Changhua weather in September

In September, Changhua sees average daytime highs of 30°C and overnight lows near 25°C, with 144 mm of rain across 12.1 wet days and about 12.1 hours of daylight. It is the 3rd-warmest and 6th-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 33% of the time in September, and the air most often feels oppressive.

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 Changhua's 8th-clearest and 8th-windiest month. For the whole year in context, see Changhua's year-round climate.

Daytime high
30°
3rd warmest
Overnight low
25°
10th coldest
Rainfall
144 mm
12.1 wet days
Daylight
12 h 06 min
5:48 AM – 5:56 PM
Cloud cover
59%
8th clearest
Wind
10 km/h
8th windiest
Solar energy
4.88 kWh/m²
Travel score
4.7
out of 10

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 Changhua reaches about 30°C in the afternoon and slips back to 25°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°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)
13126
23125
33125
43125
53125
63025
73025
83025
93025
103025
113025
123025
133025
143025
153025
163025
173025
183025
193025
203025
213025
223025
233025
243025
253025
263025
273025
283025
293025
303024

How September really feels in Changhua

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.

Changhua weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan20° / 15°527.710.77.1
Feb21° / 15°749.111.26.7
Mar23° / 17°11511.811.86.7
Apr26° / 21°15013.112.56.2
May29° / 23°22815.613.14.9
Jun30° / 25°28718.613.53.6
Jul31° / 26°23017.513.33.5
Aug31° / 26°28719.912.83.5
Sep30° / 25°14412.112.14.7
Oct28° / 23°554.811.46.8
Nov26° / 20°435.310.87.7
Dec22° / 17°506.110.57.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% 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 49%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13664
23862
33862
43961
53961
64159
74258
84258
94456
104555
114753
124852
135050
145149
155248
165347
175446
185545
195644
205743
215743
225941
235941
246040
256139
266238
276238
286436
296436
306535

Chance of precipitation in September

Any precipitation

Changhua gets around 144 mm of rain over 12.1 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 40% and peaks near 57% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
157
256
355
453
552
651
749
847
946
1044
1143
1242
1340
1439
1538
1637
1736
1835
1934
2034
2133
2233
2332
2432
2531
2630
2730
2829
2928
3028

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 44% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1023563
2023662
3023761
4033859
5033958
6043957
7143956
8153955
9163954
10173953
11184051
12194050
131104049
141114147
151124146
161134244
171144342
181154540
191154638
202164736
212164834
222164932
233165031
243165229
254165228
264165327
275155426
286155425
297155424
307155523

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
1310calm
1410calm
1510calm
1610calm
1710calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2412calm
2512calm
2612calm
2712light breeze
2812light breeze
2912light breeze
3013light 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 5:43 AM to 5:53 AM, and sunset from 6:12 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:436:12
212.55:436:11
312.45:436:10
412.45:446:09
512.45:446:08
612.45:456:07
712.45:456:06
812.35:456:05
912.35:466:04
1012.35:466:03
1112.35:466:02
1212.25:476:01
1312.25:476:00
1412.25:475:58
1512.25:485:57
1612.15:485:56
1712.15:485:55
1812.15:495:54
1912.15:495:53
2012.05:495:52
2112.05:505:51
2212.05:505:50
2312.05:505:49
2411.95:515:48
2511.95:515:46
2611.95:525:45
2711.95:525:44
2811.85:525:43
2911.85:535:42
3011.85:535:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.88 kWh/m².

For context, solar energy here swings from a low near 3.46 kWh/m² to a high of 5.45 kWh/m² in May across the year — September's 4.88 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Hazard calendar for Changhua

In seasonPeak

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

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

Changhua's monsoon runs April–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 Changhua?

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

4.7
Sightseeing
9th-best month of the year
6.5
Beach & pool
3rd-best month of the year

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

What to pack for Changhua in September

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

In September, Changhua sees daytime highs around 30°C and nights near 25°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

Sea temperature near Changhua 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 at the nearest coast (about 19 km away) is warmest in August at about 29°C and coldest in January near 19°C.

It's comfortable for a long swim from Feb 21 to Jan 4 — about 10.5 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb20Cool
Mar22Refreshing
Apr24Warm
May26Warm
Jun28Warm
Jul28Tropical
Aug29Tropical
Sep28Warm
Oct26Warm
Nov24Warm
Dec21Refreshing

UV index in Changhua in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Changhua peaks around June 18 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJun 18UV 12Dec 20UV 5
UV index (midday)Level
Jan6High
Feb8Very high
Mar9Very high
Apr8Very high
May10Very high
Jun12Extreme
Jul11Extreme
Aug11Extreme
Sep9Very high
Oct7Very high
Nov7High
Dec5High

Air quality in Changhua 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 Changhua is worst in March — around 56 µg/m³ PM2.5 (unhealthy), about 1.7× the cleanest month (July, 33 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorMar 1855 µg/m³Jul 1133 µg/m³
PM2.5 (µg/m³)Level
Jan45Poor
Feb48Poor
Mar56Unhealthy
Apr50Poor
May41Poor
Jun34Moderate
Jul33Moderate
Aug36Poor
Sep41Poor
Oct38Poor
Nov41Poor
Dec39Poor
Location & terrain

Where is Changhua?

Changhua sits at 24.1°N, 120.6°E, 28 m above sea level, in Taiwan. The nearest listed city is Chang-hua, 1.0 km away.

Topography around Changhua

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

Within 3 km, the terrain around Changhua has only modest variations in elevation — a maximum elevation change of 155 m around an average of 46 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 397 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,887 m.

The land around Changhua is covered by artificial surfaces (51%) and trees (38%) within 3 km, artificial surfaces (38%), cropland (30%) and trees (22%) within 16 km, and trees (49%) and water (30%) within 80 km.

3 km
155 m
16 km
397 m
80 km
3,887 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Chang-hua 1.0 km · Yuanlin 13 km · Xihu 14 km · Wufeng 15 km · Buzi 16 km · Taichung 16 km · Yongjing 16 km · Caotun 17 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 Changhua (24.0692°, 120.5512°, elevation 28 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).