Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
Weather Guide
Dewa Sanzan, Japan Average Monthly Weather
Weather score31Poor annual avg
Best months: August, July, September
Across the year, average daytime temperatures are around 14°C, sunshine averages 4.5h per day, and rainfall totals about 1574mm. Sea temperatures average 17°C across the year.
Annual weather
Annual averages
Temp
14°C
Rain
1574mm
Annual total
Sun
4.5h
Sea
17°C
Weather score
31
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 180mm, so some wet days are possible.
Some sun
Sunshine averages 6h per day, enough for a balanced month.
Swimmable
Sea temperatures average 26°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Dewa Sanzan, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August28°C average high
August is one of Dewa Sanzan'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
August180mm average rain
August is one of Dewa Sanzan's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to May
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August6 hours average sun
August is brighter than Dewa Sanzan's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsApril to May and August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
August26°C average sea
August is one of Dewa Sanzan's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 23°C in this stretch, so swimming comfort is at its strongest.
Weather score
August65 weather score
August is one of Dewa Sanzan'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.
Hotels near Dewa Sanzan, Japan
Marriott
The Westin SendaiSendai, Miyagi, Japan
Four Points Flex by Sheraton MoriokaMorioka, Iwate, Japan
Fairfield by Marriott Tochigi NikkoTochigi, Tochigi, Japan
The Ritz-Carlton, NikkoNikko, Tochigi, Japan
Fairfield by Marriott Tochigi UtsunomiyaTochigi, Tochigi, Japan
Four Points Flex by Sheraton UtsunomiyaUtsunomiya, Tochigi, Japan