Sendai weather in October
In October, Sendai sees average daytime highs of 24°C and overnight lows near 20°C, with 109 mm of rain across 8.7 wet days and about 11.2 hours of daylight. It is the 5th-warmest and 10th-wettest month of the year here.
Highs ease over the month, from about 26°C in the first days to 21°C by the end. The sky is clear or mostly clear about 47% of the time in October, and the air most often feels humid.
Daylight stretches from about 11 h 42 min at the start of October to 10 h 48 min by month's end. Set against the rest of the year, October is Sendai's 1st-clearest and 7th-windiest month. For the whole year in context, see Sendai's year-round climate.
- Daytime high
- 24°
- 5th warmest
- Overnight low
- 20°
- 8th coldest
- Rainfall
- 109 mm
- 8.7 wet days
- Daylight
- 11 h 12 min
- 6:28 AM – 5:40 PM
- Cloud cover
- 46%
- 1st clearest
- Wind
- 13 km/h
- 7th windiest
- Solar energy
- 3.79 kWh/m²
- Travel score
- 7.2
- out of 10
Sendai is city in Kagoshima prefecture, Japan.
- Density
- 135/km²
- people per km²
- Founded
- 2004
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in October
Highs ease over the month, from about 26°C in the first days to 21°C by the end.
A typical October day in Sendai reaches about 24°C in the afternoon and slips back to 20°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 26°C. Set against its neighbours, October runs about 4°C cooler than September and about 5°C warmer than November.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 |
| Avg low (°C) | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 26 | 22 |
| 2 | 26 | 22 |
| 3 | 26 | 22 |
| 4 | 25 | 22 |
| 5 | 25 | 21 |
| 6 | 25 | 21 |
| 7 | 25 | 21 |
| 8 | 25 | 21 |
| 9 | 25 | 21 |
| 10 | 25 | 21 |
| 11 | 24 | 21 |
| 12 | 24 | 20 |
| 13 | 24 | 20 |
| 14 | 24 | 20 |
| 15 | 24 | 20 |
| 16 | 24 | 20 |
| 17 | 24 | 20 |
| 18 | 23 | 19 |
| 19 | 23 | 19 |
| 20 | 23 | 19 |
| 21 | 23 | 19 |
| 22 | 23 | 19 |
| 23 | 23 | 19 |
| 24 | 22 | 18 |
| 25 | 22 | 18 |
| 26 | 22 | 18 |
| 27 | 22 | 18 |
| 28 | 22 | 18 |
| 29 | 22 | 18 |
| 30 | 21 | 18 |
| 31 | 21 | 17 |
How October really feels in Sendai
Once humidity and wind are folded in, October averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
October sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Sendai weather by month
How October compares with the rest of the year at a glance. October is the 5th-warmest and 10th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 12° / 8° | 98 | 12.3 | 10.2 | 2.8 |
| Feb | 12° / 8° | 113 | 11.2 | 10.8 | 3.1 |
| Mar | 15° / 11° | 161 | 13.4 | 11.8 | 4.2 |
| Apr | 18° / 14° | 186 | 11.7 | 12.8 | 5.6 |
| May | 22° / 18° | 205 | 11.3 | 13.6 | 6.3 |
| Jun | 25° / 22° | 500 | 18.5 | 14 | 5.2 |
| Jul | 29° / 25° | 324 | 17.6 | 13.9 | 4.7 |
| Aug | 30° / 26° | 166 | 15.7 | 13.2 | 4.5 |
