Usuki weather in October
In October, Usuki sees average daytime highs of 23°C and overnight lows near 15°C, with 150 mm of rain across 8.4 wet days and about 11.2 hours of daylight. It is the 6th-warmest and 5th-wettest month of the year here.
Highs ease over the month, from about 25°C in the first days to 21°C by the end. The sky is clear or mostly clear about 44% of the time in October, and the air most often feels dry.
Daylight stretches from about 11 h 42 min at the start of October to 10 h 42 min by month's end. Set against the rest of the year, October is Usuki's 3rd-clearest and 6th-windiest month. For the whole year in context, see Usuki's year-round climate.
- Daytime high
- 23°
- 6th warmest
- Overnight low
- 15°
- 8th coldest
- Rainfall
- 150 mm
- 8.4 wet days
- Daylight
- 11 h 12 min
- 6:23 AM – 5:33 PM
- Cloud cover
- 49%
- 3rd clearest
- Wind
- 9 km/h
- 6th windiest
- Solar energy
- 3.73 kWh/m²
- Travel score
- 7.2
- out of 10
Temperature in October
Highs ease over the month, from about 25°C in the first days to 21°C by the end.
A typical October day in Usuki reaches about 23°C in the afternoon and slips back to 15°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 26°C. Set against its neighbours, October runs about 5°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) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 |
| Avg low (°C) | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 12 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 25 | 18 |
| 2 | 25 | 18 |
| 3 | 25 | 18 |
| 4 | 25 | 18 |
| 5 | 25 | 18 |
| 6 | 25 | 17 |
| 7 | 25 | 17 |
| 8 | 24 | 17 |
| 9 | 24 | 17 |
| 10 | 24 | 17 |
| 11 | 24 | 16 |
| 12 | 24 | 16 |
| 13 | 24 | 16 |
| 14 | 23 | 16 |
| 15 | 23 | 16 |
| 16 | 23 | 15 |
| 17 | 23 | 15 |
| 18 | 23 | 15 |
| 19 | 23 | 15 |
| 20 | 22 | 14 |
| 21 | 22 | 14 |
| 22 | 22 | 14 |
| 23 | 22 | 14 |
| 24 | 22 | 14 |
| 25 | 22 | 14 |
| 26 | 21 | 13 |
| 27 | 21 | 13 |
| 28 | 21 | 13 |
| 29 | 21 | 13 |
| 30 | 21 | 13 |
| 31 | 21 | 12 |
How October really feels in Usuki
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.
Usuki weather by month
How October compares with the rest of the year at a glance. October is the 6th-warmest and 5th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 11° / 3° | 56 | 5.4 | 0.4 | 10.1 | 2.9 |
| Feb | 12° / 3° | 64 | 7 | 0.6 | 10.8 | 3.3 |
| Mar | 15° / 6° | 97 | 10.2 | 0 | 11.7 | 4.7 |
| Apr | 20° / 11° | 117 | 10.2 | 0 | 12.8 | 6.2 |
| May | 24° / 15° | 141 | 10.9 | 0 | 13.7 | 6.6 |
| Jun | 27° / 20° | 291 | 16.4 | 0 | 14.1 | 5.2 |
| Jul | 31° / 24° | 217 | 16.4 | 0 | 14 | 3.8 |
| Aug | 31° / 24° | 207 | 17.4 | 0 | 13.2 | 3.6 |
| Sep | 28° / 21° | 229 | 14.6 | 0 | 12.2 | 5.4 |
| Oct | 23° / 15° | 150 | 8.4 | 0 | 11.2 | 7.2 |
| Nov | 18° / 10° | 79 | 6.9 | 0 | 10.3 | 6.2 |
| Dec | 13° / 5° | 56 | 5.7 | 0 | 9.9 | 4.1 |
Cloud cover in October
The sky is clear or mostly clear about 44% of the time in October.
Beyond those clear spells, partly cloudy skies cover about 14% of October, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to open up as the month goes on.
