Jian climate
Jian (Jiangxi, China) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 19 °C66 °F, and about 1,643 mm65 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Jian climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 1253 | 135 | 744 | 732.9 | 11 |
| Feb | 1559 | 540 | 1050 | 913.6 | 5 |
| Mar | 1967 | 948 | 1457 | 1726.8 | 1 |
| Apr | 2576 | 1458 | 1967 | 1957.7 | 0 |
| May | 2883 | 1967 | 2475 | 2419.5 | 0 |
| Jun | 3086 | 2373 | 2780 | 27211 | 0 |
| Jul | 3290 | 2577 | 2984 | 1636.4 | 0 |
| Aug | 3290 | 2476 | 2883 | 1285.0 | 0 |
| Sep | 3085 | 2169 | 2577 | 893.5 | 0 |
| Oct | 2577 | 1558 | 2068 | 562.2 | 0 |
| Nov | 2067 | 948 | 1458 | 1014.0 | 0 |
| Dec | 1356 | 236 | 846 | 622.5 | 9 |
| Year | 3290 | 135 | 1966 | 1,64365 | 26 |
“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 | 80% | 75% | 1.9 | 10:36 |
| Feb | 81% | 78% | 2.2 | 11:12 |
| Mar | 80% | 79% | 2.7 | 11:56 |
| Apr | 81% | 79% | 3.5 | 12:47 |
| May | 82% | 80% | 3.9 | 13:28 |
| Jun | 85% | 82% | 4.1 | 13:50 |
| Jul | 83% | 72% | 5.3 | 13:41 |
| Aug | 83% | 68% | 4.9 | 13:05 |
| Sep | 82% | 65% | 4.0 | 12:17 |
| Oct | 79% | 59% | 3.3 | 11:28 |
| Nov | 79% | 62% | 2.6 | 10:46 |
| Dec | 77% | 62% | 2.2 | 10:26 |
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 Jian is like
The warmest month is July, with an average high of 32 °C90 °F and a low of 25 °C77 °F. The coldest is January, when highs average 12 °C53 °F and lows 1 °C35 °F. Seasons are strongly marked: the warmest month is on average 22.2 °C40 °F warmer than the coldest.
It is wet, with about 1,643 mm65 in of precipitation per year. The wettest three-month stretch is April–June, which brings 43% of the annual total. The wettest month is June (272 mm11 in), the driest is October (56 mm2.2 in).
Relative humidity ranges from 77% in December to 85% in June. The clearest skies (lowest average cloud amount, 59%) are typical of October. Average wind speed near the ground ranges from 6 km/h (4 mph) in August to 8 km/h (5 mph) in April. Daylight lasts from about 10.4 hours in December to 13.8 hours in June.
Best time to visit Jian
Based on these averages, the most comfortable months for sightseeing and outdoor activities are October: average highs of 25 °C77 °F to 25 °C77 °F with 56 mm2.2 in to 56 mm2.2 in of precipitation per month.
The most challenging month is June, which is hot, with average highs of 30 °C86 °F, very wet (272 mm11 in) and humid (85% relative humidity).
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.
What to pack for Jian
- Winter (December–February) — highs 1253 to 15 °C59 °F, lows 135 to 5 °C40 °F, about 75 mm3.0 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 1967 to 28 °C83 °F, lows 948 to 19 °C67 °F, about 203 mm8.0 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and a good rain jacket or umbrella and quick-drying shoes.
- Summer (June–August) — highs 3086 to 32 °C90 °F, lows 2373 to 25 °C77 °F, about 188 mm7.4 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 2067 to 30 °C85 °F, lows 948 to 21 °C69 °F, about 82 mm3.2 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
How Jian compares
Compared with Xinyu, about 77 km to the north, Jian is on average 0.6 °C1.1 °F warmer and receives a similar amount of precipitation. The difference is largest in February (1 °C1.9 °F warmer).
Of the 547 places in China covered by World Climates, Jian is the 107th warmest by annual mean temperature and the 67th 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: Montgomery (United States, Cfa), Columbus (United States, Cfa) and Jackson (United States, Cfa).
Nearby places
- Xinyu 77 km · 18 °C65 °F · 1,712 mm67 in
- Yichun 98 km · 18 °C65 °F · 1,734 mm68 in
- Pingxiang 124 km · 18 °C65 °F · 1,667 mm66 in
- Ganzhou 141 km · 19 °C67 °F · 1,518 mm60 in
- Fuzhou 163 km · 18 °C65 °F · 1,788 mm70 in
- Jianchang 171 km · 19 °C67 °F · 1,882 mm74 in
- Guankou 176 km · 18 °C65 °F · 1,656 mm65 in
- Nanchang 194 km · 18 °C65 °F · 1,697 mm67 in
Frequently asked questions
What is the warmest month in Jian?
July is the warmest month in Jian, with an average high of 32 °C (90 °F) and an average low of 25 °C (77 °F).
What is the coldest month in Jian?
January is the coldest month, with an average high of 12 °C (53 °F) and an average low of 1 °C (35 °F).
When does it rain the most in Jian?
June is the wettest month with about 272 mm (10.7 in) of precipitation; October is the driest with about 56 mm (2.2 in).
What is the best time to visit Jian?
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 — 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.
The grid cell’s average elevation is 141 m, while Jian lies at about 72 m. Temperatures on this page were therefore adjusted by +0.4 °C0.8 °F using the standard lapse rate of 6.5 °C per 1,000 m.