Sa Dec weather in May

In May, Sa Dec sees average daytime highs of 33°C and overnight lows near 26°C, with 196 mm of rain across 24.9 wet days and about 12.5 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. 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 36 min by month's end. Set against the rest of the year, May is Sa Dec's 7th-clearest and 7th-windiest month. For the whole year in context, see Sa Dec's year-round climate.

Daytime high
33°
2nd warmest
Overnight low
26°
12th coldest
Rainfall
196 mm
24.9 wet days
Daylight
12 h 30 min
5:39 AM – 6:07 PM
Cloud cover
81%
7th clearest
Wind
8 km/h
7th windiest
Solar energy
5.21 kWh/m²
Travel score
2.2
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical May day in Sa Dec 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 31°C and 35°C. Set against its neighbours, May runs about 1°C cooler than April and about 1°C warmer than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13426
23426
33426
43426
53426
63426
73426
83426
93326
103326
113326
123326
133326
143326
153326
163326
173326
183326
193326
203326
213326
223326
233326
243326
253326
263326
273226
283226
293226
303226
313226

How May really feels in Sa Dec

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.

Sa Dec weather by month

How May compares with the rest of the year at a glance. May is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°284.311.55.5
Feb31° / 23°102.111.75.1
Mar33° / 25°335.311.93.9
Apr34° / 26°7611.712.22.9
May33° / 26°19624.912.52.2
Jun32° / 26°23926.412.62.4
Jul31° / 25°23527.912.52.5
Aug31° / 25°24228.312.32.5
Sep31° / 25°26728.212.12.4
Oct31° / 25°27827.311.82.6
Nov31° / 24°13517.311.53.6
Dec30° / 23°669.311.44.8

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 10% of May, with mostly cloudy or overcast conditions the remaining 83%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23466
33268
43070
52872
62872
72575
82377
92377
102179
111981
121783
131684
141585
151387
161288
171288
181090
191090
201090
211090
22991
23892
24892
25892
26991
27991
28991
29991
30991
31991

Chance of precipitation in May

Any precipitation

Sa Dec gets around 196 mm of rain over 24.9 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 79% and peaks near 89% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
157
259
361
463
565
667
769
871
973
1075
1176
1278
1379
1481
1582
1683
1785
1885
1986
2087
2187
2288
2388
2488
2588
2688
2789
2889
2989
3089
3189

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 92% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
12278
22179
31981
41882
51684
61585
71387
81288
91189
101090
11991
12892
13793
14694
15694
16595
17496
18496
19496
20397
21397
22397
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
239calm
249calm
259calm
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 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over May. Sunrise moves from 5:43 AM to 5:38 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)
112.45:436:05
212.45:436:05
312.45:436:05
412.45:426:05
512.45:426:05
612.45:426:06
712.45:416:06
812.45:416:06
912.45:416:06
1012.45:406:06
1112.45:406:06
1212.45:406:07
1312.55:406:07
1412.55:406:07
1512.55:396:07
1612.55:396:07
1712.55:396:08
1812.55:396:08
1912.55:396:08
2012.55:386:08
2112.55:386:08
2212.55:386:09
2312.55:386:09
2412.55:386:09
2512.55:386:09
2612.55:386:10
2712.55:386:10
2812.55:386:10
2912.55:386:10
3012.55:386:11
3112.65:386:11

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.21 kWh/m².

For context, solar energy here swings from a low near 4.23 kWh/m² to a high of 5.99 kWh/m² in March across the year — May's 5.21 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.6Bright
45.6Bright
55.5Bright
65.5Bright
75.5Bright
85.4Bright
95.4Bright
105.3Bright
115.3Bright
125.3Bright
135.2Bright
145.2Bright
155.2Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in May

Hazard calendar for Sa Dec

In seasonPeak

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

Sa Dec sits in the Pacific typhoon belt; the season peaks July–October.

Sa Dec'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 Sa Dec?

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 Sa Dec.

What to pack for Sa Dec in May

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

In May, Sa Dec sees daytime highs around 33°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

UV index in Sa Dec 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 Sa Dec peaks around August 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 22UV 13Dec 11UV 9
UV index (midday)Level
Jan10Very high
Feb11Extreme
Mar13Extreme
Apr12Extreme
May12Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep13Extreme
Oct9Very high
Nov9Very high
Dec9Very high

Air quality in Sa Dec 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 Sa Dec is worst in January — around 72 µg/m³ PM2.5 (unhealthy), about 2.4× the cleanest month (August, 30 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyJan 1172 µg/m³Aug 1331 µg/m³
PM2.5 (µg/m³)Level
Jan72Unhealthy
Feb59Unhealthy
Mar53Poor
Apr53Poor
May47Poor
Jun38Poor
Jul34Moderate
Aug30Moderate
Sep40Poor
Oct56Unhealthy
Nov68Unhealthy
Dec70Unhealthy
Location & terrain

Where is Sa Dec?

Sa Dec sits at 10.3°N, 105.8°E, 1 m above sea level, in Vietnam. The nearest listed city is Quận Đức Thịnh, 3.0 km away.

Topography around Sa Dec

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

Within 3 km, the terrain around Sa Dec has only modest variations in elevation — a maximum elevation change of 10 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 16 m; within 80 km, only modest variations in elevation — a maximum elevation change of 210 m.

The land around Sa Dec is covered by trees (31%), artificial surfaces (29%) and cropland (21%) within 3 km, trees (45%) and cropland (40%) within 16 km, and cropland (63%) and trees (30%) within 80 km.

3 km
10 m
16 km
16 m
80 km
210 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Quận Đức Thịnh 3.0 km · Lai Vung 18 km · Cao Lãnh 23 km · Vĩnh Long 24 km · Bình Thủy 24 km · Thốt Nốt 24 km · Ô Môn 25 km · Bình Minh 26 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 Sa Dec (10.2909°, 105.7563°, elevation 1 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).