December Weather in Hongkou, China

Last updated: August 21, 2025

December in Hongkou, China offers a crisp winter atmosphere characterized by average temperatures around 8°C (47°F), with peaks reaching a mild 20°C (69°F) and occasional dips to a chilly -5°C (22°F). This month is also marked by about 50 mm (2.0 in) of precipitation spread across 8 rainy days, contributing to a relatively high humidity level of 77%. As the year wraps up, this blend of cool air and moisture creates a refreshing yet brisk environment, perfect for cozying up indoors or enjoying festive outdoor activities.

December Temperature in Hongkou

As December settles over Hongkou, China, temperatures begin to dip, ushering in the winter chill. With minimums dropping to -5°C (22°F) and an average temperature of 8°C (47°F), the month marks a notable shift from the mildness of autumn. While the maximum temperature of 20°C (69°F) still hints at the warmth of previous months, the overall trend showcases a transition into a colder climate. This fluctuation creates a unique contrast, offering residents a taste of winter while still holding onto remnants of the pleasant fall weather. Such seasonal changes invite both cozy indoor activities and the beauty of the city's winter landscape.

December Weather in Hongkou: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Hongkou, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hongkou, December typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec434553617076838578685947
Data source: Temperature data for Hongkou generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Hongkou

In December, Hongkou experiences a decline in precipitation, with an average of 50 mm (2.0 in) falling over approximately 8 days. This decrease continues the trend from previous months, particularly notable after the wetter summer, where rainfall peaked in July with 250 mm (9.8 in). As the year wraps up, December offers a quieter weather pattern, reflecting a shift towards drier conditions that began earlier in the autumn. The cumulative effect of reduced rainfall this month, mirroring November's relatively low 51 mm (2.0 in), hints at a gradual transition to winter's more stable climate. This trend underscores the region's evolving weather patterns as it approaches the colder months.

December Precipitation Trends in Hongkou

The chart displays monthly precipitation patterns in Hongkou, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Hongkou, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec55608372117201250167177695150
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Hongkou

In December, Hongkou, China experiences a humidity level of 77%, marking a subtle decline from the summer peak months of July and August, where humidity reaches a sweltering 93% and 91%, respectively. As the year progresses, humidity begins to consistently rise from January's 70%, reaching its zenith in the warm summer months, but the transition into winter brings a respite. Although December's figure is lower than the highs of late spring and summer, it still reflects the area's characteristically high moisture levels. The gradual dip from autumn's 82% in November signals a shift towards a more comfortable and cooler end of the year, inviting a range of activities suited to the brisk yet humid winter atmosphere.

December Average Humidity in Hongkou

This chart illustrates the average monthly humidity levels in Hongkou, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Hongkou is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec70%73%81%87%87%89%93%91%81%80%82%77%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Hongkou

In December, Hongkou, China, experiences a moderate UV Index of 4, allowing for a burn time of 30 minutes—a welcome respite from the intense exposure felt in the peak summer months. The trend through the year reveals a dramatic increase in UV radiation, peaking in mid-summer with extreme levels of 11-12, where skin can burn within just 10 minutes. As the seasons transition, UV exposure begins at a moderate level in January and gradually rises, reaching very high categories of 8-10 from March to October. With the winter chill settling in and UV levels decreasing, December serves as a reminder for residents to remain mindful of sun protection even during the cooler months. For more details on UV levels throughout the year, visit Hongkou UV Index.

Maximum UV Index Levels in Hongkou for December

The chart shows the monthly maximum UV Index (UVI) for Hongkou in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Hongkou typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec568101011121111864
Data source: Hongkou December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

December Sunshine in Hongkou

As December wraps up the year in Hongkou, sunlight begins to wane slightly, with the month receiving 214 hours of glorious sunshine. This marks a gentle decline from the vibrant 318 hours of sunshine in August, signaling the transition from the peak summer months to the cooler winter season. Interestingly, December's sunshine hours remain relatively high when compared to the earlier months, showcasing a gradual decrease that follows a sunny pattern from January's modest 157 hours to November's 224 hours. The trend illustrates a warm embrace of daylight through the year, culminating in a December that still glimmers with enough sunshine to brighten the colder days, reminding residents and visitors alike of the beauty that lingers even in the depths of winter.

Monthly Sunshine Duration in Hongkou: December Highlighted

The December sunshine duration represents the total number of hours Hongkou experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec157h211h244h267h290h274h301h318h260h245h224h214h
Data source: Hongkou December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Hongkou During December

As December unfolds in Hongkou, China, the likelihood of sunny weather reaches an encouraging 64%, marking an upward trend from the earlier months. This increase is particularly notable, especially when compared to the volatile sunniness of the summer and early autumn. After experiencing a dip during the sweltering months of July and August, which see a sharp decrease in sunshine, December presents a refreshing shift. The month not only benefits from a higher chance of sunny days than November, but also surpasses any other winter month, creating a pleasant backdrop for holiday activities and outdoor enjoyment. With this promising forecast, residents and visitors can look forward to welcoming the festive season under clearer skies.

