Nanyō in Fall
In fall (September, October and November), Nanyō sees average daytime highs around 16°C and overnight lows near 9°C, with 428 mm of precipitation over about 47 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 25°C in early September to 7°C by late November. The sky is clear or mostly clear about 16% of the time across fall, and the air most often feels dry.
Fall is Nanyō's 2nd-best season to visit on our travel score. For the whole year in context, see Nanyō's year-round climate.
- Avg daytime high
- 16°C
- 2nd-warmest season
- Avg overnight low
- 9°C
- Precipitation
- 428 mm
- 47 wet days
- Avg wind
- 8 km/h
- Travel score
- 3.9
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Nanyō in Fall
Over the season highs ease from about 25°C in early September to 7°C by late November.
A typical fall day in Nanyō reaches about 16°C and drops to 9°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Nanyō
Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 16 that feel at or below 0°C.
The story in fall is cold — wind chill drags the overnight "feels like" below the raw low.
Nanyō 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 | 0° / -5° | 190 | 24.4 | 25.2 | 9.7 | 0.0 |
| Feb | 1° / -5° | 137 | 20.6 | 20.5 | 10.5 | 0.0 |
| Mar | 5° / -2° | 146 | 19.4 | 15.6 | 11.7 | 0.2 |
| Apr | 11° / 3° | 115 | 15.1 | 4.4 | 13 | 2.5 |
| May | 18° / 9° | 116 | 14.2 | 0.1 | 14 | 5.1 |
| Jun | 22° / 14° | 155 | 15.2 | 0 | 14.6 | 5.4 |
| Jul | 25° / 18° | 241 | 19.9 | 0 | 14.4 | 5.1 |
| Aug | 26° / 19° | 183 | 17.4 | 0 | 13.5 | 5.4 |
| Sep | 22° / 15° | 155 | 15.3 | 0 | 12.3 | 5.5 |
| Oct | 16° / 9° | 139 | 14.3 | 0.1 | 11 | 4.5 |
| Nov | 10° / 2° | 134 | 17.5 | 5.5 | 9.9 | 1.7 |
| Dec | 3° / -3° | 181 | 23.2 | 19.2 | 9.4 | 0.0 |
Cloud cover in Fall
The sky is clear or mostly clear about 16% of the time across fall.
Chance of precipitation in Fall
Nanyō gets around 428 mm of rain and snow over 47 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 8 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 54 min in early September to 9 h 36 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 2.8 kWh/m².
Is fall a good time to visit Nanyō?
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 weaker month for outdoor sightseeing in Nanyō.
What to pack for Nanyō in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Nanyō sees daytime highs around 16°C and nights near 9°C. Pack a warm layer and rain gear. Worth having: light clothes. About 47 days see rain.
Sea temperature near Nanyō in Fall
The nearest coast averages about 22°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 65 km away) is warmest in August at about 26°C and coldest in March near 9°C.
It's comfortable for a long swim from Jun 21 to Oct 29 — about 4.3 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 12 | 10 | 9 | 11 | 15 | 20 | 23 | 26 | 25 | 22 | 18 | 15 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Warm | Warm | Refreshing | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 12 | Bracing |
| Feb | 10 | Bracing |
| Mar | 9 | Bracing |
| Apr | 11 | Bracing |
| May | 15 | Bracing |
| Jun | 20 | Cool |
| Jul | 23 | Refreshing |
| Aug | 26 | Warm |
| Sep | 25 | Warm |
| Oct | 22 | Refreshing |
| Nov | 18 | Cool |
| Dec | 15 | Bracing |
UV index in Nanyō in Fall
Clear-sky midday UV across fall averages around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Nanyō peaks around August 12 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 7 | 8 | 8 | 9 | 10 | 8 | 5 | 3 | 2 |
| Level | Moderate | Moderate | Moderate | High | Very high | Very high | Very high | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 10 | Very high |
| Sep | 8 | Very high |
| Oct | 5 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Nanyō 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 Nanyō is worst in April — around 22 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 10 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) | 11 | 14 | 21 | 22 | 21 | 16 | 14 | 12 | 12 | 12 | 11 | 10 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 14 | Moderate |
| Mar | 21 | Moderate |
| Apr | 22 | Moderate |
| May | 21 | Moderate |
| Jun | 16 | Moderate |
| Jul | 14 | Moderate |
| Aug | 12 | Moderate |
| Sep | 12 | Good |
| Oct | 12 | Good |
| Nov | 11 | Good |
| Dec | 10 | Good |
Where is Nanyō?
Nanyō sits at 38.0°N, 140.1°E, 212 m above sea level, in Japan. The nearest listed city is Takahata, 8.0 km away.
Topography around Nanyō
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nanyō.
Within 3 km, the terrain around Nanyō has only modest variations in elevation — a maximum elevation change of 199 m around an average of 222 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 803 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,110 m.
The land around Nanyō is covered by cropland (61%) and trees (21%) within 3 km, trees (61%) and cropland (29%) within 16 km, and trees (77%) 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 Nanyō (38.0432°, 140.1128°, elevation 212 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.