The short answer
Most travel guides name November to February as the best time for hiking and camping in Thailand, because the air is cooler and drier. We use that window as the starting point for the destinations on this site.
Treat it as a pattern, not a promise. Weather varies by region and by year, so check the Thai Meteorological Department forecast and the park's own page before you book.
Cool season: November to February
This is the popular season for mountain trails and national parks. Mornings in the hills are cooler, and rain is less likely to spoil a multi-day plan.
Expect more visitors at popular parks, so check booking and opening details with the park early.
Hot and smoky: February to April (north)
In the upper north, the dry season is also burning season. Fires and haze peak around February and March, and parks have been closed in past years. Read our guide to camping in the north during burning season before you plan anything in these months.
Rainy season: roughly May to October
Travel sources describe the rainy months as green and good for waterfalls, but with heavy rain, especially in the central and northern regions. Trails can close at short notice after heavy rain, so look for park notices before you travel.
Our five destinations
- Khao Yai: October to February (about 205 km from Bangkok)
- Khao Kho: November to January
- Chiang Rai: November to January
- Mae Hong Son: November to January
- Nan: we have not set a season yet. Use the northern window and check for closures.
Sources
How this was written
Drafted with AI assistance from the official and press sources listed below. We add our own trip notes as we test routes. Rules and closures change, so always confirm with the park.
