Phủ Lý weather in September

In September, Phủ Lý sees average daytime highs of 31°C and overnight lows near 25°C, with 274 mm of rain across 21 wet days and about 12.1 hours of daylight. It is the 5th-warmest and 2nd-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 18% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Phủ Lý's 5th-clearest and 11th-windiest month. For the whole year in context, see Phủ Lý's year-round climate.

Daytime high
31°
5th warmest
Overnight low
25°
8th coldest
Rainfall
274 mm
21 wet days
Daylight
12 h 06 min
5:47 AM – 5:54 PM
Cloud cover
74%
5th clearest
Wind
7 km/h
11th windiest
Solar energy
4.31 kWh/m²
Travel score
3.2
out of 10

Phủ Lý is the former provincial capital of the former Ha Nam province, Vietnam.

Density
1,555/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

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

A typical September day in Phủ Lý 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 28°C and 34°C. Set against its neighbours, September runs about 1°C cooler than August and about 2°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13226
23226
33226
43226
53226
63226
73226
83126
93125
103125
113125
123125
133125
143125
153125
163125
173125
183125
193125
203125
213125
223125
233125
243125
253124
263124
273124
283124
293124
303024

How September really feels in Phủ Lý

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
7 feel dangerously hot (≥ 39°C)
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.

Phủ Lý weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan20° / 15°336.610.96.5
Feb22° / 16°215.211.36.8
Mar24° / 19°438.311.96.7
Apr28° / 22°719.712.55.6
May32° / 25°19416.1133.4
Jun34° / 27°19415.913.22.5
Jul33° / 27°25319.613.12.5
Aug32° / 26°34023.812.72.5
Sep31° / 25°2742112.13.2
Oct29° / 23°14213.911.55.1
Nov26° / 19°598116.9
Dec22° / 16°295.510.87.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 70%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11981
21981
31981
41981
51981
62179
72179
82179
92377
102476
112575
122575
132674
142872
152971
163169
173268
183367
193565
203664
213763
223862
233862
243961
254060
264159
274357
284357
294357
304456

Chance of precipitation in September

Any precipitation

Phủ Lý gets around 274 mm of rain over 21 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 70% and peaks near 84% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
184
284
384
484
584
683
782
881
980
1079
1177
1276
1374
1472
1570
1668
1766
1865
1963
2062
2160
2259
2359
2458
2557
2657
2757
2856
2956
3056

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 74% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100595
200595
300694
400694
501792
601891
711989
8121087
9121087
10121285
11131383
12131482
13131581
14141679
15151876
16151975
17162172
18162271
19172369
20182566
21182665
22192862
23192961
242103058
252113156
262113255
273123253
283133351
293143349
304143448

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 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 36 minutes over September. Sunrise moves from 5:44 AM to 5:51 AM, and sunset from 6:08 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:446:08
212.45:446:08
312.45:446:07
412.45:446:06
512.35:456:05
612.35:456:04
712.35:456:03
812.35:456:02
912.35:466:01
1012.25:466:00
1112.25:465:59
1212.25:465:58
1312.25:475:57
1412.25:475:56
1512.15:475:55
1612.15:475:54
1712.15:475:53
1812.15:485:52
1912.15:485:51
2012.05:485:50
2112.05:485:49
2212.05:495:48
2312.05:495:47
2412.05:495:46
2511.95:495:45
2611.95:505:44
2711.95:505:44
2811.95:505:43
2911.95:505:42
3011.85:515:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.31 kWh/m².

For context, solar energy here swings from a low near 2.32 kWh/m² to a high of 5.17 kWh/m² in June across the year — September's 4.31 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.4Bright
214.4Bright
224.4Bright
234.4Bright
244.4Bright
254.4Bright
264.4Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
Planning a trip in September

Hazard calendar for Phủ Lý

In seasonPeak

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

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

Phủ Lý's monsoon runs May–September, 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 Phủ Lý?

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

3.2
Sightseeing
9th-best month of the year
4.8
Beach & pool
8th-best month of the year

September is a weaker month for outdoor sightseeing in Phủ Lý.

What to pack for Phủ Lý in September

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

In September, Phủ Lý sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. About 21 days see rain.

light clothesrain gear

Sea temperature near Phủ Lý in September

The nearest coast averages about 29°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 67 km away) is warmest in August at about 30°C and coldest in February near 20°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
Feb20Refreshing
Mar21Refreshing
Apr24Refreshing
May27Warm
Jun29Tropical
Jul30Tropical
Aug30Tropical
Sep29Tropical
Oct28Tropical
Nov26Warm
Dec23Refreshing

UV index in Phủ Lý in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Phủ Lý peaks around July 12 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highVery highExtremeVery highHighJul 12UV 11Dec 16UV 6
UV index (midday)Level
Jan7High
Feb8Very high
Mar9Very high
Apr7High
May9Very high
Jun11Extreme
Jul11Extreme
Aug10Very high
Sep8Very high
Oct8Very high
Nov7High
Dec6High

Air quality in Phủ Lý 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 Phủ Lý is worst in December — around 134 µg/m³ PM2.5 (unhealthy), about 3.8× the cleanest month (July, 35 µg/m³).

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

0306090120150JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyDec 20132 µg/m³Jul 1536 µg/m³
PM2.5 (µg/m³)Level
Jan126Unhealthy
Feb106Unhealthy
Mar94Unhealthy
Apr87Unhealthy
May60Unhealthy
Jun42Poor
Jul35Moderate
Aug46Poor
Sep69Unhealthy
Oct93Unhealthy
Nov116Unhealthy
Dec134Unhealthy
Location & terrain

Where is Phủ Lý?

Phủ Lý sits at 20.5°N, 105.9°E, 8 m above sea level, in Vietnam. The nearest listed city is Hưng Yên, 18 km away.

Topography around Phủ Lý

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

Within 3 km, the terrain around Phủ Lý has only modest variations in elevation — a maximum elevation change of 14 m around an average of 5 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 433 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,248 m.

The land around Phủ Lý is covered by artificial surfaces (44%), cropland (24%) and trees (20%) within 3 km, cropland (45%) and trees (34%) within 16 km, and cropland (39%) and trees (38%) within 80 km.

3 km
14 m
16 km
433 m
80 km
1,248 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Hưng Yên 18 km · Lương Bằng 27 km · Nam Định 30 km · Ninh Binh 33 km · Bo 42 km · Mỹ Hào 45 km · Thái Bình 46 km · Ecopark 46 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 Phủ Lý (20.5453°, 105.9122°, elevation 8 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).