Today's Weather Forecast - Sendai

Today's weather in Sendai. high 20°C (68°F), low 18°C (64°F). Mainly Clear.

Today’s Hourly Weather Outlook

Morning6 AM – Noon18°
Wind speed
4 km/h
Rain probability
92%
AfternoonNoon – 6 PM19°
Wind speed
3 km/h
Rain probability
100%
Evening6 PM – Midn19°
Wind speed
3 km/h
Rain probability
0%
NightMidn – 6 AM19°
Wind speed
3 km/h
Rain probability
0%

24-Hour Rain & Temperature Forecast

Sunrise & Sunset

Sunrise
Dawn 4:44 AM
Total Daylight
Day completeSolar noon 11:32 AM
Sunset
Dusk 6:21 PM
RemainingDaylight ended
Solar elevation-47°
vs yesterday-4 min

Air Quality Index & Health Advice

Air Quality Index

Air quality level
Good
Dominant pollutant
Dominant: PM2.5
Monitoring station
Sendai (仙台)
PM2.5
34μg/m³
PM10
11μg/m³
O₃
2.4ppb
NO₂
9.3ppb
SO₂
1.5ppb
CO
4.5ppm
0Good → Hazardous300+

5-Day Weather Forecast

Full 15-Day Forecast

Weather Insight

Sendai is forecast to reach a high of 20°C today, with an overnight low around 18°C. That's 4° below the long-term average high of 24°C for this time of year. It continues a recent pattern — 8 of the last 28 days with published data have run cooler than normal. Expect a high chance of rain (100% probability) and light winds averaging 4 km/h. Air quality is currently Moderate (AQI 84), driven mainly by PM2.5 at 28 μg/m³.

Today vs Normal

20°C-4° below normal

The long-term average high for today is 24°C.

8 of the last 28 days with published data ran above normal.

It continues that pattern - today's forecast is also running below normal.

2026-08-28: 26°C26°2026-08-29: 21°C21°2026-08-30: 19°C19°2026-08-31: 21°C21°2026-09-01: 21°C21°2026-09-02: 28°C28°2026-09-03: 22°C22°2026-09-04: 24°C24°2026-09-05: 25°C25°2026-09-06: 21°C21°2026-09-07: 20°C20°2026-09-08: 26°C26°

Red = above normal, blue = at or below · last 12 days

Air Quality

Air Quality
Moderate

Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.