Sumoto weather in January

In January, Sumoto sees average daytime highs of 10°C and overnight lows near 6°C, with 96 mm of precipitation across 13.8 wet days and about 10 hours of daylight. It is the 12th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 10°C through the month. The sky is clear or mostly clear about 23% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 42 min at the start of January to 10 h 18 min by month's end. Set against the rest of the year, January is Sumoto's 9th-clearest and 1st-windiest month. For the whole year in context, see Sumoto's year-round climate.

Daytime high
10°
12th warmest
Overnight low
2nd coldest
Precipitation
96 mm
13.8 wet days
Daylight
9 h 54 min
7:12 AM – 5:08 PM
Cloud cover
61%
9th clearest
Wind
25 km/h
1st windiest
Solar energy
2.68 kWh/m²
Travel score
2.0
out of 10

Sumoto is city in Hyōgo Prefecture, Japan.

Density
231/km²
people per km²
Founded
2006

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 10°C through the month.

A typical January day in Sumoto reaches about 10°C in the afternoon and slips back to 6°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 13°C. Set against its neighbours, January runs about 3°C cooler than December and on par with February.

10°15°151015202531
Avg high (°C)Avg low (°C)
1117
2117
3117
4107
5107
6107
7107
8107
9107
10107
11107
12107
13107
14107
15106
16106
17106
18106
19106
20106
2196
2296
2396
2496
2596
2696
2796
2896
2996
3096
3196

Sumoto 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
Jan10° / 9613.80.6102.0
Feb10° / 9412.50.810.72.2
Mar13° / 13012.8011.73.4
Apr16° / 13°13310.8012.85.0
May19° / 17°15710.3013.86.1
Jun22° / 20°22713.2014.25.8
Jul26° / 24°18311.3014.16.4
Aug27° / 26°998.4013.36.8
Sep25° / 23°19011.8012.26.5
Oct22° / 18°19010.8011.16.6
Nov17° / 14°1039.2010.25.6
Dec12° / 9812.30.29.73.3

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 27% of January, with mostly cloudy or overcast conditions the remaining 51%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25644
35644
45644
55644
65644
75545
85545
95446
105347
115347
125248
135149
145050
155050
165050
174852
184753
194654
204654
214456
224456
234456
244357
254357
264555
274456
284456
294654
304654
314555

Chance of precipitation in January

Any precipitationSnow

Sumoto gets around 96 mm of rain and snow over 13.8 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 45% and peaks near 49% on the wettest days, and about 1 day brings snow. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1411
2411
3411
4411
5401
6401
7411
8411
9411
10411
11421
12421
13432
14432
15442
16442
17452
18462
19472
20472
21483
22483
23493
24493
25493
26493
27493
28493
29493
30493
31493

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 (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
10991
11991
12991
13991
14991
15991
16991
17991
18991
19991
20991
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in January

Winds average 25 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 25 km/h on the calmest days to 25 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
125breezy
225breezy
325breezy
425breezy
525breezy
625breezy
725breezy
825breezy
925breezy
1025breezy
1125breezy
1225breezy
1325breezy
1425breezy
1525breezy
1625breezy
1725breezy
1825breezy
1925breezy
2025breezy
2125breezy
2225breezy
2325breezy
2425breezy
2525breezy
2625breezy
2725breezy
2825breezy
2925breezy
3025breezy
3125breezy

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 42 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 36 minutes over January. Sunrise moves from 7:11 AM to 7:05 AM, and sunset from 4:56 PM to 5:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.77:114:56
29.77:124:57
39.87:124:57
49.87:124:58
59.87:124:59
69.87:125:00
79.87:125:00
89.87:125:01
99.87:125:02
109.87:125:03
119.97:125:04
129.97:125:04
139.97:125:05
149.97:125:06
159.97:125:07
169.97:125:08
1710.07:115:09
1810.07:115:10
1910.07:115:11
2010.07:115:12
2110.07:105:13
2210.17:105:13
2310.17:095:14
2410.17:095:15
2510.17:095:16
2610.27:085:17
2710.27:085:18
2810.27:075:19
2910.27:075:20
3010.37:065:21
3110.37:055:22

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.68 kWh/m².

For context, solar energy here swings from a low near 2.41 kWh/m² to a high of 5.58 kWh/m² in May across the year — January's 2.68 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.5Moderate
22.6Moderate
32.6Moderate
42.6Moderate
52.6Moderate
62.6Moderate
72.6Moderate
82.6Moderate
92.6Moderate
102.6Moderate
112.6Moderate
122.6Moderate
132.6Moderate
142.6Moderate
152.6Moderate
162.6Moderate
172.6Moderate
182.6Moderate
192.7Moderate
202.7Moderate
212.7Moderate
222.7Moderate
232.8Moderate
242.8Moderate
252.8Moderate
262.8Moderate
272.9Moderate
282.9Moderate
292.9Moderate
302.9Moderate
313.0Moderate
Planning a trip in January

Hazard calendar for Sumoto

In seasonPeak

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

Sumoto 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 Sumoto?

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

2.0
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 Sumoto.

What to pack for Sumoto in January

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

In January, Sumoto sees daytime highs around 10°C and nights near 6°C. Pack a warm layer. Worth having: rain gear and a windbreaker. About 14 days see rain.

a warm layerrain geara windbreaker

Sea temperature near Sumoto in January

The nearest coast averages about 15°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 27°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 5 to Nov 16 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr16Cool
May18Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Refreshing
Dec17Cool

UV index in Sumoto in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sumoto peaks around July 10 at about 10 (very high) — 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 — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 10UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug8Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Sumoto 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 Sumoto is worst in April — around 26 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1625 µg/m³Oct 1914 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb19Moderate
Mar24Moderate
Apr26Moderate
May24Moderate
Jun21Moderate
Jul22Moderate
Aug24Moderate
Sep17Moderate
Oct14Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Sumoto?

Sumoto sits at 34.3°N, 134.9°E, -1 m above sea level, in Japan. The nearest listed city is Minamiawaji, 13 km away.

Topography around Sumoto

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

Within 3 km, the terrain around Sumoto has only modest variations in elevation — a maximum elevation change of 233 m around an average of 40 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 600 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,606 m.

The land around Sumoto is covered by trees (45%) and water (24%) within 3 km, water (50%) and trees (35%) within 16 km, and trees (42%) and water (41%) within 80 km.

3 km
233 m
16 km
600 m
80 km
1,606 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Minamiawaji 13 km · Awaji 15 km · Fukura 19 km · Minato 28 km · Wakayama 28 km · Narutochō-mitsuishi 30 km · Hannan 33 km · Sennan 35 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 Sumoto (34.3432°, 134.8891°, elevation -1 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).