Beijing Climate & Terrain

Beijing has a rather dry, monsoon-influenced humid continental climate (Koppen climate classification Dwa), characterised by hot, humid summers due to the East Asian monsoon, and generally cold, windy, dry winters that reflect the influence of the vast Siberian anticyclone.[41] Spring can bear witness to sandstorms blowing in from the Mongolian steppe, accompanied by rapidly warming, but generally dry, conditions. Autumn, like spring, sees little rain, but is crisp and short. The monthly daily average temperature in January is -3.7 °C (25.3 °F), while in July it is 26.2 °C (79.2 °F). Precipitation averages around 570 mm (22.4 in) annually, with the great majority of it falling in the summer months. Extremes have ranged from -27.4 to 42.6 °C (-17 to 109 °F).

Climate data for Beijing (1971-2000)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Average high °C (°F) 1.8
(35.2)
5.0
(41.0)
11.6
(52.9)
20.3
(68.5)
26.0
(78.8)
30.2
(86.4)
30.9
(87.6)
29.7
(85.5)
25.8
(78.4)
19.1
(66.4)
10.1
(50.2)
3.7
(38.7)
17.9
(64.2)
Average low °C (°F) -8.4
(16.9)
-5.6
(21.9)
0.4
(32.7)
7.9
(46.2)
13.6
(56.5)
18.8
(65.8)
22.0
(71.6)
20.8
(69.4)
14.8
(58.6)
7.9
(46.2)
0.0
(32.0)
-5.8
(21.6)
7.2
(45.0)
Precipitation mm (inches) 2.7
(0.106)
4.9
(0.193)
8.3
(0.327)
21.2
(0.835)
34.2
(1.346)
78.1
(3.075)
185.2
(7.291)
159.7
(6.287)
45.5
(1.791)
21.8
(0.858)
7.4
(0.291)
2.8
(0.11)
571.8
(22.512)
%humidity 44 44 46 46 53 61 75 77 68 61 57 49 56.8
Avg. precipitation days (>= 0.1 mm) 1.8 2.3 3.3 4.3 5.8 9.7 13.6 12.0 7.6 5.0 3.5 1.7 70.6
Mean monthly sunshine hours 194.1 194.7 231.8 251.9 283.4 261.4 212.4 220.9 232.1 222.1 185.3 180.7 2,670.8
Source: China Meteorological Administration

Xian Climate & Terrain

Xi'an has a temperate, semi-arid climate (Koppen BSk) influenced by the East Asian monsoon. The Wei River valley is characterised by hot, humid summers and cold, dry winters. Spring and autumn are somewhat brief and dry. Xi'an receives most of its annual precipitation from August to late October in the form of rain. Snow occasionally falls in winter but rarely settles for long. Dust storms often occur during March and April as the city rapidly warms up. Summer months also experience frequent but short thunderstorms. Monthly mean temperatures range from around the freezing mark in January to 26.6 °C (79.9 °F) in July, with an annual average of 13.7 °C (56.7 °F). Extreme temperatures have ranged from -20.6 °C (-5 °F) to 42.9 °C (109 °F).

Climate data for Xi'an (1971-2000)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Average high °C (°F) 4.8
(40.6)
8.3
(46.9)
13.9
(57.0)
21.0
(69.8)
26.1
(79.0)
31.2
(88.2)
32.1
(89.8)
30.8
(87.4)
25.3
(77.5)
19.5
(67.1)
12.2
(54.0)
6.4
(43.5)
19.3
(66.7)
Average low °C (°F) -3.8
(25.2)
-1.1
(30.0)
3.6
(38.5)
9.5
(49.1)
14.2
(57.6)
19.2
(66.6)
21.9
(71.4)
20.9
(69.6)
15.9
(60.6)
9.9
(49.8)
2.9
(37.2)
-2.5
(27.5)
9.2
(48.6)
Precipitation mm (inches) 6.9
(0.272)
9.6
(0.378)
28.6
(1.126)
43.0
(1.693)
60.2
(2.37)
54.4
(2.142)
98.6
(3.882)
70.8
(2.787)
91.6
(3.606)
59.9
(2.358)
23.9
(0.941)
5.8
(0.228)
553.3
(21.783)
humidity 66 63 66 67 68 62 71 75 79 77 74 69 69.8
Avg. precipitation days (≥ 0.1 mm) 3.6 4.4 6.9 8.4 8.9 9.0 10.0 9.1 10.9 9.7 6.0 3.4 90.3
Mean monthly sunshine hours 100.8 103.2 120.8 147.9 171.4 185.3 191.9 195.4 127.0 111.1 98.4 92.8 1,646.0
Source: China Meteorological Administration

Chengdu Climate & Terrain

Chengdu has a monsoon-influenced humid subtropical climate, and is largely mild and humid. It has four distinct seasons, blessed with abundant rainfall, and relieved from both sweltering summers and freezing winters. Its favorable climate contributes to the development of agriculture and animal husbandry, making Chengdu a comfortable place for sustained human habitat.

