When to go · Sai
Sai in May
Good month. Outside the best window (Jun–Sep (sea‑urchin roe festival, milder weather)). Across Japan: After Golden Week, one of the best months: warm, green, calmer.
Key facts
- Verdict
- Good
- Temperature
- 19°C (66°F)66°F (19°C) / 10°C (50°F)50°F (10°C)
- average high / low
- Rain days
- 5
- Crowds
- Medium
- Japan overall
- Prices
- Medium
- Japan overall
Verdict
Outside the best window (Jun–Sep (sea‑urchin roe festival, milder weather)). Across Japan: After Golden Week, one of the best months: warm, green, calmer.
Is another month better than May?
May is rated good. These months rate higher:
- JuneGreatInside Sai's best window: Jun–Sep (sea‑urchin roe festival, milder weather).
- JulyGreatInside Sai's best window: Jun–Sep (sea‑urchin roe festival, milder weather).
- AugustGreatInside Sai's best window: Jun–Sep (sea‑urchin roe festival, milder weather).
- SeptemberGreatInside Sai's best window: Jun–Sep (sea‑urchin roe festival, milder weather).
Weather in May
- SaiHighs around 19 °C (66 °F), lows around 10 °C (50 °F), rain on about 5 daysHighs around 66 °F (19 °C), lows around 50 °F (10 °C), rain on about 5 days
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Golden Week big impact
29 Apr – 5 May · Japan
The biggest domestic travel week: Shinkansen reserved cars and hotels sell out; prices up.
Crowds and prices
- Crowds · Japan overall
- Medium
- Prices · Japan overall
- Medium
Japan overall: After Golden Week, one of the best months: warm, green, calmer.
Compare two months
Weather, crowds and prices for any two months in Sai, side by side.
Verdict
May: Good
Jun: Great (better)
Daytime high
May: 19 °C (66 °F)66 °F (19 °C)
Jun: 23 °C (73 °F)73 °F (23 °C)
Night low
May: 10 °C (50 °F)50 °F (10 °C)
Jun: 14 °C (57 °F)57 °F (14 °C)
Rain days
May: 5
Jun: 4 (better)
Crowds
May: Medium
Jun: Low
Prices
May: Medium
Jun: Medium
Festivals listed
May: 1
Jun: 0
May: Outside the best window (Jun–Sep (sea‑urchin roe festival, milder weather)). Across Japan: After Golden Week, one of the best months: warm, green, calmer.
June: Inside Sai's best window: Jun–Sep (sea‑urchin roe festival, milder weather).
Sai: figures are long-term averages from this guide, not a forecast.
What to pack
- A warm layer for the evenings