Climate
Based on the data shown on Central Weather Bureau of Taiwan, the chart below shows the monthly mean precipitation in millimeters on Yushan from 1971 to 2000.
Average annual rainfall in the Yushan area is about 3,600 mm. It rains an average of 140 days per year, mostly between May and August. From May until the first part of June is plum rain season or monsoon season. Taiwan's typhoon season roughly falls between July and September. The peak month is in August. Overall speaking, summers are wet and winters relatively dry in Yushan.
Yushan has an alpine climate (Köppen ET). From September to April, the Yushan area is often covered with frost. However, due to strong wind, the frost level is not high, except in the valleys. At elevations above 2,000 meters, there is snow. At elevations of 3,000 meters or more, there are four consecutive months of snow accumulation. The first snow may appear in October and completely melts by May. Snow falls 24.3 days per year on average on Yushan, which is less than in the previous ten years. At lower elevations, snow may fall only 0.6 days per year. Snow mostly falls in January and February.
| Climate data for Yushan (1971–2000) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average high °C (°F) | 2.9 (37.2) |
2.7 (36.9) |
5.0 (41.0) |
7.6 (45.7) |
9.8 (49.6) |
11.6 (52.9) |
13.2 (55.8) |
12.7 (54.9) |
12.6 (54.7) |
12.5 (54.5) |
9.8 (49.6) |
5.8 (42.4) |
8.85 (47.93) |
| Average low °C (°F) | −5 (23) |
−4.1 (24.6) |
−2.1 (28.2) |
0.3 (32.5) |
2.5 (36.5) |
3.9 (39.0) |
4.2 (39.6) |
4.1 (39.4) |
3.5 (38.3) |
2.4 (36.3) |
0.2 (32.4) |
−2.8 (27.0) |
0.59 (33.1) |
| Precipitation mm (inches) | 116.0 (4.567) |
148.9 (5.862) |
138.9 (5.469) |
248.9 (9.799) |
454.2 (17.882) |
513.3 (20.209) |
361.5 (14.232) |
499.4 (19.661) |
257.2 (10.126) |
152.7 (6.012) |
77.8 (3.063) |
85.6 (3.37) |
3,054.4 (120.252) |
| % humidity | 68.8 | 78.3 | 80.0 | 81.6 | 84.6 | 83.4 | 79.0 | 83.6 | 80.1 | 73.8 | 67.6 | 65.9 | 77.2 |
| Mean monthly sunshine hours | 191.7 | 139.4 | 158.5 | 143.8 | 130.5 | 137.8 | 181.1 | 155.0 | 164.9 | 198.8 | 200.8 | 198.8 | 2,001.1 |
| Source: Central Weather Bureau | |||||||||||||
Read more about this topic: Yushan (mountain)
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