Izumiōtsu weather in January

In January, Izumiōtsu sees average daytime highs of 9°C and overnight lows near 2°C, with 64 mm of precipitation across 8.1 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 25% 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 Izumiōtsu's 4th-clearest and 2nd-windiest month. For the whole year in context, see Izumiōtsu's year-round climate.

Daytime high
12th warmest
Overnight low
1st coldest
Precipitation
64 mm
8.1 wet days
Daylight
9 h 54 min
7:10 AM – 5:06 PM
Cloud cover
58%
4th clearest
Wind
9 km/h
2nd windiest
Solar energy
2.71 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 Izumiōtsu reaches about 9°C in the afternoon and slips back to 2°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 6°C and 12°C. Set against its neighbours, January runs about 3°C cooler than December and about 1°C cooler than February.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
1102
2102
3102
4102
5102
692
792
892
992
1092
1192
1292
1392
1492
1592
1692
1792
1892
1992
2092
2192
2292
2392
2491
2591
2691
2791
2891
2991
3091
3191

How January really feels in Izumiōtsu

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.

Izumiōtsu 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 / 648.11101.9
Feb10° / 698.61.110.72.3
Mar14° / 11211.60.111.73.8
Apr19° / 10°11410.4012.86.0
May24° / 15°13210.4013.86.7
Jun27° / 20°19913.6014.35.5
Jul31° / 24°17213.8014.14.1
Aug33° / 25°10010.4013.33.5
Sep29° / 21°15811.8012.25.3
Oct23° / 14°15610011.16.8
Nov17° / 848010.25.7
Dec12° / 688.40.29.73.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 31% of January, with mostly cloudy or overcast conditions the remaining 44%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26436
36436
46535
56436
66337
76238
86337
96238
106139
116040
125941
135743
145644
155545
165545
175446
185248
195248
205149
214951
225050
235050
244951
255050
265149
275149
285149
295248
305248
315347

Chance of precipitation in January

Any precipitationSnow

Izumiōtsu gets around 64 mm of rain and snow over 8.1 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 27% and peaks near 30% on the wettest days, and about 1 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1242
2242
3243
4233
5233
6233
7233
8233
9233
10243
11243
12253
13263
14263
15273
16273
17284
18284
19294
20294
21304
22304
23304
24305
25305
26305
27305
28295
29295
30285
31285

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 9 km/h in January.

Across January, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

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 7:10 AM to 7:04 AM, and sunset from 4:53 PM to 5:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.77:104:53
29.77:104:54
39.77:104:55
49.87:104:56
59.87:104:56
69.87:104:57
79.87:114:58
89.87:114:59
99.87:114:59
109.87:115:00
119.87:115:01
129.97:105:02
139.97:105:03
149.97:105:04
159.97:105:05
169.97:105:06
179.97:105:06
1810.07:095:07
1910.07:095:08
2010.07:095:09
2110.07:085:10
2210.07:085:11
2310.17:085:12
2410.17:075:13
2510.17:075:14
2610.17:065:15
2710.27:065:16
2810.27:055:17
2910.27:055:18
3010.27:045:19
3110.37:045:20

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.71 kWh/m².

For context, solar energy here swings from a low near 2.42 kWh/m² to a high of 5.49 kWh/m² in May across the year — January's 2.71 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
12.6Moderate
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
172.7Moderate
182.7Moderate
192.7Moderate
202.7Moderate
212.7Moderate
222.8Moderate
232.8Moderate
242.8Moderate
252.8Moderate
262.9Moderate
272.9Moderate
282.9Moderate
292.9Moderate
303.0Moderate
313.0Moderate
Planning a trip in January

Hazard calendar for Izumiōtsu

In seasonPeak

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

Izumiōtsu 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 Izumiōtsu?

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 Izumiōtsu.

What to pack for Izumiōtsu in January

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

In January, Izumiōtsu sees daytime highs around 9°C and nights near 2°C. Pack a warm layer. Worth having: rain gear. About 8 days see rain.

a warm layerrain gear

Sea temperature near Izumiōtsu in January

The nearest coast averages about 14°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 14 km away) is warmest in August at about 27°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 6 to Nov 11 — about 5.2 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Izumiōtsu 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 Izumiōtsu peaks around June 23 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highModerateJun 23UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug7High
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Izumiōtsu 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 Izumiōtsu is worst in April — around 23 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (October, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1423 µg/m³Oct 1713 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb17Moderate
Mar22Moderate
Apr23Moderate
May22Moderate
Jun19Moderate
Jul17Moderate
Aug18Moderate
Sep14Moderate
Oct13Moderate
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Izumiōtsu?

Izumiōtsu sits at 34.5°N, 135.4°E, 3 m above sea level, in Japan. The nearest listed city is Tadaoka-higashi, 1.0 km away.

Topography around Izumiōtsu

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

Within 3 km, the terrain around Izumiōtsu has only modest variations in elevation — a maximum elevation change of 33 m around an average of 7 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 765 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,879 m.

The land around Izumiōtsu is covered by artificial surfaces (71%) and water (22%) within 3 km, water (41%) and artificial surfaces (36%) within 16 km, and trees (58%) and water (23%) within 80 km.

3 km
33 m
16 km
765 m
80 km
1,879 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Tadaoka-higashi 1.0 km · Takaishi 4.0 km · Izumi 4.0 km · Kishiwada 5.0 km · Kaizuka 7.0 km · Sakai 11 km · Ōkubo-naka 12 km · Izumisano 12 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 Izumiōtsu (34.5°, 135.4°, elevation 3 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).