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Contents
- The climate of Haikou
- The best time to visit Haikou
- The worst time to visit Haikou
- Spring weather in Haikou
- Summer weather in Haikou
- Autumn weather in Haikou
- Winter weather in Haikou
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average humidity
- Average rainfall
- Average rainfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average UV index
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.
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 »
[Resources]Frequently asked questions
What is the coldest month in Haikou?
Temperature records in Haikou, China, mark January as the coldest month, with highs averaging 21°C (69.8°F) and lows at 15.4°C (59.7°F).
What is the driest month in Haikou?
The month with the least rainfall in Haikou, China, is January, when the rain falls for 8.4 days and typically collects 20mm (0.79") of precipitation.
How many days does it rain in Haikou?
In Haikou, China, during the entire year, the rain falls for 145 days and collects up to 1652mm (65.04") of precipitation.
What is the month with the least sunshine in Haikou?
January and February, with an average of 3.5h of sunshine, are months with the least sunshine in Haikou.
What is the most humid month in Haikou?
With an average relative humidity of 88%, February is the most humid month.
When is the sea coldest in Haikou?
The month with the coldest seawater is February, with an average sea temperature of 19.6°C (67.3°F).
What are the months with the highest UV index in Haikou?
The months with the highest UV index in Haikou are March through September, with an average maximum UV index of 12.
When are the longest days in Haikou?
With an average of 13h and 18min of daylight, June has the longest days of the year in Haikou.
What is the hottest time of year in Haikou?
In Haikou, China, the peak average temperatures are observed in July, with a high of 33.1°C (91.6°F) and a low of 25.5°C (77.9°F).
What is the month with the warmest sea water in Haikou?
The month with the warmest seawater in Haikou, China, is July, with an average sea temperature of 29.5°C (85.1°F).
What month has the most sunshine in Haikou?
The month with the most sunshine in Haikou, China, is July, with an average of 8.1h of sunshine.
What is the rainiest month in Haikou?
September is the month with the most rainfall. Rain falls for 14.3 days and accumulates 244mm (9.61") of precipitation.
What is the least humid month in Haikou?
The least humid month in Haikou, China, is November, with an average relative humidity of 80%.
What is the month with the shortest days in Haikou?
The month with the shortest days is December, with an average of 10h and 54min of daylight.
Is there Daylight Saving Time (DST) in Haikou?
Haikou, China, does not utilize Daylight Saving Time (DST). CST timezone is used throughout the entire year.
When is the lowest UV index in Haikou?
The month with the lowest UV index in Haikou, China, is December, with an average maximum UV index of 7.
Average temperature
Haikou, China
The warmest month (with the highest average high temperature) is July (33.1°C).
The month with the lowest average high temperature is January (21°C).
The months with the highest average low temperature are June and July (25.5°C).
The coldest month (with the lowest average low temperature) is January (15.4°C).
Average humidity
Haikou, China
The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is November (80%).
Average rainfall
Haikou, China
- Average rainfall in January:
19.5mm - Average rainfall in February:
35mm - Average rainfall in March:
50.6mm - Average rainfall in April:
100.2mm - Average rainfall in May:
181.4mm - Average rainfall in June:
227mm
- Average rainfall in July:
218.1mm - Average rainfall in August:
235.6mm - Average rainfall in September:
244.1mm - Average rainfall in October:
224.4mm - Average rainfall in November:
81.3mm - Average rainfall in December:
34.9mm
The wettest month (with the highest rainfall) is September (244.1mm).
The driest month (with the least rainfall) is January (19.5mm).
Average rainfall days
Haikou, China
- Average rainfall days in January:
8.4 days - Average rainfall days in February:
10.6 days - Average rainfall days in March:
10.1 days - Average rainfall days in April:
11.5 days - Average rainfall days in May:
16.5 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
15 days - Average rainfall days in August:
14.9 days - Average rainfall days in September:
14.3 days - Average rainfall days in October:
12.5 days - Average rainfall days in November:
7.9 days - Average rainfall days in December:
7.3 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is December (7.3 days).
Average sea temperature
Haikou, China
The best month for swimming (with the highest average sea temperature) is July (29.5°C).
The coldest month (with the lowest average sea temperature) is February (19.6°C).
Average daylight / Average sunshine
Haikou, China
- Average daylight in January:
11h and 1min - Average daylight in February:
11h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 4min - Average daylight in May:
13h and 1min - Average daylight in June:
13h and 2min
- Average daylight in July:
13h and 1min - Average daylight in August:
12h and 5min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 4min - Average daylight in November:
11h and 1min - Average daylight in December:
10h and 5min
The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 10h and 54min).
- Average sunshine in January:
3h and 3min - Average sunshine in February:
3h and 3min - Average sunshine in March:
4h and 2min - Average sunshine in April:
5h and 4min - Average sunshine in May:
7h and 0min - Average sunshine in June:
7h and 2min
- Average sunshine in July:
8h and 1min - Average sunshine in August:
7h and 0min - Average sunshine in September:
6h and 3min - Average sunshine in October:
5h and 4min - Average sunshine in November:
4h and 5min - Average sunshine in December:
4h and 1min
The month with the most sunshine is July (Average sunshine: 8h and 6min).
The months with the least sunshine are January and February (Average sunshine: 3h and 30min).
Average UV index
Haikou, China
The months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 7).
Haikou, China
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