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.
Koshigaya climatological average
Annual average temperature: approx. 16°C / Annual rainfall: approx. 1576 mm / Summer humidity: 70%–80% / Rainiest month: June
Koshigaya monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (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
Koshigaya weather for the next seven days
12/22
Monday
Patchy rain nearby
11.2°C/6.4°C
12/23
Tuesday
Sunny
10.1°C/5°C
12/24
Wednesday
Moderate rain
8°C/6.7°C
12/25
Thursday
Patchy rain nearby
10.5°C/9.1°C
12/26
Friday
Patchy rain nearby
10.4°C/4.1°C
12/27
Saturday
Partly Cloudy
7.7°C/4.1°C
12/28
Sunday
Partly Cloudy
8.1°C/4.2°C
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