Hualien weather in September

In September, Hualien sees average daytime highs of 25°C and overnight lows near 19°C, with 469 mm of rain across 22.9 wet days and about 12.1 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 24°C by the end. The sky is clear or mostly clear about 12% of the time in September, and the air most often feels muggy.

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 Hualien's 3rd-clearest and 4th-windiest month. For the whole year in context, see Hualien's year-round climate.

Daytime high
25°
4th warmest
Overnight low
19°
10th coldest
Rainfall
469 mm
22.9 wet days
Daylight
12 h 06 min
5:44 AM – 5:52 PM
Cloud cover
76%
3rd clearest
Wind
4 km/h
4th windiest
Solar energy
4.54 kWh/m²
Travel score
4.6
out of 10

Hualien is A county-administered city in Hualien County, Taiwan.

Density
3,382/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 26°C in the first days to 24°C by the end.

A typical September day in Hualien reaches about 25°C in the afternoon and slips back to 19°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 27°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12620
22620
32620
42620
52620
62620
72620
82620
92620
102520
112520
122520
132520
142520
152519
162519
172519
182519
192519
202519
212519
222419
232419
242419
252419
262419
272419
282419
292419
302419

Hualien weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan15° / 10°40629.610.72.4
Feb16° / 10°38125.911.22.7
Mar18° / 12°33527.611.83.4
Apr21° / 15°27926.512.53.8
May23° / 17°37129.113.13.8
Jun26° / 19°33725.713.53.9
Jul27° / 20°29421.613.34.6
Aug27° / 20°35322.912.84.6
Sep25° / 19°46922.912.14.6
Oct22° / 17°34423.511.44.5
Nov19° / 14°26924.610.83.9
Dec16° / 11°33128.310.52.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 75%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12971
22971
32674
42674
52773
62674
72674
82674
92674
102773
112674
122773
132773
142674
152674
162575
172476
182476
192377
202278
212278
222278
232278
242179
252179
262278
272278
282179
292278
302278

Chance of precipitation in September

Any precipitation

Hualien gets around 469 mm of rain over 22.9 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 76% and peaks near 78% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
175
275
376
476
575
675
775
875
974
1074
1174
1274
1374
1474
1574
1674
1775
1875
1976
2076
2177
2277
2377
2477
2578
2678
2778
2877
2977
3077

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 77% of days. Sticky, muggy-or-worse air turns up on roughly 78% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
105923
206913
306913
407912
507912
608902
708911
809901
9010891
10011881
11012871
12014851
13016831
14017821
15019801
16021781
17023761
18024760
19026740
20028720
21129700
22130690
23132670
24133660
25234640
26236620
27237610
28338590
29340570
30441550

Wind in September

Winds average 4 km/h in September.

Across September, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

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 5:39 AM to 5:49 AM, and sunset from 6:08 PM to 5:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:396:08
212.55:396:07
312.45:396:06
412.45:406:05
512.45:406:04
612.45:406:03
712.45:416:02
812.35:416:01
912.35:416:00
1012.35:425:59
1112.35:425:57
1212.25:425:56
1312.25:435:55
1412.25:435:54
1512.25:435:53
1612.15:445:52
1712.15:445:51
1812.15:445:50
1912.15:455:49
2012.05:455:48
2112.05:465:47
2212.05:465:46
2312.05:465:44
2411.95:475:43
2511.95:475:42
2611.95:475:41
2711.95:485:40
2811.95:485:39
2911.85:485:38
3011.85:495:37

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.54 kWh/m².

For context, solar energy here swings from a low near 2.11 kWh/m² to a high of 5.81 kWh/m² in July across the year — September's 4.54 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
15.0Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.7Bright
134.7Bright
144.7Bright
154.6Bright
164.6Bright
174.5Bright
184.5Bright
194.5Bright
204.4Bright
214.3Bright
224.3Bright
234.3Bright
244.2Bright
254.2Bright
264.2Bright
274.1Bright
284.1Bright
294.1Bright
304.0Bright
Planning a trip in September

Hazard calendar for Hualien

In seasonPeak

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

Hualien 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 Hualien?

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

4.6
Sightseeing
1st-best month of the year
4.2
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Hualien for sightseeing.

What to pack for Hualien in September

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

In September, Hualien sees daytime highs around 25°C and nights near 19°C. Pack rain gear. Worth having: light clothes and sun protection. About 23 days see rain.

rain gearlight clothessun protection

Sea temperature near Hualien in September

The nearest coast averages about 28°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August 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
Mar25Warm
Apr26Warm
May27Warm
Jun28Tropical
Jul29Tropical
Aug29Tropical
Sep28Tropical
Oct27Warm
Nov26Warm
Dec25Warm

UV index in Hualien 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 Hualien peaks around June 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 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 21UV 12Dec 19UV 6
UV index (midday)Level
Jan6High
Feb8Very high
Mar10Very high
Apr8Very high
May10Very high
Jun13Extreme
Jul12Extreme
Aug11Extreme
Sep11Extreme
Oct9Very high
Nov7Very high
Dec6High

Air quality in Hualien 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 Hualien is worst in March — around 22 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateMar 2422 µg/m³Oct 1811 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb17Moderate
Mar22Moderate
Apr22Moderate
May17Moderate
Jun15Moderate
Jul11Good
Aug12Good
Sep11Good
Oct11Good
Nov11Good
Dec13Moderate
Location & terrain

Where is Hualien?

Hualien sits at 24.0°N, 121.6°E, 13 m above sea level, in Taiwan. The nearest listed city is Xiulin, 16 km away.

PuliYilanLuguWufengCaotunZhongxing New VillageTaichung

Topography around Hualien

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

Within 3 km, the terrain around Hualien has only modest variations in elevation — a maximum elevation change of 101 m around an average of 16 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,378 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,837 m.

The land around Hualien is covered by artificial surfaces (44%), trees (27%) and water (22%) within 3 km, water (46%) and trees (45%) within 16 km, and trees (66%) and water (31%) within 80 km.

3 km
101 m
16 km
2,378 m
80 km
3,837 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Xiulin 16 km · Puli 65 km · Yilan 88 km · Lugu 90 km · Wufeng 93 km · Caotun 93 km · Zhongxing New Village 93 km · Taichung 95 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 Hualien (23.9769°, 121.6044°, elevation 13 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).