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Koenji

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Koenji Weather, Climate and Best Time to Visit

Data source:Meteostat
Update date:2025-09

Koenji year round climate

  • Spring (March–May): Average 11.1–19.3°C, mild and comfortable, but with relatively high rainfall; check the weather forecast. Common activities: enjoying nature, viewing flowers (such as cherry blossoms and other spring flowers), visiting museums. Recommended clothing: light jacket, long-sleeved shirt, comfortable walking shoes.
  • Summer (June–August): Average 23.1–28.6°C, hot and humid, with relatively high rainfall and occasional typhoons. Common activities: relaxing by the river, indoor activities (such as shopping, watching movies), enjoying shaved ice and other summer treats. Recommended clothing: light and breathable clothing, hat, sunscreen.
  • Autumn (September–November): Average 14.2–25.9°C, pleasant and cool, with decreasing rainfall. Common activities: viewing autumn leaves, outdoor excursions, participating in local festivals. Recommended clothing: light jacket, long-sleeved shirt or sweater.
  • Winter (December–February): Average 5.9–8.3°C, cold and dry, with the least rainfall. Common activities: enjoying hot springs, indoor activities, visiting art museums, etc. Recommended clothing: warm coat, sweater, scarf, gloves, hat.

Koenji climatological average

Annual average temperature: approx. 17°C / Annual rainfall: approx. 1648 mm / Summer humidity: 70%–80% / Rainiest month: June

Koenji monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
5.9°C
25
February
6.8°C
63.7
March
11.1°C
148.3
April
16.2°C
143.7
May
19.3°C
186.3
June
23.1°C
253.7
July
28.3°C
156.7
August
28.6°C
206.3
September
25.9°C
217
October
18.9°C
146.7
November
14.2°C
75.7
December
8.3°C
25.8

Koenji weather for the next seven days

4/27
Monday
Heavy rain
16.6°C/14.4°C
4/28
Tuesday
Partly Cloudy
22°C/14.9°C
4/29
Wednesday
Moderate rain
21.2°C/13.8°C
4/30
Thursday
Patchy rain nearby
16.8°C/13°C
5/1
Friday
Moderate rain
13.7°C/12.5°C
5/2
Saturday
Sunny
20.9°C/13.5°C
5/3
Sunday
Cloudy
24.4°C/17.4°C