Okayama Weather in December
December in Okayama brings moderate temperatures, with daytime highs of 13°C (55°F) and nights around 5°C (41°F). Expect around 55 mm (2.2 in) of rainfall during the month.
Rainfall in Okayama in December
Historically, December sees about 16 days of rain, with a monthly average of 55 mm (2.2 in). With rain spread across many days but low totals, showers are typically short and light rather than heavy.
Temperature in Okayama in December
In December, expect moderate temperatures in Okayama, with highs of 13°C (55°F) and lows of 5°C (41°F) at night. December is typically considered a winter month. Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights fall to 5°C (41°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Okayama in December
The city usually sees around 156 hours of sunlight, indicating a moderately sunny period.Our weather planner can help you find worldwide destinations with pleasant weather during this period. April, May, September, October and November typically offer the best weather for Okayama.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Japan, check out our Okayama's climate page.
Okayama Temperature in December
Min Temperature
5°C (41°F)
Max Temperature
13°C (55°F)
Chance of Rain
53%
Precipitation
55 mm (2.2 in)
Rainy days
16 days
Humidity
71%
Sunshine
156 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Okayama typically drop from around 13°C (55°F) at the start of December to approximately 10°C (50°F) by the end. Nights are cold, with lows typically ranging from 1°C (34°F) to 5°C (41°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Okayama in December
Browse day-by-day weather records for Okayama spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Okayama historical weather extremes in December
Based on 49 years of weather observations in Okayama between 1976 and 2025, these are the recorded extremes.
- On December 4, 2018, temperatures climbed to 20°C (68°F), marking the warmest December day on record.
- Okayama experienced its chilliest December day on December 22, 2005, reaching only 1°C (34°F).
- Okayama registered its coldest December night on December 18, 2005, with temperatures dropping to -4°C (25°F).
Best Places in Japan in December
Find out more about the weather in Japan and which places have the best travel conditions in this month. See all of Japan in December →
perfect weather
pleasant
tolerable
unpleasant
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What to Wear in Okayama in December
The weather can be unpredictable in December, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. Rain is likely on several days, so bring a good rain jacket. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Okayama in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Japan, check out our Okayama's climate page.
Temperature Rainfall Sunshine Humidity
See the full Okayama climate overview or explore weather in Japan.