| Sep | 28° / 24° | 198 | 13.1 | 12.2 | 5.7 |
| Oct | 24° / 20° | 109 | 8.7 | 11.2 | 7.2 |
| Nov | 19° / 15° | 122 | 9.3 | 10.4 | 6.1 |
| Dec | 14° / 10° | 103 | 10.6 | 10 | 4.0 |
Cloud cover in October
The sky is clear or mostly clear about 47% of the time in October, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 14% of October, with mostly cloudy or overcast conditions the remaining 39%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 54 | 55 | 56 | 56 | 57 | 59 | 59 | 61 | 62 | 62 | 63 | 64 | 64 | 65 | 65 | 66 | 65 | 65 | 65 | 64 | 64 | 63 | 62 | 61 | 61 | 60 | 60 | 59 | 59 | 59 | 57 |
| Cloudier (%) | 46 | 45 | 44 | 44 | 43 | 41 | 41 | 39 | 38 | 38 | 37 | 36 | 36 | 35 | 35 | 34 | 35 | 35 | 35 | 36 | 36 | 37 | 38 | 39 | 39 | 40 | 40 | 41 | 41 | 41 | 43 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 54 | 46 |
| 2 | 55 | 45 |
| 3 | 56 | 44 |
| 4 | 56 | 44 |
| 5 | 57 | 43 |
| 6 | 59 | 41 |
| 7 | 59 | 41 |
| 8 | 61 | 39 |
| 9 | 62 | 38 |
| 10 | 62 | 38 |
| 11 | 63 | 37 |
| 12 | 64 | 36 |
| 13 | 64 | 36 |
| 14 | 65 | 35 |
| 15 | 65 | 35 |
| 16 | 66 | 34 |
| 17 | 65 | 35 |
| 18 | 65 | 35 |
| 19 | 65 | 35 |
| 20 | 64 | 36 |
| 21 | 64 | 36 |
| 22 | 63 | 37 |
| 23 | 62 | 38 |
| 24 | 61 | 39 |
| 25 | 61 | 39 |
| 26 | 60 | 40 |
| 27 | 60 | 40 |
| 28 | 59 | 41 |
| 29 | 59 | 41 |
| 30 | 59 | 41 |
| 31 | 57 | 43 |
Chance of precipitation in October
Sendai gets around 109 mm of rain over 8.7 wet days in October. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 29% and peaks near 35% on the wettest days. The odds ease toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 35 | 35 | 34 | 33 | 33 | 32 | 31 | 31 | 30 | 29 | 29 | 28 | 28 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 |
| Rain chance (%) | |
|---|---|
| 1 | 35 |
| 2 | 35 |
| 3 | 34 |
| 4 | 33 |
| 5 | 33 |
| 6 | 32 |
| 7 | 31 |
| 8 | 31 |
| 9 | 30 |
| 10 | 29 |
| 11 | 29 |
| 12 | 28 |
| 13 | 28 |
| 14 | 27 |
| 15 | 27 |
| 16 | 27 |
| 17 | 26 |
| 18 | 26 |
| 19 | 26 |
| 20 | 26 |
| 21 | 26 |
| 22 | 26 |
| 23 | 26 |
| 24 | 26 |
| 25 | 27 |
| 26 | 27 |
| 27 | 27 |
| 28 | 27 |
| 29 | 27 |
| 30 | 27 |
| 31 | 27 |
Humidity in October
Most of October feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, October lands in the humid band about 30% of days. Sticky, muggy-or-worse air turns up on roughly 27% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 2 | 3 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 13 | 14 | 16 | 17 | 19 | 20 | 22 | 23 | 25 | 27 | 29 | 31 | 32 | 34 | 36 | 38 | 39 | 40 | 42 | 43 |
| Comfortable (%) | 12 | 13 | 14 | 15 | 15 | 16 | 17 | 19 | 20 | 21 | 22 | 23 | 24 | 24 | 25 | 26 | 26 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 |
| Humid (%) | 29 | 30 | 31 | 31 | 32 | 33 | 33 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 33 | 33 | 32 | 32 | 31 | 30 | 29 | 28 | 27 | 27 | 26 | 25 | 24 | 24 | 23 | 22 | 22 |
