Yōkaichiba in Winter
In winter (December, January and February), Yōkaichiba sees average daytime highs around 10°C and overnight lows near 4°C, with 236 mm of precipitation over about 27 wet days across the season. It is the coldest season of the year and the driest season of the year.
Over the season highs ease from about 14°C in early December to 11°C by late February. The sky is clear or mostly clear about 51% of the time across winter, and the air most often feels dry.
Winter is Yōkaichiba's weakest season of the year to visit on our travel score. For the whole year in context, see Yōkaichiba's year-round climate.
- Avg daytime high
- 10°C
- coldest season of the year
- Avg overnight low
- 4°C
- Precipitation
- 236 mm
- 27 wet days
- Avg wind
- 14 km/h
- Travel score
- 2.6
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Yōkaichiba in Winter
Over the season highs ease from about 14°C in early December to 11°C by late February.
A typical winter day in Yōkaichiba reaches about 10°C and drops to 4°C overnight. The warmest of the three months is December, the coolest January.
How winter really feels in Yōkaichiba
Once humidity and wind are folded in, winter brings about 0 days that feel above 32°C and 33 that feel at or below 0°C.
The story in winter is cold — wind chill drags the overnight "feels like" below the raw low.
Yōkaichiba weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 9° / 3° | 82 | 8.7 | 0.7 | 9.9 | 2.1 |
| Feb | 10° / 4° | 77 | 9 | 0.8 | 10.6 | 2.3 |
| Mar | 13° / 7° | 130 | 13.1 | 0.5 | 11.7 | 3.4 |
| Apr | 17° / 11° | 112 | 12.6 | 0 | 12.9 | 5.2 |
| May | 21° / 16° | 128 | 11.7 | 0 | 13.9 | 6.1 |
| Jun | 24° / 19° | 159 | 13.2 | 0 | 14.4 | 5.9 |
| Jul | 28° / 23° | 142 | 13.3 | 0 | 14.2 | 5.4 |
| Aug | 29° / 24° | 101 | 11.1 | 0 | 13.3 | 5.1 |
| Sep | 26° / 22° | 168 | 14 | 0 | 12.2 | 5.8 |
| Oct | 21° / 17° | 209 | 13.2 | 0 | 11.1 | 6.1 |
| Nov | 17° / 11° | 109 | 10.9 | 0 | 10.1 | 5.2 |
| Dec | 12° / 6° | 77 | 9.4 | 0 | 9.6 | 3.3 |
Cloud cover in Winter
The sky is clear or mostly clear about 51% of the time across winter.
Chance of precipitation in Winter
Yōkaichiba gets around 236 mm of rain and snow over 27 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 14 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 9 h 48 min in early December to 11 h 06 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 2.8 kWh/m².
Hazard calendar for Yōkaichiba
In winter, Yōkaichiba overlaps its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Yōkaichiba sits in the Pacific typhoon belt; the season peaks July–October.
Is winter a good time to visit Yōkaichiba?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a weaker month for outdoor sightseeing in Yōkaichiba.
What to pack for Yōkaichiba in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Yōkaichiba sees daytime highs around 10°C and nights near 4°C. Pack a warm layer. Worth having: rain gear. About 27 days see rain.
Sea temperature near Yōkaichiba in Winter
The nearest coast averages about 16°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in August at about 25°C and coldest in February near 15°C.
It's comfortable for a long swim from Jun 5 to Nov 22 — about 5.6 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 16 | 15 | 15 | 16 | 19 | 21 | 23 | 25 | 25 | 23 | 21 | 18 |
| Comfort | Cool | Bracing | Cool | Cool | Cool | Refreshing | Refreshing | Warm | Warm | Refreshing | Refreshing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 16 | Cool |
| Feb | 15 | Bracing |
| Mar | 15 | Cool |
| Apr | 16 | Cool |
| May | 19 | Cool |
| Jun | 21 | Refreshing |
| Jul | 23 | Refreshing |
| Aug | 25 | Warm |
| Sep | 25 | Warm |
| Oct | 23 | Refreshing |
| Nov | 21 | Refreshing |
| Dec | 18 | Cool |
UV index in Yōkaichiba in Winter
Clear-sky midday UV across winter averages around 3. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Yōkaichiba peaks around August 12 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 4 | 4 | 7 | 8 | 9 | 10 | 10 | 8 | 6 | 3 | 2 |
| Level | Moderate | Moderate | Moderate | High | Very high | Very high | Very high | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 4 | Moderate |
| Mar | 4 | Moderate |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 10 | Extreme |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Yōkaichiba in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Yōkaichiba is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 14 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 15 | 18 | 25 | 25 | 24 | 19 | 16 | 15 | 15 | 16 | 16 | 14 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 15 | Moderate |
| Feb | 18 | Moderate |
| Mar | 25 | Moderate |
| Apr | 25 | Moderate |
| May | 24 | Moderate |
| Jun | 19 | Moderate |
| Jul | 16 | Moderate |
| Aug | 15 | Moderate |
| Sep | 15 | Moderate |
| Oct | 16 | Moderate |
| Nov | 16 | Moderate |
| Dec | 14 | Moderate |
Where is Yōkaichiba?
Yōkaichiba sits at 35.7°N, 140.6°E, 10 m above sea level, in Japan. The nearest listed city is Sōsa, 2.0 km away.
Topography around Yōkaichiba
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Yōkaichiba.
Within 3 km, the terrain around Yōkaichiba has only modest variations in elevation — a maximum elevation change of 53 m around an average of 17 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 72 m; within 80 km, large variations in elevation — a maximum elevation change of 840 m.
The land around Yōkaichiba is covered by trees (39%), cropland (37%) and artificial surfaces (20%) within 3 km, cropland (31%), trees (30%) and water (22%) within 16 km, and water (42%) and trees (24%) within 80 km.
Japan travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 100 V · 50 / 60 Hz
- Prices
- ≈ 65% of US
- price level, 2025
- GDP per capita
- $35,951
- 2025
- Happiness
- 6.1 / 10
- World Happiness, 2025
- Safe drinking water
- 99%
- of population, 2024
- Homicide rate
- 0.2
- per 100k, 2023
- Road deaths
- 3.6
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very low
- EF EPI 446
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Yōkaichiba (35.7°, 140.55°, elevation 10 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.