Climate and monthly weather forecast
Chumphon, Thailand

Situated in the tropical monsoon zone according to the Köppen climate classification, Chumphon, Thailand, experiences a relatively constant tropical climate throughout the year. Its geographical location provides a climate marked by high temperatures and abundant rainfall. The average high temperature ranges from 30.1°C (86.2°F) to 34.5°C (94.1°F), with the peak occurring in the middle of the year, while the average low temperature fluctuates between 21.4°C (70.5°F) and 24.7°C (76.5°F).

Regarding precipitation, Chumphon records between 45mm (1.77") and 288mm (11.34") of rainfall in a month, with the wettest month usually in October, seeing up to 288mm (11.34") of rain. Conversely, February is the driest month with an average of 45mm (1.77") of rain. As expected, there is a substantial increase in the number of rainy days from 5 days a month to 23 days a month as the year progresses, with the maximum number of rainy days towards the end of the year.

The relative humidity in Chumphon is quite high, hovering between 78% and 85% throughout the year. Daylight hours also remain relatively consistent, with a marginal increase from 11.5 hours a day to peak at 12.7 hours a day in June and July. The weather pattern shows a clear division of the seasons into two main periods: a wet season with copious rainfall and a dry season.

The most favourable time to visit Chumphon would be during the driest months of the year from February to April. During this time, the average rainfall is significantly low, ranging from as little as 45mm (1.77") in February up to 86mm (3.39") in April. There are fewer rainy days with a decrease in the overall humidity, and the daylight hours increase to 12.4 hours a day by April, making outdoor activities significantly more enjoyable.

The worst time to visit Chumphon would arguably be the rainy season, particularly from September to November. The rainfall reaches its peak in October and November with an average of 252mm (9.92") and 288mm (11.34"), respectively. The number of rainy days per month also increases with up to 20 days in September and 16 days in November respectively. Consequently, excessively wet conditions and overcast skies may hamper outdoor activities and sightseeing plans during these months.

Characterized by increasing temperatures and a gradual rise in precipitation, the spring season in Chumphon, from March to May, records temperatures ranging from 24.5°C (76.1°F) to 34.5°C (94.1°F). Rainfall starts to increase during this period, starting from 97mm (3.82") in March to a significant 191mm (7.52") in May. Alongside, the number of rainy days increases from 5 days in March to 18 days in May, however, daylight hours also increase, reaching up to 12.6 hours per day in May.

The summer months in Chumphon, extending from June to August, do not deviate greatly from the constant tropical conditions. Average temperatures remain on the higher end, ranging from 31.6°C (88.9°F) to 32.3°C (90.1°F), and the lowest temperature recorded lies between 24.3°C (75.7°F) and 24.6°C (76.3°F). This period also marks the start of substantial rainfall, with monthly averages ranging from 167mm (6.57") to 208mm (8.19"). The number of rainy days per month increases to between 20 and 23 days, even as daylight hours peak at 12.7 hours.

The autumn season from September to November in Chumphon experiences a considerable amount of rainfall. With rainfall ranging from 178mm (7.01") to 288mm (11.34") and between 16 to 20 rainy days per month, it is the wettest season of the year. Temperatures remain high but relatively less oppressive compared to the summer, peaking at around 31.6°C (88.9°F) to 31.2°C (88.2°F). The minimum temperatures hover around 23.7°C (74.7°F) to 24.1°C (75.4°F) and daylight is around 12.2 hours to 11.7 hours per day.

The winter climate in Chumphon, between December and February, is marked by a gradual decrease in both rainfall and temperatures. Average high temperatures drop to the lowest point of the year, ranging from 30.1°C (86.2°F) to 30.9°C (87.6°F), and average low temperatures range from 21.4°C (70.5°F) to 22.2°C (72°F). Rainfall decreases significantly to between 45mm (1.77") and 123mm (4.84"), with 6 to 9 rainy days per month. This season also witnesses slightly reduced daylight hours ranging from 11.5 hours to 11.8 hours per day.

Famous for having the highest relative humidity of the entire year, January in Chumphon, Thailand is damp, to say the least. The moisture in the air does not deter outdoor activities as the climate remains relatively mild. It carries remnants of December’s cool conditions while ushering in the warmth of the coming months. Weather in January »

As Chumphon transitions from January into February, the region witnesses subtle shifts in weather patterns. The slight reprieve in humidity noticed in January continues, promising comfortable days for exploring the natural beauty the city has to offer. Weather in February »

The Thai city of Chumphon ushers in spring with sultrier conditions in March. It is a time when the city starts to steadily warm up, signaling the onset of summers. Tourists will find changing landscapes with flora blossoming and fauna thriving. Weather in March »

April in Chumphon signifies the peak of summer heat, with the city witnessing a gradual rise in temperatures. While the daytime temperature may feel a bit too warm to some, the nights bring a moderate coolness to balance it out. The month records rainfall of 86mm (3.39") over 8 days of downpour, suggesting frequent but heavier showers keeping the foliage fresher than ever. Weather in April »

Substantial rainfall is a telling characteristic of May in Chumphon. While the mercury levels remain fairly steady, the moisture content begins to rise. The month stands out for having the highest recorded rainfall of the year, with showers pouring in a colossal 191mm (7.52"). Weather in May »

Chumphon experiences a considerable dampness in the atmosphere during June, coupled with steadily high temperatures. It's a month when rains continue to keep the city wet, but with a reduced intensity from May's peak rainfalls. The city shines under the longest daylight duration of the year, stretching for up to 12.7 hours. Weather in June »

With the humidity and rainfall slightly exceeding June's values, July in Chumphon is a month of prevailing showers. It is common to spot rainclouds rolling in from the sea, adding an element of drama to the 21 rainy days. Meanwhile, the temperatures seem to take a backseat, hovering in their usual hot range. Weather in July »

Despite August marking the middle of the rainy season in Chumphon, the climatic conditions hold their ground. The temperature and humidity remain stable, staying faithful to the patterns followed during the previous months. Rain gods shower their bounty on the city quite frequently with rainfall clocking in at 208mm (8.19"), spread across 23 days. Weather in August »

As rains begin to subside a notch in September, the weather in Chumphon starts showing signs of the impending dry spell. The atmospheric conditions remain decidedly tropical, dominated by warmth and moisture. The period marks the end of peak rainfall while introducing the city dwellers to the slightly lower daily temperatures of autumn. Weather in September »

October’s weather in Chumphon sees another uptick in rainfall, defying the tapering off that begins in September. With a sizable 252mm (9.92") of rain dispersed over 20 soaking days, the city gets saturated thoroughly. A cautious decrease in daily temperature and an increase in relative humidity paint a picture of cool, wet days. Weather in October »

Distinguished by being the month with the highest amount of rainfall of the year, November records a sizeable 288mm (11.34") spread over 16 days. However, Chumphon doesn’t let this dampened weather impact its zeal. The dense rainfall doesn't deter visitors or locals from taking in the city's beauty. Weather in November »

Weather in December brings Chumphon’s rainfall saga to a conclusive dip, registering just 123mm (4.84") over 9 days. Marking the beginning of the cooler period, December sees the city in a different light, all prepared to wrap up the year on a modest note. Weather in December »