| Muggy (%) | 31 | 31 | 30 | 30 | 29 | 28 | 27 | 26 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 17 | 16 | 15 | 14 | 13 | 12 | 12 | 11 | 10 | 10 | 9 | 9 | 8 | 8 | 8 |
| Oppressive (%) | 22 | 21 | 19 | 18 | 17 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Miserable (%) | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 2 | 12 | 29 | 31 | 22 | 3 |
| 2 | 3 | 13 | 30 | 31 | 21 | 3 |
| 3 | 3 | 14 | 31 | 30 | 19 | 2 |
| 4 | 4 | 15 | 31 | 30 | 18 | 2 |
| 5 | 5 | 15 | 32 | 29 | 17 | 2 |
| 6 | 6 | 16 | 33 | 28 | 15 | 2 |
| 7 | 7 | 17 | 33 | 27 | 14 | 2 |
| 8 | 8 | 19 | 34 | 26 | 13 | 1 |
| 9 | 9 | 20 | 34 | 24 | 12 | 1 |
| 10 | 10 | 21 | 34 | 23 | 11 | 1 |
| 11 | 11 | 22 | 34 | 22 | 10 | 1 |
| 12 | 13 | 23 | 34 | 21 | 9 | 1 |
| 13 | 14 | 24 | 34 | 20 | 8 | 1 |
| 14 | 16 | 24 | 34 | 19 | 7 | 0 |
| 15 | 17 | 25 | 33 | 18 | 6 | 0 |
| 16 | 19 | 26 | 33 | 17 | 5 | 0 |
| 17 | 20 | 26 | 32 | 17 | 5 | 0 |
| 18 | 22 | 27 | 32 | 16 | 4 | 0 |
| 19 | 23 | 27 | 31 | 15 | 4 | 0 |
| 20 | 25 | 28 | 30 | 14 | 3 | 0 |
| 21 | 27 | 28 | 29 | 13 | 3 | 0 |
| 22 | 29 | 28 | 28 | 12 | 2 | 0 |
| 23 | 31 | 28 | 27 | 12 | 2 | 0 |
| 24 | 32 | 28 | 27 | 11 | 2 | 0 |
| 25 | 34 | 28 | 26 | 10 | 1 | 0 |
| 26 | 36 | 28 | 25 | 10 | 1 | 0 |
| 27 | 38 | 28 | 24 | 9 | 1 | 0 |
| 28 | 39 | 28 | 24 | 9 | 1 | 0 |
| 29 | 40 | 27 | 23 | 8 | 1 | 0 |
| 30 | 42 | 27 | 22 | 8 | 1 | 0 |
| 31 | 43 | 27 | 22 | 8 | 1 | 0 |
Wind in October
Winds average 13 km/h in October.
Across October, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 12 | light breeze |
| 2 | 12 | light breeze |
| 3 | 12 | light breeze |
| 4 | 12 | light breeze |
| 5 | 12 | light breeze |
| 6 | 12 | light breeze |
| 7 | 12 | light breeze |
| 8 | 12 | light breeze |
| 9 | 12 | light breeze |
| 10 | 12 | light breeze |
| 11 | 12 | light breeze |
| 12 | 12 | light breeze |
| 13 | 12 | light breeze |
| 14 | 12 | light breeze |
| 15 | 12 | light breeze |
| 16 | 13 | light breeze |
| 17 | 13 | light breeze |
| 18 | 13 | light breeze |
| 19 | 13 | light breeze |
| 20 | 13 | light breeze |
| 21 | 13 | light breeze |
| 22 | 13 | light breeze |
| 23 | 13 | light breeze |
| 24 | 13 | light breeze |
| 25 | 13 | light breeze |
| 26 | 13 | light breeze |
| 27 | 13 | light breeze |
| 28 | 13 | light breeze |
| 29 | 13 | light breeze |
| 30 | 13 | light breeze |
| 31 | 13 | light breeze |
Sunrise & sunset in October
Daylight runs from about 11 h 42 min at the start of October to 10 h 48 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 54 minutes over October. Sunrise moves from 6:17 AM to 6:40 AM, and sunset from 5:59 PM to 5:25 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.7 | 11.7 | 11.6 | 11.6 | 11.6 | 11.5 | 11.5 | 11.5 | 11.4 | 11.4 | 11.4 | 11.3 | 11.3 | 11.3 | 11.2 | 11.2 | 11.2 | 11.1 | 11.1 | 11.1 | 11.0 | 11.0 | 11.0 | 11.0 | 10.9 | 10.9 | 10.9 | 10.8 | 10.8 | 10.8 | 10.8 |
