The climate of Haikou
Present on the northern coast of Hainan Island,
Haikou, bears the humid subtropical climate, signified as Cwa within the Köppen climate classification framework. This type of climate characterizes hot and wet conditions for the majority of the year with distinctly drier winters.
Observing the climate information of Haikou, different weather parameters exhibit pronounced variation as the year progresses. From the data, the highest average temperatures tumble between 31.9°C (89.4°F) and 33.1°C (91.6°F) during the summer months of
May to
July, and
December offers the lowest average of around 22°C (71.6°F). The mild yet considerable range in temperatures is accompanied by a corresponding fluctuation in rainfall, possessing the highest volume during the humid season. It maximizes at 244mm (9.61") in
September and drastically dips to 20mm (0.79") by
January.
Relatively high humidity ties in consistency with the overall warm and moist environment throughout the year, revealing least in
November at 80% and reaching up to 88% in
February. Another noteworthy finding involves the ample hours of daylight primarily during the middle months, with 13.3 hours in
June, gradually reducing to an average of 10.9 hours in the shortest daylight month of December.
The best time to visit Haikou
Ranking the best time to visit
Haikou involves a recipe of pleasant temperatures, manageable humidity, and adequate hours of sunlight. These conditions best align during the
November to
February period. During these months, the average temperatures dip down to a comfortable range of 22°C (71.6°F) to 25.1°C (77.2°F). The relative humidity hovers between 80% and 88%, which composes a relatively drier environment than the rain-heavy summertime. Simultaneously, moderate rainfall between 20mm (0.79") and 81mm (3.19") paired with more than 11 hours of daylight and moderate UV index readings promote outdoor adventures and sightseeing.
The worst time to visit Haikou
Swiftly arriving at the other end of the spectrum, the worst time to visit
Haikou primarily rests during the monsoon period of
May to
September. This timeframe marks the climax of temperatures ranging from 30.7°C (87.3°F) to 33.1°C (91.6°F), coinciding with peak rainfall amounts between 181mm (7.13") and 244mm (9.61") in the months of May to September. The high volume of precipitation combined with the potentially oppressive heat and humidity can make sightseeing and general tourism activities rather uncomfortable.
Spring weather in Haikou
Spring sees a transitional phase starting from
March to
May in
Haikou. The weather gradually warms up with the average high temperatures scaling from 22.3°C (72.1°F) in March to 31.9°C (89.4°F) by May. The low temperatures also follow suit but at a steadier pace from 16.4°C (61.5°F) in March to 24.5°C (76.1°F) in May. Rainfall begins to pick up, starting from a reasonably dry 35mm (1.38") in March to a heavy 181mm (7.13") by the end of May. Triggered by the rising temperatures, relative humidity remains quite high, fluctuating between 86% and 84%.
Summer weather in Haikou
The summers in
Haikou extend from
June to
August, labeled with intense heat and a surge in rain activity. The average high temperatures revolve around the 32°C (89.6°F) mark, while the lows stay around a sultry 25°C (77°F). An immense increase in precipitation is noted, culminating at 236mm (9.29") in August. The humidity marginally declines between 83% to 82%. Despite the heavy rain, abundant daylight of more than 13 hours and increased sunshine hours allow a fair amount of outdoor recreational activities.
Autumn weather in Haikou
The transition from hot to cooler conditions defines the autumn months of
September to
November in
Haikou. Average high temperatures drop from 30.7°C (87.3°F) in September to 25.1°C (77.2°F) in November. Similarly, the nighttime temperatures decrease from 24.6°C (76.3°F) to a cooler 19.9°C (67.8°F). While September continues to face heavy rains with 244mm (9.61") precipitation, by November, the rainfall reduces to a more manageable 81mm (3.19"). The declining temperature also causes a drop in relative humidity down to 80% by November.
Winter weather in Haikou
Winters in
Haikou span from
December to
February, characterized by relatively cooler temperature trends and a significant reduction in rainfall. The average high temperatures drop to a comfortable 22°C (71.6°F) in December and slightly rise to 22.3°C (72.1°F) by February. Night temperatures register a dip to a low of 16.7°C (62.1°F) in December and rise marginally to 16.4°C (61.5°F) in February. Rainfall reaches its minimum, with an average of 20mm (0.79") in
January before a slight increase to 35mm (1.38") in February. Despite the cool weather, the relative humidity remains high, peaking at 88% in February.
