Kumamoto weather in August
In August, Kumamoto sees average daytime highs of 30°C and overnight lows near 24°C, with 135 mm of rain across 13 wet days and about 13.2 hours of daylight. It is the 1st-warmest and 7th-wettest month of the year here.
Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 31% of the time in August, and the air most often feels oppressive.
Daylight stretches from about 13 h 36 min at the start of August to 12 h 42 min by month's end. Set against the rest of the year, August is Kumamoto's 5th-clearest and 12th-windiest month. For the whole year in context, see Kumamoto's year-round climate.
- Daytime high
- 30°
- 1st warmest
- Overnight low
- 24°
- 12th coldest
- Rainfall
- 135 mm
- 13 wet days
- Daylight
- 13 h 12 min
- 5:45 AM – 6:58 PM
- Cloud cover
- 61%
- 5th clearest
- Wind
- 7 km/h
- 12th windiest
- Solar energy
- 4.82 kWh/m²
- Travel score
- 4.7
- out of 10
Kumamoto is city in Kumamoto prefecture, Japan.
- Density
- 1,897/km²
- people per km²
- Founded
- 1889
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in August
Day-to-day highs hold fairly steady near 30°C through the month.
A typical August day in Kumamoto reaches about 30°C in the afternoon and slips back to 24°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 33°C. Set against its neighbours, August runs about 1°C warmer than July and about 3°C warmer than September.
| 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) | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 29 |
| Avg low (°C) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 30 | 24 |
| 2 | 30 | 24 |
| 3 | 30 | 24 |
| 4 | 30 | 24 |
| 5 | 30 | 24 |
| 6 | 30 | 24 |
| 7 | 30 | 24 |
| 8 | 30 | 24 |
| 9 | 30 | 24 |
| 10 | 30 | 24 |
| 11 | 30 | 24 |
| 12 | 30 | 24 |
| 13 | 30 | 24 |
| 14 | 30 | 24 |
| 15 | 30 | 24 |
| 16 | 30 | 24 |
| 17 | 30 | 24 |
| 18 | 30 | 24 |
| 19 | 30 | 24 |
| 20 | 30 | 24 |
| 21 | 30 | 24 |
| 22 | 30 | 24 |
| 23 | 30 | 24 |
| 24 | 30 | 24 |
| 25 | 30 | 24 |
| 26 | 29 | 24 |
| 27 | 29 | 23 |
| 28 | 29 | 23 |
| 29 | 29 | 23 |
| 30 | 29 | 23 |
| 31 | 29 | 23 |
How August really feels in Kumamoto
Once humidity and wind are folded in, August averages 27 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Kumamoto weather by month
How August compares with the rest of the year at a glance. August is the 1st-warmest and 7th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 9° / 3° | 79 | 10.6 | 1.8 | 10.1 | 1.8 |
| Feb | 10° / 4° | 96 | 10.2 | 1.2 | 10.8 | 2.3 |
| Mar | 14° / 7° | 142 | 13.1 | 0.2 | 11.8 | 3.8 |
| Apr | 18° / 11° | 154 | 12.1 | 0 | 12.8 | 5.5 |
| May | 22° / 15° | 178 | 12 | 0 | 13.7 | 6.4 |
| Jun | 25° / 20° | 403 | 17 | 0 | 14.1 | 5.4 |
| Jul | 29° / 23° | 301 | 16.3 | 0 | 13.9 | 4.8 |
| Aug | 30° / 24° | 135 | 13 | 0 | 13.2 | 4.7 |
| Sep | 27° / 21° | 156 | 11.8 | 0 | 12.2 | 6.1 |
| Oct | 23° / 15° | 98 | 8.3 | 0 | 11.2 | 7.1 |
| Nov | 17° / 10° | 93 | 8.8 | 0 | 10.3 | 5.6 |
| Dec | 11° / 5° | 84 | 10 | 0.9 | 9.9 | 2.9 |
Cloud cover in August
The sky is clear or mostly clear about 31% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 16% of August, with mostly cloudy or overcast conditions the remaining 53%.