The Qin Mountains to the far north help shield the city from cold Siberian winds in the winter; because of this, the short winter is milder than in the Lower Yangtze. January averages 5.6 °C (42.1 °F) Snow is rare but there are a few periods of frost each winter. The summer is hot and humid, but not to the extent of the "Three Furnaces" cities of Wuhan, Nanjing, and Chongqing, all which lie in the Yangtze basin. July and August average around 25 °C (77 °F), with afternoon highs sometimes reaching 33 °C (91 °F); sustained heat in the likes of some cities in Southeastern China is rare. Rainfall is common year-round but is the greatest in July and August, with very little of it in the cooler months. Chengdu also has one of the lowest sunshine totals in China (less sunshine annually than London), and most days are cloudy and overcast even if without rain. This is especially so in the winter months, when it is typically interminably grey and dreary, compounding the poor air quality. Spring (March-April) tends to be sunnier and warmer than autumn (October–November). Extremes have ranged from −5.9 °C (21 °F) to 40.0 °C (104.0 °F).

Climate data for Chengdu (1971−2000)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Average high °C (°F) 9.3
(48.7)
11.2
(52.2)
15.9
(60.6)
21.7
(71.1)
26.0
(78.8)
28.0
(82.4)
29.5
(85.1)
29.7
(85.5)
25.2
(77.4)
20.6
(69.1)
15.8
(60.4)
10.7
(51.3)
20.3
(68.5)
Average low °C (°F) 2.8
(37.0)
4.7
(40.5)
8.2
(46.8)
12.9
(55.2)
17.2
(63.0)
20.5
(68.9)
22.0
(71.6)
21.7
(71.1)
18.6
(65.5)
14.6
(58.3)
9.5
(49.1)
4.5
(40.1)
13.1
(55.6)
Precipitation mm (inches) 7.9
(0.311)
12.1
(0.476)
20.0
(0.787)
44.2
(1.74)
78.5
(3.091)
106.8
(4.205)
224.5
(8.839)
201.1
(7.917)
118.8
(4.677)
35.2
(1.386)
15.9
(0.626)
5.2
(0.205)
870.2
(34.26)
% humidity 83 81 79 78 76 81 86 85 85 85 83 84 82.2
Avg. precipitation days (≥ 0.1 mm) 7.0 8.5 10.9 13.0 14.7 15.2 17.6 15.8 15.6 13.1 7.7 5.2 144.3
Mean monthly sunshine hours 53.3 51.4 83.1 113.9 121.7 117.2 131.9 155.0 77.6 59.4 57.2 51.6 1,073.3
Source: China Meteorological Administration

Lhasa Climate & Terrain

Due to its very high elevation, Lhasa has a cool semi-arid climate with frosty winters and mild summers, yet the valley location protects the city from intense cold or heat and strong winds. The city enjoys nearly 3,000 hours of sunlight annually and is thus sometimes called the "sunlit city" by Tibetans. The coldest month is January with an average temperature of −1.6 °C (29.1 °F) and the warmest month is June with a daily average of 16.0 °C (60.8 °F), though nights have generally been warmer in July. The annual mean temperature is 7.98 °C (46.4 °F), with extreme temperatures ranging from −16.5 to 30.4 °C (2 to 87 °F). Lhasa has an annual precipitation of 426 millimetres (16.8 in) with rain falling mainly in July, August and September. The driest month is January at 0.8 millimetres (0.03 in) and the wettest month is August, at 120.6 millimetres (4.75 in). The rainy season is widely regarded the "best" of the year as rains come mostly at night and Lhasa is still sunny during the daytime.

Climate data for Lhasa (1971−2000)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Average high °C (°F) 7.2
(45.0)
9.3
(48.7)
12.7
(54.9)
15.9
(60.6)
19.9
(67.8)
23.2
(73.8)
22.6
(72.7)
21.4
(70.5)
19.9
(67.8)
17.0
(62.6)
12.1
(53.8)
8.0
(46.4)
15.8
(60.4)
Average low °C (°F) −9
(15.8)
−5.8
(21.6)
−2.1
(28.2)
1.5
(34.7)
5.6
(42.1)
9.8
(49.6)
10.4
(50.7)
9.7
(49.5)
7.7
(45.9)
2.0
(35.6)
−4.2
(24.4)
−8.2
(17.2)
1.5
(34.7)
Precipitation mm (inches) .8
(0.031)
1.2
(0.047)
2.9
(0.114)
6.1
(0.24)
27.7
(1.091)
71.2
(2.803)
116.6
(4.591)
120.6
(4.748)
68.3
(2.689)
8.8
(0.346)
1.3
(0.051)
1.0
(0.039)
426.5
(16.791)
% humidity 28 26 27 37 44 51 62 66 63 49 38 34 43.8
Avg. precipitation days (≥ 0.1 mm) .7 1.0 1.6 4.3 9.9 14.3 19.1 20.0 15.4 4.5 .7 .6 92.1
Mean monthly sunshine hours 250.9 226.7 246.1 248.9 276.6 257.3 227.4 219.6 229.0 281.7 267.4 258.6 2,990.2
Source: China Meteorological Administration