Last updated: August 21, 2025
January in Hainan, China presents a unique climate characterized by cold temperatures and low precipitation. The maximum temperature hovers around a brisk -3°C (27°F), while the average temperature drops to -20°C (-4°F), with chilling minimums reaching as low as -38°C (-36°F)—a significant departure from the region's typical warmth. Despite these frigid conditions, Hainan experiences only a light precipitation of 5 mm (0.2 in) spread over a mere day, contributing to a humidity level of 75%. This month offers a fascinating glimpse into the island's winter landscape, inviting visitors to explore its distinct seasonal charm.
In January, Hainan, China experiences some of its coldest temperatures of the year, with averages hovering around -20°C (-4°F), and maximums barely peaking at -3°C (27°F). This frigid winter juxtaposes sharply with the warmer months that follow, where temperatures steadily rise. By February, the mercury begins to shift towards milder conditions, reaching an average of -15°C (5°F), and by March, temperatures can reach a balmy 17°C (63°F). As spring unfolds, April brings a significant break from the chill, with an average of 7°C (44°F), and by May, the warmth further escalates as average temperatures soar to 14°C (58°F). This trend continues into summer, with July and August showcasing highs of 34°C (93°F) and 29°C (85°F), reflecting the region's transition from stark winter to vibrant warmth. As the year closes, a gradual cooldown starts again in October, but January remains a stunning reminder of Hainan's diverse climatic shifts throughout the year.
In January, Hainan experiences remarkably low precipitation, with only 5 mm (0.2 in) spread over a solitary day of rain, marking it as one of the driest months of the year. This trend of minimal rainfall sets the tone for the early months, as February sees just a slight increase to 6 mm (also 0.2 in), maintaining the dry spell. However, as the year progresses, there is a notable shift; March experiences a jump to 13 mm (0.5 in), and from April onward, precipitation rises significantly, reflecting the transition into the wetter season. By May and June, monthly totals soar to 72 mm (2.8 in) and 126 mm (4.9 in), respectively, with days of rainfall dramatically increasing, peaking in the summer months of July and August. This highlights a distinct pattern of increasing rainfall as Hainan moves toward its wet season, making January a stark contrast to the lush, rainy months that follow.
In January, Hainan, China experiences a relatively high humidity level, averaging around 75%, which sets the tone for the months ahead. As the year progresses, humidity begins to decline, reaching its lowest in April at 59%. This trend of decreasing moisture continues into May before a noticeable shift occurs in June, where humidity surges to 79%. The summer months see the highest humidity levels, peaking in August at 87%, creating a tropical atmosphere. As fall approaches, humidity gradually decreases again, with November and December cooling down to 61% and 60%, respectively. Overall, Hainan's humidity showcases a dynamic rhythm, fluctuating with the seasons and contributing to its lush, vibrant environment.
In January, Hainan, China experiences a low UV Index of 2, allowing for a relatively safe outdoor experience with a burn time of 45 minutes. This gentle start to the year contrasts sharply with the rising UV levels in the coming months, peaking in the summer. As winter transitions to spring, February and March see moderate indices of 3 and 4 respectively, reducing burn times to 30 minutes. By April and May, UV exposure elevates to the high category, with indices of 6 and 7, prompting a shorter burn time of just 25 minutes. June and July usher in a period of intensity, as UV levels climb to a very high index of 9, demanding vigilance with only 15 minutes of safe sun exposure. This trend of high UV persists into August before tapering off in the fall. Hainan's UV Index declines significantly in the latter part of the year, returning to low levels by November and December, with burn times extending back to 45 minutes. For those planning outdoor activities in any season, understanding these trends is essential for sun safety—explore more at Hainan UV Index.
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In Hainan, China, January marks the beginning of a gradual increase in sunshine hours, offering a cozy 182 hours of sunlight that paves the way for the upcoming months. As winter transitions into spring, February sees a notable leap to 239 hours, hinting at the inviting warmth that lies ahead. The trend continues upwards, with March and April basking in 283 and 302 hours of sunshine, respectively. By May, the sunny days peak at an impressive 330 hours, embodying the essence of tropical bliss. Even as summer rolls in, Hainan maintains a robust 327 hours in June and a high of 341 hours in July before starting to taper off. After the peak, the sunshine hours begin to level out, reaching 285 hours in August and gently declining through the autumn months, finishing the year on a respectable note with 215 hours in November and 225 hours in December. This trend underscores Hainan's unique climate, where the promise of sun transforms each month into a vibrant invitation for adventurers and sun-seekers alike.
