Tsushima weather in August
In August, Tsushima sees average daytime highs of 27°C and overnight lows near 26°C, with 189 mm of rain across 11.7 wet days and about 13.3 hours of daylight. It is the 1st-warmest and 3rd-wettest month of the year here.
Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 37% of the time in August, and the air most often feels miserable.
Daylight stretches from about 13 h 42 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Tsushima's 5th-clearest and 9th-windiest month. For the whole year in context, see Tsushima's year-round climate.
- Daytime high
- 27°
- 1st warmest
- Overnight low
- 26°
- 12th coldest
- Rainfall
- 189 mm
- 11.7 wet days
- Daylight
- 13 h 18 min
- 5:48 AM – 7:06 PM
- Cloud cover
- 57%
- 5th clearest
- Wind
- 23 km/h
- 9th windiest
- Solar energy
- 5.3 kWh/m²
- Travel score
- 6.3
- out of 10
Temperature in August
Day-to-day highs hold fairly steady near 27°C through the month.
A typical August day in Tsushima reaches about 27°C in the afternoon and slips back to 26°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 29°C. Set against its neighbours, August runs about 2°C warmer than July and about 2°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) | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 |
| Avg low (°C) | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 26 |
| 2 | 27 | 26 |
| 3 | 27 | 26 |
| 4 | 27 | 26 |
| 5 | 27 | 26 |
| 6 | 27 | 26 |
| 7 | 27 | 26 |
| 8 | 27 | 26 |
| 9 | 27 | 26 |
| 10 | 27 | 26 |
| 11 | 27 | 26 |
| 12 | 27 | 26 |
| 13 | 27 | 26 |
| 14 | 27 | 26 |
| 15 | 27 | 26 |
| 16 | 27 | 26 |
| 17 | 27 | 26 |
| 18 | 27 | 26 |
| 19 | 27 | 26 |
| 20 | 27 | 26 |
| 21 | 27 | 26 |
| 22 | 27 | 26 |
| 23 | 27 | 26 |
| 24 | 27 | 26 |
| 25 | 27 | 25 |
| 26 | 27 | 25 |
| 27 | 27 | 25 |
| 28 | 27 | 25 |
| 29 | 26 | 25 |
| 30 | 26 | 25 |
| 31 | 26 | 25 |
Tsushima weather by month
How August compares with the rest of the year at a glance. August is the 1st-warmest and 3rd-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° / 6° | 65 | 8.6 | 0.8 | 10 | 1.9 |
| Feb | 10° / 7° | 65 | 8.4 | 0.4 | 10.7 | 2.2 |
| Mar | 12° / 10° | 113 | 9.8 | 0.1 | 11.7 | 3.3 |
| Apr | 15° / 13° | 124 | 9.3 | 0 | 12.8 | 4.7 |
| May | 18° / 17° | 129 | 8.3 | 0 | 13.8 | 6.1 |
| Jun | 21° / 20° | 202 | 10.8 | 0 | 14.2 | 6.2 |
| Jul | 25° / 24° | 215 | 11.8 | 0 | 14.1 | 6.4 |
| Aug | 27° / 26° | 189 | 11.7 | 0 | 13.3 | 6.3 |
| Sep | 25° / 23° | 171 | 10.6 | 0 | 12.2 | 6.8 |
| Oct | 21° / 19° | 91 | 6.9 | 0 | 11.1 | 7.1 |
| Nov | 16° / 14° | 82 | 8.3 | 0 | 10.2 | 5.5 |
| Dec | 12° / 9° | 63 | 8.5 | 0.3 | 9.8 | 3.2 |
Cloud cover in August
The sky is clear or mostly clear about 37% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 13% of August, with mostly cloudy or overcast conditions the remaining 50%. Skies tend to cloud over 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 (%) | 55 | 54 | 54 | 54 | 54 | 52 | 52 | 52 | 50 | 50 | 50 | 49 | 49 | 49 | 48 | 48 | 48 | 49 | 49 | 49 | 50 | 50 | 50 | 49 | 49 | 48 | 48 | 47 | 48 | 48 | 47 |
