Sendai in September
In September, Sendai averages 24°C (76°F) during the day and 18°C (64°F) at night, with frequent rain — about 15 days of the month see precipitation (177 mm total).
High seasonConditions are comfortable for sightseeing without being sweltering. Plan for unsettled weather and bring rain gear.
September offers comfortable temperatures in Sendai, with some rain to plan around.
How September compares to the rest of the year in Sendai
September is one of the warmest months in Sendai (3rd of 12) and moderately rainy compared to the rest of the year (4th of 12). Daytime temperature runs 8°C above the annual average (17°C). September runs 4°C cooler than August (28°C) and cools 6°C in October (19°C).
September sunrise & sunset in Sendai
Times shown for Sendai local time (Asia/Tokyo), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Sendai — September
Golden-hour and blue-hour windows for the 15th of September, in Sendai's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Sendai in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (High season) and Sendai's popularity.
Crowds & pricing — September in Sendai
This is a busy month in Sendai — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — September in Sendai
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Sendai in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 5°C / 40°F | -2°C / 28°F | 64 mm | 12 | — |
| February | 6°C / 43°F | -2°C / 28°F | 61 mm | 10 | — |
| March | 11°C / 51°F | 1°C / 34°F | 100 mm | 10 | — |
| April | 15°C / 60°F | 5°C / 42°F | 104 mm | 10 | — |
| May | 21°C / 69°F | 11°C / 52°F | 100 mm | 11 | — |
| June | 23°C / 74°F | 16°C / 61°F | 146 mm | 16 | — |
| July | 27°C / 80°F | 21°C / 69°F | 197 mm | 19 | — |
| August | 28°C / 82°F | 22°C / 71°F | 185 mm | 19 | — |
| September | 24°C / 76°F | 18°C / 64°F | 177 mm | 15 | — |
| October | 19°C / 65°F | 11°C / 51°F | 150 mm | 11 | — |
| November | 14°C / 56°F | 5°C / 41°F | 64 mm | 10 | — |
| December | 7°C / 45°F | 0°C / 32°F | 68 mm | 13 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Sendai in September →
Frequently asked questions
How hot is Sendai in September?
In September, Sendai averages a high of 24°C (76°F) and a low of 18°C (64°F) — generally warm.
Does it rain a lot in Sendai in September?
September is quite rainy in Sendai, with about 15 rainy days on average.
Is September a good time to visit Sendai?
September is warm but on the rainy side. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Sendai in September?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full September packing list for Sendai for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.