Yokohama in December: weather, what to wear and what's on

Averages for 1991–2020 at the JMA's Yokohama station (39 m above sea level).

High

12.5°C (54°F)

Low

5.2°C (41°F)

Precipitation

66.4 mm

Wet days

5.5 days

Sunshine

178 hours

• Highs fall 4.6°C from November and drop another 2.3°C into January.
• That is 7.7°C below Yokohama's yearly average high of 20.2°C.
• Of our 34 places with temperature records, Yokohama is the 9th warmest in December: 0.1°C cooler than Fukuoka and 0.2°C warmer than Osaka.
• December is Yokohama's 3rd driest month (66.4 mm).
• Of our 35 places, Yokohama has the 18th highest precipitation in December: 0.2 mm less than Ise and 5.2 mm more than Kumamoto.
• Rain of 1 mm or more falls on 5.5 days, and 10 mm or more on 2.1 days.
• Snow or sleet falls on 2.3 days.
• The sun is out for 40% or more of the possible hours on 21.9 days, and 3.3 days have under 0.1 hours of sunshine.
• On 15 December 2026 the sun rises at 6:43 and sets at 16:30 in Yokohama, giving 9 hours 47 minutes of daylight (NAOJ).

Average temperature

8.7°C (48°F)

Humidity

57%

Early, mid and late December

By the last ten days of December the average high in Yokohama is 2.2°C lower than in the first ten.

By ten-day totals, 1–10 December is the wettest (29.2 mm) and 11–20 December the driest (16.8 mm).

Is Yokohama cold in December?

Yes, it is chilly. Yokohama averages 12.5°C (54°F) by day and 5.2°C (41°F) at night in December. It gets colder still: 11–20 January has highs of 9.9°C.

Chilly: highs around 12.5°C

• A warm jacket or light coat over a sweater.
• A folding umbrella: rain falls on 5.5 days.

Pack

• Folding umbrella

• Our clothing rules

Autumn leaves (maple)

The JMA's sample maple in Yokohama turns red around 14 December and has lost most of its leaves by 27 December in an average year (1991–2020). In 2025: 15 December.

Ginkgo turns yellow

The JMA's sample ginkgo in Yokohama turns yellow around 30 November and has lost most of its leaves by 12 December in an average year (1991–2020). In 2025: 28 November.

Dates are for one sample tree at or near the JMA observatory, not for every park in the city.

There are no national holidays in December 2026.

In December 2025, hotels and inns across Kanagawa Prefecture were 68.1% full on average (5th busiest of 12 months). Foreign guests spent 436,200 nights there that month (Japan Tourism Agency). That compares with 72.1% in November and 57.7% in January.

• Japan in December: visitor numbers and busy travel days
• Holidays in December
• Year-end and New Year holidays