| 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 | 51 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 57 | 58 | 58 | 59 | 59 | 60 | 60 | 61 | 61 | 60 | 61 | 61 | 61 | 61 | 62 | 62 | 62 | 62 | 64 | 64 | 64 | 64 |
| Cloudier (%) | 50 | 49 | 49 | 48 | 47 | 46 | 45 | 44 | 43 | 43 | 42 | 42 | 41 | 41 | 40 | 40 | 39 | 39 | 40 | 39 | 39 | 39 | 39 | 38 | 38 | 38 | 38 | 36 | 36 | 36 | 36 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 50 | 50 |
| 2 | 51 | 49 |
| 3 | 51 | 49 |
| 4 | 52 | 48 |
| 5 | 53 | 47 |
| 6 | 54 | 46 |
| 7 | 55 | 45 |
| 8 | 56 | 44 |
| 9 | 57 | 43 |
| 10 | 57 | 43 |
| 11 | 58 | 42 |
| 12 | 58 | 42 |
| 13 | 59 | 41 |
| 14 | 59 | 41 |
| 15 | 60 | 40 |
| 16 | 60 | 40 |
| 17 | 61 | 39 |
| 18 | 61 | 39 |
| 19 | 60 | 40 |
| 20 | 61 | 39 |
| 21 | 61 | 39 |
| 22 | 61 | 39 |
| 23 | 61 | 39 |
| 24 | 62 | 38 |
| 25 | 62 | 38 |
| 26 | 62 | 38 |
| 27 | 62 | 38 |
| 28 | 64 | 36 |
| 29 | 64 | 36 |
| 30 | 64 | 36 |
| 31 | 64 | 36 |
Chance of precipitation in October
Usuki gets around 150 mm of rain over 8.4 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 28% and peaks near 39% 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 (%) | 39 | 38 | 37 | 36 | 35 | 33 | 32 | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Rain chance (%) | |
|---|---|
| 1 | 39 |
| 2 | 38 |
| 3 | 37 |
| 4 | 36 |
| 5 | 35 |
| 6 | 33 |
| 7 | 32 |
| 8 | 31 |
| 9 | 30 |
| 10 | 29 |
| 11 | 28 |
| 12 | 27 |
| 13 | 26 |
| 14 | 25 |
| 15 | 25 |
| 16 | 25 |
| 17 | 24 |
| 18 | 24 |
| 19 | 24 |
| 20 | 24 |
| 21 | 24 |
| 22 | 25 |
| 23 | 25 |
| 24 | 25 |
| 25 | 25 |
| 26 | 25 |
| 27 | 25 |
| 28 | 25 |
| 29 | 25 |
| 30 | 25 |
| 31 | 25 |
Humidity in October
Most of October feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, October lands in the dry band about 37% of days. Sticky, muggy-or-worse air turns up on roughly 15% 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 (%) | 10 | 11 | 12 | 13 | 15 | 17 | 19 | 21 | 23 | 25 | 27 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | 50 | 52 | 54 | 55 | 57 | 58 | 59 | 61 | 62 | 63 |
| Comfortable (%) | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 29 | 29 | 28 | 28 | 27 | 26 | 26 | 25 | 25 | 25 | 24 | 24 |
| Humid (%) | 30 | 30 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 20 | 19 | 18 | 18 | 17 | 17 | 16 | 15 | 15 | 14 | 14 | 14 | 13 | 13 | 12 | 11 | 11 | 10 |
| Muggy (%) | 24 | 23 | 22 | 21 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 11 | 10 | 9 | 8 | 8 | 7 | 6 | 6 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 3 |
| Oppressive (%) | 12 | 11 | 10 | 9 | 9 | 8 | 7 | 7 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Miserable (%) | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 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 | 10 | 23 | 30 | 24 | 12 | 1 |
| 2 | 11 | 24 | 30 | 23 | 11 | 1 |
| 3 | 12 | 25 | 30 | 22 | 10 | 1 |
| 4 | 13 | 26 | 29 | 21 | 9 | 1 |
| 5 | 15 | 27 | 28 | 21 | 9 | 0 |
| 6 | 17 | 28 | 27 | 20 | 8 | 0 |
| 7 | 19 | 29 | 26 | 19 | 7 | 0 |
| 8 | 21 | 30 | 25 | 18 | 7 | 0 |
| 9 | 23 | 30 | 24 | 17 | 6 | 0 |
| 10 | 25 | 31 | 23 | 16 | 5 | 0 |
| 11 | 27 | 31 | 22 | 15 | 5 | 0 |
| 12 | 30 | 31 | 21 | 14 | 4 | 0 |
| 13 | 32 | 31 | 20 | 13 | 4 | 0 |
| 14 | 34 | 31 | 20 | 12 | 3 | 0 |
| 15 | 36 | 31 | 19 | 11 | 3 | 0 |
| 16 | 38 | 31 | 18 | 11 | 3 | 0 |
| 17 | 40 | 30 | 18 | 10 | 2 | 0 |
| 18 | 42 | 30 | 17 | 9 | 2 | 0 |
| 19 | 44 | 30 | 17 | 8 | 1 | 0 |
| 20 | 46 | 29 | 16 | 8 | 1 | 0 |
| 21 | 48 | 29 | 15 | 7 | 1 | 0 |
| 22 | 50 | 28 | 15 | 6 | 1 | 0 |
| 23 | 52 | 28 | 14 | 6 | 0 | 0 |
| 24 | 54 | 27 | 14 | 5 | 0 | 0 |
| 25 | 55 | 26 | 14 | 5 | 0 | 0 |
| 26 | 57 | 26 | 13 | 4 | 0 | 0 |
| 27 | 58 | 25 | 13 | 4 | 0 | 0 |
| 28 | 59 | 25 | 12 | 4 | 0 | 0 |
| 29 | 61 | 25 | 11 | 3 | 0 | 0 |
| 30 | 62 | 24 | 11 | 3 | 0 | 0 |
| 31 | 63 | 24 | 10 | 3 | 0 | 0 |
Wind in October
Winds average 9 km/h in October.
