Mild
Average highs are around 23°C, so days are mild rather than hot.
September verdict
Shiroishi, Japan in September
Weather score43Mixed
Mixed for holiday weather
Average highs are around 23°C, so days are mild rather than hot. Sunshine averages 4.1h per day, so this is not one of the brighter months. Rainfall averages 164mm, so some wet days are possible.
September weather
Monthly averages
Temp
23°C
Rain
164mm
Sun
4.1h
Sea
23°C
Weather score
43
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 164mm, so some wet days are possible.
Limited sun
Sunshine averages 4.1h 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 Shiroishi, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September23°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
September164mm average rain
September is one of Shiroishi's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to April and November to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September4.1 hours average sun
September is below Shiroishi's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsApril to May
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September23°C average sea
September is one of Shiroishi'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
September43 weather score
September sits close to Shiroishi's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
Hotels near Shiroishi, Japan
Marriott
The Westin SendaiSendai, Miyagi, Japan
Fairfield by Marriott Tochigi NikkoTochigi, Tochigi, Japan
Fairfield by Marriott Tochigi UtsunomiyaTochigi, Tochigi, Japan
Fairfield by Marriott Tochigi MotegiTochigi, Tochigi, Japan
The Ritz-Carlton, NikkoNikko, Tochigi, Japan
Four Points Flex by Sheraton UtsunomiyaUtsunomiya, Tochigi, Japan