In January, Hainan, China enjoys a promising 62% chance of sunny weather, making it one of the sunniest months of the year. This favorable start sets the tone for a generally pleasant winter, especially when compared to the following month, February, which sees a decline to 51%. As spring approaches, the likelihood of sunny days fluctuates, peaking again in October at 60%, before dipping again in the summer months, where July and August experience the least sunshine, with only 27% and 33% chances, respectively. This pattern highlights January as an ideal time for sun-seekers, with its vibrant sunshine inviting visitors to bask in the beauty of Hainan before the seasonal changes bring increased cloud cover.
In January, Hainan, China experiences 8 hours of daylight, marking the beginning of the year with shorter days. As February approaches, the duration increases to 10 hours, hinting at the gradual transition toward longer days. This upward trend continues into March and April, where daylight extends to 11 and 13 hours, respectively. By May, residents can bask in 15 hours of sunlight, a peak that remains steady through June and July. However, as summer draws to a close in August, daylight begins to taper off slightly to 14 hours, shifting softly into the autumn months where September sees a decrease to 12 hours. The decline continues into October with 10 hours, further diminishing to 9 hours in November. Finally, daylight returns to its January levels by December, completing a circular journey through the seasons while reflecting Hainan's dynamic climate.
In Hainan, China, January greets visitors with a gentle average wind speed of 2.6 m/s (6 mph), setting a tranquil tone for the month. This serene breeze is the calm before the wind gradually picks up in the following months, reaching a peak of 4.0 m/s (9 mph) in April, perfect for those who enjoy a bit more vigor in their outdoor activities. As spring unfolds, the winds remain relatively robust, hovering around 3.6 m/s (8 mph) in March and tapering off to 3.0 m/s (7 mph) by June. Notably, the summer months show a slight decline in wind speed, with July and September reflecting a softer pace of 2.7 m/s (6 mph). As the year closes, the winds stabilize once more, averaging 3.1 m/s (7 mph) in November and 3.2 m/s (7 mph) in December. This trend illustrates a rhythmic cycle, with January embracing calmness before a subtle crescendo unfolds as the seasons change.
Weather in Hainan varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Hainan, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February exhibit notable differences in temperature and overall climate. January is characterized by much colder temperatures, with an average low of -20°C (-4°F) and highs reaching only -3°C (27°F). In contrast, February sees a significant rise in average temperatures, with lows of -15°C (5°F) and maximums soaring to 8°C (47°F), making it more temperate. Both months receive minimal precipitation, with January recording 5 mm (0.2 in) and February slightly higher at 6 mm (0.2 in), but both only experience about one day of rainfall. Humidity levels are somewhat higher in January at 75%, compared to 70% in February, contributing to a different feel in the air. For those interested in warmer destinations, you can also check out Hainan weather in February.
In January, the weather is characterized by frigid temperatures, with a minimum of -38°C (-36°F) and an average around -20°C (-4°F), peaking at a maximum of -3°C (27°F). Precipitation is limited, with only 5 mm (0.2 in) falling across just one day, contributing to a high humidity of 75%. In contrast, March experiences a significant shift, with warmer temperatures featuring a minimum of -31°C (-23°F) and an average of -3°C (26°F) but reaching up to 17°C (63°F). The month sees an increase in precipitation to 13 mm (0.5 in) over three days, and humidity decreases to 63%. For more details about weather conditions in March, you can visit Hainan weather in March.
January and April present starkly contrasting weather conditions. In January, temperatures plummet with an average of -20°C (-4°F) and can drop as low as -38°C (-36°F), creating a harsh winter environment. Precipitation is minimal during this month, totaling just 5 mm (0.2 in) across one day, while humidity remains relatively high at 75%.
In contrast, April ushers in a significant warming trend, with average temperatures rising to 7°C (44°F) and peaking at 25°C (78°F). This month experiences more precipitation, totaling 32 mm (1.3 in) over four days, accompanied by a decrease in humidity to 59%. For further details about weather patterns, you can check Hainan weather in April.
In January, the weather is frigid, with temperatures ranging from a chilling -38°C (-36°F) to a relatively milder max of -3°C (27°F), and an average of -20°C (-4°F). Precipitation is minimal, with only 5 mm over a single day, accompanied by high humidity levels at 75%.
In stark contrast, May brings a significant thaw, with temperatures varying from a minimum of 0°C (33°F) to a maximum of 31°C (89°F) and an average of 14°C (58°F). This month sees much more precipitation, totaling 72 mm over 11 days, alongside a decrease in humidity to 61%. The shift from January's biting cold to May's warmth is striking, emphasizing the dramatic seasonal changes. For more detailed insights, check out Hainan weather in May.
In January, the weather is characterized by bitterly cold temperatures, with averages hovering around -20°C (-4°F) and a maximum of only -3°C (27°F). Precipitation is minimal, with just 5 mm (0.2 in) over the course of a day, and humidity levels are notable at 75%. In stark contrast, June brings a significant warming trend, with temperatures ranging from a minimum of 6°C (43°F) to a scorching maximum of 36°C (97°F) and an average of 19°C (67°F). The month is also much wetter, receiving 126 mm (4.9 in) of precipitation over 15 days, while humidity rises slightly to 79%. For more insights into the weather during this vibrant summer month, you can check Hainan weather in June.
