Sanzhi in Fall
In fall (September, October and November), Sanzhi sees average daytime highs around 26°C and overnight lows near 23°C, with 399 mm of rain 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 30°C in early September to 21°C by late November. The sky is clear or mostly clear about 26% of the time across fall, and the air most often feels oppressive.
Fall is Sanzhi's best season of the year to visit on our travel score. For the whole year in context, see Sanzhi's year-round climate.
- Avg daytime high
- 26°C
- 2nd-warmest season
- Avg overnight low
- 23°C
- Rainfall
- 399 mm
- 39 wet days
- Avg wind
- 20 km/h
- Travel score
- 5.9
- best season of the year
- Months
- Sep · Oct · Nov
Temperature in Sanzhi in Fall
Over the season highs ease from about 30°C in early September to 21°C by late November.
A typical fall day in Sanzhi reaches about 26°C and drops to 23°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Sanzhi
Once humidity and wind are folded in, fall brings about 18 days that feel above 32°C and 0 that feel at or below 0°C.
The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Sanzhi 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 | 18° / 14° | 78 | 13 | 10.6 | 5.1 |
| Feb | 18° / 14° | 96 | 12.6 | 11.1 | 5.2 |
| Mar | 20° / 16° | 113 | 14.3 | 11.8 | 5.5 |
| Apr | 24° / 19° | 120 | 13.3 | 12.6 | 6.1 |
| May | 27° / 23° | 157 | 13.7 | 13.2 | 5.8 |
| Jun | 29° / 25° | 158 | 13.4 | 13.5 | 4.5 |
| Jul | 31° / 27° | 111 | 11 | 13.4 | 4.3 |
| Aug | 31° / 27° | 187 | 14.3 | 12.9 | 4.2 |
| Sep | 29° / 25° | 169 | 14.2 | 12.2 | 5.1 |
| Oct | 26° / 23° | 130 | 12 | 11.4 | 6.4 |
| Nov | 23° / 20° | 100 | 12.6 | 10.8 | 6.2 |
| Dec | 20° / 16° | 83 | 12.9 | 10.5 | 5.6 |
Cloud cover in Fall
The sky is clear or mostly clear about 26% of the time across fall.
Chance of precipitation in Fall
Sanzhi gets around 399 mm of rain over 39 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 20 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 30 min in early September to 10 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 3.6 kWh/m².
Hazard calendar for Sanzhi
In fall, Sanzhi overlaps its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Sanzhi sits in the Pacific typhoon belt; the season peaks July–October.
Is fall a good time to visit Sanzhi?
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 Sanzhi for sightseeing.
What to pack for Sanzhi in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Sanzhi sees daytime highs around 26°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection and a windbreaker. About 39 days see rain.
Sea temperature near Sanzhi in Fall
The nearest coast averages about 25°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 18 km away) is warmest in August at about 28°C and coldest in February near 19°C.
It's comfortable for a long swim from Mar 14 to Jan 1 — about 9.7 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 19 | 19 | 20 | 23 | 25 | 27 | 28 | 28 | 27 | 25 | 23 | 21 |
| Comfort | Cool | Cool | Refreshing | Refreshing | Warm | Warm | Tropical | Tropical | Warm | Warm | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 19 | Cool |
| Feb | 19 | Cool |
| Mar | 20 | Refreshing |
| Apr | 23 | Refreshing |
| May | 25 | Warm |
| Jun | 27 | Warm |
| Jul | 28 | Tropical |
| Aug | 28 | Tropical |
| Sep | 27 | Warm |
| Oct | 25 | Warm |
| Nov | 23 | Refreshing |
| Dec | 21 | Refreshing |
UV index in Sanzhi in Fall
Clear-sky midday UV across fall averages around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Sanzhi peaks around June 18 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 5 | 7 | 9 | 8 | 10 | 12 | 11 | 9 | 11 | 8 | 7 | 4 |
| Level | Moderate | Very high | Very high | Very high | Extreme | Extreme | Extreme | Very high | Extreme | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 5 | Moderate |
| Feb | 7 | Very high |
| Mar | 9 | Very high |
| Apr | 8 | Very high |
| May | 10 | Extreme |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 9 | Very high |
| Sep | 11 | Extreme |
| Oct | 8 | Very high |
| Nov | 7 | High |
| Dec | 4 | Moderate |
Air quality in Sanzhi 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 Sanzhi is worst in April — around 47 µg/m³ PM2.5 (poor), about 2.3× the cleanest month (October, 20 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) | 29 | 36 | 44 | 47 | 42 | 42 | 34 | 28 | 24 | 20 | 25 | 25 |
| Level | Moderate | Poor | Poor | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 29 | Moderate |
| Feb | 36 | Poor |
| Mar | 44 | Poor |
| Apr | 47 | Poor |
| May | 42 | Poor |
| Jun | 42 | Poor |
| Jul | 34 | Moderate |
| Aug | 28 | Moderate |
| Sep | 24 | Moderate |
| Oct | 20 | Moderate |
| Nov | 25 | Moderate |
| Dec | 25 | Moderate |
Where is Sanzhi?
Sanzhi sits at 25.3°N, 121.5°E, 72 m above sea level, in Taiwan. The nearest listed city is Danshui, 11 km away.
Topography around Sanzhi
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sanzhi.
Within 3 km, the terrain around Sanzhi has significant variations in elevation — a maximum elevation change of 300 m around an average of 82 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,106 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,425 m.
The land around Sanzhi is covered by trees (77%) within 3 km, water (56%) and trees (38%) within 16 km, and water (62%) and trees (30%) within 80 km.
Taiwan travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 110 / 220 V · 60 Hz
- Happiness
- 6.7 / 10
- World Happiness, 2025
- 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 Sanzhi (25.2578°, 121.5018°, elevation 72 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.