Last updated: August 21, 2025
December in Okayama, Japan offers a cool and crisp atmosphere, with temperatures ranging from a maximum of 20°C (69°F) to a minimum of -2°C (29°F). The average temperature settles at around 8°C (46°F), making it a time for cozy layers. With 45 mm (1.8 in) of precipitation over approximately 6 days, the month brings a refreshing touch, accompanied by a relatively high humidity level of 82%. Visitors can enjoy the tranquil winter scenery while navigating the mild and occasionally wet weather, perfect for experiencing Okayama's serene charm during this season.
In December, Okayama, Japan begins to embrace the chill of winter, with temperatures typically ranging from a minimum of -2°C (29°F) to a maximum of 20°C (69°F). As the month progresses, the average temperature hovers around 8°C (46°F), marking a notable drop from the milder conditions of previous months. This month serves as a transition, where the lingering warmth of autumn gives way to the crispness of winter, evident in the temperatures that reflect a steady decline from the 13°C (55°F) average in November. Overall, December's climate invites cozy attire and warm drinks, while also hinting at the festive spirit that often accompanies the season in this picturesque region of Japan.
In December, Okayama, Japan, experiences a shift in precipitation patterns, with an average rainfall of 45 mm (1.8 in) over approximately 6 days. This amount marks a significant decrease from the preceding months, particularly the intense rainfall seen in July and September, where totals soared above 200 mm. As temperatures begin to drop, the milder rainfall reflects a transition into winter, contrasted sharply by the deluge of the summer months. With its cooler atmosphere and occasional showers, December offers a more serene climate as the region prepares for the colder days ahead, making way for a tranquil yet damp end to the year.
In Okayama, Japan, December marks the end of the year with a humidity level of 82%, a slight dip from the preceding month's 84%. This month reflects a notable trend as humidity generally fluctuates throughout the year, peaking in the sweltering summer months of July and August at 92%. As the seasons transition, the humidity tends to decrease, particularly noticeable in the cooler months of March and April, where it briefly touches the lower 70s. December's humidity maintains a higher balance, adhering to the average winter levels, and sets the stage for a moist yet cooling atmosphere leading into the New Year.
In Okayama, Japan, December sees a UV Index of 4, classified as moderate, which means that while the sun can still be enjoyable, it's wise to take precautions as prolonged exposure can lead to sunburn—approximately 30 minutes of unprotected sun exposure should be sufficient to start feeling the effects. The trends throughout the year highlight a significant spike in UV levels during the warmer months, peaking at 12 in July and August, emphasizing a stark contrast to the milder indices found in December and January. As winter approaches, this dip in UV levels allows residents and visitors to enjoy the outdoors with less urgency for sun protection. For more details on UV fluctuations throughout the year, visit Okayama UV Index.
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As the year draws to a close, December in Okayama, Japan, enjoys a respectable 210 hours of sunshine, although it marks a decline compared to the vibrant rays of summer. The trend from August's peak of 302 hours clearly illustrates the transition from the sun-drenched warmth of mid-summer to the cooler, shorter days of winter. Despite this reduction, December’s sunshine still shines brighter than the earlier winter months, such as January and February, which start the year with only 175 and 225 hours respectively. This gradual increase throughout the spring into the lush days of May and early summer underscores Okayama's joy in basking in plentiful sunshine, showcasing the region's delightful seasonal rhythm. As festive decorations twinkle under December's softer sunlight, residents can still embrace the beauty of their surroundings, heralding the New Year with a promise of brighter days ahead.
In Okayama, Japan, the likelihood of sunny weather in December stands at a promising 61%, making it one of the brighter months of the year. This figure marks a noticeable increase from the preceding months, especially as the city transitions from the slightly gloomier late autumn period, where the chance of sun hovers around 56% in both October and November. As winter approaches, December emerges as a delightful contrast to the summer months, which typically see a lower incidence of sunshine, with July and June both languishing at 26%. This upward trend not only brightens the holiday season but also invites outdoor festivities, making December an enjoyable time to experience Okayama's charm under the sun.
