Yakumo in Fall
In fall (September, October and November), Yakumo sees average daytime highs around 13°C and overnight lows near 10°C, with 388 mm of precipitation over about 39 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 22°C in early September to 4°C by late November. The sky is clear or mostly clear about 27% of the time across fall, and the air most often feels dry.
Fall is Yakumo's 2nd-best season to visit on our travel score. For the whole year in context, see Yakumo's year-round climate.
- Avg daytime high
- 13°C
- 2nd-warmest season
- Avg overnight low
- 10°C
- Precipitation
- 388 mm
- 39 wet days
- Avg wind
- 15 km/h
- Travel score
- 3.3
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Yakumo in Fall
Over the season highs ease from about 22°C in early September to 4°C by late November.
A typical fall day in Yakumo reaches about 13°C and drops to 10°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Yakumo
Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 20 that feel at or below 0°C.
The story in fall is cold — wind chill drags the overnight "feels like" below the raw low.
Yakumo 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 | -1° / -5° | 60 | 12.7 | 17 | 9.3 | 0.0 |
| Feb | -1° / -4° | 56 | 9.9 | 12.4 | 10.3 | 0.0 |
| Mar | 2° / -2° | 65 | 11 | 8.8 | 11.6 | 0.0 |
| Apr | 6° / 2° | 85 | 10.5 | 2.3 | 13.1 | 0.5 |
| May | 11° / 7° | 116 | 11.6 | 0 | 14.4 | 2.7 |
| Jun | 16° / 13° | 112 | 11.6 | 0 | 15 | 4.8 |
| Jul | 20° / 17° | 172 | 14.8 | 0 | 14.8 | 5.5 |
| Aug | 22° / 19° | 200 | 13.7 | 0 | 13.7 | 6.0 |
| Sep | 20° / 17° | 176 | 13.1 | 0 | 12.3 | 5.7 |
| Oct | 14° / 10° | 115 | 12.8 | 0 | 10.8 | 3.7 |
| Nov | 6° / 3° | 97 | 12.9 | 4.7 | 9.6 | 0.6 |
| Dec | 1° / -2° | 84 | 13.6 | 14.7 | 9 | 0.0 |
Cloud cover in Fall
The sky is clear or mostly clear about 27% of the time across fall.
Chance of precipitation in Fall
Yakumo gets around 388 mm of rain and snow over 39 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 15 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 13 hours in early September to 9 h 12 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 2.9 kWh/m².
Hazard calendar for Yakumo
In fall, Yakumo overlaps its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Yakumo sits in the Pacific typhoon belt; the season peaks July–October.
Is fall a good time to visit Yakumo?
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 Yakumo.
What to pack for Yakumo in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Yakumo sees daytime highs around 13°C and nights near 10°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 39 days see rain.
Sea temperature near Yakumo in Fall
The nearest coast averages about 16°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 16 km away) is warmest in August at about 21°C and coldest in February near 4°C.
It's comfortable for a long swim from Aug 5 to Sep 17 — about 1.4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 7 | 4 | 4 | 6 | 9 | 14 | 18 | 21 | 20 | 17 | 12 | 9 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 7 | Bracing |
| Feb | 4 | Bracing |
| Mar | 4 | Bracing |
| Apr | 6 | Bracing |
| May | 9 | Bracing |
| Jun | 14 | Bracing |
| Jul | 18 | Cool |
| Aug | 21 | Refreshing |
| Sep | 20 | Refreshing |
| Oct | 17 | Cool |
| Nov | 12 | Bracing |
| Dec | 9 | Bracing |
UV index in Yakumo in Fall
Clear-sky midday UV across fall averages around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Yakumo peaks around August 18 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 3 | 5 | 8 | 7 | 5 | 9 | 6 | 4 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | Very high | High | Moderate | Very high | High | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Moderate |
| Mar | 3 | Moderate |
| Apr | 5 | High |
| May | 8 | Very high |
| Jun | 7 | High |
| Jul | 5 | Moderate |
| Aug | 9 | Very high |
| Sep | 6 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Air quality in Yakumo 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 Yakumo is worst in April — around 17 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 7 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) | 8 | 11 | 16 | 17 | 15 | 9 | 8 | 8 | 7 | 9 | 8 | 7 |
| Level | Good | Good | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 11 | Good |
| Mar | 16 | Moderate |
| Apr | 17 | Moderate |
| May | 15 | Moderate |
| Jun | 9 | Good |
| Jul | 8 | Good |
| Aug | 8 | Good |
| Sep | 7 | Good |
| Oct | 9 | Good |
| Nov | 8 | Good |
| Dec | 7 | Good |
Where is Yakumo?
Yakumo sits at 42.3°N, 140.3°E, 9 m above sea level, in Japan. The nearest listed city is Honchō, 53 km away.
Topography around Yakumo
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Yakumo.
Within 3 km, the terrain around Yakumo has only modest variations in elevation — a maximum elevation change of 85 m around an average of 17 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 963 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,867 m.
The land around Yakumo is covered by cropland (49%) and water (22%) within 3 km, trees (59%) and water (30%) within 16 km, and water (54%) and trees (41%) 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 Yakumo (42.2539°, 140.2692°, 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.