Weather in Nagasaki, Japan for the month
The full August calendar: model forecast through August 27, then the long-term climate normal.
🔮 What August will be like
📅 August calendar2-week forecast →
🌅 August astronomy
🌊 Water in August
📒 Weather diary in Nagasaki
Ready-made observation table for August: past days are already filled in with weather-station data — for school and beyond. Open the diary →
✉️ Weather forecast by email
Get the forecast for this city by email — every day at 17:00 Moscow time.
FAQ about weather in Nagasaki ❓
What will the weather be like in August in Nagasaki?
The forecast part of August is 2° above normal: +31°…+36° by day, no prolonged rain. The second half is shown from the climate normal: on average +31° by day and +25° at night.
When are the best days of August?
The forecast points to 25–26 August: +36°. Models don’t see beyond two weeks — check back, the page updates daily.
How accurate is a monthly forecast?
Honestly: models are reliable up to ~14 days. So through August 27 we show the model forecast, and beyond that — each day’s climate normal from long-term observations (ERA5). It is a statistical expectation, not a guarantee.
Weather in Nagasaki — in detail
Weather forecast in Nagasaki for the month: from +26° to +36° day and night. Warmest day — Wednesday, August 26 (up to +36°). Coolest — Tuesday, August 18 (+26°). No significant precipitation. Trend: with no sharp changes. See also the forecast for 2 weeks and the weather archive.
To quickly check the weather in Nagasaki anytime, add the city to favorites — and get a daily forecast by email at 17:00 (Moscow time). Note: the forecast may be refined as new data arrives. Data: OpenWeather, Open-Meteo, met.no.