As the year draws to a close, December in Okayama, Japan offers a striking contrast to the sun-soaked months of summer. With only 9 hours of daylight, the days become noticeably shorter, marking the transition into winter. This gradual decrease in daylight can be observed throughout the fall, beginning with 11 hours in October and tapering down to December. In stark contrast, the summer months of June and July bask in 14 hours of sunshine, allowing for vibrant outdoor activities. Spring and early fall see a balanced daylight duration of around 12 to 13 hours, creating a perfect environment for enjoying nature's beauty. As the cycles of seasons dance through light and shadow, Okayama experiences a rhythmic ebb and flow, reminding us of the beauty in each phase of the year.
As December arrives in Okayama, Japan, the wind begins to stir with a notable average speed of 3.3 m/s (7 mph). This marks a refreshing shift from the calmer breezes of the summer months, where the winds lingered around 2.2 to 2.5 m/s. Interestingly, December's winds pick up slightly from November's 2.7 m/s, hinting at a transition into winter that invites both briskness and clarity to the atmosphere. Throughout the year, wind speeds have varied, generally tapering during the hotter months, before gaining a bit of momentum as the year closes. December's invigorating gusts not only remind locals of the changing seasons but also beautifully encapsulate the arrival of winter's crisp embrace in Okayama's serene landscape.
Weather in Okayama varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Okayama, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of December and January, December tends to be slightly warmer, with average temperatures around 8°C (46°F) and maximums reaching up to 20°C (69°F). In contrast, January is cooler, with averages dropping to 6°C (42°F) and maximum temperatures around 16°C (62°F). Additionally, December experiences more precipitation, totaling 45 mm (1.8 in) over 6 days, while January sees less rain, with 33 mm (1.3 in) over just 3 days. Both months maintain a humidity level of 82%, contributing to a damp atmosphere, but January's overall cooler temperatures and reduced rainfall create a distinct shift from December's milder conditions. For more specific details, you can check Okayama weather in January.
In December, the weather features a mild average temperature of 8°C (46°F), with daytime highs reaching up to 20°C (69°F) and nighttime lows dropping to around -2°C (29°F). The month experiences around 45 mm (1.8 in) of precipitation over six days, accompanied by high humidity levels at 82%.
In contrast, February sees a slight decrease in average temperature to 6°C (43°F), with minimum temperatures dropping further to -5°C (23°F) while still achieving daytime highs of 21°C (70°F). Precipitation increases slightly to 47 mm (1.9 in) but occurs over fewer days, totaling just five. Humidity also decreases to 79%, making February feel a bit drier than December. For more detailed information about February weather, check out Okayama weather in February.
In December, temperatures in Okayama range from a chilly minimum of -2°C (29°F) to a pleasant maximum of 20°C (69°F), with an average temperature of 8°C (46°F). The month sees about 45 mm (1.8 in) of precipitation over roughly 6 days, accompanied by relatively high humidity at 82%. In contrast, March experiences slightly warmer conditions with minimums still at -2°C (29°F), but average and maximum temperatures rising to 10°C (51°F) and 24°C (75°F), respectively. Additionally, March has increased rainfall totaling 94 mm (3.7 in) over approximately 9 days, although humidity drops to 73%. For more details on March weather in Okayama, you can visit Okayama weather in March.
December and April present distinctly different weather patterns. In December, temperatures range from a chilly minimum of -2°C (29°F) to a mild maximum of 20°C (69°F), with an average temperature of around 8°C (46°F). The month sees about 45 mm (1.8 in) of precipitation spread over approximately 6 days, accompanied by relatively high humidity at 82%. In contrast, April experiences warmer temperatures, with a minimum of 1°C (34°F) and a maximum of 26°C (79°F), averaging 15°C (59°F). This month also brings considerably more rainfall, totaling 119 mm (4.7 in) over 8 days, but lower humidity at 74%. For insights into April weather specifics, visit Okayama weather in April.
When comparing December and May weather, it’s clear that both months present distinct climates. December typically features much cooler temperatures, with an average high of only 20°C (68°F) and lows reaching down to -2°C (29°F), while May enjoys warmer temperatures, with averages peaking at 32°C (89°F) and lows around 7°C (45°F). Additionally, May sees significantly higher precipitation at 114 mm (4.5 in) over 9 days, compared to December’s 45 mm (1.8 in) over just 6 days. Humidity levels are slightly higher in May at 84%, compared to 82% in December. For more detailed insights into the weather specifics for May, you can visit Okayama weather in May.