| 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 (%) | 50 | 50 | 50 | 50 | 50 | 48 | 47 | 47 | 47 | 47 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 47 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 47 | 47 | 46 | 46 | 46 | 46 |
| Cloudier (%) | 50 | 50 | 50 | 50 | 50 | 52 | 53 | 53 | 53 | 53 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 53 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 53 | 53 | 54 | 54 | 54 | 54 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 50 | 50 |
| 2 | 50 | 50 |
| 3 | 50 | 50 |
| 4 | 50 | 50 |
| 5 | 50 | 50 |
| 6 | 48 | 52 |
| 7 | 47 | 53 |
| 8 | 47 | 53 |
| 9 | 47 | 53 |
| 10 | 47 | 53 |
| 11 | 46 | 54 |
| 12 | 46 | 54 |
| 13 | 46 | 54 |
| 14 | 46 | 54 |
| 15 | 46 | 54 |
| 16 | 46 | 54 |
| 17 | 46 | 54 |
| 18 | 47 | 53 |
| 19 | 48 | 52 |
| 20 | 48 | 52 |
| 21 | 48 | 52 |
| 22 | 48 | 52 |
| 23 | 48 | 52 |
| 24 | 48 | 52 |
| 25 | 48 | 52 |
| 26 | 47 | 53 |
| 27 | 47 | 53 |
| 28 | 46 | 54 |
| 29 | 46 | 54 |
| 30 | 46 | 54 |
| 31 | 46 | 54 |
Chance of precipitation in August
Kumamoto gets around 135 mm of rain over 13 wet days in August. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 42% and peaks near 45% 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 (%) | 41 | 41 | 41 | 40 | 40 | 40 | 40 | 40 | 40 | 41 | 41 | 41 | 42 | 42 | 42 | 43 | 43 | 43 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 45 | 44 |
| Rain chance (%) | |
|---|---|
| 1 | 41 |
| 2 | 41 |
| 3 | 41 |
| 4 | 40 |
| 5 | 40 |
| 6 | 40 |
| 7 | 40 |
| 8 | 40 |
| 9 | 40 |
| 10 | 41 |
| 11 | 41 |
| 12 | 41 |
| 13 | 42 |
| 14 | 42 |
| 15 | 42 |
| 16 | 43 |
| 17 | 43 |
| 18 | 43 |
| 19 | 44 |
| 20 | 44 |
| 21 | 44 |
| 22 | 44 |
| 23 | 44 |
| 24 | 44 |
| 25 | 44 |
| 26 | 44 |
| 27 | 44 |
| 28 | 44 |
| 29 | 44 |
| 30 | 45 |
| 31 | 44 |
Humidity in August
Most of August feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the oppressive band about 76% of days. Sticky, muggy-or-worse air turns up on roughly 98% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Humid (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 5 | 6 | 6 | 7 | 8 |
| Muggy (%) | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 9 | 9 | 10 | 11 | 12 | 13 | 14 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 24 | 25 | 26 | 27 | 28 |
| Oppressive (%) | 84 | 85 | 85 | 85 | 85 | 85 | 85 | 83 | 83 | 82 | 82 | 81 | 79 | 79 | 78 | 78 | 77 | 75 | 74 | 72 | 72 | 70 | 70 | 69 | 68 | 68 | 65 | 64 | 63 | 62 | 60 |
| Miserable (%) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 7 | 7 | 6 | 5 | 5 | 4 | 4 | 3 | 3 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|
| 1 | 0 | 0 | 6 | 84 | 10 |
| 2 | 0 | 0 | 5 | 85 | 10 |
| 3 | 0 | 0 | 5 | 85 | 10 |
| 4 | 0 | 0 | 5 | 85 | 10 |
| 5 | 0 | 0 | 5 | 85 | 10 |
| 6 | 0 | 0 | 5 | 85 | 10 |
| 7 | 0 | 0 | 5 | 85 | 10 |
| 8 | 0 | 0 | 6 | 83 | 11 |
| 9 | 0 | 0 | 6 | 83 | 11 |
| 10 | 0 | 0 | 7 | 82 | 11 |
| 11 | 0 | 0 | 7 | 82 | 11 |
| 12 | 0 | 0 | 8 | 81 | 11 |
| 13 | 0 | 1 | 9 | 79 | 11 |
| 14 | 0 | 1 | 9 | 79 | 11 |
| 15 | 0 | 1 | 10 | 78 | 11 |
| 16 | 0 | 1 | 11 | 78 | 10 |
| 17 | 0 | 1 | 12 | 77 | 10 |
| 18 | 1 | 1 | 13 | 75 | 10 |
| 19 | 1 | 2 | 14 | 74 | 9 |
| 20 | 1 | 2 | 16 | 72 | 9 |
| 21 | 1 | 2 | 17 | 72 | 8 |
| 22 | 1 | 3 | 18 | 70 | 8 |
| 23 | 1 | 3 | 19 | 70 | 7 |
| 24 | 1 | 3 | 20 | 69 | 7 |
| 25 | 1 | 4 | 21 | 68 | 6 |
| 26 | 1 | 4 | 22 | 68 | 5 |
| 27 | 1 | 5 | 24 | 65 | 5 |
| 28 | 1 | 6 | 25 | 64 | 4 |
| 29 | 1 | 6 | 26 | 63 | 4 |
| 30 | 1 | 7 | 27 | 62 | 3 |
| 31 | 1 | 8 | 28 | 60 | 3 |
Wind in August
Winds average 7 km/h in August, the calmest month.