Across October, daily wind ranges from about 9 km/h on the calmest days to 9 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) | 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 |
| 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 | 9 | calm |
| 2 | 9 | calm |
| 3 | 9 | calm |
| 4 | 9 | calm |
| 5 | 9 | calm |
| 6 | 9 | calm |
| 7 | 9 | calm |
| 8 | 9 | calm |
| 9 | 9 | calm |
| 10 | 9 | calm |
| 11 | 9 | calm |
| 12 | 9 | calm |
| 13 | 9 | calm |
| 14 | 9 | calm |
| 15 | 9 | calm |
| 16 | 9 | calm |
| 17 | 9 | calm |
| 18 | 9 | calm |
| 19 | 9 | calm |
| 20 | 9 | calm |
| 21 | 9 | calm |
| 22 | 9 | calm |
| 23 | 9 | calm |
| 24 | 9 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
| 29 | 9 | calm |
| 30 | 9 | calm |
| 31 | 9 | calm |
Sunrise & sunset in October
Daylight runs from about 11 h 42 min at the start of October to 10 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 60 minutes over October. Sunrise moves from 6:11 AM to 6:36 AM, and sunset from 5:52 PM to 5:17 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 | 11.6 | 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 | 10.9 | 10.9 | 10.9 | 10.8 | 10.8 | 10.8 | 10.7 | 10.7 | 10.7 |
| Sunrise (AM) | 6:11 | 6:12 | 6:13 | 6:14 | 6:14 | 6:15 | 6:16 | 6:17 | 6:17 | 6:18 | 6:19 | 6:20 | 6:21 | 6:21 | 6:22 | 6:23 | 6:24 | 6:25 | 6:25 | 6:26 | 6:27 | 6:28 | 6:29 | 6:30 | 6:30 | 6:31 | 6:32 | 6:33 | 6:34 | 6:35 | 6:36 |
| Sunset (PM) | 5:52 | 5:51 | 5:49 | 5:48 | 5:47 | 5:45 | 5:44 | 5:43 | 5:41 | 5:40 | 5:39 | 5:38 | 5:36 | 5:35 | 5:34 | 5:33 | 5:32 | 5:30 | 5:29 | 5:28 | 5:27 | 5:26 | 5:25 | 5:24 | 5:23 | 5:22 | 5:21 | 5:20 | 5:19 | 5:18 | 5:17 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.7 | 6:11 | 5:52 |
| 2 | 11.6 | 6:12 | 5:51 |
| 3 | 11.6 | 6:13 | 5:49 |
| 4 | 11.6 | 6:14 | 5:48 |
| 5 | 11.5 | 6:14 | 5:47 |
| 6 | 11.5 | 6:15 | 5:45 |
| 7 | 11.5 | 6:16 | 5:44 |
| 8 | 11.4 | 6:17 | 5:43 |
| 9 | 11.4 | 6:17 | 5:41 |
| 10 | 11.4 | 6:18 | 5:40 |
| 11 | 11.3 | 6:19 | 5:39 |
| 12 | 11.3 | 6:20 | 5:38 |
| 13 | 11.3 | 6:21 | 5:36 |
| 14 | 11.2 | 6:21 | 5:35 |
| 15 | 11.2 | 6:22 | 5:34 |
| 16 | 11.2 | 6:23 | 5:33 |
| 17 | 11.1 | 6:24 | 5:32 |
| 18 | 11.1 | 6:25 | 5:30 |
| 19 | 11.1 | 6:25 | 5:29 |
| 20 | 11.0 | 6:26 | 5:28 |
| 21 | 11.0 | 6:27 | 5:27 |
| 22 | 11.0 | 6:28 | 5:26 |
| 23 | 10.9 | 6:29 | 5:25 |
| 24 | 10.9 | 6:30 | 5:24 |
| 25 | 10.9 | 6:30 | 5:23 |
| 26 | 10.8 | 6:31 | 5:22 |
| 27 | 10.8 | 6:32 | 5:21 |
| 28 | 10.8 | 6:33 | 5:20 |
| 29 | 10.7 | 6:34 | 5:19 |
| 30 | 10.7 | 6:35 | 5:18 |
| 31 | 10.7 | 6:36 | 5:17 |
Solar energy in October
Average shortwave solar energy reaching the ground each day in October, about 3.73 kWh/m².
