Cool
Average highs are around 18°C, so pack for cooler days.
April verdict
Karatsu, Japan in April
Weather score27Poor
Poor for holiday weather
Average highs are around 18°C, so pack for cooler days. Sunshine averages 5.5h per day, enough for a balanced month. Rainfall averages 182mm, so showers are a real planning factor.
April weather
Monthly averages
Temp
18°C
Rain
182mm
Sun
5.5h
Sea
15°C
Weather score
27
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 182mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.5h per day, enough for a balanced month.
Cool sea
Sea temperatures average 15°C, so the water can feel cool.
Map
Weather map
Compare Karatsu, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
April18°C average high
April is close to Karatsu's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
April182mm average rain
April sits near Karatsu's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to March and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
April5.5 hours average sun
April sits close to Karatsu's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay and August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
April15°C average sea
April is one of the coolest sea months, so the water may feel fresher than in peak months.
Warmest seaJuly to September
Sea temperatures are usually near 25°C in this stretch, so swimming comfort is at its strongest.
Weather score
April27 weather score
April scores below Karatsu's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsAugust to October
These months have the strongest weather score in the monthly averages.
Hotels near Karatsu, Japan
Marriott
Fairfield by Marriott Saga Ureshino OnsenUreshino, Saga, Japan
The Ritz-Carlton, FukuokaFukuoka, Japan
Four Points Flex by Sheraton Fukuoka HakataFukuoka, Fukuoka, Japan
Iki Retreat by Onko Chishin, a Member of Design Hotels™Iki, Nagasaki, Japan
Nagasaki Marriott HotelNagasaki, Nagasaki, Japan
Fairfield by Marriott Fukuoka UkihaUkiha, Fukuoka, Japan