Across August, daily wind ranges from about 7 km/h on the calmest days to 7 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) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 7 | calm |
| 2 | 7 | calm |
| 3 | 7 | calm |
| 4 | 7 | calm |
| 5 | 7 | calm |
| 6 | 7 | calm |
| 7 | 7 | calm |
| 8 | 7 | calm |
| 9 | 7 | calm |
| 10 | 7 | calm |
| 11 | 7 | calm |
| 12 | 7 | calm |
| 13 | 7 | calm |
| 14 | 7 | calm |
| 15 | 7 | calm |
| 16 | 7 | calm |
| 17 | 7 | calm |
| 18 | 7 | calm |
| 19 | 7 | calm |
| 20 | 7 | calm |
| 21 | 7 | calm |
| 22 | 7 | calm |
| 23 | 7 | calm |
| 24 | 7 | calm |
| 25 | 7 | calm |
| 26 | 7 | calm |
| 27 | 7 | calm |
| 28 | 7 | calm |
| 29 | 7 | calm |
| 30 | 7 | calm |
| 31 | 7 | calm |
Sunrise & sunset in August
Daylight runs from about 13 h 36 min at the start of August to 12 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 54 minutes over August. Sunrise moves from 5:34 AM to 5:55 AM, and sunset from 7:12 PM to 6:40 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) | 13.6 | 13.6 | 13.6 | 13.6 | 13.5 | 13.5 | 13.5 | 13.5 | 13.4 | 13.4 | 13.4 | 13.3 | 13.3 | 13.3 | 13.3 | 13.2 | 13.2 | 13.2 | 13.1 | 13.1 | 13.1 | 13.0 | 13.0 | 13.0 | 12.9 | 12.9 | 12.9 | 12.8 | 12.8 | 12.8 | 12.7 |
| Sunrise (AM) | 5:34 | 5:35 | 5:36 | 5:36 | 5:37 | 5:38 | 5:38 | 5:39 | 5:40 | 5:41 | 5:41 | 5:42 | 5:43 | 5:43 | 5:44 | 5:45 | 5:45 | 5:46 | 5:47 | 5:47 | 5:48 | 5:49 | 5:50 | 5:50 | 5:51 | 5:52 | 5:52 | 5:53 | 5:54 | 5:54 | 5:55 |
| Sunset (PM) | 7:12 | 7:12 | 7:11 | 7:10 | 7:09 | 7:08 | 7:07 | 7:06 | 7:05 | 7:04 | 7:03 | 7:02 | 7:01 | 7:00 | 6:59 | 6:58 | 6:57 | 6:56 | 6:55 | 6:53 | 6:52 | 6:51 | 6:50 | 6:49 | 6:47 | 6:46 | 6:45 | 6:43 | 6:42 | 6:41 | 6:40 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.6 | 5:34 | 7:12 |
| 2 | 13.6 | 5:35 | 7:12 |
| 3 | 13.6 | 5:36 | 7:11 |
| 4 | 13.6 | 5:36 | 7:10 |
| 5 | 13.5 | 5:37 | 7:09 |
| 6 | 13.5 | 5:38 | 7:08 |
| 7 | 13.5 | 5:38 | 7:07 |
| 8 | 13.5 | 5:39 | 7:06 |
| 9 | 13.4 | 5:40 | 7:05 |
| 10 | 13.4 | 5:41 | 7:04 |
| 11 | 13.4 | 5:41 | 7:03 |
| 12 | 13.3 | 5:42 | 7:02 |
| 13 | 13.3 | 5:43 | 7:01 |
| 14 | 13.3 | 5:43 | 7:00 |
| 15 | 13.3 | 5:44 | 6:59 |
| 16 | 13.2 | 5:45 | 6:58 |
| 17 | 13.2 | 5:45 | 6:57 |
| 18 | 13.2 | 5:46 | 6:56 |
| 19 | 13.1 | 5:47 | 6:55 |
| 20 | 13.1 | 5:47 | 6:53 |
| 21 | 13.1 | 5:48 | 6:52 |
| 22 | 13.0 | 5:49 | 6:51 |
| 23 | 13.0 | 5:50 | 6:50 |
| 24 | 13.0 | 5:50 | 6:49 |
| 25 | 12.9 | 5:51 | 6:47 |
| 26 | 12.9 | 5:52 | 6:46 |
| 27 | 12.9 | 5:52 | 6:45 |
| 28 | 12.8 | 5:53 | 6:43 |
| 29 | 12.8 | 5:54 | 6:42 |
| 30 | 12.8 | 5:54 | 6:41 |
| 31 | 12.7 | 5:55 | 6:40 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 4.82 kWh/m².
