Climate Chart of Chiang Mai, Thailand

Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023

For Chiang Mai, Thailand, the climate data cover 2013–2023. Monthly mean temperatures average 25.8 °C, with the coolest monthly mean in January at 21.8 °C and the warmest in April at 29.3 °C. Across the same period, mean daily rainfall is 4.40 mm/day, while mean daily sunshine is 9.38 hours/day. These figures offer a broad guide to the annual pattern, but monthly means smooth over day-to-day conditions and do not describe what any particular visit will bring.

Climate overview

Temperature

January has the lowest monthly mean temperature, at 21.8 °C, while the highest monthly mean occurs in April at 29.3 °C. These are averages for each month, not daytime highs, so they describe the broad temperature level rather than the full range visitors may experience within a day. The unweighted mean across the calendar-month means is 25.8 °C. It provides a useful annual reference, but does not mean temperatures remain near that value throughout the year or on every day.

Rain

Mean daily rainfall is lowest in March, at 0.43 mm/day, and highest in August, at 11.09 mm/day. These are daily mean amounts associated with each month, not monthly rainfall totals; neither value tells you how often rain falls or whether a particular day will be wet. The unweighted mean of the monthly daily-rainfall means is 4.40 mm/day. It is an annual summary rather than a forecast, so visitors should still prepare for changing conditions, especially when planning around the month with the highest mean.

Sunshine

Mean daily sunshine reaches its highest level in both March / April, at 10.80 hours/day, and falls to its lowest in August, at 7.11 hours/day. These monthly averages can help with broad outdoor-planning expectations, but sunshine duration is not the same as day length and does not guarantee clear skies on a given day. Across the calendar months, the unweighted mean daily sunshine duration is 9.38 hours/day. Treat it as a general reference for the period, rather than a promise of the sunshine available during any particular itinerary.

Best Travel Time Guide for Chiang Mai, Thailand: Ideal Seasons and Weather Insights

For visitors prioritising lower average rainfall, March is a conditional option: its mean daily rainfall is 0.43 mm/day. This does not guarantee dry days or show how frequently rain occurs, so keep flexible plans and check conditions close to travel. If cooler monthly average temperatures are the priority, consider January, when the monthly mean is 21.8 °C; this is not a daytime maximum and cannot describe every day's temperatures. For greater average sunshine duration, March / April records 10.80 hours/day, which may be useful when planning outdoor sightseeing, though it does not guarantee clear weather.

Pack rain protection if travelling in August, when mean daily rainfall is 11.09 mm/day. That average does not specify the timing or frequency of wet weather, but is a reason to allow for possible rain in outdoor plans. Mean daily sunshine is lowest in August at 7.11 hours/day; use this as a planning guide, not as a measure of daylight hours or a forecast for individual days.

Climate Data Overview for Chiang Mai, Thailand

Explore the comprehensive climate data for Chiang Mai, Thailand. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.

Month	Average: Temperature °C	Rain (mm) / day	Sunshine (h) / day
Jan	21.8	0.75	9.71
Feb	24.2	0.69	10.59
Mar	27.6	0.43	10.80
Apr	29.3	1.87	10.80
May	29.0	4.61	10.42
Jun	27.3	6.48	8.80
Jul	26.4	9.39	7.36
Aug	26.0	11.09	7.11
Sep	26.0	9.98	8.55
Oct	25.3	4.98	9.15
Nov	24.4	1.75	9.66
Dec	22.1	0.75	9.60
Average	25.8	4.40	9.38