Nanchang climate
Nanchang (Jiangxi, China) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 18 °C65 °F, and about 1,697 mm67 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Nanchang climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 1151 | 133 | 642 | 753.0 | 12 |
| Feb | 1457 | 438 | 947 | 1054.1 | 6 |
| Mar | 1864 | 846 | 1355 | 1766.9 | 1 |
| Apr | 2474 | 1456 | 1965 | 2108.3 | 0 |
| May | 2882 | 1966 | 2374 | 2188.6 | 0 |
| Jun | 3086 | 2373 | 2679 | 32213 | 0 |
| Jul | 3290 | 2578 | 2984 | 1857.3 | 0 |
| Aug | 3289 | 2577 | 2883 | 1124.4 | 0 |
| Sep | 3085 | 2169 | 2577 | 803.2 | 0 |
| Oct | 2577 | 1558 | 2068 | 542.1 | 0 |
| Nov | 1966 | 947 | 1457 | 993.9 | 0 |
| Dec | 1254 | 236 | 745 | 602.3 | 8 |
| Year | 3290 | 133 | 1865 | 1,69767 | 27 |
“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 | 77% | 72% | 2.1 | 10:30 |
| Feb | 78% | 75% | 2.4 | 11:08 |
| Mar | 79% | 76% | 3.0 | 11:55 |
| Apr | 80% | 76% | 3.8 | 12:49 |
| May | 80% | 78% | 4.2 | 13:34 |
| Jun | 85% | 83% | 4.2 | 13:58 |
| Jul | 84% | 72% | 5.4 | 13:48 |
| Aug | 83% | 68% | 5.1 | 13:10 |
| Sep | 79% | 62% | 4.2 | 12:17 |
| Oct | 74% | 58% | 3.5 | 11:25 |
| Nov | 75% | 60% | 2.7 | 10:41 |
| Dec | 74% | 60% | 2.3 | 10:19 |
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 Nanchang is like
The warmest month is July, with an average high of 32 °C90 °F and a low of 25 °C78 °F. The coldest is January, when highs average 11 °C51 °F and lows 1 °C33 °F. Seasons are strongly marked: the warmest month is on average 23.1 °C41.6 °F warmer than the coldest.
It is wet, with about 1,697 mm67 in of precipitation per year. The wettest three-month stretch is April–June, which brings 44% of the annual total. The wettest month is June (322 mm13 in), the driest is October (54 mm2.1 in).
Relative humidity ranges from 74% in December to 85% in June. The clearest skies (lowest average cloud amount, 58%) are typical of October. Average wind speed near the ground ranges from 7 km/h (4 mph) in August to 9 km/h (6 mph) in February. Daylight lasts from about 10.3 hours in December to 14.0 hours in June.
Best time to visit Nanchang
Based on these averages, the most comfortable months for sightseeing and outdoor activities are October. Average highs then reach 25 °C77 °F to 25 °C77 °F. Precipitation is 54 mm2.1 in to 54 mm2.1 in per month.
The most challenging month is June, which is very wet (322 mm13 in) and humid (85% relative humidity).
Comfort score: months are ranked by how close they come to an ideal. That means 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.
Nanchang weather by month
- January11 °C51 °F / 1 °C33 °F
- February14 °C57 °F / 4 °C38 °F
- March18 °C64 °F / 8 °C46 °F
- April24 °C74 °F / 14 °C56 °F
- May28 °C82 °F / 19 °C66 °F
- June30 °C86 °F / 23 °C73 °F
- July32 °C90 °F / 25 °C78 °F
- August32 °C89 °F / 25 °C77 °F
- September30 °C85 °F / 21 °C69 °F
- October25 °C77 °F / 15 °C58 °F
- November19 °C66 °F / 9 °C47 °F
- December12 °C54 °F / 2 °C36 °F
What to pack for Nanchang
- Winter (December–February) — highs 1151 to 14 °C57 °F, lows 133 to 4 °C38 °F, about 80 mm3.1 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
- Spring (March–May) — highs 1864 to 28 °C82 °F, lows 846 to 19 °C66 °F, about 202 mm7.9 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and a good rain jacket or umbrella and quick-drying shoes.
- Summer (June–August) — highs 3086 to 32 °C90 °F, lows 2373 to 25 °C78 °F, about 207 mm8.1 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and a good rain jacket or umbrella and quick-drying shoes.
- Autumn (September–November) — highs 1966 to 30 °C85 °F, lows 947 to 21 °C69 °F, about 78 mm3.1 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses.
How Nanchang compares
The nearest larger place is Wuhan, about 261 km to the northwest. Compared with it, Nanchang is on average 0.5 °C0.9 °F warmer. It receives 27% more precipitation (1,697 mm67 in vs 1,332 mm52 in). The difference is largest in February (1.4 °C2.6 °F warmer).
World Climates covers 547 places in China. By annual mean temperature, Nanchang is the 132nd warmest of them. By annual precipitation, it is the 56th wettest. See all of them on the China climate page.
Some places in other countries have a very similar pattern of temperature and rainfall. The closest matches are Montgomery (United States, Cfa), Jackson (United States, Cfa) and Tuscaloosa (United States, Cfa).
Nearby places
- Climate in Jinfeng 88 km · 19 °C66 °F · 1,867 mm74 in
- Climate in Fuzhou 93 km · 18 °C65 °F · 1,788 mm70 in
- Climate in Jiujiang 114 km · 18 °C64 °F · 1,781 mm70 in
- Climate in Yingtan 123 km · 19 °C66 °F · 1,867 mm74 in
- Climate in Wuxue 133 km · 17 °C63 °F · 1,683 mm66 in
- Climate in Xinyu 133 km · 18 °C65 °F · 1,712 mm67 in
- Climate in Jianchang 147 km · 19 °C67 °F · 1,882 mm74 in
- Climate in Jingdezhen 148 km · 18 °C64 °F · 1,927 mm76 in
Frequently asked questions
What is the warmest month in Nanchang?
July is the warmest month in Nanchang. Its average high is 32 °C (90 °F) and its average low is 25 °C (78 °F).
What is the coldest month in Nanchang?
January is the coldest month. Its average high is 11 °C (51 °F) and its average low is 1 °C (33 °F).
When does it rain the most in Nanchang?
June is the wettest month with about 322 mm (12.7 in) of precipitation. October is the driest with about 54 mm (2.1 in).
What is the best time to visit Nanchang?
Judging by long-term averages, the most comfortable months are 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. The gaps are largest 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.