Mild
Average highs are around 20°C, so days are mild rather than hot.
January verdict
Ishigaki, Japan in January
Weather score39Poor
Poor for holiday weather
Average highs are around 20°C, so days are mild rather than hot. Sunshine averages 2.6h per day, so this is not one of the brighter months. Rainfall averages 147mm, so some wet days are possible.
January weather
Monthly averages
Temp
20°C
Rain
147mm
Sun
2.6h
Sea
23°C
Weather score
39
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 147mm, so some wet days are possible.
Limited sun
Sunshine averages 2.6h per day, so this is not one of the brighter months.
Swimmable
Sea temperatures average 23°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Ishigaki, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
January20°C average high
January is cooler than the yearly average, which can make sightseeing feel gentler than in hotter months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
January147mm average rain
January sits on the drier side of Ishigaki's year, which helps with sightseeing and transfers.
Driest monthsJanuary to April, July, and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
January2.6 hours average sun
January is one of Ishigaki's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsJuly to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
January23°C average sea
January is one of the coolest sea months, so the water may feel fresher than in peak months.
Warmest seaJune to September
Sea temperatures are usually near 28°C in this stretch, so swimming comfort is at its strongest.
Weather score
January39 weather score
January is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsApril to November
These months have the strongest weather score in the monthly averages.
