Sendai weather in September
Temperature, rain and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: May – June, August – October
What is the weather like in Sendai in September?
In September, Sendai is warm: daytime highs average 24 °C, and nights cool down to about 18 °C. Expect around 4 hours of sunshine a day. It rains often – on about 15 days, adding up to 169 mm. The air is often humid and muggy. All in all, September is a good month for a holiday in Sendai.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 61 | 62 | 70 |
| Day | 27° | 24° | 18° |
| Night | 21° | 18° | 12° |
| Sun | 5 h | 4 h | 5 h |
| Rain days | 15 | 15 | 11 |
More details for September
- Daylight
- 12 h 30 min05:17 – 17:47
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 16 daysdew point 18 °C or moreAll months
- Wind
- 18 km/haverage daily peakAll months
- Cloud cover
- 70 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC+9Asia/Tokyo
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %22 %
- Few rainy daysweight 30 %25 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Sunscreen
- Sunglasses & sun hat
- Insect repellent
- Rain jacket or umbrella
Sendai in September: quick answers
Is Sendai hot in September?
Warm rather than hot: in September, daytime highs in Sendai average 24 °C and nights cool to about 18 °C.
Does it rain much in Sendai in September?
It rains often – on about 15 days, adding up to 169 mm.
Sendai month by month
The whole year in SendaiAll destinations: JapanWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences