Guiyang weather in September

In September, Guiyang sees average daytime highs of 24°C and overnight lows near 17°C, with 101 mm of rain across 12.4 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 22°C by the end. The sky is clear or mostly clear about 19% of the time in September, and the air most often feels humid.

Daylight stretches from about 12 h 36 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Guiyang's 1st-clearest and 8th-windiest month. For the whole year in context, see Guiyang's year-round climate.

Daytime high
24°
4th warmest
Overnight low
17°
9th coldest
Rainfall
101 mm
12.4 wet days
Daylight
12 h 12 min
6:43 AM – 6:52 PM
Cloud cover
69%
1st clearest
Wind
11 km/h
8th windiest
Solar energy
3.8 kWh/m²
Travel score
6.2
out of 10

Guiyang is capital of Guizhou province, China.

Air quality
High
PM2.5 31.7 µg/m³ · 2018
Density
378/km²
people per km²

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 26°C in the first days to 22°C by the end.

A typical September day in Guiyang reaches about 24°C in the afternoon and slips back to 17°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 29°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12619
22619
32619
42618
52618
62618
72618
82618
92518
102518
112518
122518
132517
142517
152517
162417
172417
182417
192417
202417
212416
222316
232316
242316
252316
262316
272316
282215
292215
302215

How September really feels in Guiyang

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Guiyang weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6714.43.710.51.1
Feb11° / 6013.71.811.12.2
Mar15° / 97190.311.83.5
Apr20° / 12°130190.112.64.7
May23° / 16°19119.3013.35.2
Jun25° / 19°23920.7013.64.8
Jul27° / 21°16817.7013.55.0
Aug27° / 20°12415.7012.95.4
Sep24° / 17°10112.4012.26.2
Oct19° / 13°10514.1011.45.4
Nov15° / 6311.50.110.74.3
Dec10° / 4811.61.210.42.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13367
23367
33466
43466
53466
63466
73466
83466
93466
103565
113466
123565
133466
143367
153466
163268
173367
183268
193268
203169
213169
223169
233169
243169
253169
262971
272971
282971
292971
303070

Chance of precipitation in September

Any precipitation

Guiyang gets around 101 mm of rain over 12.4 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 42% and peaks near 43% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
143
243
343
443
543
643
743
843
943
1043
1143
1243
1343
1443
1542
1642
1742
1841
1941
2041
2140
2240
2340
2440
2539
2639
2739
2839
2940
3040

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the humid band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 25% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13163645
23163744
34173742
44183840
55183839
65193937
76193936
86203935
97203933
108204032
119214031
129213930
1310223928
1411223927
1513233926
1614243824
1715243823
1816253721
1918263720
2019263619
2120273617
2221273516
2323283515
2424283414
2526283312
2627293211
2729293110
2831293010
293230299
303430288

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 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
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 36 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 48 minutes over September. Sunrise moves from 6:36 AM to 6:49 AM, and sunset from 7:09 PM to 6:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:367:09
212.56:377:08
312.56:377:07
412.56:387:06
512.46:387:05
612.46:397:04
712.46:397:03
812.46:397:01
912.36:407:00
1012.36:406:59
1112.36:416:58
1212.36:416:57
1312.26:426:56
1412.26:426:54
1512.26:426:53
1612.26:436:52
1712.16:436:51
1812.16:446:50
1912.16:446:49
2012.06:456:47
2112.06:456:46
2212.06:456:45
2312.06:466:44
2411.96:466:43
2511.96:476:42
2611.96:476:40
2711.96:486:39
2811.86:486:38
2911.86:496:37
3011.86:496:36

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.8 kWh/m².

For context, solar energy here swings from a low near 1.86 kWh/m² to a high of 4.73 kWh/m² in August across the year — September's 3.8 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.3Bright
34.3Bright
44.3Bright
54.2Bright
64.2Bright
74.1Bright
84.1Bright
94.0Bright
104.0Bright
114.0Moderate
123.9Moderate
133.9Moderate
143.9Moderate
153.8Moderate
163.8Moderate
173.7Moderate
183.7Moderate
193.6Moderate
203.6Moderate
213.6Moderate
223.5Moderate
233.5Moderate
243.5Moderate
253.4Moderate
263.4Moderate
273.3Moderate
283.3Moderate
293.2Moderate
303.2Moderate
Planning a trip in September

Hazard calendar for Guiyang

In seasonPeak

None of Guiyang's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Guiyang's rainy season runs April–August, when most of the year's rain falls.

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

Is September a good time to visit Guiyang?

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

6.2
Sightseeing
1st-best month of the year
5.3
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Guiyang for sightseeing.

What to pack for Guiyang in September

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

In September, Guiyang sees daytime highs around 24°C and nights near 17°C. Worth packing: light clothes and rain gear. About 12 days see rain.

light clothesrain gear

UV index in Guiyang 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 Guiyang peaks around July 13 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 highHighJul 13UV 12Dec 20UV 5
UV index (midday)Level
Jan5High
Feb7Very high
Mar9Very high
Apr9Very high
May10Very high
Jun12Extreme
Jul13Extreme
Aug11Extreme
Sep10Very high
Oct8Very high
Nov6High
Dec5Moderate

Air quality in Guiyang 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 Guiyang is worst in March — around 37 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Guiyang's WHO annual average of 31.7 µg/m³.

010203040JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMar 1737 µg/m³Jul 1625 µg/m³
PM2.5 (µg/m³)Level
Jan32Moderate
Feb35Poor
Mar37Poor
Apr35Poor
May32Moderate
Jun27Moderate
Jul24Moderate
Aug28Moderate
Sep30Moderate
Oct31Moderate
Nov34Moderate
Dec34Moderate
Location & terrain

Where is Guiyang?

Guiyang sits at 26.6°N, 106.7°E, 1,087 m above sea level, in China. The nearest listed city is Fenghuang, 322 km away.

ChongqingGuilinThị Trấn Trùng KhánhYangshuoThị Trấn Nước HaiKunmingCao Bằng

Topography around Guiyang

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

Within 3 km, the terrain around Guiyang has only modest variations in elevation — a maximum elevation change of 243 m around an average of 1,105 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 487 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,342 m.

The land around Guiyang is covered by artificial surfaces (68%) and trees (25%) within 3 km, trees (46%) and artificial surfaces (26%) within 16 km, and trees (68%) within 80 km.

3 km
243 m
16 km
487 m
80 km
1,342 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Fenghuang 322 km · Chongqing 331 km · Guilin 386 km · Thị Trấn Trùng Khánh 417 km · Yangshuo 428 km · Thị Trấn Nước Hai 431 km · Kunming 435 km · Cao Bằng 438 km

China travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / I
220 V · 50 Hz
Prices
≈ 47% of US
price level, 2025
GDP per capita
$13,862
2025
Happiness
6.1 / 10
World Happiness, 2025
Homicide rate
0.5
per 100k, 2020
Road deaths
17.4
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 464
Religion
unaffiliated 52%folk religion 22%Buddhist 18%Christian 5%

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 Guiyang (26.5833°, 106.7167°, elevation 1,087 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. 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).