Nantong climate
Nantong (Jiangsu, China) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 16 °C61 °F, and about 1,146 mm45 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Nantong climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 745 | −229 | 337 | 522.0 | 20 |
| Feb | 1050 | 032 | 541 | 602.4 | 14 |
| Mar | 1559 | 338 | 948 | 652.6 | 5 |
| Apr | 2170 | 948 | 1559 | 843.3 | 0 |
| May | 2680 | 1559 | 2169 | 833.3 | 0 |
| Jun | 3085 | 2067 | 2576 | 1676.6 | 0 |
| Jul | 3289 | 2476 | 2882 | 2058.1 | 0 |
| Aug | 3188 | 2475 | 2882 | 1626.4 | 0 |
| Sep | 2882 | 1966 | 2374 | 1094.3 | 0 |
| Oct | 2373 | 1355 | 1864 | 612.4 | 0 |
| Nov | 1762 | 744 | 1253 | 602.4 | 2 |
| Dec | 1049 | 032 | 541 | 381.5 | 15 |
| Year | 3289 | −229 | 1661 | 1,14645 | 56 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 78% | 63% | 2.3 | 10:16 |
| Feb | 79% | 66% | 2.7 | 11:00 |
| Mar | 77% | 64% | 3.8 | 11:54 |
| Apr | 75% | 67% | 4.6 | 12:56 |
| May | 73% | 72% | 4.8 | 13:47 |
| Jun | 77% | 77% | 4.4 | 14:14 |
| Jul | 83% | 74% | 4.6 | 14:03 |
| Aug | 83% | 66% | 4.7 | 13:19 |
| Sep | 81% | 65% | 4.0 | 12:19 |
| Oct | 76% | 59% | 3.3 | 11:19 |
| Nov | 77% | 57% | 2.5 | 10:28 |
| Dec | 77% | 55% | 2.2 | 10:04 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Nantong is like
The warmest month is July, with an average high of 32 °C89 °F and a low of 24 °C76 °F. The coldest is January, when highs average 7 °C45 °F and lows −2 °C29 °F. Seasons are strongly marked: the warmest month is on average 25.1 °C45.2 °F warmer than the coldest.
It is wet, with about 1,146 mm45 in of precipitation per year. The wettest three-month stretch is June–August, which brings 47% of the annual total. The wettest month is July (205 mm8.1 in), the driest is December (38 mm1.5 in).
Relative humidity ranges from 73% in May to 83% in July. The clearest skies (lowest average cloud amount, 55%) are typical of December. Average wind speed near the ground ranges from 9 km/h (5 mph) in October to 10 km/h (6 mph) in May. Daylight lasts from about 10.1 hours in December to 14.2 hours in June.
Best time to visit Nantong
Based on these averages, the most comfortable months for sightseeing and outdoor activities are April and May and October: average highs of 21 °C70 °F to 26 °C80 °F with 61 mm2.4 in to 84 mm3.3 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 7 °C45 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
Nantong weather by month
- January7 °C45 °F / −2 °C29 °F
- February10 °C50 °F / 0 °C32 °F
- March15 °C59 °F / 3 °C38 °F
- April21 °C70 °F / 9 °C48 °F
- May26 °C80 °F / 15 °C59 °F
- June30 °C85 °F / 20 °C67 °F
- July32 °C89 °F / 24 °C76 °F
- August31 °C88 °F / 24 °C75 °F
- September28 °C82 °F / 19 °C66 °F
- October23 °C73 °F / 13 °C55 °F
- November17 °C62 °F / 7 °C44 °F
- December10 °C49 °F / 0 °C32 °F
What to pack for Nantong
- Winter (December–February) — highs 745 to 10 °C50 °F, lows −229 to 0 °C32 °F, about 50 mm2.0 in of precipitation a month. Pack a warm coat, layers and closed shoes and shoes with good grip, as frost is common.
- Spring (March–May) — highs 1559 to 26 °C80 °F, lows 338 to 15 °C59 °F, about 77 mm3.0 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
- Summer (June–August) — highs 3085 to 32 °C89 °F, lows 2067 to 24 °C76 °F, about 178 mm7.0 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and an umbrella or light rain jacket.
- Autumn (September–November) — highs 1762 to 28 °C82 °F, lows 744 to 19 °C66 °F, about 77 mm3.0 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket.
How Nantong compares
Compared with Wuxi, about 76 km to the southwest, Nantong is on average 0.8 °C1.4 °F cooler and receives 6% less precipitation (1,146 mm45 in vs 1,220 mm48 in). The difference is largest in April (1.2 °C2.2 °F cooler).
Of the 547 places in China covered by World Climates, Nantong is the 261st warmest by annual mean temperature and the 208th wettest by annual precipitation. See all of them on the China climate page.
Places in other countries with the most similar temperature and rainfall pattern: Tulsa (United States, Cfa), Raleigh (United States, Cfa) and East Hampton (United States, Cfa).
Nearby places
- Zhangjiagang 37 km · 16 °C61 °F · 1,146 mm45 in
- Rugao 47 km · 15 °C60 °F · 1,113 mm44 in
- Jiangyin 59 km · 16 °C61 °F · 1,145 mm45 in
- Kunshan 73 km · 17 °C62 °F · 1,242 mm49 in
- Wuxi 76 km · 17 °C62 °F · 1,220 mm48 in
- Suzhou 85 km · 16 °C61 °F · 1,208 mm48 in
- Chongming 90 km · 17 °C62 °F · 1,256 mm49 in
- Baoshan 90 km · 17 °C62 °F · 1,242 mm49 in
Frequently asked questions
What is the warmest month in Nantong?
July is the warmest month in Nantong, with an average high of 32 °C (89 °F) and an average low of 24 °C (76 °F).
What is the coldest month in Nantong?
January is the coldest month, with an average high of 7 °C (45 °F) and an average low of -2 °C (29 °F).
When does it rain the most in Nantong?
July is the wettest month with about 205 mm (8.1 in) of precipitation; December is the driest with about 38 mm (1.5 in).
What is the best time to visit Nantong?
Judging by long-term averages, the most comfortable months are April and May and October.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.