Percentage of Sunny Days in December in Hongkou

The chart illustrates the percentage of sunny days in Hongkou throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Hongkou experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec53%43%29%33%29%23%17%34%45%43%57%64%
Data source: Hongkou December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Hongkou in December

In Hongkou, China, the progression of daylight duration throughout the year depicts a clear seasonal trend. Starting with about 10 hours of daylight in January, the days gradually lengthen, reaching a peak of 14 hours in June. This summer peak is then followed by a slight decline, as daylight hours decrease to 13 hours during both July and August, before tapering off to 11 hours by October. As winter approaches, daylight shrinks again, returning to 10 hours in December. This rhythmic ebb and flow reflects the subtleties of seasonal changes, highlighting the stark contrast between the long, vibrant days of summer and the shorter, more introspective daylight hours of winter in this dynamic region.

Average Daylight Hours in Hongkou for December

The chart illustrates the variation in daylight duration in Hongkou throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 21m11h 4m11h 59m12h 55m13h 43m14h 7m13h 55m13h 13m12h 19m11h 23m10h 34m10h 9m
Data source: Hongkou daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Hongkou

As December settles over Hongkou, the average wind speed gently declines to 3.1 m/s (7 mph), marking one of the year's calmest months. This month’s winds whisper softly compared to the summer's gusts, which peak at 5.1 m/s (11 mph) in July. After a steady flow of moderate winds throughout most of the year, December's breezes evoke a sense of tranquility, a serene close to the year. The data illustrates a clear trend: as the seasons shift from the vitality of summer to the stillness of winter, the winds too soften, offering a peaceful respite in this vibrant district of Shanghai.

Average December Wind Speed in Hongkou

The chart displays monthly wind speed patterns in Hongkou, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.73.73.73.63.73.35.13.13.63.83.53.1 m/s
Data source: Hongkou December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Hongkou Compares to Other Months

Weather in Hongkou varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Hongkou, focusing on differences in temperature, rainfall, humidity, and UV levels.

December typically brings milder weather with an average temperature of 8°C (47°F), while January sees a slight drop to an average of 6°C (44°F). In December, temperatures can range from a minimum of -5°C (22°F) to a maximum of 20°C (69°F), whereas January records slightly cooler extremes, with a minimum of -8°C (19°F) and a maximum of 22°C (71°F). Both months experience similar levels of precipitation, with December averaging 50 mm and January slightly higher at 55 mm, although January has fewer rainy days, occurring over just 6 days compared to 8 in December. Humidity is also lower in January, registering at 70% compared to December’s 77%. For more detailed insights, you can check Hongkou weather in January.

In December, the weather tends to be cooler, with temperatures ranging from a minimum of -5°C (22°F) to a maximum of 20°C (69°F) and an average of 8°C (47°F). The month experiences about 50 mm (2.0 in) of precipitation over eight days, with humidity levels around 77%. In contrast, February sees slightly milder temperatures, ranging from -3°C (27°F) to a maximum of 24°C (76°F), with an average of 7°C (45°F). Precipitation increases a bit to 60 mm (2.4 in) over the same number of days, but humidity drops to 73%. For more detailed information, you can check Hongkou weather in February.

December and March exhibit notable differences in weather patterns. December tends to be colder, with temperatures ranging from a minimum of -5°C (22°F) to a maximum of 20°C (69°F), averaging around 8°C (47°F). The month also sees about 50 mm (2.0 in) of precipitation over approximately 8 days, accompanied by a humidity level of 77%. In contrast, March experiences a milder climate, with temperatures starting at a minimum of 2°C (37°F) and reaching up to 26°C (79°F), with an average temperature of 12°C (54°F). Precipitation increases to 83 mm (3.3 in) across about 12 days, and humidity rises slightly to 81%. For more specific details about the weather in March, you can visit Hongkou weather in March.

December and April present contrasting weather patterns. In December, temperatures range from a chilly minimum of -5°C (22°F) to a maximum of 20°C (69°F), averaging around 8°C (47°F). The month sees about 50 mm (2.0 in) of precipitation over roughly 8 days, coupled with a humidity level of 77%. In contrast, April experiences milder conditions with a minimum temperature of 5°C (42°F) and a maximum soaring up to 31°C (87°F), averaging 16°C (61°F). Precipitation increases slightly to 72 mm (2.8 in) over 9 days, with humidity also rising to 87%. For more details on April's weather, you can visit Hongkou weather in April.

