Ishigaki weather in January

In January, Ishigaki sees average daytime highs of 21°C and overnight lows near 19°C, with 155 mm of rain across 16.8 wet days and about 10.7 hours of daylight. It is the 12th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 21°C through the month. The sky is clear or mostly clear about 12% of the time in January, and the air most often feels dry.

Daylight stretches from about 10 h 30 min at the start of January to 10 h 54 min by month's end. Set against the rest of the year, January is Ishigaki's 12th-clearest and 3rd-windiest month. For the whole year in context, see Ishigaki's year-round climate.

Daytime high
21°
12th warmest
Overnight low
19°
1st coldest
Rainfall
155 mm
16.8 wet days
Daylight
10 h 36 min
7:33 AM – 6:12 PM
Cloud cover
76%
12th clearest
Wind
30 km/h
3rd windiest
Solar energy
2.51 kWh/m²
Travel score
5.2
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 21°C through the month.

A typical January day in Ishigaki reaches about 21°C in the afternoon and slips back to 19°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 23°C. Set against its neighbours, January runs about 1°C cooler than December and on par with February.

15°18°20°23°25°151015202531
Avg high (°C)Avg low (°C)
12119
22119
32119
42119
52119
62119
72119
82119
92119
102119
112119
122119
132119
142119
152119
162119
172119
182119
192119
202119
212119
222119
232018
242018
252018
262018
272018
282018
292018
302018
312018

How January really feels in Ishigaki

Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 0 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
0
wind chill below the day's low

January sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Ishigaki weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan21° / 19°15516.810.75.2
Feb21° / 19°11213.911.25.4
Mar22° / 20°12213.911.85.9
Apr24° / 22°14813.112.66.3
May26° / 25°16514.413.25.9
Jun28° / 27°16114.213.55.2
Jul29° / 28°1281313.45.2
Aug29° / 27°23216.612.84.8
Sep28° / 27°22315.812.25.3
Oct26° / 25°14013.711.46.1
Nov25° / 23°14514.110.86.2
Dec22° / 20°15415.310.55.7

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in January, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of January, with mostly cloudy or overcast conditions the remaining 76%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12773
22773
32674
42575
52575
62476
72575
82575
92575
102575
112575
122575
132575
142476
152476
162377
172377
182377
192476
202377
212377
222377
232377
242377
252377
262377
272377
282377
292377
302377
312377

Chance of precipitation in January

Any precipitation

Ishigaki gets around 155 mm of rain over 16.8 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 54% and peaks near 57% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
151
251
352
452
552
653
753
853
953
1053
1153
1253
1353
1453
1554
1654
1754
1854
1954
2055
2155
2256
2356
2456
2557
2657
2757
2856
2956
3056
3155

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 34% of days. Sticky, muggy-or-worse air turns up on roughly 13% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1322629131
2322529131
3322529141
4322429141
5322429141
6332429141
7332329141
8332329141
9332329151
10332328151
11322328151
12332428151
13332427151
14332527141
15332527141
16332626131
17332626131
18342726121
19342826121
20342825111
21342925111
22342925111
23353025101
24353024101
25353124100
26353124100
2736322390
2836312390
2936322390
3036312390
31363122100

Wind in January

Winds average 30 km/h in January.

Across January, daily wind ranges from about 30 km/h on the calmest days to 30 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
130windy
230windy
330windy
430windy
530windy
630windy
730windy
830windy
930windy
1030windy
1130windy
1230windy
1330windy
1430windy
1530windy
1630windy
1730windy
1830windy
1930windy
2030windy
2130windy
2230windy
2330windy
2430windy
2530windy
2630windy
2730windy
2830windy
2930windy
3030windy
3130windy

