Tsushima in Fall
In fall (September, October and November), Tsushima sees average daytime highs around 21°C and overnight lows near 19°C, with 344 mm of rain over about 26 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 26°C in early September to 14°C by late November. The sky is clear or mostly clear about 41% of the time across fall, and the air most often feels dry.
Fall is Tsushima's best season of the year to visit on our travel score. For the whole year in context, see Tsushima's year-round climate.
- Avg daytime high
- 21°C
- 2nd-warmest season
- Avg overnight low
- 19°C
- Rainfall
- 344 mm
- 26 wet days
- Avg wind
- 25 km/h
- Travel score
- 6.5
- best season of the year
- Months
- Sep · Oct · Nov
Temperature in Tsushima in Fall
Over the season highs ease from about 26°C in early September to 14°C by late November.
A typical fall day in Tsushima reaches about 21°C and drops to 19°C overnight. The warmest of the three months is September, the coolest November.
Tsushima weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| 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 Fall
The sky is clear or mostly clear about 41% of the time across fall.
Chance of precipitation in Fall
Tsushima gets around 344 mm of rain over 26 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 25 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 42 min in early September to 9 h 54 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.7 kWh/m².
Hazard calendar for Tsushima
In fall, Tsushima overlaps 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 fall a good time to visit Tsushima?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Tsushima for sightseeing.
What to pack for Tsushima in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Tsushima sees daytime highs around 21°C and nights near 19°C. Worth packing: light clothes, a warm layer, rain gear and a windbreaker. About 26 days see rain.
Sea temperature near Tsushima in Fall
The nearest coast averages about 23°C across fall — 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 Fall
Clear-sky midday UV across fall averages 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 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 Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall 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.