Miaoli weather in September

In September, Miaoli sees average daytime highs of 29°C and overnight lows near 25°C, with 182 mm of rain across 13.9 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°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 Miaoli's 7th-clearest and 9th-windiest month. For the whole year in context, see Miaoli's year-round climate.

Daytime high
29°
4th warmest
Overnight low
25°
9th coldest
Rainfall
182 mm
13.9 wet days
Daylight
12 h 06 min
5:47 AM – 5:55 PM
Cloud cover
58%
7th clearest
Wind
12 km/h
9th windiest
Solar energy
4.98 kWh/m²
Travel score
5.0
out of 10

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

Density
2,278/km²
people per km²
Founded
1981

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 29°C through the month.

A typical September day in Miaoli 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 27°C and 31°C. Set against its neighbours, September runs about 1°C cooler than August and about 2°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13025
23025
33025
43025
53025
63025
73025
82925
92925
102925
112925
122925
132925
142925
152925
162925
172925
182925
192925
202925
212925
222924
232924
242924
252924
262824
272824
282824
292824
302824

How September really feels in Miaoli

Once humidity and wind are folded in, September averages 20 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
20
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.

Miaoli weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan19° / 14°698.910.66.5
Feb19° / 15°9810.411.16.2
Mar22° / 17°13312.511.86.3
Apr25° / 20°14813.512.66.2
May28° / 23°21116.313.25.2
Jun30° / 25°25018.713.53.8
Jul31° / 26°23718.413.43.6
Aug30° / 26°32921.912.93.6
Sep29° / 25°18213.912.25.0
Oct27° / 22°705.111.47.6
Nov24° / 20°495.310.88.0
Dec21° / 16°546.810.57.3

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 17% of September, with mostly cloudy or overcast conditions the remaining 50%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23466
33466
43664
53763
63961
73862
84159
94258
104357
114555
124654
134852
145050
155149
165248
175347
185446
195545
205644
215644
225842
235941
245941
256040
266139
276139
286238
296436
306436

Chance of precipitation in September

Any precipitation

Miaoli gets around 182 mm of rain over 13.9 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 64% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
164
263
362
461
559
658
757
856
954
1053
1151
1250
1348
1447
1546
1644
1743
1841
1940
2039
2138
2237
2336
2435
2534
2634
2733
2832
2931
3030

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 47% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10054451
20054451
30064449
40174548
50174548
60184547
70184446
80194446
901104445
1001114344
1102124343
1202134342
1302144341
1402154339
1502164338
1603174436
1703184534
1803194632
1903204730
2004214827
2104214925
2204215124
2315225022
2415225220
2516225219
2617225218
2717225317
2818225316
2919215315
30210215314

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
19calm
29calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1011calm
1111calm
1211calm
1311calm
1411calm
1512calm
1612calm
1712light breeze
1812light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2715light breeze
2815light breeze
2915light breeze
3015light 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 5:41 AM to 5:52 AM, and sunset from 6:12 PM to 5:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:416:12
212.55:426:10
312.55:426:09
412.45:426:08
512.45:436:07
612.45:436:06
712.45:446:05
812.35:446:04
912.35:446:03
1012.35:456:02
1112.35:456:01
1212.25:456:00
1312.25:465:59
1412.25:465:57
1512.25:465:56
1612.15:475:55
1712.15:475:54
1812.15:485:53
1912.15:485:52
2012.05:485:51
2112.05:495:50
2212.05:495:49
2312.05:495:48
2411.95:505:46
2511.95:505:45
2611.95:515:44
2711.95:515:43
2811.85:515:42
2911.85:525:41
3011.85:525:40

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.98 kWh/m².

For context, solar energy here swings from a low near 3.05 kWh/m² to a high of 5.8 kWh/m² in July across the year — September's 4.98 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
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 Miaoli

In seasonPeak

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

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

Miaoli's rainy season runs May–September, when most of the year's rain falls.

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

Is September a good time to visit Miaoli?

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

5.0
Sightseeing
9th-best month of the year
6.3
Beach & pool
3rd-best month of the year

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

What to pack for Miaoli in September

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

In September, Miaoli 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 Miaoli 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 21 km away) is warmest in August at about 28°C and coldest in February near 18°C.

It's comfortable for a long swim from Mar 8 to Dec 26 — about 9.7 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb18Cool
Mar21Refreshing
Apr23Refreshing
May26Warm
Jun27Warm
Jul28Tropical
Aug28Tropical
Sep28Warm
Oct26Warm
Nov24Refreshing
Dec21Refreshing

UV index in Miaoli 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 Miaoli peaks around June 16 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 16UV 12Dec 21UV 6
UV index (midday)Level
Jan6High
Feb8Very high
Mar10Very high
Apr9Very high
May11Extreme
Jun13Extreme
Jul10Extreme
Aug12Extreme
Sep9Very high
Oct7Very high
Nov7High
Dec6High

Air quality in Miaoli 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 Miaoli is worst in March — around 45 µg/m³ PM2.5 (poor), about 1.7× the cleanest month (October, 26 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateMar 2145 µg/m³Oct 1727 µg/m³
PM2.5 (µg/m³)Level
Jan33Moderate
Feb40Poor
Mar45Poor
Apr44Poor
May37Poor
Jun30Moderate
Jul27Moderate
Aug28Moderate
Sep29Moderate
Oct26Moderate
Nov29Moderate
Dec29Moderate
Location & terrain

Where is Miaoli?

Miaoli sits at 24.6°N, 120.8°E, 53 m above sea level, in Taiwan. The nearest listed city is Toufen, 16 km away.

HsinchuZhudongXizhouZhubeiBuziTaichungWufeng

Topography around Miaoli

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

Within 3 km, the terrain around Miaoli has only modest variations in elevation — a maximum elevation change of 185 m around an average of 66 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,234 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,838 m.

The land around Miaoli is covered by trees (49%) and artificial surfaces (34%) within 3 km, trees (64%) within 16 km, and trees (54%) and water (32%) within 80 km.

3 km
185 m
16 km
1,234 m
80 km
3,838 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Toufen 16 km · Hsinchu 30 km · Zhudong 33 km · Xizhou 35 km · Zhubei 36 km · Buzi 47 km · Taichung 49 km · Wufeng 57 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 Miaoli (24.5643°, 120.8237°, elevation 53 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).