worldweather25°Ccooler than usual
usually 26°C–29°C
cooler than 89% of similar days
night: warmer than usual
rain: typical rainfall
wind: stronger than usual
Weather in Japan - today, tomorrow and 14-day forecast
Right now temperatures across Japan range from 19° to 30°. Below: today's conditions city by city, a live weather map, the 14-day outlook and month-by-month climate to help you pick the best time to travel.
Country values are the median of forecasts from 10 cities; the range shows local differences. Methodology.
Weather in Japan's cities today
🌧️Nagoya
30°💧 4.4 mm
🌧️Fukuoka
29°💧 0.1 mm
🌧️Kyoto
28°💧 0.1 mm
🌧️Hiroshima
28°💧 0.1 mm
🌧️Osaka
27°💧 0.2 mm
🌧️Takayama
23°💧 0.4 mm
🌧️Shizuoka
23°💧 36.7 mm
🌧️Yokohama
22°💧 35.7 mm
🌧️Tokyo
21°💧 29.1 mm
🌧️Nikkō
19°💧 27.4 mm
Weather map - today's temperatures
Next days in Japan
today🌧️
25°💧 2.4 mm
Sun🌧️
26°💧 13.3 mm
Mon🌧️
23°💧 29.9 mm
Tue🌧️
27°💧 2.5 mm
Wed🌧️
24°💧 26 mm
Thu🌧️
21°💧 44.4 mm
Fri🌧️
22°💧 5.7 mm
Sat🌧️
26°💧 0.7 mm
Forecast vs 1991-2020 climate normal
NASA POWERHow does the current forecast compare with normal?
We compare the coming days with weather usually observed at this time of year.
Thursday 10 Sept in Japan, the forecast high is 21°C. Typical daytime temperatures at this time of year range from 25°C to 29°C, so it will be exceptionally cool. It is cooler than 98% of similar days.
26°Ccooler than usual
usually 26°C–29°C
cooler than 83% of similar days
night: near normal
rain: more rain than usual
wind: stronger than usual
23°Cexceptionally cool
usually 26°C–29°C
cooler than 97% of similar days
night: exceptionally warm
rain: exceptionally wet
wind: exceptionally strong
27°Cnear normal
usually 25°C–29°C
night: exceptionally warm
rain: typical rainfall
wind: lighter than usual
24°Cexceptionally cool
usually 25°C–29°C
cooler than 94% of similar days
night: warmer than usual
rain: exceptionally wet
wind: typical
21°Cexceptionally cool
usually 25°C–29°C
cooler than 98% of similar days
night: near normal
rain: exceptionally wet
wind: typical
22°Cexceptionally cool
usually 25°C–29°C
cooler than 97% of similar days
night: warmer than usual
rain: more rain than usual
wind: typical
How warm was this week in previous years?
Each bar shows the average daily high during the same 7-day period in each year.
cooler yearstypical rangewarmer years2026 forecastcurrent forecast
From 1981 to 2025, the 5-11 Sept period averaged 28°C by day. The coolest year was 1981 (24°C) and the warmest was 2024 (31°C). The current forecast averages 24°C - lower than in 98% of historical years.
Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.
14-day forecast - Japan
Japan 30 & 45-day weather - long-range outlook
Next 16 days · forecast
25°
around 23° at night · days with rain: 14
Weeks 3-4 · avg for September
27°
around 21° at night · rain chance 54%
Weeks 5-7 · avg for October
22°
around 16° at night · rain chance 43%
The 30 & 45-day outlook for Japan: the next 16 days are a numerical forecast updated daily - on average 25° by day and 23° at night. Further out we rely on multi-year climate averages: around 27° in September, and about 22° in October. Forecasts beyond two weeks are indicative only.
Today vs the next days - Japan cities
| City | Today | +3 days | +7 days | Rain today |
|---|---|---|---|---|
| 🌧️ Nagoya | 30℃ | 29℃ | 29℃ | 4.4 mm |
| 🌧️ Fukuoka | 29℃ | 30℃ | 26℃ | 0.1 mm |
| 🌧️ Kyoto | 28℃ | 29℃ | 29℃ | 0.1 mm |
| 🌧️ Hiroshima | 28℃ | 31℃ | 24℃ | 0.1 mm |
| 🌧️ Osaka | 27℃ | 30℃ | 27℃ | 0.2 mm |
| 🌧️ Takayama | 23℃ | 26℃ | 27℃ | 0.4 mm |
| 🌧️ Shizuoka | 23℃ | 25℃ | 26℃ | 36.7 mm |
| 🌧️ Yokohama | 22℃ | 24℃ | 22℃ | 35.7 mm |
| 🌧️ Tokyo | 21℃ | 23℃ | 22℃ | 29.1 mm |
| 🌧️ Nikkō | 19℃ | 22℃ | 20℃ | 27.4 mm |
Day-by-day forecast for Japan
Saturday5 September 2026
🌧️25°light rain
Sunday6 September 2026
🌧️26°moderate rain
Monday7 September 2026
🌧️23°very heavy rain
Tuesday8 September 2026
🌧️27°light rain
Wednesday9 September 2026
🌧️24°heavy rain
Thursday10 September 2026
🌧️21°heavy rain
Friday11 September 2026
🌧️22°moderate rain
Saturday12 September 2026
🌧️26°light rain
Sunday13 September 2026
☀️27°clear sky
Monday14 September 2026
🌧️29°light rain
Tuesday15 September 2026
🌧️28°moderate rain
Wednesday16 September 2026
🌧️24°moderate rain
Thursday17 September 2026
🌧️26°light rain
Friday18 September 2026
☀️27°clear sky
Saturday19 September 2026
🌧️26°light rain
Sunday20 September 2026
🌧️26°light rain
Sea temperature - Japan
| Beach | Water today | Water week avg | Waves | How's the water? |
|---|---|---|---|---|
| Osaka | 29℃ | 29℃ | 0.2 m | very warm |
| Nagoya | 29℃ | 29℃ | 0.1 m | very warm |
| Fukuoka | 29℃ | 27℃ | 1.6 m | very warm |
| Hiroshima | 28℃ | 28℃ | 0.3 m | very warm |
| Shizuoka | 28℃ | 27℃ | 1 m | very warm |
| Tokyo | 27℃ | 26℃ | 0.2 m | very warm |
| Yokohama | 27℃ | 26℃ | 0.3 m | warm |
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.
Air quality and smog in Japan
| City | PM2.5 (µg/m³) | PM10 (µg/m³) | Air quality |
|---|---|---|---|
| Yokohama | 13.9 | 15 | good |
| Nagoya | 10.3 | 10.7 | very good |
| Chiba | 8.9 | 9.8 | very good |
| Osaka City | 8.8 | 9.8 | very good |
| Kōbe Shi | 7.8 | 10.1 | very good |
| Saitama-shi | 7.3 | 8.6 | very good |
| Okayama Shi | 7.3 | 10.6 | very good |
| Hiroshima City | 6.5 | 9.6 | very good |
| Sagamihara-shi | 5.9 | 6.6 | very good |
| Kitakyushu City | 5.8 | 8.8 | very good |
| Kioto | 5.5 | 7.5 | very good |
| Fukuoka City | 5.5 | 7.9 | very good |
| Sendai | 5.4 | 7.6 | very good |
| Kumamoto Shi | 5 | 6.7 | very good |
Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-09-05, 10:00).
Japan weather through the year
Japan weather month by month - when is the best time to go?
Weather in other countries in Asia
Public holidays in Japan - when are the long weekends?
Next long weekend in Japan: Respect for the Aged Day (21 September, Monday) - Saturday–Monday (3 days off).
2026
21 SeptemberMonday
Respect for the Aged Day
long weekend22 SeptemberTuesday
Citizen's Holiday
long weekend + bridge day23 SeptemberWednesday
Autumnal Equinox Day
12 OctoberMonday
Sports Day
long weekend3 NovemberTuesday
Culture Day
long weekend + bridge day23 NovemberMonday
Labor Thanksgiving Day
long weekend2027
1 JanuaryFriday
New Year's Day
long weekend11 JanuaryMonday
Coming of Age Day
long weekend11 FebruaryThursday
National Foundation Day
long weekend + bridge day23 FebruaryTuesday
Emperor's Birthday
long weekend + bridge day21 MarchSunday
Vernal Equinox Day
falls on a weekend22 MarchMonday
Substitute Holiday
long weekendPublic holidays (statutory days off) - shops, offices and some attractions may be closed. A "bridge day" is a workday between a holiday and the weekend worth taking as leave. Lunar holiday dates marked as tentative may shift by one day after the official announcement.
Calendar sources · Verified on .
FAQ - Japan weather
What is the weather like in Japan today?
Today it is about 25° during the day and 22° at night, light rain.
How far ahead can I check the forecast for Japan?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.