| Cloudier (%) | 45 | 46 | 46 | 46 | 46 | 48 | 48 | 48 | 50 | 50 | 50 | 51 | 51 | 51 | 52 | 52 | 52 | 51 | 51 | 51 | 50 | 50 | 50 | 51 | 51 | 52 | 52 | 53 | 52 | 52 | 53 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 55 | 45 |
| 2 | 54 | 46 |
| 3 | 54 | 46 |
| 4 | 54 | 46 |
| 5 | 54 | 46 |
| 6 | 52 | 48 |
| 7 | 52 | 48 |
| 8 | 52 | 48 |
| 9 | 50 | 50 |
| 10 | 50 | 50 |
| 11 | 50 | 50 |
| 12 | 49 | 51 |
| 13 | 49 | 51 |
| 14 | 49 | 51 |
| 15 | 48 | 52 |
| 16 | 48 | 52 |
| 17 | 48 | 52 |
| 18 | 49 | 51 |
| 19 | 49 | 51 |
| 20 | 49 | 51 |
| 21 | 50 | 50 |
| 22 | 50 | 50 |
| 23 | 50 | 50 |
| 24 | 49 | 51 |
| 25 | 49 | 51 |
| 26 | 48 | 52 |
| 27 | 48 | 52 |
| 28 | 47 | 53 |
| 29 | 48 | 52 |
| 30 | 48 | 52 |
| 31 | 47 | 53 |
Chance of precipitation in August
Tsushima gets around 189 mm of rain over 11.7 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 38% and peaks near 41% on the wettest days. The odds climb 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 (%) | 29 | 29 | 30 | 31 | 32 | 32 | 33 | 34 | 35 | 36 | 37 | 37 | 38 | 39 | 39 | 40 | 40 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 40 |
| Rain chance (%) | |
|---|---|
| 1 | 29 |
| 2 | 29 |
| 3 | 30 |
| 4 | 31 |
| 5 | 32 |
| 6 | 32 |
| 7 | 33 |
| 8 | 34 |
| 9 | 35 |
| 10 | 36 |
| 11 | 37 |
| 12 | 37 |
| 13 | 38 |
| 14 | 39 |
| 15 | 39 |
| 16 | 40 |
| 17 | 40 |
| 18 | 41 |
| 19 | 41 |
| 20 | 41 |
| 21 | 41 |
| 22 | 41 |
| 23 | 41 |
| 24 | 41 |
| 25 | 41 |
| 26 | 41 |
| 27 | 41 |
| 28 | 41 |
| 29 | 41 |
| 30 | 41 |
| 31 | 40 |
Humidity in August
Most of August feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the miserable band about 54% of days. Sticky, muggy-or-worse air turns up on roughly 99% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Humid (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 |
| Muggy (%) | 6 | 6 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 7 | 8 | 10 | 11 | 12 | 14 | 16 | 17 | 19 | 21 | 22 | 24 | 26 | 28 | 30 |
| Oppressive (%) | 25 | 24 | 24 | 24 | 24 | 25 | 26 | 27 | 28 | 30 | 31 | 33 | 35 | 36 | 37 | 39 | 39 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 39 | 39 | 39 | 38 | 38 | 38 | 37 |
| Miserable (%) | 69 | 70 | 71 | 71 | 71 | 70 | 70 | 69 | 68 | 66 | 65 | 62 | 60 | 59 | 57 | 54 | 53 | 51 | 49 | 48 | 46 | 45 | 43 | 41 | 40 | 38 | 36 | 34 | 32 | 30 | 28 |
| Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|
| 1 | 0 | 6 | 25 | 69 |
| 2 | 0 | 6 | 24 | 70 |
| 3 | 0 | 5 | 24 | 71 |
| 4 | 0 | 5 | 24 | 71 |
| 5 | 0 | 5 | 24 | 71 |
| 6 | 0 | 5 | 25 | 70 |
| 7 | 0 | 4 | 26 | 70 |
| 8 | 0 | 4 | 27 | 69 |
| 9 | 0 | 4 | 28 | 68 |
| 10 | 0 | 4 | 30 | 66 |
| 11 | 0 | 4 | 31 | 65 |
| 12 | 0 | 5 | 33 | 62 |
| 13 | 0 | 5 | 35 | 60 |
| 14 | 0 | 5 | 36 | 59 |
| 15 | 0 | 6 | 37 | 57 |
| 16 | 1 | 6 | 39 | 54 |
| 17 | 1 | 7 | 39 | 53 |
| 18 | 1 | 8 | 40 | 51 |
| 19 | 1 | 10 | 40 | 49 |
| 20 | 1 | 11 | 40 | 48 |
| 21 | 1 | 12 | 40 | 46 |
| 22 | 1 | 14 | 40 | 45 |
| 23 | 2 | 16 | 40 | 43 |
| 24 | 2 | 17 | 40 | 41 |
| 25 | 2 | 19 | 39 | 40 |
| 26 | 2 | 21 | 39 | 38 |
| 27 | 3 | 22 | 39 | 36 |
| 28 | 3 | 24 | 38 | 34 |
| 29 | 3 | 26 | 38 | 32 |
| 30 | 4 | 28 | 38 | 30 |
| 31 | 4 | 30 | 37 | 28 |
Wind in August
Winds average 23 km/h in August.
Across August, daily wind ranges from about 22 km/h on the calmest days to 25 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) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 25 |
| Feels | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 22 | breezy |
| 2 | 22 | breezy |
| 3 | 22 | breezy |
| 4 | 22 | breezy |
| 5 | 22 | breezy |
| 6 | 22 | breezy |
| 7 | 22 | breezy |
| 8 | 22 | breezy |
| 9 | 22 | breezy |
| 10 | 23 | breezy |
| 11 | 23 | breezy |
| 12 | 23 | breezy |
| 13 | 23 | breezy |
| 14 | 23 | breezy |
| 15 | 23 | breezy |
| 16 | 23 | breezy |
| 17 | 23 | breezy |
| 18 | 23 | breezy |
| 19 | 23 | breezy |
| 20 | 23 | breezy |
| 21 | 23 | breezy |
| 22 | 23 | breezy |
| 23 | 24 | breezy |
| 24 | 24 | breezy |
| 25 | 24 | breezy |
| 26 | 24 | breezy |
| 27 | 24 | breezy |
| 28 | 24 | breezy |
| 29 | 24 | breezy |
| 30 | 25 | breezy |
| 31 | 25 | breezy |
Sunrise & sunset in August
Daylight runs from about 13 h 42 min at the start of August to 12 h 48 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 5:37 AM to 5:59 AM, and sunset from 7:21 PM to 6:46 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) | 13.7 | 13.7 | 13.7 | 13.6 | 13.6 | 13.6 | 13.6 | 13.5 | 13.5 | 13.5 | 13.4 | 13.4 | 13.4 | 13.4 | 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 |
| Sunrise (AM) | 5:37 | 5:38 | 5:39 | 5:39 | 5:40 | 5:41 | 5:42 | 5:42 | 5:43 | 5:44 | 5:45 | 5:45 | 5:46 | 5:47 | 5:48 | 5:48 | 5:49 | 5:50 | 5:51 | 5:51 | 5:52 | 5:53 | 5:54 | 5:54 | 5:55 | 5:56 | 5:56 | 5:57 | 5:58 | 5:59 | 5:59 |
| Sunset (PM) | 7:21 | 7:20 | 7:19 | 7:18 | 7:17 | 7:16 | 7:15 | 7:14 | 7:13 | 7:12 | 7:11 | 7:10 | 7:09 | 7:08 | 7:07 | 7:06 | 7:04 | 7:03 | 7:02 | 7:01 | 7:00 | 6:58 | 6:57 | 6:56 | 6:54 | 6:53 | 6:52 | 6:50 | 6:49 | 6:48 | 6:46 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.7 | 5:37 | 7:21 |
| 2 | 13.7 | 5:38 | 7:20 |
| 3 | 13.7 | 5:39 | 7:19 |
| 4 | 13.6 | 5:39 | 7:18 |
| 5 | 13.6 | 5:40 | 7:17 |
| 6 | 13.6 | 5:41 | 7:16 |
| 7 | 13.6 | 5:42 | 7:15 |
| 8 | 13.5 | 5:42 | 7:14 |
| 9 | 13.5 | 5:43 | 7:13 |
| 10 | 13.5 | 5:44 | 7:12 |
| 11 | 13.4 | 5:45 | 7:11 |
| 12 | 13.4 | 5:45 | 7:10 |
| 13 | 13.4 | 5:46 | 7:09 |
| 14 | 13.4 | 5:47 | 7:08 |
| 15 | 13.3 | 5:48 | 7:07 |
| 16 | 13.3 | 5:48 | 7:06 |
| 17 | 13.3 | 5:49 | 7:04 |
| 18 | 13.2 | 5:50 | 7:03 |
| 19 | 13.2 | 5:51 | 7:02 |
| 20 | 13.2 | 5:51 | 7:01 |
| 21 | 13.1 | 5:52 | 7:00 |
| 22 | 13.1 | 5:53 | 6:58 |
| 23 | 13.1 | 5:54 | 6:57 |
| 24 | 13.0 | 5:54 | 6:56 |
| 25 | 13.0 | 5:55 | 6:54 |
| 26 | 13.0 | 5:56 | 6:53 |
| 27 | 12.9 | 5:56 | 6:52 |
| 28 | 12.9 | 5:57 | 6:50 |
| 29 | 12.9 | 5:58 | 6:49 |
| 30 | 12.8 | 5:59 | 6:48 |
| 31 | 12.8 | 5:59 | 6:46 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 5.3 kWh/m².
