Kaohsiung weather in September

In September, Kaohsiung sees average daytime highs of 30°C and overnight lows near 26°C, with 189 mm of rain across 16.7 wet days and about 12.1 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 27% 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 Kaohsiung's 8th-clearest and 9th-windiest month. For the whole year in context, see Kaohsiung's year-round climate.

Daytime high
30°
3rd warmest
Overnight low
26°
9th coldest
Rainfall
189 mm
16.7 wet days
Daylight
12 h 06 min
5:49 AM – 5:57 PM
Cloud cover
64%
8th clearest
Wind
10 km/h
9th windiest
Solar energy
5.13 kWh/m²
Travel score
4.1
out of 10

Kaohsiung is city in southern Taiwan.

Density
927/km²
people per km²
Founded
2010

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Kaohsiung reaches about 30°C in the afternoon and slips back to 26°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, September runs on par with August and about 2°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13027
23027
33027
43027
53027
63027
73027
83027
93026
103026
113026
123026
133026
143026
153026
163026
173026
183026
193026
203026
213026
223026
233026
243026
253026
263026
273026
283026
293026
303026

How September really feels in Kaohsiung

Once humidity and wind are folded in, September averages 30 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
30
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.

Kaohsiung weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 18°355.910.87.6
Feb24° / 18°26611.27.6
Mar26° / 21°367.311.87.2
Apr28° / 23°821012.56.2
May29° / 26°23217.313.14.4
Jun30° / 27°33820.513.43.5
Jul31° / 27°27519.713.23.5
Aug30° / 27°36321.212.83.5
Sep30° / 26°18916.712.14.1
Oct29° / 25°8011.611.55.6
Nov27° / 22°588.110.97.0
Dec24° / 19°405.610.67.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13466
23565
33664
43664
53862
63862
74060
84159
94159
104456
114456
124555
134753
144753
154852
164852
174852
184852
195050
205050
215050
225149
235347
245347
255446
265545
275545
285644
295644
305743

Chance of precipitation in September

Any precipitation

Kaohsiung gets around 189 mm of rain over 16.7 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 56% and peaks near 66% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
166
265
364
464
563
662
761
860
959
1058
1157
1256
1356
1455
1555
1655
1755
1855
1954
2054
2154
2253
2352
2452
2551
2650
2749
2848
2947
3047

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 70% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
10991
211089
311188
411287
511287
611386
711485
811683
911782
1011881
1122078
1222177
1322375
1422474
1522672
1622870
1723068
1823167
1923365
2023563
2133661
2233859
2333958
2444056
2544155
2654253
2764351
2864351
2974449
3074548

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
269calm
279calm
289calm
299calm
309calm

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 5:45 AM to 5:54 AM, and sunset from 6:12 PM to 5:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:456:12
212.45:456:11
312.45:456:10
412.45:466:09
512.45:466:08
612.45:466:07
712.35:476:06
812.35:476:05
912.35:476:04
1012.35:476:03
1112.25:486:02
1212.25:486:01
1312.25:486:00
1412.25:495:59
1512.25:495:58
1612.15:495:57
1712.15:505:56
1812.15:505:55
1912.15:505:54
2012.05:505:53
2112.05:515:52
2212.05:515:51
2312.05:515:50
2411.95:525:49
2511.95:525:48
2611.95:525:47
2711.95:535:46
2811.95:535:45
2911.85:535:44
3011.85:545:43

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.13 kWh/m².

For context, solar energy here swings from a low near 3.23 kWh/m² to a high of 5.62 kWh/m² in July across the year — September's 5.13 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
294.9Bright
304.9Bright
Planning a trip in September

Hazard calendar for Kaohsiung

In seasonPeak

In September, Kaohsiung sits inside its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.

Kaohsiung sits in the Pacific typhoon belt; the season peaks July–October.

Kaohsiung's monsoon runs May–September, when most of the year's rain falls.

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

Is September a good time to visit Kaohsiung?

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

4.1
Sightseeing
9th-best month of the year
5.7
Beach & pool
9th-best month of the year

September is a reasonable time to visit Kaohsiung for sightseeing.

What to pack for Kaohsiung in September

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

In September, Kaohsiung sees daytime highs around 30°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 17 days see rain.

light clothesrain gearsun protection

Sea temperature near Kaohsiung in September

The nearest coast averages about 29°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 19 km away) is warmest in July at about 29°C and coldest in January near 24°C.

The water stays above 20°C all year — warm enough for a swim any month.

22°24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan24Refreshing
Feb24Refreshing
Mar24Warm
Apr26Warm
May28Warm
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct28Warm
Nov26Warm
Dec25Warm

UV index in Kaohsiung 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 Kaohsiung peaks around June 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 6 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJun 17UV 12Dec 22UV 6
UV index (midday)Level
Jan6High
Feb8Very high
Mar10Very high
Apr9Very high
May9Very high
Jun12Extreme
Jul10Very high
Aug12Extreme
Sep11Extreme
Oct8Very high
Nov7Very high
Dec6High

Air quality in Kaohsiung 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 Kaohsiung is worst in March — around 34 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (June, 14 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 1034 µg/m³Jun 2214 µg/m³
PM2.5 (µg/m³)Level
Jan33Moderate
Feb33Moderate
Mar34Moderate
Apr28Moderate
May20Moderate
Jun14Moderate
Jul15Moderate
Aug18Moderate
Sep24Moderate
Oct32Moderate
Nov32Moderate
Dec31Moderate
Location & terrain

Where is Kaohsiung?

Kaohsiung sits at 22.6°N, 120.3°E, 9 m above sea level, in Taiwan. The nearest listed city is Fengshan, 5.0 km away.

DonggangChaozhouTainanYongkangYujingXinyingHengchun

Topography around Kaohsiung

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Kaohsiung.

Within 3 km, the terrain around Kaohsiung has only modest variations in elevation — a maximum elevation change of 31 m around an average of 10 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 351 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,241 m.

The land around Kaohsiung is covered by artificial surfaces (82%) within 3 km, water (43%) and artificial surfaces (29%) within 16 km, and water (45%) and trees (43%) within 80 km.

3 km
31 m
16 km
351 m
80 km
3,241 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Fengshan 5.0 km · Donggang 22 km · Chaozhou 24 km · Tainan 43 km · Yongkang 46 km · Yujing 59 km · Xinying 77 km · Hengchun 81 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 Kaohsiung (22.6163°, 120.3133°, 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. 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).