Weather in Jepang in September
Country-wide climate normals across 64 cities in Jepang.
How Hot Is Jepang in September?
Uniform warmth covers Jepang in September: highs near 27°C across all cities.
Sunshine in Jepang in September
Limited sunshine and short daylight define Jepang's September: Tokyo averages just 2.5h of direct sun, with the sun up between 5:25 am and 5:45 pm. The grey, overcast pattern is consistent across most of the country, with little regional variation in cloud cover.
Does It Rain In Jepang In September?
Heavy seasonal rains saturate Jepang in September — Tokyo averages 242mm of rain across 15 days, with downpours an almost daily feature. The pattern is consistent across most regions, particularly along monsoon-affected coasts. Expect torrential afternoon storms followed by humid heat.
Is Jepang Humid In September?
Mugginess defines Jepang's September: humidity averages 75% in Tokyo, and the air feels noticeably heavy across most regions. Sweat sits on the skin longer than it would in drier conditions, and overnight relief is limited. Pack light, breathable fabrics.
Wind In Jepang In September
Light breezes are typical across Jepang in September: 16 kph in Tokyo, with similar gentle wind conditions in most regions. The air moves enough to keep things fresh on warm days but not enough to be disruptive. Coastal cities may see slightly more.
Cloud Cover In Jepang In September
Cloudy skies dominate Jepang in September — 69% cover in Tokyo, with similar overcast conditions in most regions. Direct sun is patchy and broken; expect grey stretches between brief bright moments. Coastal areas may be heavier than inland.