Climate and monthly weather forecast
Prachuap Khiri Khan, Thailand

Prachuap Khiri Khan, positioned in Thailand, experiences a predominant Köppen climate classification denoted as Aw. This type of climate widely refers to a tropical wet and dry or savanna climate. Throughout the year, the weather patterns are dictated by a vivid juxtaposition of hot temperatures, humidity levels that rarely deviate beyond the 70% to 78% range, and a variability in rainfall.

Average high temperatures cluster around 30.4°C (86.7°F) to 34°C (93.2°F), with the warmth slightly intensifying from March to May, establishing this period as the hottest of the year. Low temperatures, steadying themselves primarily between 20.6°C (69.1°F) and 25.3°C (77.5°F), illustrate a moderate climate with not much of a dip at any time of the year.

The humidity remains reasonably steady, with just a slight uptick during the month of September at 78%. Rainfall in Prachuap Khiri Khan displays a significantly pronounced pattern, soaring from a negligible 15mm (0.59") in December, peaking to a substantial 228mm (8.98") in October. Correspondingly, the number of rainfall days also increases from a minimum of three days in January and December to a maximum of 20 days in August.

At the same time, daylight hours exhibit subtle oscillations over the months, ranging from 11.4 hours in December to a peak of 12.8 hours in June, providing plenty of sunlight throughout the year. This array of climatic factors makes Prachuap Khiri Khan a distinct tropical paradise, characterized by warm temperatures, reasonable humidity, and significant variability in rainfall.

With the tropical savanna climate of Prachuap Khiri Khan, the superior time to visit hinges on individual weather preferences. However, given the region's climate patterns, December and January emerge as the most favorable months. The average high temperatures hover around a comfortable 30.4°C (86.7°F) to 30.8°C (87.4°F) while lows are at a mild 20.6°C (69.1°F) to 21.2°C (70.2°F). Daylight hours during these months, at 11.4 to 11.5 hours, offer ample brightness. Combined with modest rainfall of 15mm (0.59") to 24mm (0.94") on only three to four days, these months are ideal for tourists seeking to circumvent the scorching heat or heavy rainfall.

In contrast, the monsoon season, particularly from July through October, may present some challenges to smooth travel or outdoor adventures. October is marked by the heaviest rainfall of the year registering at 228mm (8.98") across 16 days. Temperatures during these months, although not exceedingly high ranging from 31.3°C (88.3°F) to 32.5°C (90.5°F), coupled with relative humidity peaking at 78% in September, may result in discomfort for some individuals.

Springtime in Prachuap Khiri Khan, from March to May, witnesses a steady increase in average high temperatures, ascending from 32.5°C (90.5°F) to reach a peak of 34°C (93.2°F). Corresponding low temperatures also climb, moving from 23.4°C (74.1°F) up to 25.3°C (77.5°F). Rainfall begins to show a noticeable upswing during these months, especially in May, when it surges to 127mm (5") from a comparatively mild 72mm (2.83") in April. This period initiates the onset of the tropical wet season in Prachuap Khiri Khan.

Summer, from June to August, retains continued warmth, with high temperatures oscillating between 32.5°C (90.5°F) and 33.5°C (92.3°F) and lows shifting from 25.3°C (77.5°F) to 25°C (77°F). Rainfall and humidity during this period reach some of their highest levels. Rainfall extends from a significant 86mm (3.39") in June to an even more considerable 99mm (3.9") in August, spread across 17 to 20 days. Corresponding daylight hours are at their longest, ranging from 12.7 hours to 12.8 hours, offering ample daytime.

During the autumn months, September through November, the average high temperatures gradually recede from 32.3°C (90.1°F) to 30.9°C (87.6°F), and lows adjust from 24.6°C (76.3°F) to 23°C (73.4°F), indicating a slight cooling trend. September registers the highest relative humidity of the year at 78%, but the rainfall reaches its pinnacle in October with a staggering 228mm (8.98") across 16 days. The daylight duration decreases marginally from 12.2 hours to 11.6 hours during this period.

