Sanzhi weather in September

In September, Sanzhi sees average daytime highs of 29°C and overnight lows near 25°C, with 169 mm of rain across 14.2 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 30°C in the first days to 28°C by the end. The sky is clear or mostly clear about 32% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 30 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Sanzhi's 1st-clearest and 6th-windiest month. For the whole year in context, see Sanzhi's year-round climate.

Daytime high
29°
4th warmest
Overnight low
25°
9th coldest
Rainfall
169 mm
14.2 wet days
Daylight
12 h 06 min
5:44 AM – 5:53 PM
Cloud cover
59%
1st clearest
Wind
17 km/h
6th windiest
Solar energy
4.7 kWh/m²
Travel score
5.1
out of 10

Sanzhi is A district in New Taipei City, Taiwan.

Density
355/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 30°C in the first days to 28°C by the end.

A typical September day in Sanzhi reaches about 29°C in the afternoon and slips back to 25°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 31°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13026
23026
33026
43026
53026
63026
73026
83026
93026
102926
112926
122926
132926
142926
152926
162925
172925
182925
192925
202825
212825
222825
232825
242825
252825
262825
272825
282824
292724
302724

How September really feels in Sanzhi

Once humidity and wind are folded in, September averages 18 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
18
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Sanzhi weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan18° / 14°781310.65.1
Feb18° / 14°9612.611.15.2
Mar20° / 16°11314.311.85.5
Apr24° / 19°12013.312.66.1
May27° / 23°15713.713.25.8
Jun29° / 25°15813.413.54.5
Jul31° / 27°1111113.44.3
Aug31° / 27°18714.312.94.2
Sep29° / 25°16914.212.25.1
Oct26° / 23°1301211.46.4
Nov23° / 20°10012.610.86.2
Dec20° / 16°8312.910.55.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 51%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14654
24654
34654
44753
54753
64753
74753
84951
94951
104951
115050
125149
135149
145149
155149
165149
175149
185050
195050
205149
215149
225149
235149
245149
255050
265050
275050
285050
294852
304753

Chance of precipitation in September

Any precipitation

Sanzhi gets around 169 mm of rain over 14.2 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 46% and peaks near 49% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
148
248
348
449
549
649
749
849
949
1048
1148
1248
1347
1447
1546
1646
1746
1846
1945
2045
2145
2245
2344
2444
2544
2644
2744
2844
2944
3044

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the miserable band about 42% of days. Sticky, muggy-or-worse air turns up on roughly 94% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10052669
20152767
30162964
40163063
50173161
60173260
70183259
80183358
90193456
1002103454
1102103553
1203113650
1304123648
1404133746
1505143843
1605153841
1706163939
1807174036
1907184134
2008194231
2108194329
2219204327
2319214425
2419214524
25110224522
26110224521
27211234520
28211234519
29212234518
30213234517

Wind in September

Winds average 17 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1216light breeze
1316light breeze
1416light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2920light breeze
3020light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 30 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over September. Sunrise moves from 5:38 AM to 5:50 AM, and sunset from 6:09 PM to 5:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:386:09
212.55:396:08
312.55:396:07
412.45:396:06
512.45:406:05
612.45:406:04
712.45:406:03
812.35:416:02
912.35:416:01
1012.35:425:59
1112.35:425:58
1212.25:425:57
1312.25:435:56
1412.25:435:55
1512.25:445:54
1612.15:445:53
1712.15:445:52
1812.15:455:50
1912.15:455:49
2012.05:455:48
2112.05:465:47
2212.05:465:46
2312.05:475:45
2411.95:475:44
2511.95:475:43
2611.95:485:41
2711.95:485:40
2811.85:495:39
2911.85:495:38
3011.85:505:37

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.7 kWh/m².

For context, solar energy here swings from a low near 2.13 kWh/m² to a high of 6 kWh/m² in July across the year — September's 4.7 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
104.9Bright
114.9Bright
124.9Bright
134.8Bright
144.8Bright
154.8Bright
164.7Bright
174.7Bright
184.7Bright
194.6Bright
204.6Bright
214.5Bright
224.5Bright
234.4Bright
244.4Bright
254.3Bright
264.3Bright
274.3Bright
284.2Bright
294.2Bright
304.1Bright
Planning a trip in September

Hazard calendar for Sanzhi

In seasonPeak

In September, Sanzhi sits inside 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.

Pacific typhoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Sanzhi?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.1
Sightseeing
8th-best month of the year
6.2
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Sanzhi for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Sanzhi in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Sanzhi sees daytime highs around 29°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 14 days see rain.

light clothesrain gearsun protection

Sea temperature near Sanzhi in September

The nearest coast averages about 27°C in September — 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.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb19Cool
Mar20Refreshing
Apr23Refreshing
May25Warm
Jun27Warm
Jul28Tropical
Aug28Tropical
Sep27Warm
Oct25Warm
Nov23Refreshing
Dec21Refreshing

UV index in Sanzhi in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highVery highHighJun 18UV 11Dec 22UV 4
UV index (midday)Level
Jan5Moderate
Feb7Very high
Mar9Very high
Apr8Very high
May10Extreme
Jun12Extreme
Jul11Extreme
Aug9Very high
Sep11Extreme
Oct8Very high
Nov7High
Dec4Moderate

Air quality in Sanzhi in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September 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).

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateApr 1447 µg/m³Oct 1521 µg/m³
PM2.5 (µg/m³)Level
Jan29Moderate
Feb36Poor
Mar44Poor
Apr47Poor
May42Poor
Jun42Poor
Jul34Moderate
Aug28Moderate
Sep24Moderate
Oct20Moderate
Nov25Moderate
Dec25Moderate
Location & terrain

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.

NeihuNew Taipei CityTaipeiXizhiBanqiaoKeelungShulin

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.

3 km
300 m
16 km
1,106 m
80 km
2,425 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Danshui 11 km · Neihu 21 km · New Taipei City 22 km · Taipei 23 km · Xizhi 27 km · Banqiao 27 km · Keelung 28 km · Shulin 31 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
Buddhist 35%Taoist 33%none or unspecified 18%folk religion approximately 10%

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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).