Health & medical care
Living through the hot and rainy seasons
Thailand's general seasonal pattern and practical preparation for hot weather and outings.
Start with these three things
- TMD's general divisions are a hot season from around mid-February to mid-May, a rainy season from around mid-May to mid-October, and a cool season from around mid-October to mid-February.
- The seasons do not change on the same date every year. Rainfall patterns also differ between northern and southern Thailand.
- In hot weather, help prevent heat illness by adjusting indoor temperature, seeking shade, taking breaks and drinking fluids regularly.
Steps
"Tip" marks a planning suggestion, not an official rule.
- Tip Before leaving, check the day's Chiang Mai forecast, warnings and road conditions along your route.
- Tip Build in breaks somewhere cool instead of filling the day with outdoor activities.
- Use a hat or parasol, rest frequently in the shade and avoid excessive heat indoors too.
- Tip If rain is expected, prepare alternatives such as shortening the outing or moving it to another day.
- Tip Share your expected return time and contact arrangements with family or companions before leaving.
What to prepare
Planning tips (not official rules)
- Prepare drinks, sun protection, rainwear and a waterproof bag according to your destination.
- Review phone charging, supplies of necessary medicines and conditions at home in case of a power cut or a day when you stay indoors.
Where to ask
Thai Meteorological Department (TMD) for weather / a medical provider for health concerns
Reception hours are not yet confirmed. Check with the office before visiting.
Things to watch for
- TMD explains that thunderstorms, gusty winds and sometimes hail can occur during the hot season. A dry season does not always mean you can leave rainwear behind.
- Follow your doctor's instructions if you have been given advice about fluid intake. Japan's Ministry of Health, Labour and Welfare explains that drinking a large amount of oral rehydration solution at once can sometimes lead to excessive sodium intake.
Planning tips (not official rules)
- If flooding or road closures are a concern, check official guidance from a safe place rather than pressing on to find a shortcut.
Separate seasonal patterns from today's weather
TMD's seasonal explanation describes broad patterns. The start of the rainy season varies, and northern Thailand generally becomes cooler and less rainy from around mid-October.
Planning tips (not official rules)
Use seasonal patterns for travel and family visits, and the latest forecast for daily decisions. Do not judge mountain or rural conditions from the city forecast alone; check information from your destination too.
Managing heat inside the home
Japan's Ministry of Health, Labour and Welfare advises adjusting indoor temperature with air conditioning or other means, checking room temperature regularly and drinking fluids even when you do not feel thirsty.
Older people need particular attention because they may notice heat and dehydration less readily.
Planning tips (not official rules)
Agree with household members on using cool rooms and places to rest. If you are concerned about a relative living alone, agree together on a manageable routine for staying in touch.
If someone becomes unwell
Move someone with suspected heat illness to a cool place and cool their body. If they cannot drink water unaided or are unconscious, seek emergency medical help immediately.
Planning tips (not official rules)
Be ready to give emergency services the building name, entrance and a way for staff to identify your location.
Preparing daily life for rain
Planning tips (not official rules)
List what prolonged rain could disrupt, such as the entrance, laundry, medical visits or shopping. Avoid places you find slippery, and check the day's availability and conditions for transport or deliveries.
Read the related guides on mosquito protection and flood preparedness. When checking weather or disaster notices, look at the issue time and the area covered so you can identify information relevant to your location.
Sources & dates checked
- OfficialThai Meteorological Department (TMD) ฤดูกาลของประเทศไทย
- OfficialMinistry of Health, Labour and Welfare of Japan 熱中症を防ぎましょう
- OfficialMinistry of Health, Labour and Welfare of Japan 熱中症が疑われる人を見かけたら