Cool
Average highs are around 5°C, so pack for cooler days.
January verdict
Poor for holiday weather
Average highs are around 5°C, so pack for cooler days. Sunshine averages 1.9h per day, so this is not one of the brighter months. Rainfall averages 188mm, so showers are a real planning factor.
Monthly averages
Temp
5°C
Rain
188mm
Sun
1.9h
Sea
12°C
Weather score
7
Poor
Cool
Average highs are around 5°C, so pack for cooler days.
Wet
Rainfall averages 188mm, so showers are a real planning factor.
Limited sun
Sunshine averages 1.9h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 12°C, so the water can feel cool.
Map
Compare Niigata, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
January5°C average high
January has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
January188mm average rain
January is wetter than Niigata's yearly average, so flexible plans matter more.
Driest monthsFebruary to June and August
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
January1.9 hours average sun
January is one of Niigata's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsApril to May and August
This stretch has the strongest sunshine in the monthly averages.
January12°C average sea
January is below Niigata's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to September
Sea temperatures are usually near 23°C in this stretch, so swimming comfort is at its strongest.
January7 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 monthsJune to September
These months have the strongest weather score in the monthly averages.
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