Live Weather & Forecast
Weather in Koshigaya
Saitama, Japan · Real-time conditions & 3-day outlook
18°C
Feels like 18°C
65°F / Feels 65°F
Light rain
Koshigaya, Saitama
🌙 Nighttime
Updated: 2026-04-15 20:00
Humidity
88%
Wind
6.5 km/h ESE
Wind Gust
8.5 km/h
Pressure
1009 mb
Visibility
10 km
UV Index
0
(Low)
Precipitation
0.16 mm
Cloud Cover
75%
Dew Point
12.8°C
Wind Degree
115°
Air Quality Index
US EPA: Good
UK DEFRA: Low (2)
CO
213.9 μg/m³
NO₂
17.6 μg/m³
O₃
110 μg/m³
SO₂
11.5 μg/m³
PM 2.5
12.8 μg/m³
PM 10
16.7 μg/m³
Today's Hourly Forecast
24-hour breakdown for Koshigaya, Saitama
12 AM
18°
Partly Cloudy
1 AM
18°
Partly Cloudy
2 AM
17°
Partly Cloudy
3 AM
17°
Partly Cloudy
4 AM
17°
Patchy rain nearby
5 AM
16°
Patchy rain nearby
6 AM
16°
Patchy rain nearby
7 AM
17°
Patchy rain nearby
8 AM
18°
Patchy rain nearby
9 AM
19°
Patchy rain nearby
10 AM
19°
Patchy rain nearby
11 AM
20°
Cloudy
12 PM
20°
Partly Cloudy
1 PM
20°
Cloudy
2 PM
20°
Overcast
3 PM
20°
Patchy rain nearby
4 PM
20°
Patchy rain nearby
5 PM
19°
Patchy rain nearby
6 PM
18°
Patchy rain nearby
7 PM
18°
Patchy rain nearby
8 PM
18°
Light rain
9 PM
18°
Light drizzle
10 PM
17°
Light drizzle
11 PM
17°
Light drizzle
3-Day Forecast
Daily overview for Koshigaya, Saitama
Today
Patchy rain nearby
20°
/
16°
🌧️ 96% chance of rain
💧 Avg. humidity: 66%
💨 Max wind: 11.5 km/h
🌧️ Total precip: 1.96 mm
☀️ UV Index: 1.4
🌅 Sunrise: 05:09 AM
🌇 Sunset: 06:14 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Thu, Apr 16
Patchy rain nearby
23°
/
12°
🌧️ 95% chance of rain
💧 Avg. humidity: 58%
💨 Max wind: 27.4 km/h
🌧️ Total precip: 4.41 mm
☀️ UV Index: 1.4
🌅 Sunrise: 05:07 AM
🌇 Sunset: 06:15 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Fri, Apr 17
Partly Cloudy
20°
/
10°
🌧️ 0% chance of rain
💧 Avg. humidity: 42%
💨 Max wind: 18 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2
🌅 Sunrise: 05:06 AM
🌇 Sunset: 06:15 PM
🌙 New Moon
🌑 Moon: 0% lit
Best Time to Visit Koshigaya
Plan your trip to Koshigaya, Japan around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Koshigaya?
Current conditions in Koshigaya: Light rain, temperature 18°C, humidity 88%.
What is the best time to visit Koshigaya?
The best time to visit Koshigaya is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Koshigaya?
Koshigaya is located at approximately 35.9° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Koshigaya?
The wettest period in Koshigaya is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Koshigaya?
For visits to Koshigaya during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What are the public holidays in Koshigaya in 2026?
View the 2026 public holidays for Koshigaya on our Holidays page.
What are the GPS coordinates used for the weather forecast in Koshigaya?
The weather forecast for Koshigaya uses coordinates 35.8904, 139.7909.