Climate and monthly weather forecastChanthaburi, Thailand

The climate of Chanthaburi

Chanthaburi, situated in the eastern region of Thailand, harbors a predominant Am or Tropical monsoon climate according to Köppen climate classification. The monthly average temperature ranges from 21.4°C (70.5°F) at its coldest, and escalates up to 33.9°C (93°F) at its hottest. A substantial level of humidity accompanies these temperatures, between 66% and 86% relative humidity. Rainfall is significantly variable from month to month, presenting a highly wet climate from May to September with over 393mm (15.47") of monthly average rainfall and a relatively dry climate between December and April with less than 55mm (2.17") of rainfall on an average. A trend is evident in the number of rainfall days, echoing the monthly rainfall numbers.

A unique characteristic in the weather pattern of Chanthaburi is the striking transition between the wet and dry periods. From February's 36mm (1.42") rainfall, there's a drastic increase to 393mm (15.47") in May. Similarly, contrasting months can be seen both in terms of temperature and daylight, indicating Chanthaburi’s tropical monsoon climate.

The best time to visit Chanthaburi

Given the Tropical monsoon climate, flourishing periods in Chanthaburi coincide with the lesser rainfall months. The period from December to February is ideal for visitation, where temperatures stay relatively cooler, between 21.4°C (70.5°F) to 32.7°C (90.9°F), and rainfall dwindles as low as 19mm (0.75") in December to 36mm (1.42") in February. Days in these months also include about 11.5 to 11.7 daylight hours, enabling ample time for outdoor activities and exploration.

The worst time to visit Chanthaburi

On the contrary, the months of May to September should be avoided if possible, as heavy rainfall characterizes this phase. Average rainfall is at peak, as high as 513mm (20.2") in June, contributing to about 24 to 26 rainy days per month. The damp condition also leads to high relative humidity touching 83% to 86%, and temperatures can reach up to 33.9°C (93°F).

Spring weather in Chanthaburi

Chanthaburi does not have a Spring season in the conventional sense due to its Tropical monsoon climate. Rather, this period from March to May marks the transitional phase towards the rainy season. Average temperatures execute a steady climb from 32.6°C (90.7°F) to 33.9°C (93°F), and the rainfall sees a rapid rise from 72mm (2.83") to 393mm (15.47"). Days lengthen slightly from 12.1 hours to 12.7 daylight hours.

Summer weather in Chanthaburi

The summer in Chanthaburi, essentially its rainy season, spans from June to September. The region witnesses increased rainfall, hitting a high of 513mm (20.2") in June. The number of rainy days hovers around 24 to 26 days. Despite the continuous downpour, temperatures remain high at around 31.8°C (89.2°F) to 32.8°C (91°F) with soaring humidity levels.

Autumn weather in Chanthaburi

Much like Spring, Fall is undefined in Chanthaburi. Post-September, the area begins to dry out with rainfall decreasing from 298mm (11.73") to 55mm (2.17"), leading into a relatively drier season. Temperatures ease down slightly from 31.4°C (88.5°F) to 32°C (89.6°F) and humidity drops visibly with daylight decreasing marginally.

Winter weather in Chanthaburi

The winter period in Chanthaburi ranges from December to February, characterized by minimal rainfall and moderate temperatures. The average lowest temperature of the year at 21.4°C (70.5°F) is observed in December whereas high temperature averages around 32.6°C (90.7°F) in winter. Rainfall lightens up drastically with the driest month being December at 7mm (0.28"). An average of 11.4 to 11.7 daylight hours defines a typical winter day in Chanthaburi.

Weather in January

January ushers in the new year with warm, humid conditions in Chanthaburi, featuring wiping winds that bring a breath of freshness from the Gulf of Thailand. While the weather remains decidedly warm, January offers a relatively dry climate with only two days of rainfall on average. Weather in January »

Weather in February

Moving into February, the weather continues to heat up in Chanthaburi, with humidity levels rising simultaneously. Conditions are pleasant, but the city starts to see an increase in rainfall, signaling the onset of the wet season. Weather in February »

Weather in March

March signals the transition from dry to wet weather in Chanthaburi, with a noticeable growth in humidity and rainfall, which becomes a recurring feature of the city's weather. The days are longer, and the temperature consistently warm, facilitating the blossoming of local flora. Weather in March »

Weather in April

April marks the onset of the heaviest rainfall in Chanthaburi, as the city witnesses an increased frequency of showers. Temperature levels remain constant, and the tropical heat combines with high humidity to form a steamy climate typical of a wet season in Southeast Asia. Weather in April »

Weather in May

In May, Chanthaburi is comfortably nestled in the wet season, with the city experiencing regular, intense showers as part of daily life. The humid backdrop, coupled with high temperatures, provide the perfect growth conditions for the abundant tropical foliage in the region. Weather in May »

Weather in June

Come June, Chanthaburi endures the apex of its rainy season with the highest rainfall and the greatest number of rainy days. Climatic conditions are largely uniform, with high humidity levels and constant temperature, mirroring the weather of the preceding months. Weather in June »

Weather in July

July in Chanthaburi signifies a gradual transition towards the end of the wet season, albeit with the city still receiving plenty of rain. Temperatures and humidity continue to hold steady, while daylight hours reduce marginally from the previous months. Weather in July »

Weather in August

August reflects the eventual ebbing of the wet season, with the city of Chanthaburi experiencing an incremental drop in rainfall amounts. Weather conditions hold steady without any drastic fluctuation in temperature or humidity. Weather in August »

Weather in September

September in Chanthaburi is marked by a noticeable reduction in rain, signaling the city's progression towards the dry season. The days get shorter and the humidity starts to recede, albeit slowly. A drop in average rainfall to 498mm (19.61") in September, finally marks a noticeable change from the wet season. Weather in September »

Weather in October

By October, the rainfall in Chanthaburi has significantly reduced, marking the end of the customary wet season in the city. Temperatures retain their warmth, while humidity sees a small dip. October records an average rainfall of just 298mm (11.73"), a clear deviation from the persistent heavy rains of recent months. Weather in October »

Weather in November

Entering November, Chanthaburi basks in the dry season, bringing an end to the humid, rainy months. The city sees a significant decline in rainfall and humidity, and a marginal drop in temperature. The drastic decrease to an average rainfall of 55mm (2.17") in November brings a sense of relief and marks the onset of the tourist season. Weather in November »

Weather in December

December sees Chanthaburi into the heart of the dry season, featuring several days of sunshine and minimal rainfall. Lower humidity and relatively cool temperatures provide the perfect backdrop for a variety of outdoor activities. Weather in December »