Si Lanna National Park

Park Thai national park with waterfalls and evergreen forests

North of Chiang Mai, Si Lanna National Park covers forested hills, caves and the Mae Ngat reservoir. Visitors come for hiking, reservoir boating, waterfalls and nearby hill‑tribe villages.

Main image

Si Lanna National Park is a protected area in northern Thailand defined by wooded mountains, valleys and freshwater streams. The park covers a sizable area of upland forest and is valued for hiking, waterfalls and natural scenery.

Trails, waterfalls and forested viewpoints are among the park’s main attractions for day visitors and overnight trekkers. Birdwatching and short hikes to scenic viewpoints and streamside pools are common activities.

The area was set aside under Thailand’s system of national parks to conserve forested highlands and watershed areas. Over time management has focused on balancing visitor access with habitat protection.

The park sits in northern Thailand within the highland zone north of Thailand’s central plains, accessible from the nearest regional city. The landscape is mountainous with mixed evergreen and deciduous forest.

  • When to go: Best visited in the cool, dry season (roughly November to February) when trails and viewpoints are most comfortable and visibility is highest.
Si Lanna National Park
19.2822, 99.0911

How to Get to Si Lanna National Park #

From Chiang Mai, drive north on Route 107 toward Mae Taeng, then take local roads toward Si Lanna; the park entrance lies roughly a 1-1.5 hour drive (about 60-80 km) depending on traffic. Local minibuses and private drivers can be arranged from Chiang Mai city; the nearest major transit hub is Chiang Mai Bus Terminal 2.

Tips for Visiting Si Lanna National Park #

  • Arrive early morning to hike the Mae Ngao or Doi Pui Ngam trails before the heat and crowds.
  • Bring insect repellent in the rainy season; leech socks may be useful on damp trails.
  • Check with local park headquarters in Chiang Mai for permit requirements and updated trail conditions.

Best Time to Visit Si Lanna National Park #

Si Lanna National Park near Chiang Mai is best visited in the cool, dry months (Nov-Feb) for comfortable hiking and clearer skies.

Cool season
November-February · 12-24°C
Pleasant days and cool nights; best for hiking and birdwatching.
Hot season
March-May · 25-35°C
Lowland heat intensifies; higher elevations offer relief but trails are dusty.
Rainy season
June-October · 22-30°C
Lush forest, waterfalls at their fullest; trails can be slippery and some roads impassable.

Weather & Climate near Si Lanna National Park #

Climate

Si Lanna National Park's climate is classified as Humid Subtropical (Dry Winter) - Humid Subtropical (Dry Winter) climate with warm summers (peaking in April) and mild winters (coldest in January). Temperatures range from 9°C to 30°C. Abundant rainfall (1155 mm/year), wettest in August with a pronounced dry season.

Air Quality: AQI 83 Moderate
Best Time to Visit
FebruaryJanuaryMarch
Temperature & Rainfall
Temperature Range
41°
Warmest Month
Coldest Month
Monthly Conditions

January

January is the coolest month with highs of 24°C and lows of 9°C. The driest month with just 4 mm and mostly sunny skies.

93 Ideal

Comfort

17°
Feels Like Cool
17°C
Temperature
24°
71%
Humidity
Very Humid

Weather

4 mm
Rainfall
1.1 m/s
Wind
Calm
1.5
UV Index
High
11.0h daylight

February

February is mild with highs of 26°C and lows of 11°C. Light rainfall and mostly sunny skies.

95 Ideal

Comfort

19°
Feels Like Mild
19°C
Temperature
11° 27°
60%
Humidity
Humid

Weather

10 mm
Rainfall
1.1 m/s
Wind
Calm
1.8
UV Index
Very High
11.4h daylight

March

March is mild with highs of 29°C and lows of 14°C. Light rainfall and mostly sunny skies.

91 Ideal

Comfort

21°
Feels Like Mild
21°C
Temperature
14° 29°
55%
Humidity
Humid

Weather

22 mm
Rainfall
1.4 m/s
Wind
Calm
1.9
UV Index
Very High
11.9h daylight

April

April is the warmest month with highs of 30°C and lows of 17°C. Moderate rainfall (59 mm).

87 Excellent

Comfort

24°
Feels Like Mild
24°C
Temperature
17° 30°
59%
Humidity
Humid

Weather

59 mm
Rainfall
1.2 m/s
Wind
Calm
2.2
UV Index
Extreme
12.5h daylight

May

May is mild with highs of 28°C and lows of 18°C. Significant rainfall (176 mm) and mostly overcast skies.

67 Good

Comfort

23°
Feels Like Mild
23°C
Temperature
18° 28°
75%
Humidity
Very Humid

Weather

176 mm
Rainfall
1.4 m/s
Wind
Calm
2.2
UV Index
Extreme
12.9h daylight

June

June is mild with highs of 26°C and lows of 19°C. Significant rainfall (124 mm) and mostly overcast skies.

69 Good

Comfort

23°
Feels Like Mild
23°C
Temperature
19° 26°
81%
Humidity
Very Humid

Weather

124 mm
Rainfall
1.6 m/s
Wind
Calm
2.1
UV Index
Extreme
13.2h daylight

July

July is mild with highs of 26°C and lows of 19°C. Significant rainfall (169 mm) and mostly overcast skies.

65 Good

Comfort

22°
Feels Like Mild
22°C
Temperature
19° 26°
84%
Humidity
Very Humid

Weather

169 mm
Rainfall
1.3 m/s
Wind
Calm
2.0
UV Index
Extreme
13.1h daylight

August

August is mild with highs of 26°C and lows of 19°C. The wettest month with heavy rain (226 mm) and mostly overcast skies.

63 Good

Comfort

22°
Feels Like Mild
22°C
Temperature
19° 26°
87%
Humidity
Very Humid

Weather

226 mm
Rainfall
1.2 m/s
Wind
Calm
2.0
UV Index
Very High
12.7h daylight

September

September is mild with highs of 26°C and lows of 18°C. Significant rainfall (189 mm) and mostly overcast skies.

65 Good

Comfort

22°
Feels Like Mild
22°C
Temperature
18° 26°
86%
Humidity
Very Humid

Weather

189 mm
Rainfall
1.0 m/s
Wind
Calm
2.0
UV Index
Very High
12.1h daylight

October

October is mild with highs of 25°C and lows of 17°C. Significant rainfall (120 mm) and partly cloudy skies.

75 Very Good

Comfort

21°
Feels Like Mild
21°C
Temperature
17° 25°
85%
Humidity
Very Humid

Weather

120 mm
Rainfall
0.9 m/s
Wind
Calm
1.7
UV Index
Very High
11.6h daylight

November

November is mild with highs of 24°C and lows of 14°C. Moderate rainfall (43 mm).

87 Excellent

Comfort

19°
Feels Like Mild
19°C
Temperature
14° 24°
81%
Humidity
Very Humid

Weather

43 mm
Rainfall
1.0 m/s
Wind
Calm
1.6
UV Index
Very High
11.1h daylight

December

December is the coolest month with highs of 23°C and lows of 10°C. Light rainfall.

91 Ideal

Comfort

17°
Feels Like Cool
17°C
Temperature
11° 23°
77%
Humidity
Very Humid

Weather

13 mm
Rainfall
1.3 m/s
Wind
Calm
1.4
UV Index
High
10.9h daylight

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