Neili weather in September

In September, Neili sees average daytime highs of 29°C and overnight lows near 25°C, with 180 mm of rain across 12.6 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 2nd-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 Neili's 3rd-clearest and 7th-windiest month. For the whole year in context, see Neili's year-round climate.

Daytime high
29°
4th warmest
Overnight low
25°
9th coldest
Rainfall
180 mm
12.6 wet days
Daylight
12 h 06 min
5:45 AM – 5:54 PM
Cloud cover
58%
3rd clearest
Wind
14 km/h
7th windiest
Solar energy
4.71 kWh/m²
Travel score
5.2
out of 10

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 Neili reaches about 29°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 26°C and 32°C. Set against its neighbours, September runs about 2°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
73025
83025
93025
103025
113025
123025
132925
142925
152925
162925
172925
182924
192924
202924
212924
222924
232924
242824
252824
262824
272824
282824
292824
302824

How September really feels in Neili

Once humidity and wind are folded in, September averages 17 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
17
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.

Neili weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan18° / 13°7011.710.65.5
Feb18° / 14°8510.411.15.7
Mar21° / 16°1021311.85.9
Apr24° / 19°10611.912.66.4
May27° / 22°1401313.25.8
Jun30° / 25°14312.513.54.5
Jul31° / 26°14112.613.44.0
Aug31° / 26°2251612.94.0
Sep29° / 25°18012.612.25.2
Oct26° / 22°1028.511.46.9
Nov23° / 19°679.310.86.9
Dec20° / 15°6610.310.56.2

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 (%)
14258
24258
34357
44357
54357
64456
74555
84753
94753
104951
115050
125149
135248
145248
155347
165347
175347
185347
195446
205446
215446
225446
235545
245545
255545
265545
275545
285446
295446
305446

Chance of precipitation in September

Any precipitation

Neili gets around 180 mm of rain over 12.6 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 50% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
150
250
349
449
549
648
747
847
946
1045
1144
1243
1342
1441
1540
1640
1739
1838
1938
2037
2137
2236
2336
2435
2535
2635
2735
2834
2934
3034

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
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10155638
20165637
30165835
40175933
50185932
60186130
70296029
802106127
902116126
1003126025
1104136023
1204146022
1305155921
1406165919
1506175918
1607185817
1707195816
1808205715
1908215813
2009225712
2119235611
22110235511
23110245510
2411025559
2521025558
2621125548
2721126547
2831226536
2931226536
3031326535

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
110calm
211calm
311calm
411calm
511calm
611calm
711calm
812calm
912calm
1012light breeze
1112light breeze
1213light breeze
1313light breeze
1413light breeze
1514light breeze
1614light breeze
1714light breeze
1815light breeze
1915light breeze
2015light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light 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 5:39 AM to 5:50 AM, and sunset from 6:10 PM to 5:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:396:10
212.55:406:09
312.55:406:08
412.45:406:07
512.45:416:06
612.45:416:05
712.45:426:04
812.35:426:03
912.35:426:01
1012.35:436:00
1112.35:435:59
1212.25:435:58
1312.25:445:57
1412.25:445:56
1512.25:455:55
1612.15:455:54
1712.15:455:52
1812.15:465:51
1912.15:465:50
2012.05:465:49
2112.05:475:48
2212.05:475:47
2312.05:485:46
2411.95:485:45
2511.95:485:44
2611.95:495:42
2711.95:495:41
2811.85:505:40
2911.85:505:39
3011.85:505:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.71 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.87 kWh/m² in July across the year — September's 4.71 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.7Bright
184.7Bright
194.6Bright
204.6Bright
214.6Bright
224.5Bright
234.5Bright
244.4Bright
254.4Bright
264.4Bright
274.3Bright
284.3Bright
294.2Bright
304.2Bright
Planning a trip in September

Hazard calendar for Neili

In seasonPeak

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

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

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

Is September a good time to visit Neili?

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

5.2
Sightseeing
9th-best month of the year
6.5
Beach & pool
2nd-best month of the year

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

What to pack for Neili in September

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

In September, Neili sees daytime highs around 29°C and nights near 25°C. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

Sea temperature near Neili 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 20 km away) is warmest in August at about 29°C and coldest in February near 18°C.

It's comfortable for a long swim from Mar 19 to Dec 24 — about 9.2 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb18Cool
Mar20Cool
Apr23Refreshing
May26Warm
Jun27Warm
Jul29Tropical
Aug29Tropical
Sep28Warm
Oct25Warm
Nov23Refreshing
Dec21Refreshing

UV index in Neili 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 Neili peaks around June 15 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 15UV 12Dec 21UV 5
UV index (midday)Level
Jan6High
Feb8Very high
Mar9Very high
Apr8Very high
May10Extreme
Jun12Extreme
Jul10Very high
Aug10Very high
Sep10Very high
Oct8Very high
Nov6High
Dec5High

Air quality in Neili 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 Neili is worst in April — around 52 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (October, 25 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateApr 1052 µg/m³Oct 1626 µg/m³
PM2.5 (µg/m³)Level
Jan38Poor
Feb43Poor
Mar51Poor
Apr52Poor
May44Poor
Jun41Poor
Jul32Moderate
Aug32Moderate
Sep30Moderate
Oct25Moderate
Nov32Moderate
Dec32Moderate
Location & terrain

Where is Neili?

Neili sits at 25.0°N, 121.3°E, 132 m above sea level, in Taiwan. The nearest listed city is Taoyuan, 4.0 km away.

BanqiaoNew Taipei City

Topography around Neili

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

Within 3 km, the terrain around Neili has only modest variations in elevation — a maximum elevation change of 74 m around an average of 120 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 636 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,838 m.

The land around Neili is covered by artificial surfaces (63%) and trees (21%) within 3 km, trees (47%) and artificial surfaces (33%) within 16 km, and trees (48%) and water (44%) within 80 km.

3 km
74 m
16 km
636 m
80 km
3,838 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Taoyuan 4.0 km · Bade 5.0 km · Yingge 9.0 km · Daxi 10 km · Sanxia 12 km · Shulin 16 km · Banqiao 21 km · New Taipei City 22 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 Neili (24.9725°, 121.2614°, elevation 132 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).