Yakumo weather in January

In January, Yakumo sees average daytime highs of -1°C and overnight lows near -5°C, with 60 mm of precipitation across 12.7 wet days and about 9.3 hours of daylight. It is the 12th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near -1°C through the month. The sky is clear or mostly clear about 7% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 hours at the start of January to 9 h 42 min by month's end. Set against the rest of the year, January is Yakumo's 11th-clearest and 2nd-windiest month. For the whole year in context, see Yakumo's year-round climate.

Daytime high
-1°
12th warmest
Overnight low
-5°
1st coldest
Precipitation
60 mm
12.7 wet days
Daylight
9 h 12 min
7:11 AM – 4:25 PM
Cloud cover
72%
11th clearest
Wind
18 km/h
2nd windiest
Solar energy
1.9 kWh/m²
Travel score
0.0
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near -1°C through the month.

A typical January day in Yakumo reaches about -1°C in the afternoon and slips back to -5°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between -5°C and 2°C. Set against its neighbours, January runs about 2°C cooler than December and on par with February.

-10°-5°151015202531
Avg high (°C)Avg low (°C)
1-1-4
2-1-4
3-1-4
4-1-4
5-1-4
6-1-4
7-1-4
8-1-4
9-1-4
10-1-4
11-1-4
12-1-5
13-1-5
14-2-5
15-2-5
16-2-5
17-2-5
18-2-5
19-2-5
20-2-5
21-2-5
22-2-5
23-2-5
24-2-5
25-2-5
26-2-5
27-2-5
28-2-5
29-2-5
30-2-5
31-2-5

How January really feels in Yakumo

Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 31 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
31
28 feel bitter (≤ -10°C)

The story in January is cold — wind chill drags the overnight "feels like" below the raw low.

Yakumo weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -5°6012.7179.30.0
Feb-1° / -4°569.912.410.30.0
Mar / -2°65118.811.60.0
Apr / 8510.52.313.10.5
May11° / 11611.6014.42.7
Jun16° / 13°11211.60154.8
Jul20° / 17°17214.8014.85.5
Aug22° / 19°20013.7013.76.0
Sep20° / 17°17613.1012.35.7
Oct14° / 10°11512.8010.83.7
Nov / 9712.94.79.60.6
Dec / -2°8413.614.790.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 21% of January, with mostly cloudy or overcast conditions the remaining 72%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12872
22872
32872
42872
52872
62872
72872
82872
92872
102872
112872
122872
132971
142971
152971
162872
172971
182971
192971
202872
212872
222872
232773
242773
252773
262773
272773
282773
292773
302773
312773

Chance of precipitation in January

Any precipitationSnow

Yakumo gets around 60 mm of rain and snow over 12.7 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 41% and peaks near 44% on the wettest days, and about 17 days bring snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
14455
24455
34356
44356
54356
64256
74256
84256
94156
104156
114156
124156
134155
144055
154055
164055
174055
184054
193954
203954
214054
224054
234054
244054
253954
263953
273953
283952
293852
303851
313851

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in January

Winds average 18 km/h in January.

Across January, daily wind ranges from about 17 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 hours at the start of January to 9 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over January. Sunrise moves from 7:13 AM to 7:01 AM, and sunset from 4:11 PM to 4:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.07:134:11
29.07:134:12
39.07:134:13
49.07:134:13
59.07:134:14
69.07:134:15
79.07:134:16
89.17:134:17
99.17:134:18
109.17:134:19
119.17:134:20
129.17:134:21
139.27:124:22
149.27:124:23
159.27:124:24
169.27:114:25
179.37:114:26
189.37:104:27
199.37:104:29
209.37:094:30
219.47:094:31
229.47:084:32
239.47:084:33
249.57:074:35
259.57:064:36
269.57:054:37
279.67:054:38
289.67:044:39
299.67:034:41
309.77:024:42
319.77:014:43

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.9 kWh/m².

For context, solar energy here swings from a low near 1.54 kWh/m² to a high of 5.4 kWh/m² in May across the year — January's 1.9 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
11.7Dim
21.7Dim
31.7Dim
41.7Dim
51.7Dim
61.7Dim
71.7Dim
81.7Dim
91.8Dim
101.8Dim
111.8Dim
121.8Dim
131.8Dim
141.8Dim
151.8Dim
161.9Dim
171.9Dim
181.9Dim
191.9Dim
201.9Dim
212.0Dim
222.0Moderate
232.0Moderate
242.0Moderate
252.1Moderate
262.1Moderate
272.1Moderate
282.2Moderate
292.2Moderate
302.2Moderate
312.3Moderate
Planning a trip in January

Hazard calendar for Yakumo

In seasonPeak

In January, Yakumo sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Yakumo sits in the Pacific typhoon belt; the season peaks July–October.

Pacific typhoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is January a good time to visit Yakumo?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

0.0
Sightseeing
9th-best month of the year
0.0
Beach & pool
7th-best month of the year

January is a weaker month for outdoor sightseeing in Yakumo.

What to pack for Yakumo in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Yakumo sees daytime highs around -1°C and nights near -5°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 13 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Yakumo in January

The nearest coast averages about 7°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 16 km away) is warmest in August at about 21°C and coldest in February near 4°C.

It's comfortable for a long swim from Aug 5 to Sep 17 — about 1.4 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan7Bracing
Feb4Bracing
Mar4Bracing
Apr6Bracing
May9Bracing
Jun14Bracing
Jul18Cool
Aug21Refreshing
Sep20Refreshing
Oct17Cool
Nov12Bracing
Dec9Bracing

UV index in Yakumo in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Yakumo peaks around August 18 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighVery highHighModerateLowAug 18UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr5High
May8Very high
Jun7High
Jul5Moderate
Aug9Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Yakumo in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Yakumo is worst in April — around 17 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1417 µg/m³Dec 177 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb11Good
Mar16Moderate
Apr17Moderate
May15Moderate
Jun9Good
Jul8Good
Aug8Good
Sep7Good
Oct9Good
Nov8Good
Dec7Good
Location & terrain

Where is Yakumo?

Yakumo sits at 42.3°N, 140.3°E, 9 m above sea level, in Japan. The nearest listed city is Honchō, 53 km away.

Topography around Yakumo

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Yakumo.

Within 3 km, the terrain around Yakumo has only modest variations in elevation — a maximum elevation change of 85 m around an average of 17 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 963 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,867 m.

The land around Yakumo is covered by cropland (49%) and water (22%) within 3 km, trees (59%) and water (30%) within 16 km, and water (54%) and trees (41%) within 80 km.

3 km
85 m
16 km
963 m
80 km
1,867 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Honchō 53 km · Date 55 km · Hokuto 57 km · Kamiiso 57 km · Muroran 60 km · Hakodate 66 km · Niseko 71 km · Noboribetsu 78 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
Shintoism 49%Buddhism 46%other 4%Christianity 1%

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 Yakumo (42.2539°, 140.2692°, elevation 9 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).