Hsinchu weather in September

In September, Hsinchu sees average daytime highs of 29°C and overnight lows near 24°C, with 197 mm of rain across 14.8 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 3rd-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 34% 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 Hsinchu's 7th-clearest and 7th-windiest month. For the whole year in context, see Hsinchu's year-round climate.

Daytime high
29°
4th warmest
Overnight low
24°
9th coldest
Rainfall
197 mm
14.8 wet days
Daylight
12 h 06 min
5:46 AM – 5:55 PM
Cloud cover
58%
7th clearest
Wind
12 km/h
7th windiest
Solar energy
4.89 kWh/m²
Travel score
5.0
out of 10

Hsinchu is city in northern Taiwan.

Density
4,361/km²
people per km²
Founded
1982

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 Hsinchu reaches about 29°C in the afternoon and slips back to 24°C overnight — a 5°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 1°C cooler than August and about 3°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13025
23025
33025
43025
53025
63025
72925
82925
92925
102925
112925
122925
132925
142924
152924
162924
172924
182924
192924
202924
212924
222924
232824
242824
252824
262824
272824
282823
292823
302823

How September really feels in Hsinchu

Once humidity and wind are folded in, September averages 16 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
16
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.

Hsinchu weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan18° / 13°609.810.66.1
Feb19° / 14°749.211.16.2
Mar21° / 16°9311.411.86.4
Apr25° / 20°981112.66.6
May28° / 23°14213.313.25.7
Jun30° / 25°16013.413.54.4
Jul31° / 26°20214.913.43.9
Aug30° / 26°30719.512.93.8
Sep29° / 24°19714.812.25.0
Oct26° / 22°886.611.47.3
Nov24° / 19°486.210.87.7
Dec20° / 15°517.810.56.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% 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 49%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13862
23961
33961
44060
54159
64159
74258
84357
94555
104753
114852
124852
135149
145248
155248
165347
175446
185545
195545
205545
215644
225743
235743
245743
255842
265842
275941
285941
296040
306040

Chance of precipitation in September

Any precipitation

Hsinchu gets around 197 mm of rain over 14.8 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 48% and peaks near 61% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
161
260
360
459
558
658
757
856
955
1054
1153
1252
1351
1449
1548
1647
1746
1845
1944
2043
2142
2241
2340
2440
2539
2638
2737
2836
2936
3035

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 57% of days. Sticky, muggy-or-worse air turns up on roughly 93% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100155836
200165835
300175933
400176032
500186031
600196030
700196129
8002106028
9002116027
10003126025
11003136024
12004145923
13004155922
14005165821
15006175819
16006185818
17007205617
18007215616
19008215714
20018225613
21018235612
22019235611
23019245610
2401924569
25011025559
26021025558
27021125548
28121125547
29131225527
30131225536

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 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
510calm
610calm
710calm
810calm
910calm
1011calm
1111calm
1211calm
1311calm
1412calm
1512calm
1612light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3016light 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 6:11 PM to 5:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:416:11
212.55:416:10
312.55:416:09
412.45:426:08
512.45:426:07
612.45:426:06
712.45:436:05
812.35:436:04
912.35:446:02
1012.35:446:01
1112.35:446:00
1212.25:455:59
1312.25:455:58
1412.25:455:57
1512.25:465:56
1612.15:465:55
1712.15:475:54
1812.15:475:52
1912.15:475:51
2012.05:485:50
2112.05:485:49
2212.05:485:48
2312.05:495:47
2411.95:495:46
2511.95:505:45
2611.95:505:44
2711.95:505:43
2811.85:515:41
2911.85:515:40
3011.85:525:39

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.89 kWh/m².

For context, solar energy here swings from a low near 2.7 kWh/m² to a high of 5.9 kWh/m² in July across the year — September's 4.89 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
204.8Bright
214.8Bright
224.8Bright
234.7Bright
244.7Bright
254.7Bright
264.6Bright
274.6Bright
284.6Bright
294.5Bright
304.5Bright
Planning a trip in September

Hazard calendar for Hsinchu

In seasonPeak

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

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

Hsinchu'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 Hsinchu?

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
6.2
Beach & pool
3rd-best month of the year

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

What to pack for Hsinchu in September

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

In September, Hsinchu sees daytime highs around 29°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

Sea temperature near Hsinchu 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 July at about 28°C and coldest in February near 18°C.

It's comfortable for a long swim from Mar 15 to Dec 25 — about 9.4 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan18Cool
Feb18Cool
Mar20Refreshing
Apr23Refreshing
May26Warm
Jun27Warm
Jul28Tropical
Aug28Tropical
Sep28Warm
Oct26Warm
Nov24Refreshing
Dec21Refreshing

UV index in Hsinchu in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Hsinchu peaks around June 16 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJun 16UV 12Dec 22UV 5
UV index (midday)Level
Jan5High
Feb7Very high
Mar9Very high
Apr8Very high
May10Very high
Jun12Extreme
Jul10Very high
Aug11Extreme
Sep10Very high
Oct8Very high
Nov6High
Dec5Moderate

Air quality in Hsinchu 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 Hsinchu 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 Hsinchu?

Hsinchu sits at 24.8°N, 121.0°E, 22 m above sea level, in Taiwan. The nearest listed city is Zhubei, 6.0 km away.

MiaoliDaxiBadeNeiliTaoyuan

Topography around Hsinchu

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

Within 3 km, the terrain around Hsinchu has only modest variations in elevation — a maximum elevation change of 136 m around an average of 39 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 455 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,823 m.

The land around Hsinchu is covered by artificial surfaces (57%) and trees (32%) within 3 km, trees (41%) and water (31%) within 16 km, and trees (53%) and water (35%) within 80 km.

3 km
136 m
16 km
455 m
80 km
3,823 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Zhubei 6.0 km · Toufen 14 km · Zhudong 15 km · Miaoli 30 km · Daxi 34 km · Bade 35 km · Neili 35 km · Taoyuan 39 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 Hsinchu (24.8036°, 120.9686°, elevation 22 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).