For context, solar energy here swings from a low near 2.49 kWh/m² to a high of 5.5 kWh/m² in May across the year — October's 3.73 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 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 | 3.7 | 3.7 | 3.7 | 3.7 | 3.6 | 3.6 | 3.6 | 3.5 | 3.5 | 3.5 | 3.5 | 3.4 | 3.4 | 3.4 | 3.3 |
| 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 | 4.0 | Moderate |
| 2 | 3.9 | Moderate |
| 3 | 3.9 | Moderate |
| 4 | 3.9 | Moderate |
| 5 | 3.9 | Moderate |
| 6 | 3.9 | Moderate |
| 7 | 3.9 | Moderate |
| 8 | 3.9 | Moderate |
| 9 | 3.9 | Moderate |
| 10 | 3.8 | Moderate |
| 11 | 3.8 | Moderate |
| 12 | 3.8 | Moderate |
| 13 | 3.8 | Moderate |
| 14 | 3.8 | Moderate |
| 15 | 3.8 | Moderate |
| 16 | 3.8 | Moderate |
| 17 | 3.7 | Moderate |
| 18 | 3.7 | Moderate |
| 19 | 3.7 | Moderate |
| 20 | 3.7 | Moderate |
| 21 | 3.6 | Moderate |
| 22 | 3.6 | Moderate |
| 23 | 3.6 | Moderate |
| 24 | 3.5 | 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 Usuki
In October, Usuki sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.
Usuki sits in the Pacific typhoon belt; the season peaks July–October.
Usuki's rainy season runs May–October, when most of the year's rain falls.
Is October a good time to visit Usuki?
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 Usuki for general sightseeing.
What to pack for Usuki in October
From October's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In October, Usuki sees daytime highs around 23°C and nights near 15°C. Worth packing: light clothes and rain gear. About 8 days see rain.
Sea temperature near Usuki in October
The nearest coast averages about 23°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 29 km away) is warmest in August at about 26°C and coldest in February near 14°C.
It's comfortable for a long swim from Jun 5 to Nov 20 — 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) | 16 | 14 | 14 | 16 | 18 | 21 | 24 | 26 | 25 | 23 | 20 | 18 |
| Comfort | Cool | Bracing | Bracing | Cool | Cool | Refreshing | Warm | Warm | Warm | Refreshing | Refreshing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 16 | Cool |
| Feb | 14 | Bracing |
| Mar | 14 | Bracing |
| Apr | 16 | Cool |
| May | 18 | Cool |
| Jun | 21 | Refreshing |
| Jul | 24 | Warm |
| Aug | 26 | Warm |
| Sep | 25 | Warm |
| Oct | 23 | Refreshing |
| Nov | 20 | Refreshing |
| Dec | 18 | Cool |
UV index in Usuki 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 Usuki peaks around June 21 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 — in 11 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 5 | 6 | 7 | 8 | 10 | 10 | 9 | 10 | 6 | 4 | 3 |
| Level | Moderate | Moderate | High | Very high | Very high | Extreme | Very high | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 5 | Moderate |
| Mar | 6 | High |
| Apr | 7 | Very high |
| May | 8 | Very high |
| Jun | 10 | Extreme |
| Jul | 10 | Very high |
| Aug | 9 | Very high |
| Sep | 10 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Air quality in Usuki 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 Usuki is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 11 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) | 14 | 17 | 22 | 23 | 22 | 19 | 16 | 16 | 12 | 11 | 12 | 12 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Moderate | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 14 | Moderate |
| Feb | 17 | Moderate |
| Mar | 22 | Moderate |
| Apr | 23 | Moderate |
| May | 22 | Moderate |
| Jun | 19 | Moderate |
| Jul | 16 | Moderate |
| Aug | 16 | Moderate |
| Sep | 12 | Moderate |
| Oct | 11 | Good |
| Nov | 12 | Moderate |
| Dec | 12 | Good |
Where is Usuki?
Usuki sits at 33.1°N, 131.8°E, 4 m above sea level, in Japan. The nearest listed city is Tsukumiura, 8.0 km away.
Topography around Usuki
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Usuki.
Within 3 km, the terrain around Usuki has significant variations in elevation — a maximum elevation change of 460 m around an average of 65 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 716 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,758 m.
The land around Usuki is covered by trees (56%) and water (21%) within 3 km, trees (61%) and water (27%) within 16 km, and water (49%) and trees (45%) 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 Usuki (33.1234°, 131.804°, elevation 4 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).