Xi’an, China climate
BSk Cold semi-arid
Xi’an has a strongly seasonal mild-temperate climate (Cold semi-arid, Köppen BSk). The hottest month is July with an average daily high near 33°C, while the coldest is January averaging around −3°C at night. Precipitation totals about 543 mm a year and is strongly seasonal — July alone averages 96 mm while January barely receives 7 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 countsXi’an climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 10 | 15 | 22 | 27 | 32 | 33 | 31 | 26 | 19 | 13 | 7 |
| Avg temp (°C) | 1 | 5 | 10 | 16 | 21 | 26 | 28 | 26 | 21 | 15 | 8 | 2 |
| Avg low (°C) | −3 | 0 | 5 | 11 | 16 | 20 | 23 | 21 | 17 | 10 | 4 | −2 |
| Precipitation (mm) | 7 | 8 | 27 | 36 | 51 | 64 | 96 | 84 | 80 | 62 | 21 | 7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 10 | 15 | 22 | 27 | 32 |
| Avg temp (°C) | 1 | 5 | 10 | 16 | 21 | 26 |
| Avg low (°C) | −3 | 0 | 5 | 11 | 16 | 20 |
| Precipitation (mm) | 7 | 8 | 27 | 36 | 51 | 64 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 33 | 31 | 26 | 19 | 13 | 7 |
| Avg temp (°C) | 28 | 26 | 21 | 15 | 8 | 2 |
| Avg low (°C) | 23 | 21 | 17 | 10 | 4 | −2 |
| Precipitation (mm) | 96 | 84 | 80 | 62 | 21 | 7 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 2 | 2 | 3 | 4 | 4 | 5 | 5 | 5 | 6 | 5 | 3 | 2 |
| Days with high ≥ 32°C (days) | — | — | — | 0.3 | 3 | 10 | 12 | 8 | 2 | — | — | — |
| Days with low ≤ 0°C (days) | 16 | 9 | 2 | 0.0 | — | — | — | — | — | 0.1 | 4 | 14 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 2 | 2 | 3 | 4 | 4 | 5 |
| Days with high ≥ 32°C (days) | — | — | — | 0.3 | 3 | 10 |
| Days with low ≤ 0°C (days) | 16 | 9 | 2 | 0.0 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 5 | 5 | 6 | 5 | 3 | 2 |
| Days with high ≥ 32°C (days) | 12 | 8 | 2 | — | — | — |
| Days with low ≤ 0°C (days) | — | — | — | 0.1 | 4 | 14 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 56 | 64 | 69 | 69 | 72 | 71 | 67 | 65 | 69 | 64 | 52 | 50 |
| Clear days (≤ 30% cloud) | 8 | 5 | 4 | 4 | 4 | 3 | 4 | 5 | 6 | 7 | 10 | 11 |
| Partly cloudy days (30–70%) | 10 | 9 | 9 | 9 | 8 | 9 | 10 | 10 | 6 | 7 | 8 | 9 |
| Cloudy days (≥ 70%) | 13 | 14 | 18 | 17 | 19 | 17 | 16 | 16 | 18 | 17 | 12 | 11 |
| Relative humidity (%) | 59 | 58 | 54 | 50 | 49 | 51 | 59 | 61 | 65 | 64 | 63 | 59 |
| Wind speed (km/h) | 5.1 | 5.9 | 6.3 | 6.4 | 6.2 | 5.7 | 5.5 | 5.5 | 5.3 | 4.7 | 5.0 | 5.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 56 | 64 | 69 | 69 | 72 | 71 |
| Clear days (≤ 30% cloud) | 8 | 5 | 4 | 4 | 4 | 3 |
| Partly cloudy days (30–70%) | 10 | 9 | 9 | 9 | 8 | 9 |
| Cloudy days (≥ 70%) | 13 | 14 | 18 | 17 | 19 | 17 |
| Relative humidity (%) | 59 | 58 | 54 | 50 | 49 | 51 |
| Wind speed (km/h) | 5.1 | 5.9 | 6.3 | 6.4 | 6.2 | 5.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 67 | 65 | 69 | 64 | 52 | 50 |
| Clear days (≤ 30% cloud) | 4 | 5 | 6 | 7 | 10 | 11 |
| Partly cloudy days (30–70%) | 10 | 10 | 6 | 7 | 8 | 9 |
| Cloudy days (≥ 70%) | 16 | 16 | 18 | 17 | 12 | 11 |
| Relative humidity (%) | 59 | 61 | 65 | 64 | 63 | 59 |
| Wind speed (km/h) | 5.5 | 5.5 | 5.3 | 4.7 | 5.0 | 5.0 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 18 years of daily observations at Xian, a weather station, about 5 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.