Sendai weather in December
In December, Sendai sees average daytime highs of 14°C and overnight lows near 10°C, with 103 mm of rain across 10.6 wet days and about 10 hours of daylight. It is the 10th-warmest and 11th-wettest month of the year here.
Highs ease over the month, from about 16°C in the first days to 13°C by the end. The sky is clear or mostly clear about 28% of the time in December, and the air most often feels dry.
Daylight stretches from about 10 h 06 min at the start of December to 9 h 54 min by month's end. Set against the rest of the year, December is Sendai's 4th-clearest and 2nd-windiest month. For the whole year in context, see Sendai's year-round climate.
- Daytime high
- 14°
- 10th warmest
- Overnight low
- 10°
- 3rd coldest
- Rainfall
- 103 mm
- 10.6 wet days
- Daylight
- 9 h 54 min
- 7:17 AM – 5:13 PM
- Cloud cover
- 59%
- 4th clearest
- Wind
- 17 km/h
- 2nd windiest
- Solar energy
- 2.33 kWh/m²
- Travel score
- 4.0
- 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 December
Highs ease over the month, from about 16°C in the first days to 13°C by the end.
A typical December day in Sendai reaches about 14°C in the afternoon and slips back to 10°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 18°C. Set against its neighbours, December runs about 5°C cooler than November and about 2°C warmer than January.
| 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) | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
| Avg low (°C) | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 16 | 12 |
| 2 | 16 | 12 |
| 3 | 16 | 12 |
| 4 | 15 | 12 |
| 5 | 15 | 12 |
| 6 | 15 | 11 |
| 7 | 15 | 11 |
| 8 | 15 | 11 |
| 9 | 15 | 11 |
| 10 | 14 | 11 |
| 11 | 14 | 11 |
| 12 | 14 | 11 |
| 13 | 14 | 10 |
| 14 | 14 | 10 |
| 15 | 14 | 10 |
| 16 | 14 | 10 |
| 17 | 14 | 10 |
| 18 | 14 | 10 |
| 19 | 13 | 10 |
| 20 | 13 | 10 |
| 21 | 13 | 10 |
| 22 | 13 | 10 |
| 23 | 13 | 9 |
| 24 | 13 | 9 |
| 25 | 13 | 9 |
| 26 | 13 | 9 |
| 27 | 13 | 9 |
| 28 | 13 | 9 |
| 29 | 13 | 9 |
| 30 | 13 | 9 |
| 31 | 13 | 9 |
How December really feels in Sendai
Once humidity and wind are folded in, December 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.
December 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 December compares with the rest of the year at a glance. December is the 10th-warmest and 11th-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 December
The sky is clear or mostly clear about 28% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 18% of December, with mostly cloudy or overcast conditions the remaining 54%.
| 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 (%) | 51 | 51 | 50 | 50 | 49 | 48 | 48 | 47 | 46 | 46 | 45 | 45 | 45 | 44 | 44 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 46 | 46 | 45 | 45 | 46 | 44 | 44 | 44 |
| Cloudier (%) | 49 | 49 | 50 | 50 | 51 | 52 | 52 | 53 | 54 | 54 | 55 | 55 | 55 | 56 | 56 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 54 | 54 | 55 | 55 | 54 | 56 | 56 | 56 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 51 | 49 |
| 2 | 51 | 49 |
| 3 | 50 | 50 |
| 4 | 50 | 50 |
| 5 | 49 | 51 |
| 6 | 48 | 52 |
| 7 | 48 | 52 |
| 8 | 47 | 53 |
| 9 | 46 | 54 |
| 10 | 46 | 54 |
| 11 | 45 | 55 |
| 12 | 45 | 55 |
| 13 | 45 | 55 |
| 14 | 44 | 56 |
| 15 | 44 | 56 |
| 16 | 45 | 55 |
| 17 | 45 | 55 |
| 18 | 45 | 55 |
| 19 | 45 | 55 |
| 20 | 45 | 55 |
| 21 | 45 | 55 |
| 22 | 45 | 55 |
| 23 | 45 | 55 |
| 24 | 46 | 54 |
| 25 | 46 | 54 |
| 26 | 45 | 55 |
| 27 | 45 | 55 |
| 28 | 46 | 54 |
| 29 | 44 | 56 |
| 30 | 44 | 56 |
| 31 | 44 | 56 |
Chance of precipitation in December
Sendai gets around 103 mm of rain over 10.6 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 34% and peaks near 35% on the wettest days.
