Chũ weather in May

In May, Chũ sees average daytime highs of 31°C and overnight lows near 24°C, with 254 mm of rain across 20.2 wet days and about 13 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 30°C in the first days to 32°C by the end. The sky is clear or mostly clear about 10% of the time in May, and the air most often feels miserable.

Daylight stretches from about 12 h 48 min at the start of May to 13 h 12 min by month's end. Set against the rest of the year, May is Chũ's 6th-clearest and 2nd-windiest month. For the whole year in context, see Chũ's year-round climate.

Daytime high
31°
5th warmest
Overnight low
24°
9th coldest
Rainfall
254 mm
20.2 wet days
Daylight
13 hours
5:19 AM – 6:20 PM
Cloud cover
76%
6th clearest
Wind
9 km/h
2nd windiest
Solar energy
4.78 kWh/m²
Travel score
3.4
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 May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 30°C in the first days to 32°C by the end.

A typical May day in Chũ reaches about 31°C in the afternoon and slips back to 24°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 35°C. Set against its neighbours, May runs about 3°C warmer than April and about 1°C cooler than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13023
23024
33024
43024
53024
63024
73024
83024
93024
103124
113124
123124
133124
143124
153124
163125
173125
183125
193125
203125
213125
223125
233125
243125
253125
263225
273225
283225
293225
303225
313225

How May really feels in Chũ

Once humidity and wind are folded in, May 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 May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Chũ weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 4th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 75%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12872
22872
32971
42971
53070
63169
73169
83169
93169
103169
113169
122971
132971
142872
152773
162674
172575
182575
192377
202278
212179
222080
232080
242080
251981
261981
271783
281783
291684
301684
311585

Chance of precipitation in May

Any precipitation

Chũ gets around 254 mm of rain over 20.2 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 65% and peaks near 72% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
152
253
355
456
557
658
759
860
961
1062
1163
1263
1364
1465
1565
1666
1766
1867
1967
2068
2168
2269
2369
2470
2570
2670
2771
2871
2971
3072
3172

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the miserable band about 57% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
127154036
227153938
316143840
416143742
515143644
615133546
715133348
815123250
914123152
1014123152
1114123053
1214122954
1314112955
1414112856
1513112857
1613112857
1713112758
1813102759
1913102660
2013102660
2112102562
221292464
231292464
241292365
251282366
260272269
270172171
280162073
290151975
300151876
310141778

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 8 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 48 min at the start of May to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over May. Sunrise moves from 5:28 AM to 5:15 AM, and sunset from 6:14 PM to 6:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:286:14
212.85:276:15
312.85:266:15
412.85:266:15
512.85:256:16
612.95:256:16
712.95:246:17
812.95:236:17
912.95:236:17
1012.95:226:18
1112.95:226:18
1213.05:216:19
1313.05:216:19
1413.05:206:20
1513.05:206:20
1613.05:196:20
1713.05:196:21
1813.05:196:21
1913.15:186:22
2013.15:186:22
2113.15:186:23
2213.15:176:23
2313.15:176:24
2413.15:176:24
2513.15:166:24
2613.15:166:25
2713.25:166:25
2813.25:166:26
2913.25:166:26
3013.25:156:27
3113.25:156:27

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.78 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 — May's 4.78 kWh/m² sits near the top of that range.

024151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in May

Hazard calendar for Chũ

In seasonPeak

In May, Chũ sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

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 May a good time to visit Chũ?

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

3.4
Sightseeing
8th-best month of the year
5.0
Beach & pool
5th-best month of the year

May is a weaker month for outdoor sightseeing in Chũ.

What to pack for Chũ in May

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

In May, Chũ sees daytime highs around 31°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

UV index in Chũ in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 9 (very high — sun protection essential). 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 May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May 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
May 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).