 25 °C and 69 days below freezing.
China · population 1,647,642 · 1991–2020 normals
Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month
- Warmest month July 31 °C
- Coldest month January -3.1 °C
- Driest month December 20 mm
- Wettest month July 236 mm
- Least cloud December 46 % cloud
- Hottest on record July 41 °C
- Coldest on record December -17 °C
What to expectSuzhou through the year
Suzhou has a clear annual cycle: average daily highs run from 6.7 °C in January to 31 °C in July, a swing of 26 °C in mean temperature across the year.
Counted across a normal year, 145 days a year reach 25 °C, 67 of them reach 30 °C, 69 nights drop below freezing. The warmest reading in the 1991–2020 record is 41 °C, in July.
Rain is strongly seasonal. July averages 236 mm against 20 mm in December — 12 times as much. Planning around the dry months matters more here than planning around temperature.
Month by month
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 6.7 °C | 23 mm | 51 % |
| February | 9.7 °C | 28 mm | 57 % |
| March | 14.7 °C | 43 mm | 60 % |
| April | 21.2 °C | 49 mm | 59 % |
| May | 26.7 °C | 79 mm | 63 % |
| June | 30.5 °C | 134 mm | 64 % |
| July | 31.3 °C | 236 mm | 67 % |
| August | 30.2 °C | 158 mm | 61 % |
| September | 26.8 °C | 79 mm | 56 % |
| October | 22.0 °C | 49 mm | 50 % |
| November | 15.0 °C | 35 mm | 48 % |
| December | 8.6 °C | 20 mm | 46 % |
Temperature month by month
| Month | Avg high | Avg low | Mean | Record high | Record low | Days above 25 °C | Days above 30 °C | Days below 0 °C |
|---|---|---|---|---|---|---|---|---|
| January | 6.7 °C | -3.1 °C | 1.7 °C | 20.4 °C | -14.1 °C | 0 | 0 | 26 |
| February | 9.7 °C | -0.6 °C | 4.6 °C | 25.7 °C | -12.4 °C | 0 | 0 | 16 |
| March | 14.7 °C | 4.3 °C | 9.5 °C | 29.2 °C | -6.4 °C | 1 | 0 | 4 |
| April | 21.2 °C | 10.6 °C | 15.9 °C | 36.0 °C | -1.1 °C | 7 | 1 | 0 |
| May | 26.7 °C | 16.4 °C | 21.4 °C | 37.0 °C | 6.1 °C | 21 | 7 | 0 |
| June | 30.5 °C | 21.0 °C | 25.6 °C | 39.4 °C | 12.8 °C | 28 | 18 | 0 |
| July | 31.3 °C | 24.1 °C | 27.5 °C | 40.6 °C | 17.9 °C | 30 | 21 | 0 |
| August | 30.2 °C | 23.2 °C | 26.4 °C | 37.5 °C | 14.2 °C | 29 | 17 | 0 |
| September | 26.8 °C | 18.3 °C | 22.3 °C | 36.7 °C | 9.7 °C | 22 | 4 | 0 |
| October | 22.0 °C | 12.2 °C | 16.9 °C | 33.8 °C | 2.0 °C | 7 | 0 | 0 |
| November | 15.0 °C | 5.1 °C | 9.9 °C | 26.7 °C | -13.0 °C | 0 | 0 | 3 |
| December | 8.6 °C | -1.2 °C | 3.5 °C | 20.6 °C | -16.9 °C | 0 | 0 | 20 |
Rain, sun and wind month by month
| Month | Rainfall | Wet days | Daylight | Cloud cover | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 23 mm | 4 | 10 h/day | 51 % | 66 % | 13 km/h |
| February | 28 mm | 5 | 11 h/day | 57 % | 66 % | 15 km/h |
| March | 43 mm | 6 | 12 h/day | 60 % | 66 % | 16 km/h |
| April | 49 mm | 6 | 13 h/day | 59 % | 65 % | 17 km/h |
| May | 79 mm | 7 | 14 h/day | 63 % | 65 % | 16 km/h |
| June | 134 mm | 8 | 14 h/day | 64 % | 68 % | 15 km/h |
| July | 236 mm | 15 | 14 h/day | 67 % | 80 % | 14 km/h |
| August | 158 mm | 14 | 13 h/day | 61 % | 82 % | 13 km/h |
| September | 79 mm | 8 | 12 h/day | 56 % | 74 % | 13 km/h |
| October | 49 mm | 5 | 11 h/day | 50 % | 67 % | 14 km/h |
| November | 35 mm | 5 | 10 h/day | 48 % | 68 % | 14 km/h |
| December | 20 mm | 3 | 9.9 h/day | 46 % | 67 % | 14 km/h |
Where Suzhou ranks
| Ranking | Position | Value |
|---|---|---|
| Places with the best weather in Asia in October | 20th of 50 | 97/100 |
| Places with the best weather in the world in October | 21st of 50 | 97/100 |
Planning a trip? See the best time to visit Suzhou.
QuestionsCommon questions about Suzhou’s climate
When is the best time to visit Suzhou?
That depends on what you want, so the honest answer is a comparison rather than a single month. May, September, October sit closest to 20 °C on average, July is the warmest month and December the driest. The month-by-month table above has the full picture.
How hot does Suzhou get?
In July, the warmest month, daily highs average 31 °C. About 67 days a year pass 30 °C. The highest value in the 1991–2020 record is 41 °C.
How cold does it get in winter?
Nights average -3.1 °C in January, the coldest month. A normal year has 69 nights below freezing.
Which month is wettest in Suzhou?
July, averaging 236 mm over 15 days with rain. The driest month is December with 20 mm. The year as a whole averages 933 mm.
Are these figures a forecast?
No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Suzhou rather than what any particular week will bring. Individual years can differ substantially from the normal.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Data point
- 33.636°, 116.979° (the coordinates the reanalysis values are taken for)
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.