Erlin weather in September

In September, Erlin sees average daytime highs of 28°C and overnight lows near 26°C, with 130 mm of rain across 10.2 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 28°C through the month. The sky is clear or mostly clear about 41% 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 Erlin's 8th-clearest and 8th-windiest month. For the whole year in context, see Erlin's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
26°
10th coldest
Rainfall
130 mm
10.2 wet days
Daylight
12 h 06 min
5:49 AM – 5:57 PM
Cloud cover
53%
8th clearest
Wind
19 km/h
8th windiest
Solar energy
5.14 kWh/m²
Travel score
6.3
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical September day in Erlin reaches about 28°C in the afternoon and slips back to 26°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, September runs on par with August and about 2°C warmer than October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12826
22826
32826
42826
52826
62826
72826
82826
92826
102826
112826
122826
132826
142826
152826
162826
172826
182826
192826
202826
212826
222826
232726
242726
252726
262726
272725
282725
292725
302725

How September really feels in Erlin

Once humidity and wind are folded in, September averages 15 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
15
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.

Erlin 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
Jan18° / 16°465.510.76.9
Feb18° / 16°697.611.26.5
Mar21° / 18°11010.211.86.7
Apr24° / 22°15910.912.56.8
May26° / 24°27514.113.16.0
Jun28° / 26°36117.613.44.8
Jul29° / 27°2351713.34.6
Aug29° / 26°30919.112.84.5
Sep28° / 26°13010.212.16.3
Oct26° / 24°383.111.48.3
Nov23° / 21°383.310.88.4
Dec20° / 18°464.610.67.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 44%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24357
34456
44555
54654
64852
74852
84951
95149
105248
115347
125545
135644
145743
155842
165842
175941
185941
196040
206139
216238
226238
236337
246337
256436
266535
276634
286733
296733
306931

Chance of precipitation in September

Any precipitation

Erlin gets around 130 mm of rain over 10.2 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 34% and peaks near 56% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
156
254
353
451
549
647
745
843
941
1039
1137
1235
1334
1432
1531
1629
1728
1827
1927
2026
2125
2225
2325
2424
2524
2623
2723
2822
2921
3021

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 59% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1011584
2011683
3011881
4011980
5022078
6022276
7032374
8032473
9042571
10052570
11062668
12072766
13082864
14092863
150102961
160113059
170123157
181123354
191133452
201133551
211133749
221143847
231144045
242144143
252144241
262154340
273154438
283154536
293154635
304164733

Wind in September

Winds average 19 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 24 km/h at its breeziest. Calmer and breezier days trade off through the month.

0102030151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1017light breeze
1117light breeze
1217light breeze
1318light breeze
1418light breeze
1519light breeze
1619light breeze
1719light breeze
1820light breeze
1920breezy
2021breezy
2121breezy
2221breezy
2322breezy
2422breezy
2523breezy
2623breezy
2723breezy
2824breezy
2924breezy
3024breezy

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 5:44 AM to 5:54 AM, and sunset from 6:13 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:446:13
212.55:446:12
312.45:446:11
412.45:456:10
512.45:456:09
612.45:456:08
712.35:466:07
812.35:466:06
912.35:466:05
1012.35:476:03
1112.35:476:02
1212.25:476:01
1312.25:486:00
1412.25:485:59
1512.25:485:58
1612.15:495:57
1712.15:495:56
1812.15:495:55
1912.15:505:54
2012.05:505:53
2112.05:505:52
2212.05:515:50
2312.05:515:49
2411.95:525:48
2511.95:525:47
2611.95:525:46
2711.95:535:45
2811.95:535:44
2911.85:535:43
3011.85:545:42

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.14 kWh/m².

For context, solar energy here swings from a low near 3.42 kWh/m² to a high of 5.71 kWh/m² in July across the year — September's 5.14 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
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.1Bright
225.1Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
Planning a trip in September

Hazard calendar for Erlin

In seasonPeak

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

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

Erlin's monsoon runs May–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 Erlin?

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

6.3
Sightseeing
8th-best month of the year
6.8
Beach & pool
2nd-best month of the year

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

What to pack for Erlin in September

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

In September, Erlin sees daytime highs around 28°C and nights near 26°C. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Erlin 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 25 km away) is warmest in August at about 29°C and coldest in January near 21°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
Jan21Refreshing
Feb21Refreshing
Mar22Refreshing
Apr24Warm
May26Warm
Jun28Warm
Jul29Tropical
Aug29Tropical
Sep28Warm
Oct26Warm
Nov25Warm
Dec22Refreshing

UV index in Erlin 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 Erlin 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 Erlin 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 Erlin is worst in March — around 38 µg/m³ PM2.5 (poor), about 1.8× the cleanest month (July, 21 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMar 2038 µg/m³Jul 2321 µg/m³
PM2.5 (µg/m³)Level
Jan30Moderate
Feb34Moderate
Mar38Poor
Apr37Poor
May31Moderate
Jun25Moderate
Jul21Moderate
Aug22Moderate
Sep26Moderate
Oct26Moderate
Nov26Moderate
Dec26Moderate
Location & terrain

Where is Erlin?

Erlin sits at 23.9°N, 120.4°E, 19 m above sea level, in Taiwan. The nearest listed city is Pitou, 11 km away.

Topography around Erlin

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

Within 3 km, the terrain around Erlin has only modest variations in elevation — a maximum elevation change of 18 m around an average of 12 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 51 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,887 m.

The land around Erlin is covered by cropland (62%) and artificial surfaces (23%) within 3 km, cropland (42%) and water (28%) within 16 km, and trees (39%) and water (39%) within 80 km.

3 km
18 m
16 km
51 m
80 km
3,887 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Pitou 11 km · Xihu 13 km · Xiluo 15 km · Erlun 15 km · Tianwei 16 km · Beidou 16 km · Yongjing 18 km · Citong 21 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 Erlin (23.9005°, 120.3689°, elevation 19 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).