December and May present contrasting weather conditions. In December, temperatures range from a chilly minimum of -5°C (22°F) to a mild maximum of 20°C (69°F), with an average of 8°C (47°F). This month receives about 50 mm (2.0 in) of precipitation over approximately 8 days and has a humidity level of 77%. In sharp contrast, May experiences significantly warmer temperatures, with a minimum of 12°C (53°F), an average of 21°C (71°F), and a maximum that soars to 34°C (94°F). The month is much wetter, yielding 117 mm (4.6 in) of rain over about 10 days, accompanied by a higher humidity of 87%. For more detailed information on May weather, visit Hongkou weather in May.

December and June present starkly contrasting weather conditions. In December, temperatures range from a chilly -5°C (22°F) at night to a mild average of 8°C (47°F), reaching a maximum of 20°C (69°F) on warmer days. The month sees about 50 mm (2.0 in) of precipitation over approximately 8 days, with humidity levels around 77%. In contrast, June boasts significantly higher temperatures, with lows of 18°C (65°F) and averages soaring to 25°C (76°F), peaking at a sweltering 36°C (96°F). Rainfall is more substantial in June, totaling 201 mm (7.9 in) spread across about 15 days, and the humidity is higher at 89%. For a detailed look at the June weather, visit Hongkou weather in June.

When comparing the weather between December and July, there is a stark contrast in temperature and precipitation levels. December experiences much cooler temperatures, with lows reaching -5°C (22°F) and averages around 8°C (47°F), while July boasts much warmer conditions, with minimum temperatures of 20°C (69°F) and averages soaring to 29°C (84°F). Precipitation also varies significantly; December sees around 50 mm (2.0 in) over 8 days, whereas July is much wetter, with about 250 mm (9.8 in) spread across 16 days. Additionally, humidity levels are higher in July at 93% compared to December's 77%, contributing to a much more oppressive summer climate. For a detailed view of July weather, visit Hongkou weather in July.

December and August present stark contrasts in weather. December sees a chill with temperatures ranging from a minimum of -5°C (22°F) to a maximum of 20°C (69°F), and an average of 8°C (47°F). The month experiences about 50 mm (2.0 in) of precipitation over 8 days, with a humidity level of 77%. In contrast, August is characterized by warmth and humidity, with temperatures that range from a minimum of 20°C (69°F) to a scorching maximum of 38°C (100°F), averaging 29°C (85°F). It receives significantly more rainfall, totaling 167 mm (6.6 in) over 15 days and a higher humidity of 91%. For a more detailed look at the conditions during August, you can visit Hongkou weather in August.

In comparing the weather between December and September, it’s clear there are distinct differences. December experiences much cooler temperatures, with a minimum of -5°C (22°F) and an average of 8°C (47°F), contrasting sharply with September’s warmer climate, where temperatures range from a minimum of 17°C (63°F) to an average of 25°C (78°F). Precipitation also varies significantly; December sees about 50 mm (2.0 in) over 8 days, whereas September has a much higher amount of 177 mm (7.0 in) spread across 13 days. Humidity levels are relatively similar, with December at 77% and September slightly higher at 81%. For more details on September weather, you can check out Hongkou weather in September.

December's weather contrasts sharply with that of October. While December's temperatures range from a chilly -5°C (22°F) to a mild 20°C (69°F), October enjoys warmer conditions, with temperatures ranging from a minimum of 10°C (51°F) to a pleasant maximum of 31°C (89°F). Precipitation is relatively consistent, with December experiencing about 50 mm (2.0 in) over 8 days compared to October's 69 mm (2.7 in) across 7 days. Additionally, December's humidity stands at 77%, slightly lower than October's 80%. For a more detailed look at October weather, you can check Hongkou weather in October.

In comparing the weather between November and December, we observe notable differences in temperature and humidity. December experiences cooler temperatures with a minimum of -5°C (22°F) and an average of 8°C (47°F), while November remains milder, with temperatures ranging from a minimum of 2°C (37°F) to an average of 15°C (59°F). Both months have similar precipitation levels at around 50 mm (2.0 inches), though December sees a slight increase in rainy days with 8 compared to November's 7 days. Additionally, humidity is slightly lower in December at 77%, compared to November's 82%, making December feel a bit crisper. For a more detailed look, you can visit Hongkou weather in November.

Compare Hongkou's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Hongkou

As December settles in Hongkou, the weather paints a unique picture distinct from other months. This time of year welcomes a crisp chill, with temperatures dipping to their lowest, creating a sharp contrast to the milder autumn climate. Humidity levels remain relatively high, adding a dampness to the air that can feel quite brisk. While precipitation is less frequent, the occasional rainy day can still surprise you. For those preparing to explore the vibrant streets of Hongkou, it's important to dress warmly and embrace the beauty of the city's winter ambiance. To learn more about what to expect throughout the year, check out Hongkou Climate.