Anan in Fall
In fall (September, October and November), Anan sees average daytime highs around 22°C and overnight lows near 19°C, with 536 mm of rain over about 33 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 27°C in early September to 16°C by late November. The sky is clear or mostly clear about 40% of the time across fall, and the air most often feels dry.
Fall is Anan's best season of the year to visit on our travel score. For the whole year in context, see Anan's year-round climate.
- Avg daytime high
- 22°C
- 2nd-warmest season
- Avg overnight low
- 19°C
- Rainfall
- 536 mm
- 33 wet days
- Avg wind
- 22 km/h
- Travel score
- 6.2
- best season of the year
- Months
- Sep · Oct · Nov
Temperature in Anan in Fall
Over the season highs ease from about 27°C in early September to 16°C by late November.
A typical fall day in Anan reaches about 22°C and drops to 19°C overnight. The warmest of the three months is September, the coolest November.
Anan 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 | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 11° / 7° | 78 | 9.5 | 10 | 2.6 |
| Feb | 11° / 7° | 84 | 10.2 | 10.7 | 2.7 |
| Mar | 14° / 10° | 128 | 11.7 | 11.7 | 3.8 |
| Apr | 17° / 14° | 137 | 10.6 | 12.8 | 5.3 |
| May | 20° / 18° | 165 | 10.6 | 13.7 | 6.1 |
| Jun | 23° / 21° | 243 | 13.8 | 14.2 | 5.8 |
| Jul | 26° / 25° | 187 | 11.8 | 14 | 6.3 |
| Aug | 27° / 26° | 114 | 9.4 | 13.3 | 6.6 |
| Sep | 26° / 24° | 221 | 13.5 | 12.2 | 6.2 |
| Oct | 22° / 20° | 212 | 11.2 | 11.1 | 6.6 |
| Nov | 18° / 15° | 104 | 8.6 | 10.2 | 5.9 |
| Dec | 13° / 10° | 84 | 8 | 9.8 | 3.9 |
Cloud cover in Fall
The sky is clear or mostly clear about 40% of the time across fall.
Chance of precipitation in Fall
Anan gets around 536 mm of rain over 33 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 22 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 3.5 kWh/m².
Hazard calendar for Anan
In fall, Anan overlaps its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Anan sits in the Pacific typhoon belt; the season peaks July–October.
Is fall a good time to visit Anan?
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 Anan for sightseeing.
What to pack for Anan in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Anan sees daytime highs around 22°C and nights near 19°C. Worth packing: light clothes, rain gear and a windbreaker. About 33 days see rain.
Sea temperature near Anan in Fall
The nearest coast averages about 24°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 21 km away) is warmest in August at about 27°C and coldest in February near 15°C.
It's comfortable for a long swim from May 24 to Dec 2 — about 6.3 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 17 | 15 | 16 | 17 | 19 | 22 | 25 | 27 | 26 | 24 | 22 | 19 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Refreshing | Warm | Warm | Warm | Warm | Refreshing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 17 | Cool |
| Feb | 15 | Cool |
| Mar | 16 | Cool |
| Apr | 17 | Cool |
| May | 19 | Cool |
| Jun | 22 | Refreshing |
| Jul | 25 | Warm |
| Aug | 27 | Warm |
| Sep | 26 | Warm |
| Oct | 24 | Warm |
| Nov | 22 | Refreshing |
| Dec | 19 | Cool |
UV index in Anan 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 Anan peaks around July 10 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (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 | 9 | 10 | 10 | 8 | 9 | 6 | 4 | 3 |
| Level | Moderate | Moderate | High | Very high | Very high | Very high | Extreme | 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 | 9 | Very high |
| Jun | 10 | Very high |
| Jul | 10 | Extreme |
| Aug | 8 | Very high |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Air quality in Anan 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 Anan is worst in April — around 19 µg/m³ PM2.5 (moderate), about 1.9× 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) | 12 | 15 | 19 | 19 | 17 | 14 | 10 | 10 | 10 | 10 | 11 | 10 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 12 | Good |
| Feb | 15 | Moderate |
| Mar | 19 | Moderate |
| Apr | 19 | Moderate |
| May | 17 | Moderate |
| Jun | 14 | Moderate |
| Jul | 10 | Good |
| Aug | 10 | Good |
| Sep | 10 | Good |
| Oct | 10 | Good |
| Nov | 11 | Good |
| Dec | 10 | Good |
Where is Anan?
Anan sits at 33.9°N, 134.7°E, 12 m above sea level, in Japan. The nearest listed city is Komatsushimachō, 11 km away.
Topography around Anan
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Anan.
Within 3 km, the terrain around Anan has significant variations in elevation — a maximum elevation change of 285 m around an average of 27 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 778 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,908 m.
The land around Anan is covered by cropland (32%), trees (29%) and artificial surfaces (28%) within 3 km, water (48%) and trees (37%) within 16 km, and water (50%) and trees (43%) 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 Anan (33.9167°, 134.65°, elevation 12 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.