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Changsha, China climate
Cfa Humid subtropical
Changsha has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 34°C, while the coldest is January averaging around 3°C at night. Precipitation totals about 1506 mm a year and is strongly seasonal — June alone averages 241 mm while December barely receives 55 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsChangsha climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 12 | 16 | 22 | 27 | 30 | 34 | 33 | 28 | 23 | 18 | 12 |
| Avg temp (°C) | 6 | 8 | 12 | 18 | 23 | 27 | 30 | 29 | 25 | 19 | 14 | 8 |
| Avg low (°C) | 3 | 5 | 9 | 15 | 19 | 23 | 26 | 25 | 21 | 16 | 10 | 5 |
| Precipitation (mm) | 82 | 89 | 153 | 184 | 211 | 241 | 157 | 108 | 88 | 62 | 76 | 55 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 12 | 16 | 22 | 27 | 30 |
| Avg temp (°C) | 6 | 8 | 12 | 18 | 23 | 27 |
| Avg low (°C) | 3 | 5 | 9 | 15 | 19 | 23 |
| Precipitation (mm) | 82 | 89 | 153 | 184 | 211 | 241 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 34 | 33 | 28 | 23 | 18 | 12 |
| Avg temp (°C) | 30 | 29 | 25 | 19 | 14 | 8 |
| Avg low (°C) | 26 | 25 | 21 | 16 | 10 | 5 |
| Precipitation (mm) | 157 | 108 | 88 | 62 | 76 | 55 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 13 | 13 | 17 | 16 | 16 | 14 | 10 | 10 | 9 | 9 | 10 | 10 |
| Days with high ≥ 32°C (days) | — | — | 0.1 | 0.9 | 4 | 9 | 19 | 16 | 6 | 0.5 | — | — |
| Days with low ≤ 0°C (days) | 7 | 2 | 0.3 | — | — | — | — | — | — | — | 0.2 | 3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 13 | 13 | 17 | 16 | 16 | 14 |
| Days with high ≥ 32°C (days) | — | — | 0.1 | 0.9 | 4 | 9 |
| Days with low ≤ 0°C (days) | 7 | 2 | 0.3 | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 10 | 9 | 9 | 10 | 10 |
| Days with high ≥ 32°C (days) | 19 | 16 | 6 | 0.5 | — | — |
| Days with low ≤ 0°C (days) | — | — | — | — | 0.2 | 3 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 77 | 78 | 77 | 77 | 79 | 71 | 68 | 67 | 67 | 63 | 64 |
| Clear days (≤ 30% cloud) | 5 | 3 | 3 | 3 | 4 | 2 | 4 | 4 | 6 | 7 | 8 | 8 |
| Partly cloudy days (30–70%) | 5 | 6 | 6 | 6 | 5 | 6 | 8 | 10 | 7 | 6 | 6 | 6 |
| Cloudy days (≥ 70%) | 21 | 20 | 22 | 21 | 22 | 22 | 19 | 17 | 17 | 18 | 17 | 17 |
| Relative humidity (%) | 78 | 78 | 80 | 80 | 81 | 84 | 83 | 82 | 78 | 75 | 76 | 75 |
| Wind speed (km/h) | 7.3 | 8.1 | 8.5 | 8.5 | 7.9 | 7.4 | 8.0 | 6.8 | 6.8 | 7.1 | 7.0 | 7.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 77 | 78 | 77 | 77 | 79 |
| Clear days (≤ 30% cloud) | 5 | 3 | 3 | 3 | 4 | 2 |
| Partly cloudy days (30–70%) | 5 | 6 | 6 | 6 | 5 | 6 |
| Cloudy days (≥ 70%) | 21 | 20 | 22 | 21 | 22 | 22 |
| Relative humidity (%) | 78 | 78 | 80 | 80 | 81 | 84 |
| Wind speed (km/h) | 7.3 | 8.1 | 8.5 | 8.5 | 7.9 | 7.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 71 | 68 | 67 | 67 | 63 | 64 |
| Clear days (≤ 30% cloud) | 4 | 4 | 6 | 7 | 8 | 8 |
| Partly cloudy days (30–70%) | 8 | 10 | 7 | 6 | 6 | 6 |
| Cloudy days (≥ 70%) | 19 | 17 | 17 | 18 | 17 | 17 |
| Relative humidity (%) | 83 | 82 | 78 | 75 | 76 | 75 |
| Wind speed (km/h) | 8.0 | 6.8 | 6.8 | 7.1 | 7.0 | 7.2 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 24 years of daily observations at Changsha, a weather station, about 11 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.