| 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 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 34 | 34 | 34 | 34 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 |
| Rain chance (%) | |
|---|---|
| 1 | 35 |
| 2 | 35 |
| 3 | 35 |
| 4 | 35 |
| 5 | 35 |
| 6 | 35 |
| 7 | 35 |
| 8 | 35 |
| 9 | 35 |
| 10 | 35 |
| 11 | 35 |
| 12 | 35 |
| 13 | 35 |
| 14 | 35 |
| 15 | 35 |
| 16 | 35 |
| 17 | 35 |
| 18 | 35 |
| 19 | 34 |
| 20 | 34 |
| 21 | 34 |
| 22 | 34 |
| 23 | 33 |
| 24 | 33 |
| 25 | 33 |
| 26 | 33 |
| 27 | 33 |
| 28 | 33 |
| 29 | 33 |
| 30 | 33 |
| 31 | 33 |
Humidity in December
Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the dry band about 93% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 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 (%) | 85 | 85 | 87 | 87 | 88 | 90 | 90 | 90 | 92 | 92 | 92 | 92 | 93 | 93 | 93 | 94 | 94 | 94 | 95 | 95 | 95 | 95 | 95 | 96 | 96 | 96 | 96 | 97 | 97 | 97 | 97 |
| Comfortable (%) | 11 | 11 | 10 | 10 | 9 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 |
| Humid (%) | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| 1 | 85 | 11 | 4 |
| 2 | 85 | 11 | 4 |
| 3 | 87 | 10 | 3 |
| 4 | 87 | 10 | 3 |
| 5 | 88 | 9 | 3 |
| 6 | 90 | 8 | 2 |
| 7 | 90 | 8 | 2 |
| 8 | 90 | 8 | 2 |
| 9 | 92 | 7 | 1 |
| 10 | 92 | 7 | 1 |
| 11 | 92 | 7 | 1 |
| 12 | 92 | 7 | 1 |
| 13 | 93 | 6 | 1 |
| 14 | 93 | 6 | 1 |
| 15 | 93 | 6 | 1 |
| 16 | 94 | 6 | 0 |
| 17 | 94 | 6 | 0 |
| 18 | 94 | 6 | 0 |
| 19 | 95 | 5 | 0 |
| 20 | 95 | 5 | 0 |
| 21 | 95 | 5 | 0 |
| 22 | 95 | 5 | 0 |
| 23 | 95 | 5 | 0 |
| 24 | 96 | 4 | 0 |
| 25 | 96 | 4 | 0 |
| 26 | 96 | 4 | 0 |
| 27 | 96 | 4 | 0 |
| 28 | 97 | 3 | 0 |
| 29 | 97 | 3 | 0 |
| 30 | 97 | 3 | 0 |
| 31 | 97 | 3 | 0 |
Wind in December
Winds average 17 km/h in December.
Across December, daily wind ranges from about 15 km/h on the calmest days to 18 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) | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 18 |
| 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 | 15 | light breeze |
| 2 | 16 | light breeze |
| 3 | 16 | light breeze |
| 4 | 16 | light breeze |
| 5 | 16 | light breeze |
| 6 | 16 | light breeze |
| 7 | 16 | light breeze |
| 8 | 16 | light breeze |
| 9 | 16 | light breeze |
| 10 | 16 | light breeze |
| 11 | 16 | light breeze |
| 12 | 17 | light breeze |
| 13 | 17 | light breeze |
| 14 | 17 | light breeze |
| 15 | 17 | light breeze |
| 16 | 17 | light breeze |
| 17 | 17 | light breeze |
| 18 | 17 | light breeze |
| 19 | 17 | light breeze |
| 20 | 17 | light breeze |
| 21 | 17 | light breeze |
| 22 | 17 | light breeze |
| 23 | 17 | light breeze |
| 24 | 17 | light breeze |
| 25 | 17 | light breeze |
| 26 | 17 | light breeze |
| 27 | 17 | light breeze |
| 28 | 17 | light breeze |
| 29 | 17 | light breeze |
| 30 | 18 | light breeze |
| 31 | 18 | light breeze |
Sunrise & sunset in December
Daylight runs from about 10 h 06 min at the start of December to 9 h 54 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 12 minutes over December. Sunrise moves from 7:06 AM to 7:24 AM, and sunset from 5:11 PM to 5:20 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) | 10.1 | 10.1 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 |
