When visiting Chiang Mai, Chiang Rai and the rest of northern Thailand one of the first questions you ask is what the weather will be like and how it may affect my trip. Thailand has a seasonal rhythm typical of tropical areas, which is a dry season without rain, which is associated with high temperatures, a rainy season.
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HOW IS THE CLIMATE IN CHIANG MAI, CHIANG RAI AND NORTHERN THAILAND?
The most common time of year for rain in Chiang Mai, Chiang Rai and the rest of northern Thailand is usually from June to the end of November. At this time we can find sporadic rain, with some intensity and usually in the afternoon. These rains are not continuous as there are many sunny days as well. The normal thing is that during the day we enjoy during our excursions of the sun or at the most a cloudy day to finish the day with some cloudburst. In the high zones as Pai or Mae Hong Son the rains can be more continuous since they are high zones and with valleys.
Average temperatures (ºC) and monthly rainfall (mm.) in Chiang Mai
Historical of temperatures and rainfall in Chiang MaiFrom October to February we would have an intermediate season where at night it no longer rains so much but the temperatures drop a lot… it is what is known colloquially as winter. This season at night and first thing in the morning is usually colder than normal and it is normal to find fog banks, especially in the high areas with river valleys.
Average temperatures (ºC) and monthly rainfall (mm) in Chiang Rai:
Historical temperatures and rainfall in Chiang Rai
Already in February and until May we have the hottest and driest time in northern Thailand. At this time the temperatures are very high, especially at midday.
Average temperatures (ºC) and monthly rainfall (mm) in Pai:
History of temperatures and rainfall in PaiConsult the following links if you want to know what time you will have during the next days in the area:
Weather forecast in Chiang Mai for the next 7 days
The best time to enjoy the mountains of northern Thailand, trekking, rafting, visiting waterfalls and rivers is from December to February. The vegetation is green and fresh and the rivers bring plenty of water.
In the dry season we must understand that in the absence of rain the whole environment will be drier and the rivers or waterfalls will bring less flow. This time of year also coincides with the burning of pastures. In this season there are usually some days where due to the amount of grass being burned there may be problems with smoke or fog.
In the cold season, or rather in that tropical winter that Thailand can have, it is advisable to take some light warm clothes. This time of year also coincides with the flowering and harvesting of the tea which makes the intermediate parts of the mountains brimming with colour.
If you are riding on a motorbike always have a coat and raincoat at hand, unless you are riding in the very dry season.