Thới Lai weather in May

In May, Thới Lai sees average daytime highs of 33°C and overnight lows near 26°C, with 207 mm of rain across 25.5 wet days and about 12.5 hours of daylight. It is the 3rd-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 34°C in the first days to 32°C by the end. The sky is clear or mostly clear about 6% of the time in May, and the air most often feels miserable.

Daylight stretches from about 12 h 24 min at the start of May to 12 h 30 min by month's end. Set against the rest of the year, May is Thới Lai's 7th-clearest and 9th-windiest month. For the whole year in context, see Thới Lai's year-round climate.

Daytime high
33°
3rd warmest
Overnight low
26°
12th coldest
Rainfall
207 mm
25.5 wet days
Daylight
12 h 30 min
5:40 AM – 6:08 PM
Cloud cover
82%
7th clearest
Wind
8 km/h
9th windiest
Solar energy
5.15 kWh/m²
Travel score
2.2
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 34°C in the first days to 32°C by the end.

A typical May day in Thới Lai reaches about 33°C in the afternoon and slips back to 26°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 35°C. Set against its neighbours, May runs about 1°C cooler than April and about 2°C warmer than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13426
23426
33426
43426
53426
63426
73426
83326
93326
103326
113326
123326
133326
143326
153326
163326
173326
183326
193326
203326
213326
223226
233226
243226
253226
263226
273226
283226
293226
303226
313226

How May really feels in Thới Lai

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
31 feel dangerously hot (≥ 39°C)
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.

Thới Lai weather by month

How May compares with the rest of the year at a glance. May is the 3rd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°274.411.55.5
Feb31° / 23°132.311.75.0
Mar33° / 25°395.911.93.7
Apr34° / 26°8512.512.22.8
May33° / 26°20725.512.52.2
Jun31° / 25°24527.312.62.4
Jul31° / 25°25428.312.52.6
Aug31° / 25°24828.712.32.5
Sep31° / 25°2752812.12.4
Oct31° / 25°29327.611.82.5
Nov31° / 24°14217.711.53.5
Dec30° / 23°689.311.44.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 9% of May, with mostly cloudy or overcast conditions the remaining 84%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23169
33169
42872
52773
62674
72476
82377
92179
102080
111882
121684
131585
141486
151387
161189
171189
18991
19991
20991
21991
22892
23892
24892
25892
26892
27892
28892
29892
30892
31892

Chance of precipitation in May

Any precipitation

Thới Lai gets around 207 mm of rain over 25.5 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 81% and peaks near 92% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
159
261
363
465
567
669
771
873
975
1076
1178
1280
1381
1483
1584
1685
1786
1887
1988
2089
2189
2290
2390
2490
2591
2691
2791
2891
2992
3092
3192

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 91% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
12872
22674
32575
42377
52179
61981
71882
81684
91486
101387
111288
121090
13991
14892
15793
16694
17595
18496
19496
20397
21397
22298
23298
24298
25298
26298
27298
28199
29199
30199
31199

Wind in May

Winds average 8 km/h in May.

Across May, 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
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 24 min at the start of May to 12 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over May. Sunrise moves from 5:44 AM to 5:39 AM, and sunset from 6:05 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:446:05
212.45:446:06
312.45:446:06
412.45:436:06
512.45:436:06
612.45:436:06
712.45:426:06
812.45:426:06
912.45:426:07
1012.45:426:07
1112.45:416:07
1212.45:416:07
1312.45:416:07
1412.45:416:07
1512.55:406:08
1612.55:406:08
1712.55:406:08
1812.55:406:08
1912.55:406:08
2012.55:406:09
2112.55:396:09
2212.55:396:09
2312.55:396:09
2412.55:396:10
2512.55:396:10
2612.55:396:10
2712.55:396:10
2812.55:396:11
2912.55:396:11
3012.55:396:11
3112.55:396:11

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.15 kWh/m².

For context, solar energy here swings from a low near 4.17 kWh/m² to a high of 5.97 kWh/m² in March across the year — May's 5.15 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.6Bright
35.6Bright
45.5Bright
55.5Bright
65.5Bright
75.4Bright
85.4Bright
95.3Bright
105.3Bright
115.2Bright
125.2Bright
135.2Bright
145.1Bright
155.1Bright
165.1Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in May

Hazard calendar for Thới Lai

In seasonPeak

In May, Thới Lai sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

Thới Lai sits in the Pacific typhoon belt; the season peaks July–October.

Thới Lai's rainy season runs May–November, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Thới Lai?

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

2.2
Sightseeing
12th-best month of the year
4.0
Beach & pool
7th-best month of the year

May is a weaker month for outdoor sightseeing in Thới Lai.

What to pack for Thới Lai in May

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

In May, Thới Lai sees daytime highs around 33°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

UV index in Thới Lai in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Thới Lai peaks around September 9 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highSep 9UV 13Dec 19UV 9
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar13Extreme
Apr12Extreme
May12Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep13Extreme
Oct9Very high
Nov9Very high
Dec9Very high

Air quality in Thới Lai 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 Thới Lai is worst in December — around 57 µg/m³ PM2.5 (unhealthy), about 2.1× the cleanest month (August, 27 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorUnhealthyDec 1556 µg/m³Aug 1327 µg/m³
PM2.5 (µg/m³)Level
Jan51Poor
Feb40Poor
Mar38Poor
Apr39Poor
May37Poor
Jun32Moderate
Jul30Moderate
Aug27Moderate
Sep35Poor
Oct49Poor
Nov53Poor
Dec57Unhealthy
Location & terrain

Where is Thới Lai?

Thới Lai sits at 10.1°N, 105.6°E, 6 m above sea level, in Vietnam. The nearest listed city is Ô Môn, 9.0 km away.

Topography around Thới Lai

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

Within 3 km, the terrain around Thới Lai has only modest variations in elevation — a maximum elevation change of 9 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 14 m; within 80 km, large variations in elevation — a maximum elevation change of 677 m.

The land around Thới Lai is covered by cropland (67%) and trees (20%) within 3 km, cropland (64%) and trees (27%) within 16 km, and cropland (63%) and trees (25%) within 80 km.

3 km
9 m
16 km
14 m
80 km
677 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Ô Môn 9.0 km · Phong Điền 14 km · Cờ Đỏ 15 km · Bình Thủy 20 km · Lai Vung 22 km · Cái Răng 22 km · Thốt Nốt 23 km · Vĩnh Thạnh 25 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 Thới Lai (10.0652°, 105.5586°, elevation 6 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).