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Daguanshan Tunnel

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Daguanshan Tunnel Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Daguanshan Tunnel year round climate

  • Spring (March–May): Average 63–72°F, warm and dry climate with low rainfall. Common activities: Hiking, sightseeing. Recommended clothing: Light long-sleeved clothing, light jacket.
  • Summer (June–August): Average 76–79°F, hot climate with moderate rainfall. Common activities: Summer recreation, night stargazing. Recommended clothing: Breathable clothing, short sleeves, hat.
  • Autumn (September–November): Average 66–76°F, pleasant climate, more rainfall in October. Common activities: Viewing maple leaves (if applicable), outdoor activities. Recommended clothing: Comfortable long-sleeved clothing, light jacket.
  • Winter (December–February): Average 58–62°F, mild and dry climate with very little rainfall. Common activities: Suitable for low-altitude hiking. Recommended clothing: Warm clothing, jacket.

Daguanshan Tunnel climatological average

Annual average temperature: approx. 69.8°F / Annual rainfall: approx. 112 mm / Summer humidity: 60%–70% / Rainiest month: October

Daguanshan Tunnel monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
58.1°F
1.4
February
62.2°F
1.5
March
63.7°F
1.4
April
72.7°F
2.5
May
72°F
7.6
June
76.8°F
6.4
July
79.5°F
16.5
August
77.4°F
6.3
September
76.6°F
13.8
October
71.8°F
44.2
November
66.9°F
9.5
December
59.4°F
1

Daguanshan Tunnel weather for the next seven days

7/17
Friday
Sunny
88.2°F/63.5°F
7/18
Saturday
Sunny
88.2°F/63.9°F
7/19
Sunday
Sunny
86.9°F/64.2°F
7/20
Monday
Patchy rain nearby
84.2°F/63.7°F
7/21
Tuesday
Partly Cloudy
84.8°F/62.6°F
7/22
Wednesday
Patchy rain nearby
85.2°F/61.6°F
7/23
Thursday
Partly Cloudy
85.1°F/62.4°F

Daguanshan Tunnel Frequently Asked Questions and Useful Information for Travel

Where is Daguanshan Tunnel located?

Daguanshan Tunnel is located at kilometer 142 of the Southern Cross-Island Highway, with a total length of 615 meters and an altitude of 2722.39 meters, making it Taiwan's highest altitude tunnel. It's approximately 160 meters higher than the Hehuanshan Tunnel on Provincial Highway 8. On the east side of the tunnel, there is a place name marker for 'Yankou'. Geographically, this is the lowest saddle between Guanshan and Xiangyang Mountain in the Central Mountain Range.

Why was the Southern Cross-Island Highway closed?

After the Southern Cross-Island Highway was reopened, due to the large volume of traffic, the Ministry of Transportation implemented traffic control measures for some sections to protect the surrounding scenery from being damaged by excessive crowds.

What is 'Yankou'?

'Yankou' refers to a relatively narrow and low-lying pass between two mountains, usually the lowest point of a ridgeline, shaped like a saddle. It often serves as an important passage for crossing mountains or entering mountainous areas, effectively shortening travel distance. For example, the Southern Cross-Island Highway Yankou is a famous place name.

What are the recommended attractions near Daguanshan Tunnel?

Daguanshan Tunnel itself is one of the representative scenic spots of the Southern Cross-Island Highway, with rich natural landscapes in the surrounding area. Visitors can experience the magnificent mountain forest scenery and seas of clouds here. For exploring along the Southern Cross-Island Highway, the western section has Baolai Hot Springs, Meishan Visitor Center, Zhongzhiguan Trail, Tianchi, and Huigu Shenmu. The eastern section has Rìlì Village, Moyanling, Wulu Canyon, and Xiangyang National Forest Recreation Area, offering diverse attractions.

What are the suggestions for visiting Daguanshan Tunnel?

You can plan a road trip along the Southern Cross-Island Highway to visit Daguanshan Tunnel and admire the ever-changing scenery along the way. You can choose to travel from west to east or from east to west to experience rich landforms such as mountains, seas of clouds, hot springs, and canyons. Please pay attention to the traffic control information for the Southern Cross-Island Highway and plan your trip accordingly to successfully reach and appreciate the unique scenery of Daguanshan Tunnel.