Sunrise & sunset in January

DaylightNight

Daylight runs from about 10 h 30 min at the start of January to 10 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over January. Sunrise moves from 7:31 AM to 7:31 AM, and sunset from 6:02 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.57:316:02
210.57:316:03
310.57:326:03
410.57:326:04
510.57:326:05
610.57:326:05
710.67:326:06
810.67:336:06
910.67:336:07
1010.67:336:08
1110.67:336:09
1210.67:336:09
1310.67:336:10
1410.67:336:11
1510.67:336:11
1610.67:336:12
1710.77:336:13
1810.77:336:13
1910.77:336:14
2010.77:336:15
2110.77:336:16
2210.77:336:16
2310.77:336:17
2410.87:336:18
2510.87:326:18
2610.87:326:19
2710.87:326:20
2810.87:326:21
2910.87:316:21
3010.87:316:22
3110.97:316:23

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.51 kWh/m².

For context, solar energy here swings from a low near 2.42 kWh/m² to a high of 6.37 kWh/m² in July across the year — January's 2.51 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.4Moderate
22.4Moderate
32.4Moderate
42.4Moderate
52.4Moderate
62.4Moderate
72.4Moderate
82.4Moderate
92.4Moderate
102.5Moderate
112.5Moderate
122.5Moderate
132.5Moderate
142.5Moderate
152.5Moderate
162.5Moderate
172.5Moderate
182.5Moderate
192.5Moderate
202.5Moderate
212.5Moderate
222.5Moderate
232.5Moderate
242.5Moderate
252.6Moderate
262.6Moderate
272.6Moderate
282.6Moderate
292.6Moderate
302.7Moderate
312.7Moderate
Planning a trip in January

Hazard calendar for Ishigaki

In seasonPeak

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

Ishigaki 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 Ishigaki?

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

5.2
Sightseeing
9th-best month of the year
3.1
Beach & pool
12th-best month of the year

January is a reasonable time to visit Ishigaki for sightseeing.

What to pack for Ishigaki in January

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

In January, Ishigaki sees daytime highs around 21°C and nights near 19°C. Pack rain gear and a windbreaker. About 17 days see rain.

rain geara windbreaker

Sea temperature near Ishigaki in January

The nearest coast averages about 23°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 July at about 29°C and coldest in February near 23°C.

The water stays above 20°C all year — warm enough for a swim any month.

22°24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan23Refreshing
Feb23Refreshing
Mar23Refreshing
Apr25Warm
May26Warm
Jun28Tropical
Jul29Tropical
Aug29Tropical
Sep28Tropical
Oct27Warm
Nov26Warm
Dec25Warm

UV index in Ishigaki in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ishigaki peaks around June 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highVery highExtremeVery highHighJun 20UV 12Dec 20UV 5
UV index (midday)Level
Jan6High
Feb8Very high
Mar10Extreme
Apr9Very high
May10Very high
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep11Extreme
Oct8Very high
Nov7High
Dec5High

Air quality in Ishigaki 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 Ishigaki is worst in March — around 15 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (June, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 1815 µg/m³Jun 207 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb12Moderate
Mar15Moderate
Apr13Moderate
May9Good
Jun7Good
Jul8Good
Aug9Good
Sep8Good
Oct9Good
Nov10Good
Dec11Good
Location & terrain

Where is Ishigaki?

Ishigaki sits at 24.3°N, 124.2°E, 18 m above sea level, in Japan. The nearest listed city is Hirara, 127 km away.

Topography around Ishigaki

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

Within 3 km, the terrain around Ishigaki has only modest variations in elevation — a maximum elevation change of 217 m around an average of 22 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 528 m; within 80 km, significant variations in elevation — a maximum elevation change of 517 m.

The land around Ishigaki is covered by water (37%), artificial surfaces (22%) and trees (20%) within 3 km, water (78%) within 16 km, and water (96%) within 80 km.

3 km
217 m
16 km
528 m
80 km
517 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Hirara 127 km · Miyakojima 127 km · Yilan 247 km · Jiufen 249 km · Xiulin 258 km · Keelung 259 km · Hualien 262 km · Xizhi 265 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 Ishigaki (24.3448°, 124.1572°, elevation 18 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).