Weather in January
Starting a new calendar year, the city of
Haikou ushers in mild temperatures with
January lows dipping to 15.4°C (59.7°F) and highs reaching 21°C (69.8°F). The coldest month of the year, January sets itself apart from its neighbouring month,
February, offering slightly cooler temperatures.
Weather in January »Weather in February
February in
Haikou marks a transition to warmer weather, displaying a noticeable difference from the colder
January temperatures. A palpable rise in humidity accompanies this slight increase in temperature. Rain continues to show up frequently throughout February, setting the stage for an even wetter
March ahead.
Weather in February » Weather in March
March delivers a significant rise in temperatures and a renewal of libations from the sky. Relative humidity shows no considerable changes yet still escalates in parallel with the temperatures.
Haikou weather grows increasingly tropical during March, distinguishing itself from cooler and less wet
February.
Weather in March »
Weather in April
April showcases a substantial leap forward into summer from
March, providing the first taste of peaking temperatures around 29.7°C (85.5°F). The city's tropical climate blossoms, and rainfall becomes more frequent and heavier, surpassing the previous months' readings by a notable margin.
Weather in April » Weather in May
May reaps the benefits of
April’s increased rainfall, leveraging it to display a rich luxuriance of flora across the city. Temperatures aim for a blazing high of 31.9°C (89.4°F), showcasing true summer conditions. Humidity remains high throughout May, moving in tandem with the mounting temperatures, and the city begins its long, wet trek into summer, transitioning from the comparatively dry and mild conditions of April. May's arrival brings an average high-temperature of a hot 31.9°C (89.4°F), demonstrating subtle variation from the preceding month.
Weather in May » Weather in June
June offers the first spectacle of summer's apex, with temperatures peaking close to 32.9°C (91.2°F). It distinguishes itself from
May by offering slightly warmer peaks. While rainfall continues to shower down consistently, the increased hours of daylight allow for more sun-soaked outdoor activities.
Weather in June »
Weather in July
Hit by the summer's zenith, temperatures in
July peak at a scorching 33.1°C (91.6°F), marking the hottest month of the year in
Haikou. The humid, mist-laden air moves heavily through the city, a stark contrast to the relatively cooler conditions of
June.
Weather in July »Weather in August
August weather mirrors that of
July, but with a marginal decrease in temperature, reversing the ascent begun in
June. Rainfall peaks in August, resulting in increased humidity and occasionally cloudy days. The powerful sun and rainfall act together to ensure that
Haikou's tropical landscapes remain awash in hues of green and yellow.
Weather in August » Weather in September
The advent of
September brings a slight decrease in temperature from the intensity of
August's heat, hinting at the approaching season's transition. Despite the cooling trend, the weather in
Haikou remains humid and wet, with rainfall maintaining its abundant downpours.
Weather in September »
Weather in October
October acknowledges the retreat of summer and the arrival of the more temperate Fall season. The temperatures drop more noticeably from the
September highs, and rainfall starts to recede. Outdoor enthusiasts can begin to enjoy the changing scenery as the city transitions towards a milder and less humid climate, celebrating the coming end of the year. The arrival of October in
Haikou sees a recorded average high-temperature of a warm 28.4°C (83.1°F), showing little divergence from the previous month's conditions.
Weather in October » Weather in November
November in
Haikou further embraces the Fall season, with temperatures and rainfall continuing their downward trend from
October's readings. The city experiences fewer days of rainfall, and the relative humidity decreases. November offers an inviting blend of cooler temperatures and fewer rainy spells after the long, hot summer. The start of November comes with a small reduction in the average high-temperature, subtly receding from a warm 28.4°C (83.1°F) in October to a still moderately hot 25.1°C (77.2°F).
Weather in November » Weather in December
Wrapping up the year,
December shifts entirely into milder temperatures, hinting at
January’s colder conditions. Rainfall levels drop significantly from
November, ushering in one of the driest months. Despite the lessened rainfall, the relative humidity marginally increases, providing a pleasant and comfortable weather experience.
Weather in December »