Hòa Bình weather in September

In September, Hòa Bình sees average daytime highs of 29°C and overnight lows near 23°C, with 274 mm of rain across 21.1 wet days and about 12.1 hours of daylight. It is the 5th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 17% of the time in September, and the air most often feels oppressive.

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 Hòa Bình's 5th-clearest and 10th-windiest month. For the whole year in context, see Hòa Bình's year-round climate.

Daytime high
29°
5th warmest
Overnight low
23°
9th coldest
Rainfall
274 mm
21.1 wet days
Daylight
12 h 06 min
5:49 AM – 5:56 PM
Cloud cover
75%
5th clearest
Wind
5 km/h
10th windiest
Solar energy
4.12 kWh/m²
Travel score
3.9
out of 10

Hòa Bình is provincial city of Hoa Binh, Vietnam.

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 29°C through the month.

A typical September day in Hòa Bình reaches about 29°C in the afternoon and slips back to 23°C overnight — a 6°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 2°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13024
23024
33024
43024
53024
63024
73024
83024
92924
102924
112924
122924
132924
142923
152923
162923
172923
182923
192923
202923
212923
222923
232923
242923
252923
262923
272923
282823
292822
302822

How September really feels in Hòa Bình

Once humidity and wind are folded in, September averages 22 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
22
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.

Hòa Bình weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan19° / 13°398.210.96.0
Feb20° / 14°256.811.36.3
Mar23° / 17°529.811.96.5
Apr28° / 21°9813.412.55.4
May30° / 23°24120.4133.6
Jun32° / 25°24020.713.22.9
Jul31° / 25°30323.813.12.8
Aug30° / 25°38225.912.72.9
Sep29° / 23°27421.112.13.9
Oct27° / 21°13914.611.55.8
Nov24° / 18°567.6117.1
Dec20° / 14°306.710.86.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 72%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11783
21783
31882
41882
51882
61882
71981
81981
92080
102179
112278
122377
132476
142575
152674
162872
172971
183070
193268
203367
213466
223664
233763
243763
253862
263961
274159
284060
294159
304159

Chance of precipitation in September

Any precipitation

Hòa Bình gets around 274 mm of rain over 21.1 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 71% and peaks near 83% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
183
283
383
482
582
681
781
880
979
1078
1178
1276
1375
1474
1572
1671
1769
1868
1966
2065
2164
2262
2361
2460
2559
2659
2758
2858
2957
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 55% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10014356
20014455
30014653
40024751
50124849
60125047
70135145
80135343
90145441
100145540
110255538
120265636
130275734
140285733
150295831
1602105830
1702115928
1802125927
1902135926
2002155825
2103165724
2203175723
2303185821
2403195820
2503205819
2614205817
2714215816
2815225814
2916225813
3016235812

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 4 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

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 5:46 AM to 5:53 AM, and sunset from 6:11 PM to 5:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:466:11
212.45:466:10
312.45:466:09
412.45:476:08
512.35:476:07
612.35:476:06
712.35:476:05
812.35:486:04
912.35:486:03
1012.25:486:02
1112.25:486:01
1212.25:486:00
1312.25:495:59
1412.25:495:58
1512.15:495:57
1612.15:495:56
1712.15:505:56
1812.15:505:55
1912.15:505:54
2012.05:505:53
2112.05:515:52
2212.05:515:51
2312.05:515:50
2412.05:515:49
2511.95:525:48
2611.95:525:47
2711.95:525:46
2811.95:525:45
2911.95:535:44
3011.85:535:43

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.12 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 4.92 kWh/m² in June across the year — September's 4.12 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.2Bright
54.1Bright
64.1Bright
74.1Bright
84.1Bright
94.1Bright
104.1Bright
114.1Bright
124.1Bright
134.1Bright
144.1Bright
154.1Bright
164.1Bright
174.1Bright
184.1Bright
194.1Bright
204.1Bright
214.1Bright
224.1Bright
234.1Bright
244.1Bright
254.1Bright
264.1Bright
274.1Bright
284.1Bright
294.1Bright
304.1Bright
Planning a trip in September

Hazard calendar for Hòa Bình

In seasonPeak

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

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

Hòa Bình'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 Hòa Bình?

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

3.9
Sightseeing
8th-best month of the year
5.0
Beach & pool
6th-best month of the year

September is a weaker month for outdoor sightseeing in Hòa Bình.

What to pack for Hòa Bình in September

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

In September, Hòa Bình 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 Hòa Bình in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Hòa Bình peaks around June 20 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJun 20UV 13Nov 23UV 6
UV index (midday)Level
Jan7High
Feb8Very high
Mar10Very high
Apr8Very high
May8Very high
Jun13Extreme
Jul11Extreme
Aug12Extreme
Sep8Very high
Oct8Very high
Nov6High
Dec6High

Air quality in Hòa Bình 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 Hòa Bình is worst in April — around 98 µg/m³ PM2.5 (unhealthy), about 3.8× the cleanest month (July, 26 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyApr 1494 µg/m³Jul 2026 µg/m³
PM2.5 (µg/m³)Level
Jan76Unhealthy
Feb71Unhealthy
Mar76Unhealthy
Apr98Unhealthy
May57Unhealthy
Jun32Moderate
Jul26Moderate
Aug28Moderate
Sep39Poor
Oct53Poor
Nov66Unhealthy
Dec77Unhealthy
Location & terrain

Where is Hòa Bình?

Hòa Bình sits at 20.8°N, 105.3°E, 31 m above sea level, in Vietnam. The nearest listed city is Bo, 26 km away.

Topography around Hòa Bình

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

Within 3 km, the terrain around Hòa Bình has significant variations in elevation — a maximum elevation change of 404 m around an average of 77 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,115 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,857 m.

The land around Hòa Bình is covered by trees (51%) and artificial surfaces (22%) within 3 km, trees (83%) within 16 km, and trees (69%) within 80 km.

3 km
404 m
16 km
1,115 m
80 km
1,857 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Bo 26 km · Xuân Mai 27 km · Ba Vì 30 km · Sơn Tây 40 km · Đan Phượng 45 km · Vinhomes Smart City 47 km · Tây Mỗ 47 km · Dại Mỗ 48 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 Hòa Bình (20.8172°, 105.3376°, elevation 31 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). 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).