Chũ weather in January

In January, Chũ sees average daytime highs of 19°C and overnight lows near 14°C, with 37 mm of rain across 6.8 wet days and about 10.8 hours of daylight. It is the 12th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 19°C through the month. The sky is clear or mostly clear about 12% of the time in January, and the air most often feels dry.

Daylight stretches from about 10 h 42 min at the start of January to 11 hours by month's end. Set against the rest of the year, January is Chũ's 7th-clearest and 5th-windiest month. For the whole year in context, see Chũ's year-round climate.

Daytime high
19°
12th warmest
Overnight low
14°
1st coldest
Rainfall
37 mm
6.8 wet days
Daylight
10 h 48 min
6:38 AM – 5:28 PM
Cloud cover
79%
7th clearest
Wind
9 km/h
5th windiest
Solar energy
2.25 kWh/m²
Travel score
6.2
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 January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 19°C through the month.

A typical January day in Chũ reaches about 19°C in the afternoon and slips back to 14°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 25°C. Set against its neighbours, January runs about 2°C cooler than December and about 1°C cooler than February.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12014
22014
32014
42014
52014
62014
72014
82014
92014
102014
112014
121914
131914
141913
151913
161913
171913
181913
191913
201913
211913
221913
231913
241913
251913
261913
271913
281913
291914
301914
311914

How January really feels in Chũ

Once humidity and wind are folded in, January 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

January 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 January compares with the rest of the year at a glance. January is the 12th-warmest and 10th-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 January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 8% of January, with mostly cloudy or overcast conditions the remaining 80%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13070
22872
32773
42575
52476
62377
72278
82278
92179
102080
111981
121882
131882
141882
151783
161783
171882
181882
191882
201882
211882
221882
231981
241981
251981
261981
271981
281882
291981
301981
312080

Chance of precipitation in January

Any precipitation

Chũ gets around 37 mm of rain over 6.8 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 22% and peaks near 23% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
121
221
321
422
522
623
723
823
923
1023
1123
1223
1323
1423
1523
1623
1723
1823
1922
2022
2122
2222
2321
2421
2522
2622
2722
2822
2922
3022
3121

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the dry band about 54% of days. Sticky, muggy-or-worse air turns up on roughly 11% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1512118100
2502119110
3502019110
4511919110
5501919121
6501819121
7521718121
8521718121
9521718121
10531717121
11531717121
12531717121
13531717121
14541717111
15541717111
16551717101
17551717101
18551717101
1956171791
2056171791
2156171791
2257161791
2357161791
2457151891
2557151891
2657151891
27571418101
28571418101
29571418101
30571418101
31551418112

Wind in January

Winds average 9 km/h in January.

Across January, 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
18calm
28calm
38calm
48calm
58calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 10 h 42 min at the start of January to 11 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over January. Sunrise moves from 6:35 AM to 6:36 AM, and sunset from 5:18 PM to 5:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.76:355:18
210.76:365:19
310.76:365:20
410.76:365:20
510.76:365:21
610.76:375:21
710.86:375:22
810.86:375:23
910.86:375:23
1010.86:385:24
1110.86:385:25
1210.86:385:25
1310.86:385:26
1410.86:385:27
1510.86:385:27
1610.86:385:28
1710.86:385:29
1810.96:385:29
1910.96:385:30
2010.96:385:31
2110.96:385:31
2210.96:385:32
2310.96:385:33
2410.96:385:33
2510.96:385:34
2610.96:385:34
2711.06:375:35
2811.06:375:36
2911.06:375:36
3011.06:375:37
3111.06:365:38

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.25 kWh/m² — the year's lowest.

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 — January's 2.25 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.5Moderate
22.4Moderate
32.4Moderate
42.4Moderate
52.4Moderate
62.3Moderate
72.3Moderate
82.3Moderate
92.3Moderate
102.3Moderate
112.2Moderate
122.2Moderate
132.2Moderate
142.2Moderate
152.2Moderate
162.2Moderate
172.2Moderate
182.2Moderate
192.2Moderate
202.2Moderate
212.2Moderate
222.2Moderate
232.3Moderate
242.3Moderate
252.3Moderate
262.3Moderate
272.3Moderate
282.3Moderate
292.3Moderate
302.4Moderate
312.4Moderate
Planning a trip in January

Hazard calendar for Chũ

In seasonPeak

None of Chũ's seasonal hazards are active in January. 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 January a good time to visit Chũ?

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

6.2
Sightseeing
5th-best month of the year
3.0
Beach & pool
12th-best month of the year

January is a reasonable time to visit Chũ for sightseeing.

What to pack for Chũ in January

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

In January, Chũ sees daytime highs around 19°C and nights near 14°C. Little to plan around — just the basics. About 7 days see rain.

UV index in Chũ in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 7 — 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 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 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
January 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).