In January, Chiang Mai experiences cool and comfortable weather, especially on high mountains like Doi Inthanon, which is Thailand’s highest peak. Temperatures can drop to single digits, making it an ideal time to explore nature and experience the coldest weather of the year.

January Temperatures in the City and Mountains

In Chiang Mai city, the weather in January is quite cool and comfortable. Average temperatures in the morning and at night may be around 15-20 degrees Celsius. During the day, it gets slightly warmer but remains pleasant, not hot and humid like other periods.

For high mountains like Doi Inthanon summit or Wat Phra That Doi Suthep, the weather is much colder than in the city, especially in the early morning before sunrise. Temperatures on Doi Inthanon summit can drop below 10 degrees Celsius, and some days may even approach zero degrees Celsius, leading to the phenomenon of frost, or what locals call “Mae Khaab,” visible on the grass—a rare sight.

What to Pack for Exploring the City

For sightseeing in Chiang Mai city, suitable clothing includes long-sleeved shirts, long pants, or a light jacket. If it’s sunny during the day, it might get a bit warm, but it’s still more comfortable than during the rainy or extremely hot seasons.

What to Pack for a Mountain Trip

When visiting high mountains in January, it’s essential to pack extra warm clothes. We recommend dressing in layers so you can adjust to changing weather conditions throughout the day.

  1. Base Layer: Choose moisture-wicking clothing, such as thermal underwear or synthetic fabric shirts, to help maintain your body temperature.
  2. Mid Layer: Wear a fleece jacket or a thick sweater over your base layer for added warmth.
  3. Outer Layer: A windbreaker or a waterproof down jacket will provide excellent protection against the cold wind and moisture on the mountain top.
  4. Other Accessories: A woolen hat, scarf, and gloves are essential, especially if you plan to watch the sunrise or hike nature trails like Kew Mae Pan, which can be very windy and cold.
  5. Footwear: Comfortable, closed-toe shoes with good traction are recommended, as some paths may be uneven or damp.

Other Essentials to Carry

  • Sunscreen and Lip Balm: Even though the weather is cold, the sun on the mountains can be strong. Sunscreen will protect your skin, and lip balm will prevent chapped lips from the cold air and strong winds.
  • Personal Medication and Motion Sickness Pills: Many mountain routes, such as Doi Inthanon, involve a round trip of about 200 km with many curves. If you are prone to motion sickness, prepare medication in advance. Or choosing electric vs. gasoline cars: how the ride up the mountain differs for those prone to motion sickness may also help.
  • Power Bank: Cold weather can cause mobile phone batteries to drain faster than usual.

What to Know When Hiring a Private Driver to Doi Inthanon

The Doi Inthanon Full Day package involves hiring a car for 8–10 hours. Passengers can set their own departure time, with no fixed schedule, to suit their needs, such as wanting to see the morning sea of fog or making multiple stops without rushing.

What’s Included in the Package Price:

  • Driver, trip-long energy costs (no need to refuel), agreed-upon toll fees, insurance, cold drinking water, child seats (upon advance request), USB-C phone charging cable, and adjustable stop order within the agreed scope.

What’s Not Included:

  • Admission fees for attractions and national parks (e.g., Doi Inthanon National Park entrance fee), food and beverages, tips, licensed tour guide (if desired), overtime beyond the package (300 THB per hour).

Information to Provide When Booking:

  • Number of travelers, if there are young children requiring a child seat, and specific places you wish to visit, so the driver can plan the route and time accordingly.

Summary

Visiting Chiang Mai in January typically offers cool and comfortable weather, especially on high mountains where single-digit temperatures are possible. Preparing layered clothing, along with a hat, scarf, and gloves, will ensure an enjoyable and warm trip. Always check admission fees and opening hours before your journey.