Bản Na Hỷ weather in December

In December, Bản Na Hỷ sees average daytime highs of 20°C and overnight lows near 13°C, with 21 mm of rain across 4.9 wet days and about 10.8 hours of daylight. It is the 11th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 20°C by the end. The sky is clear or mostly clear about 30% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 54 min at the start of December to 10 h 48 min by month's end. Set against the rest of the year, December is Bản Na Hỷ's 4th-clearest and 8th-windiest month. For the whole year in context, see Bản Na Hỷ's year-round climate.

Daytime high
20°
11th warmest
Overnight low
13°
2nd coldest
Rainfall
21 mm
4.9 wet days
Daylight
10 h 48 min
6:33 AM – 5:23 PM
Cloud cover
62%
4th clearest
Wind
4 km/h
8th windiest
Solar energy
2.83 kWh/m²
Travel score
7.0
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 21°C in the first days to 20°C by the end.

A typical December day in Bản Na Hỷ reaches about 20°C in the afternoon and slips back to 13°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 25°C. Set against its neighbours, December runs about 3°C cooler than November and on par with January.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12215
22114
32114
42114
52114
62114
72114
82114
92114
102013
112013
122013
132013
142013
152013
162013
172013
182013
192012
202012
212012
222012
232012
242012
252012
262012
272012
282012
292012
302012
312012

How December really feels in Bản Na Hỷ

Once humidity and wind are folded in, December 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

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

Bản Na Hỷ weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan20° / 12°215116.8
Feb22° / 14°175.211.37.2
Mar25° / 16°429.111.96.9
Apr28° / 19°6814.812.45.1
May30° / 22°15522.212.93.4
Jun31° / 23°15822.313.23.0
Jul30° / 23°23324.413.13.1
Aug29° / 22°29826.812.73.2
Sep28° / 21°23122.612.14.1
Oct26° / 19°11815.411.55.8
Nov23° / 16°356.911.17.2
Dec20° / 13°214.910.87.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 59%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
23862
33862
43763
53763
63763
73565
83565
93565
103664
113862
123862
133961
144060
154159
164258
174456
184456
194555
204753
214753
224753
234753
244753
254753
264753
274654
284654
294654
304555
314258

Chance of precipitation in December

Any precipitation

Bản Na Hỷ gets around 21 mm of rain over 4.9 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 15% and peaks near 19% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
119
219
318
418
518
617
717
817
916
1016
1115
1215
1314
1414
1513
1613
1713
1813
1914
2014
2114
2214
2314
2414
2514
2615
2715
2815
2915
3016
3116

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1222733171
2232832161
3242931151
4253031141
5263130131
6273229121
7283328111
8293327101
931342691
1032342680
1133342570
1235342470
1336332460
1437332360
1539322360
1640322260
1740322260
1841312160
1942312160
2043312150
2143312050
2243322050
2343322040
2443332040
2543332040
2643342130
2742342130
2841342230
2941352220
3040352320
3139352420

Wind in December

Winds average 4 km/h in December.

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

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 54 min at the start of December to 10 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:25 AM to 6:40 AM, and sunset from 5:19 PM to 5:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.96:255:19
210.96:255:19
310.96:265:19
410.96:265:19
510.96:275:19
610.96:285:20
710.96:285:20
810.96:295:20
910.96:295:20
1010.86:305:21
1110.86:305:21
1210.86:315:21
1310.86:325:22
1410.86:325:22
1510.86:335:22
1610.86:335:23
1710.86:345:23
1810.86:345:24
1910.86:355:24
2010.86:355:24
2110.86:365:25
2210.86:365:25
2310.86:375:26
2410.86:375:26
2510.86:385:27
2610.86:385:27
2710.86:385:28
2810.86:395:28
2910.86:395:29
3010.86:405:29
3110.86:405:30

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.83 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.83 kWh/m² to a high of 5.21 kWh/m² in June across the year — December's 2.83 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.9Moderate
22.8Moderate
32.8Moderate
42.8Moderate
52.8Moderate
62.8Moderate
72.8Moderate
82.8Moderate
92.8Moderate
102.8Moderate
112.8Moderate
122.8Moderate
132.8Moderate
142.8Moderate
152.8Moderate
162.9Moderate
172.9Moderate
182.9Moderate
192.9Moderate
202.9Moderate
212.9Moderate
222.9Moderate
232.9Moderate
242.9Moderate
252.9Moderate
262.9Moderate
272.9Moderate
282.9Moderate
292.9Moderate
302.9Moderate
312.9Moderate
Planning a trip in December

Hazard calendar for Bản Na Hỷ

In seasonPeak

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

Bản Na Hỷ's monsoon runs May–September, when most of the year's rain falls.

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

Is December a good time to visit Bản Na Hỷ?

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

7.0
Sightseeing
3rd-best month of the year
3.9
Beach & pool
11th-best month of the year

December is one of the better times to visit Bản Na Hỷ for general sightseeing.

What to pack for Bản Na Hỷ in December

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

In December, Bản Na Hỷ sees daytime highs around 20°C and nights near 13°C. Little to plan around — just the basics. About 5 days see rain.

UV index in Bản Na Hỷ in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Bản Na Hỷ peaks around August 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highExtremeVery highHighAug 13UV 14Dec 17UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar11Extreme
Apr9Very high
May9Very high
Jun14Extreme
Jul13Extreme
Aug14Extreme
Sep11Extreme
Oct10Very high
Nov8Very high
Dec6High

Air quality in Bản Na Hỷ in December

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Bản Na Hỷ is worst in April — around 162 µg/m³ PM2.5 (very unhealthy), about 19.2× the cleanest month (August, 8 µg/m³).

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

0306090120150180JanFebMarAprMayJunJulAugSepOctNovDecModerateUnhealthyModerateGoodModerateApr 14150 µg/m³Aug 159 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb30Moderate
Mar83Unhealthy
Apr162Very unhealthy
May34Moderate
Jun28Moderate
Jul10Good
Aug8Good
Sep11Good
Oct15Moderate
Nov15Moderate
Dec19Moderate
Location & terrain

Where is Bản Na Hỷ?

Bản Na Hỷ sits at 19.6°N, 104.5°E, 303 m above sea level, in Vietnam. The nearest listed city is Thái Hòa, 85 km away.

Thị Trấn Lam SơnVieng XaiXam NuaKim LiênHoàng MaiDiễn ThànhThanh Hóa

Topography around Bản Na Hỷ

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

Within 3 km, the terrain around Bản Na Hỷ has large variations in elevation — a maximum elevation change of 1,158 m around an average of 625 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,938 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,684 m.

The land around Bản Na Hỷ is covered by trees (94%) within 3 km, trees (89%) within 16 km, and trees (91%) within 80 km.

3 km
1,158 m
16 km
1,938 m
80 km
2,684 m
treesgrasslandcroplandwater
December weather nearby: Thái Hòa 85 km · Thị Trấn Lam Sơn 99 km · Vieng Xai 99 km · Xam Nua 108 km · Kim Liên 112 km · Hoàng Mai 128 km · Diễn Thành 130 km · Thanh Hóa 132 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 Bản Na Hỷ (19.5636°, 104.5346°, elevation 303 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).