December and June present vastly different weather conditions. In December, temperatures range from a chilly -2°C (29°F) at night to a mild 20°C (69°F) during the day, with an average of 8°C (46°F). The month experiences less rainfall, totaling 45 mm (1.8 in) over approximately 6 rainy days, accompanied by a humidity level of 82%. In contrast, June boasts significantly warmer temperatures, with nighttime lows of 12°C (54°F) and daytime highs reaching 33°C (91°F), averaging around 23°C (74°F). This month also sees increased precipitation, with 153 mm (6.0 in) occurring over 12 days and humidity rising to 86%. For more detailed information on the weather, you can visit Okayama weather in June.
December and July in Okayama showcase a stark contrast in weather conditions. December typically sees cooler temperatures, with a minimum of -2°C (29°F) and an average of 8°C (46°F), peaking at 20°C (69°F). The month experiences relatively low precipitation, averaging 45 mm (1.8 in) over about 6 days, with humidity levels around 82%. In contrast, July is much warmer, with temperatures ranging from a minimum of 20°C (68°F) to a scorching maximum of 37°C (99°F) and an average of 27°C (81°F). This summer month is also quite wet, receiving 291 mm (11.5 in) of rain over 17 days, accompanied by higher humidity at 92%. For a detailed look at July weather, visit Okayama weather in July.
In December, the weather is significantly cooler, with temperatures ranging from a minimum of -2°C (29°F) to a maximum of 20°C (69°F), averaging around 8°C (46°F). This month sees moderate precipitation of 45 mm (1.8 in) over about six days and a humidity level of 82%. Conversely, August experiences much warmer conditions, with temperatures ranging from a minimum of 18°C (65°F) to a scorching maximum of 37°C (99°F) and an average of 29°C (85°F). Rainfall is higher during this month, totaling 171 mm (6.7 in) over approximately 11 days, accompanied by a humidity level of 92%. For more detailed information, you can check Okayama weather in August.
In December, the weather tends to be much colder and drier compared to September. With temperatures ranging from a minimum of -2°C (29°F) to a maximum of 20°C (69°F) and an average of 8°C (46°F), December experiences a significant drop in warmth. The month sees approximately 45 mm (1.8 in) of precipitation over about 6 days and has a humidity level of 82%. In contrast, September is much warmer, boasting temperatures from a minimum of 12°C (54°F) to a sweltering maximum of 36°C (97°F) with an average of 25°C (77°F). This month is also much wetter, with 203 mm (8.0 in) of rainfall spread over 12 days and a humidity level of 87%. For more specific details on September weather patterns, you can refer to Okayama weather in September.
December weather is noticeably cooler than October, with average temperatures ranging from a minimum of -2°C (29°F) to a maximum of 20°C (69°F), compared to October's milder temperatures of 7°C (45°F) to 32°C (90°F). Additionally, December experiences significantly less precipitation, with only 45 mm (1.8 in) over 6 days, whereas October sees much heavier rainfall of 169 mm (6.7 in) across 11 days. This results in a dryer month for December, despite a slightly lower humidity level of 82% compared to October's 85%. For a more detailed look at October weather, you can visit Okayama weather in October.
December weather in Okayama is characterized by a notable drop in temperature compared to November, with minimums reaching as low as -2°C (29°F) and average temperatures falling to 8°C (46°F). In contrast, November enjoys milder conditions, with averages around 13°C (55°F) and maximum temperatures peaking at 25°C (77°F). Additionally, December experiences slightly higher precipitation, totaling 45 mm (1.8 in) over six days, compared to November's 30 mm (1.2 in) across three days. Humidity levels remain relatively similar, with December at 82% and November at 84%. For more insights on weather patterns, you can check Okayama weather in November.
As December unfolds in Okayama, the weather showcases a notable transition from the warmer months. With average temperatures dropping to a cool 8°C, this month often brings a refreshing chill, especially as nighttime lows can plummet near freezing. While precipitation is moderate, occurring on about six days, the overall atmospheric humidity remains high, creating a crisp, invigorating feel. Unlike the more balmy temperatures of earlier months, December demands warmer clothing and a readiness for the distinct coolness that settles in, making it a unique time to experience Okayama's winter charm. Discover more about the seasonal changes at Okayama Climate.