| Sunrise (AM) | 7:06 | 7:07 | 7:08 | 7:09 | 7:10 | 7:10 | 7:11 | 7:12 | 7:12 | 7:13 | 7:14 | 7:14 | 7:15 | 7:16 | 7:16 | 7:17 | 7:18 | 7:18 | 7:19 | 7:19 | 7:20 | 7:20 | 7:21 | 7:21 | 7:22 | 7:22 | 7:22 | 7:23 | 7:23 | 7:23 | 7:24 |
| Sunset (PM) | 5:11 | 5:11 | 5:11 | 5:11 | 5:11 | 5:11 | 5:11 | 5:11 | 5:11 | 5:11 | 5:12 | 5:12 | 5:12 | 5:12 | 5:13 | 5:13 | 5:13 | 5:14 | 5:14 | 5:14 | 5:15 | 5:15 | 5:16 | 5:16 | 5:17 | 5:17 | 5:18 | 5:19 | 5:19 | 5:20 | 5:20 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 10.1 | 7:06 | 5:11 |
| 2 | 10.1 | 7:07 | 5:11 |
| 3 | 10.0 | 7:08 | 5:11 |
| 4 | 10.0 | 7:09 | 5:11 |
| 5 | 10.0 | 7:10 | 5:11 |
| 6 | 10.0 | 7:10 | 5:11 |
| 7 | 10.0 | 7:11 | 5:11 |
| 8 | 10.0 | 7:12 | 5:11 |
| 9 | 10.0 | 7:12 | 5:11 |
| 10 | 10.0 | 7:13 | 5:11 |
| 11 | 10.0 | 7:14 | 5:12 |
| 12 | 10.0 | 7:14 | 5:12 |
| 13 | 9.9 | 7:15 | 5:12 |
| 14 | 9.9 | 7:16 | 5:12 |
| 15 | 9.9 | 7:16 | 5:13 |
| 16 | 9.9 | 7:17 | 5:13 |
| 17 | 9.9 | 7:18 | 5:13 |
| 18 | 9.9 | 7:18 | 5:14 |
| 19 | 9.9 | 7:19 | 5:14 |
| 20 | 9.9 | 7:19 | 5:14 |
| 21 | 9.9 | 7:20 | 5:15 |
| 22 | 9.9 | 7:20 | 5:15 |
| 23 | 9.9 | 7:21 | 5:16 |
| 24 | 9.9 | 7:21 | 5:16 |
| 25 | 9.9 | 7:22 | 5:17 |
| 26 | 9.9 | 7:22 | 5:17 |
| 27 | 9.9 | 7:22 | 5:18 |
| 28 | 9.9 | 7:23 | 5:19 |
| 29 | 9.9 | 7:23 | 5:19 |
| 30 | 9.9 | 7:23 | 5:20 |
| 31 | 9.9 | 7:24 | 5:20 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 2.33 kWh/m² — the year's lowest.
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 — December's 2.33 kWh/m² sits near the bottom.
| 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) | 2.5 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 |
| Level | 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 | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 2.5 | Moderate |
| 2 | 2.4 | Moderate |
| 3 | 2.4 | Moderate |
| 4 | 2.4 | Moderate |
| 5 | 2.4 | Moderate |
| 6 | 2.4 | Moderate |
| 7 | 2.4 | Moderate |
| 8 | 2.4 | Moderate |
| 9 | 2.3 | Moderate |
| 10 | 2.3 | Moderate |
| 11 | 2.3 | Moderate |
| 12 | 2.3 | Moderate |
| 13 | 2.3 | Moderate |
| 14 | 2.3 | Moderate |
| 15 | 2.3 | Moderate |
| 16 | 2.3 | Moderate |
| 17 | 2.3 | Moderate |
| 18 | 2.3 | Moderate |
| 19 | 2.3 | Moderate |
| 20 | 2.3 | Moderate |
| 21 | 2.3 | Moderate |
| 22 | 2.3 | Moderate |
| 23 | 2.4 | Moderate |
| 24 | 2.4 | Moderate |
| 25 | 2.4 | Moderate |
| 26 | 2.4 | Moderate |
| 27 | 2.4 | Moderate |
| 28 | 2.4 | Moderate |
| 29 | 2.4 | Moderate |
| 30 | 2.4 | Moderate |
| 31 | 2.4 | Moderate |
Hazard calendar for Sendai
In December, 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 December a good time to visit Sendai?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a reasonable time to visit Sendai for sightseeing.
What to pack for Sendai in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Sendai sees daytime highs around 14°C and nights near 10°C. Worth packing: a warm layer and rain gear. About 11 days see rain.
Sea temperature near Sendai in December
The nearest coast averages about 20°C in December — 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 December
Clear-sky midday UV in December peaks around 3 — 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 December
Average fine-particle pollution (PM2.5) through the year — so you can see where December 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).