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Koshigaya

Travel guide

Top 10 things to do in Koshigaya

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Best time to visit Koshigaya

Data source：Meteostat
Last updated：2025-09

Weather in Koshigaya throughout the year

  • Spring (March–May): Average 9.9–18.4°C, mild climate but with relatively high rainfall, especially in April. Common activities: Flower viewing, hiking. Recommended clothing: Light jacket, long-sleeved shirt, rain gear.
  • Summer (June–August): Average 22.2–28.3°C, hot and humid, with relatively high rainfall from June to August. Heatstroke prevention is necessary. Common activities: Swimming, outdoor activities (sun protection and rain gear needed). Recommended clothing: Light and breathable clothing, sun hat, rain gear.
  • Autumn (September–November): Average 18.2–13.4°C, pleasant and comfortable climate with gradually decreasing rainfall. Common activities: Maple viewing, outings. Recommended clothing: Light jacket, long-sleeved shirt.
  • Winter (December–February): Average 7.5–5.3°C, cold and dry with low rainfall. Common activities: Indoor activities, hot springs. Recommended clothing: Warm jacket, sweater, scarf, hat.

Weather in Koshigaya

Annual average temperature: approx. 16°C / Annual rainfall: approx. 1576 mm / Summer humidity: 70%–80% / Rainiest month: June

Koshigaya weather by month

Month
Temperature (°C)
Rainfall (mm)
January
4.4°C
34.1
February
5.3°C
68.6
March
9.9°C
134.3
April
15.1°C
157.5
May
18.4°C
191.9
June
22.2°C
238.6
July
27.4°C
116.6
August
28.3°C
196.6
September
25.6°C
182.6
October
18.2°C
136.4
November
13.4°C
90.2
December
7.5°C
29.2

7-day weather forecast for Koshigaya

10/29
Thursday
Overcast
16.1°C/10.8°C
10/30
Friday
Overcast
21.2°C/13°C
10/31
Saturday
Sunny
23.6°C/12.7°C
11/1
Sunday
Cloudy
20°C/11.9°C
11/2
Monday
Overcast
20.5°C/13.4°C
11/3
Tuesday
Sunny
20.4°C/12.5°C
11/4
Wednesday
Light drizzle
14.8°C/12.8°C

Koshigaya travel FAQs and useful info

Is Koshigaya a good place to live?

Koshigaya City offers high convenience with numerous large commercial facilities. However, potential residents should be aware of possible chronic traffic congestion and congestion around stations. It's also advisable to check hazard maps for disaster preparedness before moving.

What are the must-see attractions in Koshigaya?

Discover AEON Lake Town for a premier shopping experience, visit Hisaizu Shrine for spiritual reflection, and explore the serene Hanataen Garden. For outdoor fun, Shirakobato Water Park is a great option, and Campbelltown Forest of Wild Birds offers a natural escape.

What is the history of Koshigaya?

Koshigaya was formed as Koshigaya Town in 1954 through the merger of two towns and eight villages. It officially became a municipality in 1958. The connection of the Tokyo Metro Hibiya Line to the Tobu Skytree Line in 1962 significantly boosted its population growth.

What is the population of Koshigaya?

As of January 1, 2021, Koshigaya City had an estimated population of 345,353 residents residing in 158,022 households, resulting in a population density of approximately 5700 persons per square kilometer.

What kind of commercial facilities can be found in Koshigaya?

Koshigaya is known for its abundance of large commercial facilities, with AEON Lake Town being a prominent example, offering extensive shopping and entertainment options for visitors and residents alike.