Thị Trấn Phố Lu weather in September

In September, Thị Trấn Phố Lu sees average daytime highs of 29°C and overnight lows near 23°C, with 211 mm of rain across 20.5 wet days and about 12.1 hours of daylight. It is the 5th-warmest and 5th-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 21% 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 Thị Trấn Phố Lu's 6th-clearest and 9th-windiest month. For the whole year in context, see Thị Trấn Phố Lu's year-round climate.

Daytime high
29°
5th warmest
Overnight low
23°
9th coldest
Rainfall
211 mm
20.5 wet days
Daylight
12 h 06 min
5:54 AM – 6:01 PM
Cloud cover
69%
6th clearest
Wind
3 km/h
9th windiest
Solar energy
4.24 kWh/m²
Travel score
4.0
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 Thị Trấn Phố Lu reaches about 29°C in the afternoon and slips back to 23°C overnight — a 7°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 1°C cooler than August and about 3°C warmer than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13024
23023
33023
43023
53023
63023
73023
83023
93023
103023
113023
122923
132923
142923
152923
162923
172923
182922
192922
202922
212922
222922
232922
242922
252922
262822
272822
282822
292822
302822

How September really feels in Thị Trấn Phố Lu

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.

Thị Trấn Phố Lu weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan18° / 12°7316.410.85.0
Feb20° / 13°6515.511.25.3
Mar24° / 16°9618.111.85.5
Apr28° / 20°11618.412.54.8
May30° / 23°23521.713.13.6
Jun31° / 24°29623.813.32.8
Jul31° / 25°34424.613.22.9
Aug30° / 24°35223.912.83.1
Sep29° / 23°21120.512.14.0
Oct26° / 20°12716.211.55.7
Nov23° / 16°7913.510.96.2
Dec20° / 13°7013.210.75.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 65%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12773
22773
32773
42773
52773
62872
72872
82971
93070
103070
113169
123169
133268
143367
153367
163466
173664
183763
193763
203763
214060
224060
234159
244258
254357
264456
274555
284555
294555
304555

Chance of precipitation in September

Any precipitation

Thị Trấn Phố Lu gets around 211 mm of rain over 20.5 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 69% and peaks near 76% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
176
275
375
475
574
674
773
873
973
1072
1172
1272
1371
1471
1571
1670
1769
1869
1968
2067
2166
2265
2364
2463
2562
2661
2760
2859
2958
3057

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 69% of days. Sticky, muggy-or-worse air turns up on roughly 95% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10057916
20067816
30177715
40177715
50187714
60197614
701107613
802107612
902117512
1002117611
1103127510
120313759
130314758
140315748
150415747
160416746
170517726
180518725
190519715
201620685
211622665
221723645
231724644
241826614
251827604
261928584
2711030554
2811131543
2911132533
3011232523

Wind in September

Winds average 3 km/h in September.

Across September, daily wind ranges from about 3 km/h on the calmest days to 3 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm

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 5:49 AM to 5:58 AM, and sunset from 6:17 PM to 5:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:496:17
212.45:506:16
312.45:506:15
412.45:506:14
512.45:516:13
612.35:516:12
712.35:516:11
812.35:516:10
912.35:526:09
1012.35:526:08
1112.25:526:07
1212.25:536:06
1312.25:536:04
1412.25:536:03
1512.15:536:02
1612.15:546:01
1712.15:546:00
1812.15:545:59
1912.15:555:58
2012.05:555:57
2112.05:555:56
2212.05:565:55
2312.05:565:54
2412.05:565:53
2511.95:565:52
2611.95:575:51
2711.95:575:50
2811.95:575:49
2911.85:585:48
3011.85:585:47

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.24 kWh/m².

For context, solar energy here swings from a low near 2.45 kWh/m² to a high of 4.78 kWh/m² in May across the year — September's 4.24 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.2Bright
164.2Bright
174.2Bright
184.2Bright
194.2Bright
204.2Bright
214.1Bright
224.1Bright
234.1Bright
244.1Bright
254.1Bright
264.1Bright
274.0Bright
284.0Bright
294.0Bright
304.0Moderate
Planning a trip in September

Hazard calendar for Thị Trấn Phố Lu

In seasonPeak

In September, Thị Trấn Phố Lu sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Thị Trấn Phố Lu's rainy season runs May–September, 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 Thị Trấn Phố Lu?

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

4.0
Sightseeing
8th-best month of the year
5.1
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Thị Trấn Phố Lu for sightseeing.

What to pack for Thị Trấn Phố Lu in September

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

In September, Thị Trấn Phố Lu sees daytime highs around 29°C and nights near 23°C. Pack light clothes and rain gear. About 21 days see rain.

light clothesrain gear

UV index in Thị Trấn Phố Lu 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 Thị Trấn Phố Lu peaks around June 21 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highVery highExtremeVery highHighJun 21UV 13Dec 18UV 5
UV index (midday)Level
Jan6High
Feb8Very high
Mar11Extreme
Apr8Very high
May10Very high
Jun14Extreme
Jul13Extreme
Aug12Extreme
Sep10Very high
Oct8Very high
Nov7High
Dec5High

Air quality in Thị Trấn Phố Lu 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 Thị Trấn Phố Lu is worst in March — around 49 µg/m³ PM2.5 (poor), about 2.8× the cleanest month (July, 17 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorMar 2349 µg/m³Jul 1817 µg/m³
PM2.5 (µg/m³)Level
Jan36Poor
Feb40Poor
Mar49Poor
Apr48Poor
May30Moderate
Jun19Moderate
Jul17Moderate
Aug18Moderate
Sep23Moderate
Oct28Moderate
Nov33Moderate
Dec36Poor
Location & terrain

Where is Thị Trấn Phố Lu?

Thị Trấn Phố Lu sits at 22.3°N, 104.2°E, 77 m above sea level, in Vietnam. The nearest listed city is Lào Cai, 29 km away.

Hà Giang

Topography around Thị Trấn Phố Lu

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Thị Trấn Phố Lu.

Within 3 km, the terrain around Thị Trấn Phố Lu has significant variations in elevation — a maximum elevation change of 328 m around an average of 149 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,129 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,061 m.

The land around Thị Trấn Phố Lu is covered by trees (86%) within 3 km, trees (91%) within 16 km, and trees (87%) within 80 km.

3 km
328 m
16 km
2,129 m
80 km
3,061 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Lào Cai 29 km · Sapa 35 km · Thị Trấn Việt Quang 65 km · Bắc Quang 72 km · Lai Châu 75 km · Nghĩa Lộ 87 km · Ít Ong 91 km · Hà Giang 99 km

Vietnam travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B / C / F
220 V · 50 Hz
Prices
≈ 29% of US
price level, 2025
GDP per capita
$5,066
2025
Happiness
6.4 / 10
World Happiness, 2025
Safe drinking water
59%
of population, 2024
Homicide rate
1.5
per 100k, 2011
Road deaths
30.6
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 500
Religion
none 86%Catholic 6%Buddhist 6%Protestant 1%

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 Thị Trấn Phố Lu (22.3192°, 104.1872°, elevation 77 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).