See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
21°
Light Rain and Humid
Feels Like: 21°
Min: 20°
Max: 23°
The next few hours will be drizzle, with today reaching 23°C and dropping to 19°C. The coming days will be drizzle
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
05:29
Sunrise
17:40
Sunset
Moon
Waxing Crescent
10:27
Moonrise
20:15
Moonset
Daily Forecast
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
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Humidity
Weather in Koshigaya today, September 16, 2026
Koshigaya looks damp on September 16, 2026, so plan for wet spells during the day. Early travel and outdoor time should assume rain can arrive quickly. The morning carries the wetter risk, with rain chances near 100% and the highest odds around 10:00. Cloud is also thick early on, peaking near 100% around 04:00.
The day peaks near 23°C and cools toward 20°C. Expect humidity between 85% and 95%, most humid near 04:00. A lighter breeze peaks around 15:00 near 3.3 km/h.
Afternoon showers stay in play, peaking near 100% around 12:00. Skies remain cluttered, with cover about 100% by 12:00. Horizontal visibility sits around 12.1 km, briefly nearer 5.5 km. The sun rises at 05:29 and sets at 17:40, for a total of 12 hours 10 minutes of sunlight today.
The practical takeaway for Koshigaya on September 16, 2026 is simple: plan for rain, keep layers handy, and work around a high of about 23°C.
Frequently asked questions about weather in Koshigaya
How warm does it get in Koshigaya?
The warmest month in Koshigaya is August, with average high temperatures of 33°C. The average temperature during this period is around 29°C.
How cold does it get in Koshigaya?
The coldest month in Koshigaya is January, with average low temperatures of 0°C. The average temperature during this period is around 5°C.
What is the wettest time of year in Koshigaya?
The wettest month in Koshigaya is October, with an average of 177mm of precipitation.
What is the driest time of year in Koshigaya?
The driest month in Koshigaya is December, with an average of 41mm of precipitation.
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