| Sunrise (AM) | 6:17 | 6:18 | 6:18 | 6:19 | 6:20 | 6:20 | 6:21 | 6:22 | 6:23 | 6:23 | 6:24 | 6:25 | 6:25 | 6:26 | 6:27 | 6:28 | 6:28 | 6:29 | 6:30 | 6:31 | 6:32 | 6:32 | 6:33 | 6:34 | 6:35 | 6:36 | 6:36 | 6:37 | 6:38 | 6:39 | 6:40 |
| Sunset (PM) | 5:59 | 5:57 | 5:56 | 5:55 | 5:53 | 5:52 | 5:51 | 5:50 | 5:48 | 5:47 | 5:46 | 5:45 | 5:43 | 5:42 | 5:41 | 5:40 | 5:39 | 5:38 | 5:37 | 5:36 | 5:35 | 5:33 | 5:32 | 5:31 | 5:30 | 5:29 | 5:29 | 5:28 | 5:27 | 5:26 | 5:25 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.7 | 6:17 | 5:59 |
| 2 | 11.7 | 6:18 | 5:57 |
| 3 | 11.6 | 6:18 | 5:56 |
| 4 | 11.6 | 6:19 | 5:55 |
| 5 | 11.6 | 6:20 | 5:53 |
| 6 | 11.5 | 6:20 | 5:52 |
| 7 | 11.5 | 6:21 | 5:51 |
| 8 | 11.5 | 6:22 | 5:50 |
| 9 | 11.4 | 6:23 | 5:48 |
| 10 | 11.4 | 6:23 | 5:47 |
| 11 | 11.4 | 6:24 | 5:46 |
| 12 | 11.3 | 6:25 | 5:45 |
| 13 | 11.3 | 6:25 | 5:43 |
| 14 | 11.3 | 6:26 | 5:42 |
| 15 | 11.2 | 6:27 | 5:41 |
| 16 | 11.2 | 6:28 | 5:40 |
| 17 | 11.2 | 6:28 | 5:39 |
| 18 | 11.1 | 6:29 | 5:38 |
| 19 | 11.1 | 6:30 | 5:37 |
| 20 | 11.1 | 6:31 | 5:36 |
| 21 | 11.0 | 6:32 | 5:35 |
| 22 | 11.0 | 6:32 | 5:33 |
| 23 | 11.0 | 6:33 | 5:32 |
| 24 | 11.0 | 6:34 | 5:31 |
| 25 | 10.9 | 6:35 | 5:30 |
| 26 | 10.9 | 6:36 | 5:29 |
| 27 | 10.9 | 6:36 | 5:29 |
| 28 | 10.8 | 6:37 | 5:28 |
| 29 | 10.8 | 6:38 | 5:27 |
| 30 | 10.8 | 6:39 | 5:26 |
| 31 | 10.8 | 6:40 | 5:25 |
Solar energy in October
Average shortwave solar energy reaching the ground each day in October, about 3.79 kWh/m².
For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.13 kWh/m² in May across the year — October's 3.79 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.8 | 3.8 | 3.8 | 3.8 | 3.7 | 3.7 | 3.6 | 3.6 | 3.6 | 3.5 | 3.5 | 3.5 | 3.4 | 3.4 | 3.4 | 3.3 |
| Level | Bright | Bright | Bright | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.0 | Bright |
| 2 | 4.0 | Bright |
| 3 | 4.0 | Bright |
| 4 | 4.0 | Moderate |
| 5 | 4.0 | Moderate |
| 6 | 4.0 | Moderate |
| 7 | 4.0 | Moderate |
| 8 | 4.0 | Moderate |
| 9 | 3.9 | Moderate |
| 10 | 3.9 | Moderate |
| 11 | 3.9 | Moderate |
| 12 | 3.9 | Moderate |
| 13 | 3.9 | Moderate |
| 14 | 3.9 | Moderate |
| 15 | 3.9 | Moderate |
| 16 | 3.8 | Moderate |
| 17 | 3.8 | Moderate |
| 18 | 3.8 | Moderate |
| 19 | 3.8 | Moderate |
| 20 | 3.7 | Moderate |
| 21 | 3.7 | Moderate |
| 22 | 3.6 | Moderate |
| 23 | 3.6 | Moderate |
| 24 | 3.6 | Moderate |
| 25 | 3.5 | Moderate |
| 26 | 3.5 | Moderate |
| 27 | 3.5 | Moderate |
| 28 | 3.4 | Moderate |
| 29 | 3.4 | Moderate |
| 30 | 3.4 | Moderate |
| 31 | 3.3 | Moderate |
Hazard calendar for Sendai
In October, Sendai sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Sendai sits in the Pacific typhoon belt; the season peaks July–October.
