Thị Trấn Nước Hai weather in May

In May, Thị Trấn Nước Hai sees average daytime highs of 28°C and overnight lows near 21°C, with 214 mm of rain across 22.3 wet days and about 13.1 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 8% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 48 min at the start of May to 13 h 18 min by month's end. Set against the rest of the year, May is Thị Trấn Nước Hai's 6th-clearest and 3rd-windiest month. For the whole year in context, see Thị Trấn Nước Hai's year-round climate.

Daytime high
28°
5th warmest
Overnight low
21°
8th coldest
Rainfall
214 mm
22.3 wet days
Daylight
13 h 06 min
5:19 AM – 6:24 PM
Cloud cover
77%
6th clearest
Wind
8 km/h
3rd windiest
Solar energy
4.29 kWh/m²
Travel score
4.3
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical May day in Thị Trấn Nước Hai reaches about 28°C in the afternoon and slips back to 21°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 32°C. Set against its neighbours, May runs about 3°C warmer than April and about 1°C cooler than June.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12720
22720
32721
42721
52721
62721
72821
82821
92821
102821
112821
122821
132821
142821
152821
162821
172822
182822
192822
202822
212822
222822
232822
242822
252822
262822
272922
282922
292922
302922
312922

How May really feels in Thị Trấn Nước Hai

Once humidity and wind are folded in, May 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

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

Thị Trấn Nước Hai 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
Jan16° / 10°6713.310.84.3
Feb18° / 12°5211.411.25.1
Mar21° / 15°891611.85.3
Apr25° / 19°11117.112.55.3
May28° / 21°21422.313.14.3
Jun29° / 23°29325.213.43.2
Jul30° / 23°30226.413.33.1
Aug30° / 23°26824.412.83.4
Sep29° / 22°15616.812.14.8
Oct26° / 19°871211.56.3
Nov22° / 15°699.710.96.6
Dec18° / 11°509.410.65.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% 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 78%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12773
22773
32872
42872
52872
62872
72872
82872
92872
102872
112674
122575
132575
142575
152476
162476
172377
182278
192278
202179
212080
221981
231981
241783
251783
261684
271585
281486
291387
301387
311288

Chance of precipitation in May

Any precipitation

Thị Trấn Nước Hai gets around 214 mm of rain over 22.3 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 72% and peaks near 77% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
166
266
367
467
568
668
769
870
970
1071
1171
1272
1372
1472
1572
1672
1772
1873
1973
2073
2173
2273
2374
2474
2574
2675
2775
2875
2976
3077
3177

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 53% of days. Sticky, muggy-or-worse air turns up on roughly 84% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1181632430
2181531450
3171531460
4171530471
5171529481
6161429491
7061428511
8061428502
9061328512
10061328512
11051327523
12051228523
13051227524
14051227524
15041228515
16041228515
17041228506
18041128516
19031127536
20031127527
21031127527
22031027537
23021026557
2402926567
2502925577
2602824597
2701824607
2801723627
2901622647
3001621657
3101520677

Wind in May

Winds average 8 km/h in May.

Across May, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 48 min at the start of May to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over May. Sunrise moves from 5:28 AM to 5:14 AM, and sunset from 6:17 PM to 6:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:286:17
212.85:276:18
312.95:266:18
412.95:266:19
512.95:256:19
612.95:246:20
712.95:246:20
813.05:236:21
913.05:236:21
1013.05:226:22
1113.05:216:22
1213.05:216:22
1313.05:206:23
1413.15:206:23
1513.15:196:24
1613.15:196:24
1713.15:196:25
1813.15:186:25
1913.15:186:26
2013.15:176:26
2113.25:176:27
2213.25:176:27
2313.25:166:28
2413.25:166:28
2513.25:166:28
2613.25:156:29
2713.25:156:29
2813.25:156:30
2913.35:156:30
3013.35:156:31
3113.35:146:31

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.29 kWh/m².

For context, solar energy here swings from a low near 2.06 kWh/m² to a high of 4.43 kWh/m² in August across the year — May's 4.29 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.2Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
314.3Bright
Planning a trip in May

Hazard calendar for Thị Trấn Nước Hai

In seasonPeak

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

Thị Trấn Nước Hai'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 Thị Trấn Nước Hai?

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

4.3
Sightseeing
8th-best month of the year
4.8
Beach & pool
4th-best month of the year

May is a reasonable time to visit Thị Trấn Nước Hai for sightseeing.

What to pack for Thị Trấn Nước Hai in May

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

In May, Thị Trấn Nước Hai sees daytime highs around 28°C and nights near 21°C. Pack light clothes and rain gear. About 22 days see rain.

light clothesrain gear

UV index in Thị Trấn Nước Hai 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 Thị Trấn Nước Hai peaks around June 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highVery highExtremeVery highHighJun 22UV 13Dec 22UV 6
UV index (midday)Level
Jan6High
Feb8Very high
Mar11Extreme
Apr8Very high
May9Very high
Jun13Extreme
Jul13Extreme
Aug11Extreme
Sep9Very high
Oct7Very high
Nov6High
Dec6High

Air quality in Thị Trấn Nước Hai 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 Thị Trấn Nước Hai is worst in April — around 44 µg/m³ PM2.5 (poor), about 2.2× the cleanest month (July, 20 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorApr 944 µg/m³Jul 2020 µg/m³
PM2.5 (µg/m³)Level
Jan39Poor
Feb41Poor
Mar44Poor
Apr44Poor
May30Moderate
Jun23Moderate
Jul20Moderate
Aug21Moderate
Sep24Moderate
Oct28Moderate
Nov33Moderate
Dec39Poor
Location & terrain

Where is Thị Trấn Nước Hai?

Thị Trấn Nước Hai sits at 22.7°N, 106.2°E, 204 m above sea level, in Vietnam. The nearest listed city is Cao Bằng, 13 km away.

Lạng SơnHà GiangThái NguyênThị Trấn Đại Từ

Topography around Thị Trấn Nước Hai

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Thị Trấn Nước Hai.

Within 3 km, the terrain around Thị Trấn Nước Hai has significant variations in elevation — a maximum elevation change of 291 m around an average of 242 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 871 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,796 m.

The land around Thị Trấn Nước Hai is covered by trees (67%) and cropland (27%) within 3 km, trees (83%) within 16 km, and trees (89%) within 80 km.

3 km
291 m
16 km
871 m
80 km
1,796 m
treesgrasslandcroplandartificial surfaces
May weather nearby: Cao Bằng 13 km · Thị Trấn Trùng Khánh 40 km · Thị Trấn Thất Khê 63 km · Bắc Kạn 73 km · Lạng Sơn 117 km · Hà Giang 120 km · Thái Nguyên 131 km · Thị Trấn Đại Từ 134 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 Thị Trấn Nước Hai (22.7374°, 106.1522°, elevation 204 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).