The winter months, namely December and January, offer an amicable climate in Prachuap Khiri Khan. High temperatures ensure a warm atmosphere, fluctuating between 30.4°C (86.7°F) and 30.8°C (87.4°F). Lower temperatures range from 20.6°C (69.1°F) to 21.2°C (70.2°F), further enhancing the pleasant conditions. These months also feature the least amount of rainfall, measuring only 15mm (0.59") to 24mm (0.94") over three to four days. Approximately 11.5 hours of daylight during these months ensure ample sunshine. The lower humidity levels, around 70% to 75%, combined with mild temperatures and minimal rainfall, constitute this period as the most comfortable season.

The start of the year in Prachuap Khiri Khan, Thailand, presents relatively low temperatures, humidity and a moderate amount of rainfall. Average high temperatures remain close to 30.8°C (87.4°F), while the minimum temperature averagely stands around 20.6°C (69.1°F). Weather in January »

The transition from January to February presents a gradual rise in the heat. It means that the Prachuap Khiri Khan weather in February becomes slightly hotter without any significant increase in humidity. February also experiences a decrease in the rainfall to 22mm (0.87") thus reducing the wetness in the environment and allowing inhabitants to enjoy the outdoors more. Weather in February »

March comes with a major jump in rainfall to 72mm (2.83"), over 3 times that of the previous month. Despite the increase in the amount of rainfall, the number of rainy days does not considerably increase, remaining at just four days, making the weather feel more humid than wet. Weather in March »

The weather continues to heat up in Prachuap Khiri Khan by April as it witnesses the highest average low and high temperatures from 25°C (77°F) to 34°C (93.2°F). With the increase in temperatures, the amount of rainfall also amplifies to 56mm (2.2"), although falling over only five days, thereby making the environment warm and humid. Weather in April »

May does not see a relentless rise in temperature as April but rather a consistency in warmth. There's a significant rise in rainfall, the highest so far, going up to 127mm (5"), distributed across 14 days. It causes an increase in relative humidity to 77%, leading to a humid, almost wet, environment. Weather in May »

June marks a sustained level in terms of temperature while experiencing a slight drop in rainfall to 86mm (3.39") across a slightly more number of rainy days standing at 17. This occurrence maintains the humid warmth in the area. Notably, this is the month with the longest daylight hours at 12.8, giving residents and tourists alike a chance to squeeze in more daytime activities. Weather in June »

July's climate is similar to that of June, with consistent average high and low temperatures from 24.9°C (76.8°F) to 32.5°C (90.5°F). An increase in rainfall to 109mm (4.29") makes Prachuap Khiri Khan's July weather even more wet and humid than the previous month. Weather in July »

In August, the region experiences a consistent average low temperature, along with a slight drop in the average high temperature to 32.1°C (89.8°F). Prachuap Khiri Khan's weather in August undergoes a small dip in rainfall amount but doesn’t mirror this in terms of rainy days which is on par with July. Weather in August »

September witnesses a slight decrease in temperatures. However, it experiences the highest relative humidity of the year at 78%, creating a warm and damp environment. Prachuap Khiri Khan weather in September also registers a minor increase in rainfall accumulation to 100mm (3.94"). Weather in September »

October turns out to be the wettest month of the year with rainfall accumulation reaching a high of 228mm (8.98"), over twice that of the preceding months. Approximately 16 days of rainfall in October amount to a soaking environment. Weather in October »

Prachuap Khiri Khan weather in November observes a significant shift, marking the departure from the rainy months. Despite a slight drop in average temperatures, the reduction in rainfall to 155mm (6.1") and in the number of rainy days to 10 signals the end of frequent showers. Weather in November »

December ends the year in Prachuap Khiri Khan with the least rainfall volume at 15mm (0.59"), falling over a span of merely three days. It marks the beginning of a distinctly dry period, different from the wet months that just passed. Weather in December »