Biên Hòa weather in January

In January, Biên Hòa sees average daytime highs of 32°C and overnight lows near 23°C, with 21 mm of rain across 3.8 wet days and about 11.4 hours of daylight. It is the 6th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 29% of the time in January, and the air most often feels muggy.

Daylight stretches from about 11 h 24 min at the start of January to 11 h 30 min by month's end. Set against the rest of the year, January is Biên Hòa's 3rd-clearest and 10th-windiest month. For the whole year in context, see Biên Hòa's year-round climate.

Daytime high
32°
6th warmest
Overnight low
23°
1st coldest
Rainfall
21 mm
3.8 wet days
Daylight
11 h 24 min
6:19 AM – 5:45 PM
Cloud cover
58%
3rd clearest
Wind
6 km/h
10th windiest
Solar energy
5.11 kWh/m²
Travel score
4.7
out of 10

Biên Hòa is old city in Đồng Nai province, Vietnam.

Density
4,818/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical January day in Biên Hòa reaches about 32°C in the afternoon and slips back to 23°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°C. Set against its neighbours, January runs on par with December and about 1°C cooler than February.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13123
23123
33123
43123
53123
63123
73123
83123
93123
103123
113223
123223
133223
143223
153223
163223
173223
183223
193223
203223
213223
223223
233223
243223
253223
263223
273223
283223
293223
303223
313223

How January really feels in Biên Hòa

Once humidity and wind are folded in, January averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in January is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Biên Hòa weather by month

How January compares with the rest of the year at a glance. January is the 6th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°213.811.44.7
Feb33° / 24°81.611.64.3
Mar34° / 25°25511.93.4
Apr34° / 26°7512.312.22.7
May33° / 26°2052412.52.2
Jun32° / 25°25626.912.62.3
Jul31° / 25°27628.712.62.4
Aug31° / 25°28328.812.42.4
Sep31° / 25°30128.412.12.4
Oct31° / 25°25026.411.82.7
Nov31° / 24°12215.511.53.8
Dec31° / 23°558.611.44.5

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 22% of January, with mostly cloudy or overcast conditions the remaining 50%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24456
34456
44555
54654
64852
74951
84951
95050
105050
115050
125149
135050
145149
155050
165149
175050
185050
195149
205050
215149
225050
235149
245248
255248
265446
275446
285644
295644
305842
315842

Chance of precipitation in January

Any precipitation

Biên Hòa gets around 21 mm of rain over 3.8 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 12% and peaks near 16% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
116
216
315
414
514
613
713
812
912
1012
1112
1212
1312
1412
1512
1612
1712
1813
1913
2013
2113
2213
2313
2412
2512
2612
2711
2810
2910
309
318

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the muggy band about 45% of days. Sticky, muggy-or-worse air turns up on roughly 87% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10940465
20940464
30941464
40941473
50942473
60942472
70942462
81942462
911043452
1011043452
1111043442
1211144432
1311144422
1411244422
1511244412
1611344402
1711344402
1811345392
1911445382
2011445372
2111446372
2221446362
2321447352
2421447342
2521448332
2621549322
2721549322
2821550312
2921650302
3021651292
3121652282

Wind in January

Winds average 6 km/h in January.

Across January, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
297calm
307calm
317calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 11 h 24 min at the start of January to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over January. Sunrise moves from 6:15 AM to 6:21 AM, and sunset from 5:37 PM to 5:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.46:155:37
211.46:155:37
311.46:165:38
411.46:165:38
511.46:165:39
611.46:175:40
711.46:175:40
811.46:175:41
911.46:185:41
1011.46:185:42
1111.46:185:42
1211.46:185:43
1311.46:195:43
1411.46:195:44
1511.46:195:44
1611.46:195:45
1711.46:195:45
1811.46:205:46
1911.46:205:46
2011.46:205:47
2111.56:205:47
2211.56:205:48
2311.56:205:48
2411.56:205:49
2511.56:205:49
2611.56:215:49
2711.56:215:50
2811.56:215:50
2911.56:215:51
3011.56:215:51
3111.56:215:52

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.11 kWh/m².

For context, solar energy here swings from a low near 4.5 kWh/m² to a high of 6.12 kWh/m² in March across the year — January's 5.11 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.4Bright
285.4Bright
295.4Bright
305.5Bright
315.5Bright
Planning a trip in January

Hazard calendar for Biên Hòa

In seasonPeak

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

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

Biên Hòa's rainy season runs May–October, when most of the year's rain falls.

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

Is January a good time to visit Biên Hòa?

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

4.7
Sightseeing
1st-best month of the year
7.3
Beach & pool
2nd-best month of the year

January is a reasonable time to visit Biên Hòa for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Biên Hòa in January

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

In January, Biên Hòa sees daytime highs around 32°C and nights near 23°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.

light clothessun protection

Sea temperature near Biên Hòa in January

The nearest coast averages about 26°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 64 km away) is warmest in May at about 30°C and coldest in January near 26°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar27Warm
Apr29Tropical
May30Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec27Warm

UV index in Biên Hòa in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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 Biên Hòa peaks around March 23 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 15 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highMar 23UV 13Nov 15UV 8
UV index (midday)Level
Jan10Very high
Feb11Extreme
Mar13Extreme
Apr13Extreme
May12Extreme
Jun11Extreme
Jul11Extreme
Aug12Extreme
Sep12Extreme
Oct9Very high
Nov8Very high
Dec9Very high

Air quality in Biên Hòa in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Biên Hòa is worst in January — around 54 µg/m³ PM2.5 (poor), about 1.9× the cleanest month (August, 29 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorJan 1853 µg/m³Aug 1229 µg/m³
PM2.5 (µg/m³)Level
Jan54Poor
Feb49Poor
Mar47Poor
Apr44Poor
May39Poor
Jun34Moderate
Jul31Moderate
Aug29Moderate
Sep35Moderate
Oct43Poor
Nov48Poor
Dec46Poor
Location & terrain

Where is Biên Hòa?

Biên Hòa sits at 10.9°N, 106.8°E, 6 m above sea level, in Vietnam. The nearest listed city is Dĩ An, 7.0 km away.

Topography around Biên Hòa

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

Within 3 km, the terrain around Biên Hòa has only modest variations in elevation — a maximum elevation change of 59 m around an average of 7 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 170 m; within 80 km, large variations in elevation — a maximum elevation change of 888 m.

The land around Biên Hòa is covered by artificial surfaces (51%) within 3 km, artificial surfaces (45%) and trees (27%) within 16 km, and trees (55%) within 80 km.

3 km
59 m
16 km
170 m
80 km
888 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
January weather nearby: Dĩ An 7.0 km · Thủ Đức 12 km · Thuận An 12 km · Tân Uyên 16 km · Thủ Dầu Một 19 km · Bình Thạnh 20 km · Trảng Bom 20 km · Gò Vấp 21 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 Biên Hòa (10.9447°, 106.8243°, elevation 6 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).