Yamanouchi Weather in December
Yamanouchi in December sees low daytime temperatures of 5°C (41°F) and nighttime lows of -4°C (25°F). Rainfall is fairly high this month at around 129 mm (5.1 in), so pack a rain jacket to stay dry.
Rainfall in Yamanouchi in December
Expect around 21 days of snow/rain based on historical data, with 129 mm (5.1 in) average. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.
Temperature in Yamanouchi in December
Daytime temperatures in Yamanouchi reach 5°C (41°F) in December, dropping to -4°C (25°F) at night. December is a notable month of the winter season. Staying warm is the main priority this month, especially during mornings and evenings. Nights are well below freezing at -4°C (25°F). An extra blanket is a good idea if you feel the cold, especially in older or less well-heated accommodation. The month is chilly, so ensure you're equipped and dress warmly. Preparation becomes key in these temperatures.
Sunshine in Yamanouchi in December
The city usually sees around 137 hours of sunlight, indicating a moderately sunny period.December in Yamanouchi can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
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 Yamanouchi's climate page.
Yamanouchi Temperature in December
Min Temperature
-4°C (25°F)
Max Temperature
5°C (41°F)
Chance of Rain
70%
Precipitation
129 mm (5.1 in)
Rainy days
21 days
Humidity
77% *
Sunshine
137 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Yamanouchi typically drop from around 10°C (50°F) at the start of December to approximately 5°C (41°F) by the end. Nights are very cold, with lows typically ranging from -3°C (27°F) to 2°C (36°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 Yamanouchi in December
Browse day-by-day weather records for Yamanouchi spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Yamanouchi historical weather extremes in December
Based on 49 years of weather observations in Yamanouchi between 1976 and 2025, these are the recorded extremes.
- The hottest December day on record in Yamanouchi reached 20°C (68°F) (December 4, 2018).
- Yamanouchi experienced its chilliest December day on December 18, 2005, reaching only -3°C (27°F).
- The lowest overnight temperature recorded in December was -12°C (10°F) (December 26, 2025).
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
poor
What to Wear in Yamanouchi in December
We recommend to layer up for chilly conditions in Yamanouchi in December. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Yamanouchi 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 Yamanouchi's climate page.
Temperature Rainfall Sunshine Humidity
See the full Yamanouchi climate overview or explore weather in Japan.
