Chũ weather in December

In December, Chũ sees average daytime highs of 21°C and overnight lows near 15°C, with 34 mm of rain across 6.5 wet days and about 10.7 hours of daylight. It is the 10th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 21°C by the end. The sky is clear or mostly clear about 27% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 48 min at the start of December to 10 h 42 min by month's end. Set against the rest of the year, December is Chũ's 3rd-clearest and 5th-windiest month. For the whole year in context, see Chũ's year-round climate.

Daytime high
21°
10th warmest
Overnight low
15°
2nd coldest
Rainfall
34 mm
6.5 wet days
Daylight
10 h 42 min
6:29 AM – 5:11 PM
Cloud cover
64%
3rd clearest
Wind
9 km/h
5th windiest
Solar energy
2.67 kWh/m²
Travel score
6.9
out of 10

Chũ is ward in Bắc Ninh province, Vietnam.

Density
40,088/km²
people per km²
Founded
1957

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 23°C in the first days to 21°C by the end.

A typical December day in Chũ reaches about 21°C in the afternoon and slips back to 15°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 26°C. Set against its neighbours, December runs about 4°C cooler than November and about 2°C warmer than January.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12316
22316
32316
42316
52216
62216
72215
82215
92215
102215
112215
122115
132115
142115
152114
162114
172114
182114
192114
202114
212114
222114
232114
242114
252114
262114
272114
282114
292114
302014
312014

How December really feels in Chũ

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.

Chũ weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan19° / 14°376.810.86.2
Feb21° / 15°226.311.36.4
Mar23° / 18°491011.86.4
Apr28° / 22°7911.912.55.5
May31° / 24°25420.2133.4
Jun32° / 26°2872213.32.5
Jul32° / 26°30124.613.22.5
Aug32° / 26°36626.212.72.5
Sep31° / 24°23320.112.13.4
Oct29° / 22°10211.911.55.5
Nov25° / 18°557.7117.0
Dec21° / 15°346.510.76.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24159
34060
43961
53961
63862
73862
83862
93664
103664
113763
123763
133763
143862
153862
163862
173961
183862
194060
204060
214060
223961
234060
244060
253961
263862
273862
283763
293565
303367
313268

Chance of precipitation in December

Any precipitation

Chũ gets around 34 mm of rain over 6.5 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 21% and peaks near 24% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
124
224
324
424
524
623
723
823
923
1022
1122
1221
1321
1421
1520
1620
1720
1820
1920
2019
2119
2219
2319
2419
2519
2619
2719
2820
2920
3020
3121

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 50% of days. Sticky, muggy-or-worse air turns up on roughly 14% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1372119157
2392118157
3402118146
4422117146
5432117136
6452216135
7462215125
8472214124
9492214124
10502213123
11512113123
12512113123
13522112123
14532112122
15542012122
16542012122
17542012122
18542012122
19532112122
20542112112
21542112112
22542113102
23552113101
24532214101
2554221491
2653221591
2752221691
2851221791
2952221790
30502218100
31502218100

Wind in December

Winds average 9 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 48 min at the start of December to 10 h 42 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 6:20 AM to 6:35 AM, and sunset from 5:07 PM to 5:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.86:205:07
210.86:205:07
310.86:215:08
410.86:225:08
510.86:225:08
610.86:235:08
710.76:245:08
810.76:245:09
910.76:255:09
1010.76:255:09
1110.76:265:09
1210.76:265:10
1310.76:275:10
1410.76:285:10
1510.76:285:11
1610.76:295:11
1710.76:295:11
1810.76:305:12
1910.76:305:12
2010.76:315:13
2110.76:315:13
2210.76:325:14
2310.76:325:14
2410.76:335:15
2510.76:335:15
2610.76:345:16
2710.76:345:16
2810.76:345:17
2910.76:355:17
3010.76:355:18
3110.76:355:18

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.67 kWh/m².

For context, solar energy here swings from a low near 2.25 kWh/m² to a high of 4.86 kWh/m² in June across the year — December's 2.67 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.8Moderate
22.8Moderate
32.8Moderate
42.8Moderate
52.7Moderate
62.7Moderate
72.7Moderate
82.7Moderate
92.7Moderate
102.7Moderate
112.7Moderate
122.7Moderate
132.7Moderate
142.7Moderate
152.7Moderate
162.7Moderate
172.7Moderate
182.7Moderate
192.7Moderate
202.7Moderate
212.7Moderate
222.7Moderate
232.7Moderate
242.7Moderate
252.7Moderate
262.6Moderate
272.6Moderate
282.6Moderate
292.6Moderate
302.5Moderate
312.5Moderate
Planning a trip in December

Hazard calendar for Chũ

In seasonPeak

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

Chũ'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 Chũ?

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

6.9
Sightseeing
2nd-best month of the year
4.5
Beach & pool
7th-best month of the year

December is a reasonable time to visit Chũ for sightseeing.

What to pack for Chũ in December

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

In December, Chũ sees daytime highs around 21°C and nights near 15°C. Little to plan around — just the basics. About 7 days see rain.

UV index in Chũ 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 Chũ peaks around June 21 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 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 21UV 11Dec 15UV 6
UV index (midday)Level
Jan7High
Feb7Very high
Mar8Very high
Apr7High
May9Very high
Jun12Extreme
Jul11Extreme
Aug8Very high
Sep8Very high
Oct8Very high
Nov6High
Dec6High

Air quality in Chũ 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 Chũ is worst in December — around 92 µg/m³ PM2.5 (unhealthy), about 2.6× the cleanest month (July, 35 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyDec 2192 µg/m³Jul 1335 µg/m³
PM2.5 (µg/m³)Level
Jan90Unhealthy
Feb80Unhealthy
Mar76Unhealthy
Apr66Unhealthy
May49Poor
Jun37Poor
Jul35Moderate
Aug40Poor
Sep59Unhealthy
Oct74Unhealthy
Nov82Unhealthy
Dec92Unhealthy
Location & terrain

Where is Chũ?

Chũ sits at 21.4°N, 106.6°E, 18 m above sea level, in Vietnam. The nearest listed city is Thị Trấn Đông Triều, 33 km away.

Topography around Chũ

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

Within 3 km, the terrain around Chũ has only modest variations in elevation — a maximum elevation change of 202 m around an average of 17 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 508 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,567 m.

The land around Chũ is covered by trees (84%) within 3 km, trees (87%) within 16 km, and trees (67%) within 80 km.

3 km
202 m
16 km
508 m
80 km
1,567 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Thị Trấn Đông Triều 33 km · Thị Trấn Mạo Khê 35 km · Bắc Giang 40 km · Chí Linh 43 km · Thành Phố Uông Bí 43 km · Việt Yên 46 km · Cung Kiệm 47 km · Hải Dương 54 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 Chũ (21.3738°, 106.5665°, elevation 18 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).