Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
Weather Guide
Sendai, Miyagi, Japan Average Monthly Weather
Weather score34Poor annual avg
Best months: August, July, September
Across the year, average daytime temperatures are around 17°C, sunshine averages 5h per day, and rainfall totals about 1166mm. Sea temperatures average 15°C across the year.
Annual weather
Annual averages
Temp
17°C
Rain
1166mm
Annual total
Sun
5h
Sea
15°C
Weather score
34
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 153mm, so some wet days are possible.
Some sun
Sunshine averages 5.5h per day, enough for a balanced month.
Swimmable
Sea temperatures average 24°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Sendai, Miyagi, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August29°C average high
August is one of Sendai's warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
August153mm average rain
August is wetter than Sendai's yearly average, so flexible plans matter more.
Driest monthsJanuary to March and November to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August5.5 hours average sun
August sits close to Sendai's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsApril to May
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
August24°C average sea
August is one of Sendai's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 21°C in this stretch, so swimming comfort is at its strongest.
Weather score
August59 weather score
August is one of Sendai's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