In January, the weather is harsh and frigid, with temperatures ranging from a bone-chilling -38°C (-36°F) to a slightly more bearable maximum of -3°C (27°F). Precipitation is minimal at 5 mm (0.2 in) across just one day, while the humidity sits at a relatively high 75%, creating a cold and damp environment. In contrast, July brings a dramatic shift with much warmer conditions; temperatures range from a mild 13°C (57°F) to a sweltering 34°C (93°F), with an average of 23°C (74°F). The summer month sees significantly higher precipitation at 175 mm (6.9 in) over 17 days, and humidity rises to 84%, contributing to a hot and sticky atmosphere. For a more detailed view of July weather in Hainan, you can check Hainan weather in July.
January and August present stark contrasts in weather conditions. In January, temperatures plummet to a minimum of -38°C (-36°F) with an average of -20°C (-4°F), making it a frigid month characterized by minimal precipitation of just 5 mm (0.2 in) occurring over a single day, coupled with a humidity level of 75%. In contrast, August experiences a much milder climate, with temperatures ranging from a minimum of 6°C (42°F) to a maximum of 29°C (85°F) and an average of 20°C (69°F). This month sees significant precipitation, totaling 183 mm (7.2 in) across 17 days, resulting in increased humidity levels at 87%. For further details on weather patterns, you can check Hainan weather in August.
January and September present strikingly different weather conditions. In January, temperatures plummet, with minimums reaching as low as -38°C (-36°F) and an average of -20°C (-4°F), creating a frigid environment. Precipitation is minimal, with only 5 mm (0.2 in) recorded over just one day, and humidity remains at a moderately high 75%.
In contrast, September offers a much warmer climate, with temperatures ranging from a cool minimum of 0°C (33°F) to a pleasant maximum of 28°C (83°F) and an average of 15°C (59°F). This month sees significant rainfall with 103 mm (4.1 in) over nine days, and humidity is slightly higher at 85%. The warmer temperatures and increased precipitation make September feel more vibrant compared to the stark chill of January. For more details on this month's weather in Hainan, check out Hainan weather in September.
January and October present stark contrasts in weather patterns. January is characterized by its frigid temperatures, where the minimum can plunge to -38°C (-36°F) and the average hovers around -20°C (-4°F), with only a slight chance of precipitation of 5 mm (0.2 in) occurring over just one day. Humidity is relatively high at 75%, but the frigid temperatures dominate the conditions. In contrast, October offers a much milder experience, with temperatures ranging from a minimum of -10°C (15°F) to a pleasant maximum of 27°C (80°F), reflecting an average temperature of 6°C (42°F). Additionally, October experiences more precipitation, totaling 22 mm (0.9 in) over four days, and a slightly higher humidity level of 80%. For a closer look at regional variations, you can visit Hainan weather in October.
In January, the weather is characterized by severe cold, with temperatures dipping as low as -38°C (-36°F) and an average of -20°C (-4°F). Precipitation is minimal, amounting to just 5 mm (0.2 in) over the course of the month, occurring on only one day, accompanied by a high humidity level of 75%.
In contrast, November offers a milder climate, with temperatures ranging from a minimum of -25°C (-14°F) to a maximum of 14°C (57°F) and an average of -6°C (21°F). This month sees significantly higher precipitation of 22 mm (0.9 in) spread over four days, along with lower humidity levels at 61%.
Overall, comparing January and November reveals a stark difference in temperature and precipitation, highlighting November's more temperate conditions. For more on the weather specifics in November, you can refer to Hainan weather in November.
In January, temperatures tend to be colder compared to December, with January featuring minimums of -38°C (-36°F) and an average of -20°C (-4°F), while December sees milder conditions with minimums of -32°C (-26°F) and an average of -18°C (0°F). The maximum temperatures in January struggle to reach just -3°C (27°F), whereas December can rise to a more moderate 6°C (43°F). Additionally, January experiences less precipitation with only 5 mm (0.2 in) over a single day, compared to December's 9 mm (0.3 in) across two days. Humidity also differs, being higher in January at 75% compared to December's 60%. For more insights, you can explore the Hainan weather in December.
In January, Hainan experiences a distinct chill compared to the milder months that precede and follow it. With average temperatures plummeting and a notable increase in humidity, this month stands out in stark contrast to the warmer, more temperate conditions typical of the rest of the year. The sparse precipitation adds to the dry atmosphere, making it a unique time to explore Hainan's winter landscape. For those planning a visit, embracing the cold can unveil a different side of this beautiful region. For more detailed information on weather patterns, visit Hainan Climate.