For context, solar energy here swings from a low near 2.41 kWh/m² to a high of 5.87 kWh/m² in May across the year — August's 5.3 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) | 5.8 | 5.8 | 5.7 | 5.7 | 5.7 | 5.6 | 5.6 | 5.6 | 5.5 | 5.5 | 5.5 | 5.4 | 5.4 | 5.4 | 5.3 | 5.3 | 5.3 | 5.2 | 5.2 | 5.2 | 5.1 | 5.1 | 5.1 | 5.0 | 5.0 | 5.0 | 4.9 | 4.9 | 4.8 | 4.8 | 4.8 |
| 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 | 5.8 | Bright |
| 2 | 5.8 | Bright |
| 3 | 5.7 | Bright |
| 4 | 5.7 | Bright |
| 5 | 5.7 | Bright |
| 6 | 5.6 | Bright |
| 7 | 5.6 | Bright |
| 8 | 5.6 | Bright |
| 9 | 5.5 | Bright |
| 10 | 5.5 | Bright |
| 11 | 5.5 | Bright |
| 12 | 5.4 | Bright |
| 13 | 5.4 | Bright |
| 14 | 5.4 | Bright |
| 15 | 5.3 | Bright |
| 16 | 5.3 | Bright |
| 17 | 5.3 | Bright |
| 18 | 5.2 | Bright |
| 19 | 5.2 | Bright |
| 20 | 5.2 | Bright |
| 21 | 5.1 | Bright |
| 22 | 5.1 | Bright |
| 23 | 5.1 | Bright |
| 24 | 5.0 | Bright |
| 25 | 5.0 | Bright |
| 26 | 5.0 | Bright |
| 27 | 4.9 | Bright |
| 28 | 4.9 | Bright |
| 29 | 4.8 | Bright |
| 30 | 4.8 | Bright |
| 31 | 4.8 | Bright |
Hazard calendar for Tsushima
In August, Tsushima sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.
Tsushima sits in the Pacific typhoon belt; the season peaks July–October.
Tsushima's rainy season runs March–September, when most of the year's rain falls.
Is August a good time to visit Tsushima?
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 Tsushima for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Tsushima in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Tsushima sees daytime highs around 27°C and nights near 26°C. Pack light clothes. Worth having: rain gear, sun protection and a windbreaker. About 12 days see rain.
Sea temperature near Tsushima 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 March near 15°C.
It's comfortable for a long swim from Jun 6 to Nov 28 — about 5.8 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 16 | 15 | 15 | 16 | 18 | 21 | 25 | 27 | 26 | 24 | 21 | 19 |
| Comfort | Cool | Bracing | Bracing | Cool | Cool | Refreshing | Warm | Warm | Warm | Refreshing | Refreshing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 16 | Cool |
| Feb | 15 | Bracing |
| Mar | 15 | Bracing |
| Apr | 16 | Cool |
| May | 18 | Cool |
| Jun | 21 | Refreshing |
| Jul | 25 | Warm |
| Aug | 27 | Warm |
| Sep | 26 | Warm |
| Oct | 24 | Refreshing |
| Nov | 21 | Refreshing |
| Dec | 19 | Cool |
UV index in Tsushima 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 Tsushima peaks around August 24 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 4 | 6 | 7 | 8 | 8 | 8 | 9 | 9 | 6 | 4 | 2 |
| Level | Moderate | Moderate | High | Very high | Very high | Very high | Very high | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 4 | Moderate |
| Mar | 6 | High |
| Apr | 7 | Very high |
| May | 8 | Very high |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 9 | Very high |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 2 | Moderate |
Air quality in Tsushima 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 Tsushima is worst in April — around 37 µg/m³ PM2.5 (poor), about 2.2× the cleanest month (September, 17 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) | 23 | 27 | 35 | 37 | 35 | 27 | 20 | 19 | 17 | 17 | 21 | 19 |
| Level | Moderate | Moderate | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 23 | Moderate |
| Feb | 27 | Moderate |
| Mar | 35 | Poor |
| Apr | 37 | Poor |
| May | 35 | Poor |
| Jun | 27 | Moderate |
| Jul | 20 | Moderate |
| Aug | 19 | Moderate |
| Sep | 17 | Moderate |
| Oct | 17 | Moderate |
| Nov | 21 | Moderate |
| Dec | 19 | Moderate |
Where is Tsushima?
Tsushima sits at 34.2°N, 129.3°E, 6 m above sea level, in Japan. The nearest listed city is Iki, 62 km away.
Topography around Tsushima
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Tsushima.
Within 3 km, the terrain around Tsushima has significant variations in elevation — a maximum elevation change of 554 m around an average of 116 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 640 m; within 80 km, large variations in elevation — a maximum elevation change of 628 m.
The land around Tsushima is covered by trees (60%) and water (33%) within 3 km, water (67%) and trees (31%) within 16 km, and water (95%) 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 Tsushima (34.2063°, 129.2908°, elevation 6 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).