Iijima weather in January

In January, Iijima sees average daytime highs of 5°C and overnight lows near 0°C, with 211 mm of precipitation across 23.3 wet days and about 9.8 hours of daylight. It is the 12th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 5°C through the month. The sky is clear or mostly clear about 10% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 36 min at the start of January to 10 h 12 min by month's end. Set against the rest of the year, January is Iijima's 10th-clearest and 1st-windiest month. For the whole year in context, see Iijima's year-round climate.

Daytime high
12th warmest
Overnight low
2nd coldest
Precipitation
211 mm
23.3 wet days
Daylight
9 h 48 min
7:10 AM – 4:58 PM
Cloud cover
69%
10th clearest
Wind
14 km/h
1st windiest
Solar energy
2.5 kWh/m²
Travel score
0.1
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 5°C through the month.

A typical January day in Iijima reaches about 5°C in the afternoon and slips back to 0°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 2°C and 9°C. Set against its neighbours, January runs about 3°C cooler than December and on par with February.

-5°10°151015202531
Avg high (°C)Avg low (°C)
161
261
361
461
561
661
760
850
950
1050
1150
1250
1350
1450
1550
1650
1750
1850
1950
2050
2150
2250
2350
2450
2550
2650
2750
285-1
295-1
305-1
315-1

How January really feels in Iijima

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.

Iijima weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 21123.315.99.80.1
Feb / 15118.312.210.60.2
Mar / 16916.95.811.71.7
Apr15° / 15013.50.912.94.1
May19° / 13°16613.1013.95.8
Jun23° / 18°20013.7014.45.9
Jul27° / 22°27116.7014.25.3
Aug28° / 23°16613.2013.45.4
Sep25° / 19°22314.2012.26.0
Oct19° / 14°17413.6011.15.7
Nov14° / 17216.20.610.13.5
Dec / 222229.79.61.1

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 20% of January, with mostly cloudy or overcast conditions the remaining 70%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13466
23367
33367
43367
53367
63367
73367
83268
93268
103268
113169
123169
133169
143070
153070
163070
172971
182971
192872
202872
212872
222872
232773
242773
252773
262773
272773
282773
292872
302872
312872

Chance of precipitation in January

Any precipitationSnow

Iijima gets around 211 mm of rain and snow over 23.3 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 75% and peaks near 77% on the wettest days, and about 16 days bring snow.

0%20%40%60%80%151015202531
Rain chance (%)Snow chance (%)
17647
27647
37648
47648
57648
67548
77548
87447
97447
107347
117347
127247
137247
147248
157248
167249
177250
187250
197351
207452
217453
227554
237554
247655
257656
267756
277756
287756
297656
307656
317656

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

Across January, daily wind ranges from about 14 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 36 min at the start of January to 10 h 12 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 7:03 AM, and sunset from 4:45 PM to 5:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.67:104:45
29.67:104:46
39.67:104:47
49.67:114:47
59.67:114:48
69.67:114:49
79.77:114:50
89.77:114:51
99.77:114:52
109.77:114:52
119.77:114:53
129.77:114:54
139.77:104:55
149.87:104:56
159.87:104:57
169.87:104:58
179.87:104:59
189.87:095:00
199.97:095:01
209.97:095:02
219.97:085:03
229.97:085:04
2310.07:085:05
2410.07:075:06
2510.07:075:07
2610.07:065:08
2710.17:055:09
2810.17:055:10
2910.17:045:11
3010.17:045:12
3110.27:035:13

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.5 kWh/m².

For context, solar energy here swings from a low near 2.09 kWh/m² to a high of 5.61 kWh/m² in May across the year — January's 2.5 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.3Moderate
22.3Moderate
32.3Moderate
42.3Moderate
52.3Moderate
62.3Moderate
72.3Moderate
82.3Moderate
92.3Moderate
102.4Moderate
112.4Moderate
122.4Moderate
132.4Moderate
142.4Moderate
152.4Moderate
162.5Moderate
172.5Moderate
182.5Moderate
192.5Moderate
202.5Moderate
212.6Moderate
222.6Moderate
232.6Moderate
242.6Moderate
252.7Moderate
262.7Moderate
272.7Moderate
282.8Moderate
292.8Moderate
302.8Moderate
312.9Moderate
Planning a trip in January

Hazard calendar for Iijima

In seasonPeak

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

Iijima 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 Iijima?

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

0.1
Sightseeing
12th-best month of the year
0.0
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in Iijima.

What to pack for Iijima in January

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

In January, Iijima sees daytime highs around 5°C and nights near 0°C. Pack a warm layer and rain gear. Worth having: a heavy coat. About 23 days see rain.

a warm layerrain geara heavy coat

Sea temperature near Iijima in January

The nearest coast averages about 13°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 21 km away) is warmest in August at about 27°C and coldest in March near 11°C.

It's comfortable for a long swim from Jun 16 to Nov 5 — about 4.7 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb12Bracing
Mar11Bracing
Apr13Bracing
May16Cool
Jun20Refreshing
Jul24Refreshing
Aug27Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Iijima in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Iijima peaks around July 17 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJul 17UV 10Jan 10UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun10Very high
Jul10Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec3Moderate

Air quality in Iijima 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 Iijima is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1620 µg/m³Dec 1310 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar19Moderate
Apr20Moderate
May19Moderate
Jun17Moderate
Jul13Moderate
Aug12Good
Sep11Good
Oct10Good
Nov11Good
Dec10Good
Location & terrain

Where is Iijima?

Iijima sits at 36.1°N, 136.4°E, 51 m above sea level, in Japan. The nearest listed city is Maruoka, 11 km away.

Topography around Iijima

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

Within 3 km, the terrain around Iijima has large variations in elevation — a maximum elevation change of 742 m around an average of 210 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,359 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,671 m.

The land around Iijima is covered by trees (77%) within 3 km, trees (69%) within 16 km, and trees (59%) and water (30%) within 80 km.

3 km
742 m
16 km
1,359 m
80 km
2,671 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Maruoka 11 km · Fukui-shi 13 km · Katsuyama 13 km · Sakai 16 km · Ono 17 km · Awara 21 km · Sabae 22 km · Kaga 23 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 Iijima (36.09°, 136.3599°, elevation 51 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).