Susaki weather in January

In January, Susaki sees average daytime highs of 9°C and overnight lows near 1°C, with 69 mm of precipitation across 6.4 wet days and about 10 hours of daylight. It is the 12th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 9°C through the month. The sky is clear or mostly clear about 32% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 48 min at the start of January to 10 h 18 min by month's end. Set against the rest of the year, January is Susaki's 4th-clearest and 1st-windiest month. For the whole year in context, see Susaki's year-round climate.

Daytime high
12th warmest
Overnight low
1st coldest
Precipitation
69 mm
6.4 wet days
Daylight
10 hours
7:16 AM – 5:17 PM
Cloud cover
54%
4th clearest
Wind
10 km/h
1st windiest
Solar energy
2.83 kWh/m²
Travel score
1.9
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 9°C through the month.

A typical January day in Susaki reaches about 9°C in the afternoon and slips back to 1°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 5°C and 12°C. Set against its neighbours, January runs about 2°C cooler than December and about 1°C cooler than February.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
1102
292
392
492
592
692
791
891
991
1091
1191
1291
1391
1491
1591
1691
1791
1891
1991
2091
2191
2281
2381
2481
2581
2681
2781
2891
2991
3091
3191

How January really feels in Susaki

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
wind chill below the day's low

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

Susaki weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 696.41.3101.9
Feb10° / 968.51.510.82.3
Mar14° / 159120.411.73.8
Apr18° / 20111.70.112.85.6
May22° / 14°24213.4013.76.1
Jun25° / 18°37219.7014.24.9
Jul29° / 22°38422.40144.0
Aug29° / 23°32522.4013.23.8
Sep27° / 20°34218.3012.25.2
Oct22° / 14°23011.4011.26.6
Nov17° / 1148.4010.35.5
Dec11° / 876.60.59.83.1

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 26% of January, with mostly cloudy or overcast conditions the remaining 42%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16733
26733
36733
46634
56535
66535
76436
86238
96238
106139
115941
125842
135842
145644
155545
165545
175446
185446
195446
205347
215347
225347
235248
245248
255347
265347
275446
285446
295545
305545
315545

Chance of precipitation in January

Any precipitationSnow

Susaki gets around 69 mm of rain and snow over 6.4 wet days in January, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 21% and peaks near 25% on the wettest days, and about 1 day brings snow. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1174
2174
3174
4174
5174
6184
7184
8184
9194
10194
11204
12214
13214
14224
15224
16234
17235
18245
19245
20245
21245
22245
23245
24245
25245
26245
27245
28246
29246
30246
31256

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 10 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 48 min at the start of January to 10 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over January. Sunrise moves from 7:15 AM to 7:10 AM, and sunset from 5:05 PM to 5:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.87:155:05
29.87:165:05
39.87:165:06
49.87:165:07
59.97:165:08
69.97:165:08
79.97:165:09
89.97:165:10
99.97:165:11
109.97:165:11
119.97:165:12
129.97:165:13
1310.07:165:14
1410.07:165:15
1510.07:165:16
1610.07:165:17
1710.07:165:17
1810.17:155:18
1910.17:155:19
2010.17:155:20
2110.17:145:21
2210.17:145:22
2310.27:145:23
2410.27:135:24
2510.27:135:25
2610.27:135:26
2710.27:125:27
2810.37:125:28
2910.37:115:29
3010.37:115:29
3110.37:105:30

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.83 kWh/m².

For context, solar energy here swings from a low near 2.55 kWh/m² to a high of 5.53 kWh/m² in May across the year — January's 2.83 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
12.7Moderate
22.7Moderate
32.7Moderate
42.7Moderate
52.7Moderate
62.7Moderate
72.7Moderate
82.7Moderate
92.7Moderate
102.7Moderate
112.7Moderate
122.7Moderate
132.7Moderate
142.7Moderate
152.8Moderate
162.8Moderate
172.8Moderate
182.8Moderate
192.8Moderate
202.8Moderate
212.9Moderate
222.9Moderate
232.9Moderate
242.9Moderate
253.0Moderate
263.0Moderate
273.0Moderate
283.0Moderate
293.1Moderate
303.1Moderate
313.1Moderate
Planning a trip in January

Hazard calendar for Susaki

In seasonPeak

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

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

Susaki's rainy season runs April–October, when most of the year's rain falls.

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

Is January a good time to visit Susaki?

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

1.9
Sightseeing
12th-best month of the year
0.0
Beach & pool
11th-best month of the year

January is a weaker month for outdoor sightseeing in Susaki.

What to pack for Susaki in January

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

In January, Susaki sees daytime highs around 9°C and nights near 1°C. Pack a warm layer. About 6 days see rain.

a warm layer

Sea temperature near Susaki in January

The nearest coast averages about 18°C in January — 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 28°C and coldest in February near 17°C.

It's comfortable for a long swim from May 8 to Dec 15 — about 7.3 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan18Cool
Feb17Cool
Mar17Cool
Apr18Cool
May21Refreshing
Jun23Refreshing
Jul26Warm
Aug28Warm
Sep27Warm
Oct25Warm
Nov23Refreshing
Dec20Cool

UV index in Susaki in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Susaki peaks around July 11 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJul 11UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr7High
May9Very high
Jun10Extreme
Jul11Extreme
Aug10Very high
Sep10Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Susaki 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 Susaki is worst in April — around 22 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1321 µg/m³Oct 1311 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb16Moderate
Mar20Moderate
Apr22Moderate
May19Moderate
Jun16Moderate
Jul13Moderate
Aug12Moderate
Sep11Good
Oct11Good
Nov12Good
Dec11Good
Location & terrain

Where is Susaki?

Susaki sits at 33.4°N, 133.3°E, 6 m above sea level, in Japan. The nearest listed city is Tosa, 19 km away.

Topography around Susaki

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

Within 3 km, the terrain around Susaki has significant variations in elevation — a maximum elevation change of 327 m around an average of 50 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,002 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,894 m.

The land around Susaki is covered by trees (52%) and water (23%) within 3 km, trees (60%) and water (34%) within 16 km, and trees (61%) and water (34%) within 80 km.

3 km
327 m
16 km
1,002 m
80 km
1,894 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Tosa 19 km · Ino 22 km · Kochi 28 km · Shinagawa 38 km · Nankoku 38 km · Yamashita 43 km · Tosayamadachō-nakano 43 km · Nakamura 57 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 Susaki (33.3947°, 133.2913°, elevation 6 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).