Sendai's rainy season runs June–July, when most of the year's rain falls.
Is October a good time to visit Sendai?
Our two travel scores rate October for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
October is one of the better times to visit Sendai for general sightseeing.
What to pack for Sendai in October
From October's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In October, Sendai sees daytime highs around 24°C and nights near 20°C. Worth packing: light clothes and rain gear. About 9 days see rain.
Sea temperature near Sendai in October
The nearest coast averages about 25°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 18 km away) is warmest in August at about 28°C and coldest in February near 17°C.
It's comfortable for a long swim from May 9 to Dec 11 — about 7.1 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 18 | 17 | 17 | 18 | 21 | 23 | 26 | 28 | 27 | 25 | 22 | 20 |
| Comfort | Cool | Cool | Cool | Cool | Refreshing | Refreshing | Warm | Tropical | Warm | Warm | Refreshing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 18 | Cool |
| Feb | 17 | Cool |
| Mar | 17 | Cool |
| Apr | 18 | Cool |
| May | 21 | Refreshing |
| Jun | 23 | Refreshing |
| Jul | 26 | Warm |
| Aug | 28 | Tropical |
| Sep | 27 | Warm |
| Oct | 25 | Warm |
| Nov | 22 | Refreshing |
| Dec | 20 | Cool |
UV index in Sendai in October
Clear-sky midday UV in October peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Sendai peaks around July 10 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 5 | 7 | 8 | 8 | 10 | 11 | 9 | 10 | 6 | 5 | 3 |
| Level | Moderate | Moderate | High | Very high | Very high | Extreme | Extreme | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 5 | Moderate |
| Mar | 7 | High |
| Apr | 8 | Very high |
| May | 8 | Very high |
| Jun | 10 | Extreme |
| Jul | 11 | Extreme |
| Aug | 9 | Very high |
| Sep | 10 | Very high |
| Oct | 6 | High |
| Nov | 5 | Moderate |
| Dec | 3 | Moderate |
Air quality in Sendai in October
Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.
Air quality in Sendai is worst in April — around 23 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 12 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 15 | 19 | 22 | 23 | 21 | 17 | 12 | 14 | 12 | 12 | 14 | 13 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 15 | Moderate |
| Feb | 19 | Moderate |
| Mar | 22 | Moderate |
| Apr | 23 | Moderate |
| May | 21 | Moderate |
| Jun | 17 | Moderate |
| Jul | 12 | Moderate |
| Aug | 14 | Moderate |
| Sep | 12 | Moderate |
| Oct | 12 | Moderate |
| Nov | 14 | Moderate |
| Dec | 13 | Moderate |
Where is Sendai?
Sendai sits at 31.8°N, 130.3°E, 5 m above sea level, in Japan. The nearest listed city is Ichikikushikino, 10 km away.
Topography around Sendai
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sendai.
Within 3 km, the terrain around Sendai has only modest variations in elevation — a maximum elevation change of 179 m around an average of 32 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 686 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,644 m.
The land around Sendai is covered by trees (41%) and artificial surfaces (41%) within 3 km, trees (69%) and water (21%) within 16 km, and water (52%) and trees (41%) within 80 km.
Japan travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 100 V · 50 / 60 Hz
- Prices
- ≈ 65% of US
- price level, 2025
- GDP per capita
- $35,951
- 2025
- Happiness
- 6.1 / 10
- World Happiness, 2025
- Safe drinking water
- 99%
- of population, 2024
- Homicide rate
- 0.2
- per 100k, 2023
- Road deaths
- 3.6
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very low
- EF EPI 446
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Sendai (31.8167°, 130.3°, elevation 5 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).