For context, solar energy here swings from a low near 2.31 kWh/m² to a high of 5.15 kWh/m² in May across the year — August's 4.82 kWh/m² sits near the top of that range.
| 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) | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 4.9 | 4.9 | 4.9 | 4.9 | 4.8 | 4.8 | 4.8 | 4.8 | 4.7 | 4.7 | 4.7 | 4.7 | 4.6 | 4.6 | 4.6 | 4.5 | 4.5 | 4.5 | 4.5 | 4.4 | 4.4 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.1 | Bright |
| 2 | 5.1 | Bright |
| 3 | 5.1 | Bright |
| 4 | 5.1 | Bright |
| 5 | 5.1 | Bright |
| 6 | 5.0 | Bright |
| 7 | 5.0 | Bright |
| 8 | 5.0 | Bright |
| 9 | 5.0 | Bright |
| 10 | 5.0 | Bright |
| 11 | 4.9 | Bright |
| 12 | 4.9 | Bright |
| 13 | 4.9 | Bright |
| 14 | 4.9 | Bright |
| 15 | 4.8 | Bright |
| 16 | 4.8 | Bright |
| 17 | 4.8 | Bright |
| 18 | 4.8 | Bright |
| 19 | 4.7 | Bright |
| 20 | 4.7 | Bright |
| 21 | 4.7 | Bright |
| 22 | 4.7 | Bright |
| 23 | 4.6 | Bright |
| 24 | 4.6 | Bright |
| 25 | 4.6 | Bright |
| 26 | 4.5 | Bright |
| 27 | 4.5 | Bright |
| 28 | 4.5 | Bright |
| 29 | 4.5 | Bright |
| 30 | 4.4 | Bright |
| 31 | 4.4 | Bright |
Hazard calendar for Kumamoto
In August, Kumamoto sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Kumamoto sits in the Pacific typhoon belt; the season peaks July–October.
Kumamoto's rainy season runs June–July, when most of the year's rain falls.
Is August a good time to visit Kumamoto?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is a reasonable time to visit Kumamoto for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Kumamoto in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Kumamoto sees daytime highs around 30°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.
Sea temperature near Kumamoto in August
The nearest coast averages about 27°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in August at about 27°C and coldest in February near 13°C.
It's comfortable for a long swim from May 27 to Nov 13 — about 5.6 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 14 | 13 | 14 | 16 | 19 | 22 | 25 | 27 | 26 | 23 | 20 | 17 |
| Comfort | Bracing | Bracing | Bracing | Cool | Cool | Refreshing | Warm | Warm | Warm | Refreshing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 14 | Bracing |
| Feb | 13 | Bracing |
| Mar | 14 | Bracing |
| Apr | 16 | Cool |
| May | 19 | Cool |
| Jun | 22 | Refreshing |
| Jul | 25 | Warm |
| Aug | 27 | Warm |
| Sep | 26 | Warm |
| Oct | 23 | Refreshing |
| Nov | 20 | Cool |
| Dec | 17 | Cool |
UV index in Kumamoto in August
Clear-sky midday UV in August peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Kumamoto peaks around June 22 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 | 6 | 8 | 8 | 10 | 10 | 9 | 10 | 7 | 4 | 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 | 6 | High |
| Apr | 8 | Very high |
| May | 8 | Very high |
| Jun | 10 | Extreme |
| Jul | 10 | Extreme |
| Aug | 9 | Very high |
| Sep | 10 | Very high |
| Oct | 7 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Air quality in Kumamoto in August
Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.
Air quality in Kumamoto is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (July, 13 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) | 18 | 20 | 25 | 25 | 23 | 19 | 13 | 15 | 14 | 14 | 16 | 15 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 18 | Moderate |
| Feb | 20 | Moderate |
| Mar | 25 | Moderate |
| Apr | 25 | Moderate |
| May | 23 | Moderate |
| Jun | 19 | Moderate |
| Jul | 13 | Moderate |
| Aug | 15 | Moderate |
| Sep | 14 | Moderate |
| Oct | 14 | Moderate |
| Nov | 16 | Moderate |
| Dec | 15 | Moderate |
Where is Kumamoto?
Kumamoto sits at 32.8°N, 130.7°E, 9 m above sea level, in Japan. The nearest listed city is Kotō, 6.0 km away.
Topography around Kumamoto
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Kumamoto.
Within 3 km, the terrain around Kumamoto has significant variations in elevation — a maximum elevation change of 441 m around an average of 51 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 674 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,765 m.
The land around Kumamoto is covered by artificial surfaces (60%) and trees (34%) within 3 km, trees (31%), artificial surfaces (26%) and cropland (25%) within 16 km, and trees (66%) 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 Kumamoto (32.8059°, 130.6918°, elevation 9 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).