Climate & Weather in Japan
Japan's climate varies significantly from north (Hokkaido) to south (Okinawa), but most expats live in the central region (Tokyo, Osaka, Kyoto) which has four distinct seasons.
Seasonal Overview
Spring (March-May):
- Cherry blossoms (late March-April)
- Mild temperatures: 10-20°C (50-68°F)
- Popular travel season
- Hay fever (kafunsho) affects many
Summer (June-August):
- Rainy season (tsuyu): June to mid-July
- Hot and very humid: 25-35°C (77-95°F)
- Typhoon season begins
- "Cool biz" dress codes in offices
Autumn (September-November):
- Fall foliage (November)
- Comfortable: 15-25°C (59-77°F)
- Typhoon season ends (October)
- Clear skies, popular for travel
Winter (December-February):
- Cold but sunny: 2-10°C (36-50°F) in Tokyo
- Colder in northern regions
- Dry air
- Skiing season in mountains
Regional Differences
| Region | Summer | Winter |
|---|---|---|
| Hokkaido | Mild (20-25°C) | Very cold (-10 to 0°C), heavy snow |
| Tokyo/Osaka | Hot, humid (30-35°C) | Mild (2-10°C), minimal snow |
| Kyushu | Hot, humid (30-35°C) | Mild (5-12°C) |
| Okinawa | Hot (28-32°C) | Mild (15-20°C), subtropical |
Dealing with Summer
Summer in Japan is challenging:
- High humidity (70-80%) makes it feel hotter
- Air conditioning is essential (and everywhere)
- Hydration is critical
- Lightweight, moisture-wicking clothes recommended
- UV protection important
Rainy Season (Tsuyu)
- Usually June to mid-July
- Continuous rain, high humidity
- Can feel oppressive
- Good umbrella essential
- Mold prevention important at home
Typhoon Season
- July to October (peak: August-September)
- Well-forecast 5-7 days ahead
- Trains may stop during severe storms
- Most buildings can withstand them
- Check JMA (Japan Meteorological Agency) for updates
What to Pack
Year-round:
- Umbrella (compact, always carried)
- Layers for air conditioning
Summer:
- Light, breathable fabrics
- Hat and sunscreen
- Portable fan (common in Japan)
Winter:
- Warm coat for outdoors
- Indoor heating is less central than Western countries
Pro Tips
- •Summer humidity is the real challenge - air conditioning is essential
- •Carry a compact umbrella everywhere, even when sunny
- •Cherry blossom season (late March-early April) is beautiful but crowded
- •Hay fever (kafunsho) affects millions in spring - bring medication if needed
- •Typhoons are well-forecast - check JMA for updates during season
Have questions about climate & weather in Japan?