Last updated: August 22, 2025
In Hai'an, China, the average temperature in December hovers around 6°C (43°F), offering a crisp climate perfect for layering up. Expect minimums to dip to -8°C (17°F) and enjoy occasional warmth with maximums reaching 20°C (68°F). During this month, precipitation averages about 40 mm (1.6 in) over 7 days, contributing to an average humidity of 73%. Ideal for cozy indoor activities, this time of year invites you to explore the charm of winter!
In December in Hai'an, the average temperature is 6°C (43°F). The maximum can reach 20°C (68°F), while the minimum can drop as low as -8°C (17°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.
In Hai'an in December, the precipitation amount is 40 mm (1.6 in) over a span of 7 days.
In Hai'an in December humidity is 73%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill enveloping you, making outdoor exploration damp and uncomfortable, while layer upon layer of clothing is necessary to stay warm and dry.
In Hai'an in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Hai'an for better planning.
UV Risk Categories
Weather in Hai'an varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Hai'an, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (39°F) | 43 mm (1.7 inches) | 67% | moderate |
| February Weather | 5°C (42°F) | 44 mm (1.7 inches) | 69% | high |
| March Weather | 11°C (51°F) | 51 mm (2.0 inches) | 79% | very high |
| April Weather | 15°C (60°F) | 64 mm (2.5 inches) | 86% | very high |
| May Weather | 21°C (70°F) | 122 mm (4.8 inches) | 87% | very high |
| June Weather | 25°C (77°F) | 137 mm (5.4 inches) | 90% | very high |
| July Weather | 28°C (82°F) | 251 mm (9.9 inches) | 95% | extreme |
| August Weather | 28°C (83°F) | 177 mm (7.0 inches) | 92% | extreme |
| September Weather | 24°C (76°F) | 112 mm (4.4 inches) | 79% | very high |
| October Weather | 18°C (64°F) | 54 mm (2.1 inches) | 76% | very high |
| November Weather | 13°C (55°F) | 45 mm (1.8 inches) | 77% | moderate |
| December Weather | 6°C (43°F) | 40 mm (1.6 inches) | 73% | moderate |