Budai weather in September

In September, Budai sees average daytime highs of 31°C and overnight lows near 25°C, with 189 mm of rain across 12.2 wet days and about 12.1 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 26% 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 Budai's 8th-clearest and 11th-windiest month. For the whole year in context, see Budai's year-round climate.

Daytime high
31°
4th warmest
Overnight low
25°
9th coldest
Rainfall
189 mm
12.2 wet days
Daylight
12 h 06 min
5:50 AM – 5:58 PM
Cloud cover
63%
8th clearest
Wind
10 km/h
11th windiest
Solar energy
5.08 kWh/m²
Travel score
4.4
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical September day in Budai reaches about 31°C in the afternoon and slips back to 25°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 29°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)
13125
23125
33125
43125
53125
63125
73125
83125
93125
103125
113125
123125
133125
143125
153125
163125
173125
183125
193125
203125
213125
223025
233025
243024
253024
263024
273024
283024
293024
303024

How September really feels in Budai

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.

Budai weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 14°708.210.77.2
Feb22° / 15°849.511.26.9
Mar25° / 17°12111.611.86.7
Apr27° / 21°20814.212.55.7
May29° / 23°37918.513.14.3
Jun31° / 25°42921.513.43.1
Jul32° / 26°29719.613.33.2
Aug31° / 26°39721.112.83.2
Sep31° / 25°18912.212.14.4
Oct29° / 23°554.511.56.4
Nov27° / 20°52610.97.5
Dec23° / 16°706.710.67.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% 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 55%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13070
23070
33169
43268
53268
63466
73565
83664
93862
103961
114060
124357
134357
144555
154654
164753
174852
184951
195050
205149
215347
225347
235446
245545
255644
265743
275842
285842
295941
306040

Chance of precipitation in September

Any precipitation

Budai gets around 189 mm of rain over 12.2 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 41% and peaks near 63% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
163
262
360
459
557
655
753
851
950
1048
1146
1244
1343
1441
1540
1638
1737
1836
1935
2034
2133
2232
2331
2430
2529
2628
2728
2827
2926
3025

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 56% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1011980
2012079
3012178
4012277
5012376
6012475
7022573
8022771
9032869
10032968
11043066
12053263
13053362
14063460
15073657
16073756
17083953
18084151
19094249
20094447
210104545
221104743
231114841
241114939
251115038
262125036
272125234
282135233
293145231
303145429

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
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 6:13 PM to 5:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:456:13
212.55:456:12
312.45:456:11
412.45:466:10
512.45:466:09
612.45:466:08
712.35:476:07
812.35:476:06
912.35:476:05
1012.35:486:04
1112.25:486:03
1212.25:486:02
1312.25:496:01
1412.25:496:00
1512.25:495:59
1612.15:505:58
1712.15:505:57
1812.15:505:56
1912.15:515:54
2012.05:515:53
2112.05:515:52
2212.05:525:51
2312.05:525:50
2411.95:525:49
2511.95:535:48
2611.95:535:47
2711.95:535:46
2811.95:545:45
2911.85:545:44
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 5.08 kWh/m².

For context, solar energy here swings from a low near 3.63 kWh/m² to a high of 5.82 kWh/m² in April across the year — September's 5.08 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.1Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
Planning a trip in September

Hazard calendar for Budai

In seasonPeak

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

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

Budai's monsoon runs April–August, 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 Budai?

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

4.4
Sightseeing
8th-best month of the year
6.3
Beach & pool
3rd-best month of the year

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

What to pack for Budai in September

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

In September, Budai sees daytime highs around 31°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 Budai 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 29°C and coldest in January near 22°C.

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

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan22Refreshing
Feb22Refreshing
Mar23Refreshing
Apr25Warm
May27Warm
Jun28Tropical
Jul29Tropical
Aug29Tropical
Sep28Tropical
Oct27Warm
Nov25Warm
Dec23Refreshing

UV index in Budai 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 Budai peaks around June 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 20UV 6
UV index (midday)Level
Jan6High
Feb8Very high
Mar10Very high
Apr9Very high
May10Very high
Jun12Extreme
Jul11Extreme
Aug12Extreme
Sep10Very high
Oct7Very high
Nov7High
Dec5High

Air quality in Budai 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 Budai is worst in March — around 48 µg/m³ PM2.5 (poor), about 1.8× the cleanest month (July, 27 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorMar 1848 µg/m³Jul 1828 µg/m³
PM2.5 (µg/m³)Level
Jan41Poor
Feb44Poor
Mar48Poor
Apr46Poor
May38Poor
Jun30Moderate
Jul27Moderate
Aug29Moderate
Sep38Poor
Oct40Poor
Nov40Poor
Dec36Poor
Location & terrain

Where is Budai?

Budai sits at 23.4°N, 120.2°E, 7 m above sea level, in Taiwan. The nearest listed city is Xinying, 17 km away.

BeigangXingangChiayi CityYongkangYujingTainan

Topography around Budai

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

Within 3 km, the terrain around Budai has only modest variations in elevation — a maximum elevation change of 14 m around an average of 0 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 33 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,662 m.

The land around Budai is covered by water (67%) within 3 km, water (53%) and cropland (27%) within 16 km, and water (51%) and trees (29%) within 80 km.

3 km
14 m
16 km
33 m
80 km
3,662 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Xinying 17 km · Taibao 20 km · Beigang 26 km · Xingang 27 km · Chiayi City 31 km · Yongkang 40 km · Yujing 42 km · Tainan 43 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 Budai (23.3779°, 120.1615°, elevation 7 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).