Viana weather in May

In May, Viana sees average daytime highs of 32°C and overnight lows near 22°C, with 15 mm of rain across 2.7 wet days and about 11.6 hours of daylight. It is the 5th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 40% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 11 h 42 min at the start of May to 11 h 30 min by month's end. Set against the rest of the year, May is Viana's 3rd-clearest and 11th-windiest month. For the whole year in context, see Viana's year-round climate.

Daytime high
32°
5th warmest
Overnight low
22°
6th coldest
Rainfall
15 mm
2.7 wet days
Daylight
11 h 36 min
6:15 AM – 5:51 PM
Cloud cover
50%
3rd clearest
Wind
6 km/h
11th windiest
Solar energy
4.74 kWh/m²
Travel score
4.9
out of 10

Viana is city and municipality of Angola.

Density
8,286/km²
people per km²
Founded
1963

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical May day in Viana reaches about 32°C in the afternoon and slips back to 22°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°C. Set against its neighbours, May runs on par with April and about 2°C warmer than June.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13224
23224
33223
43223
53223
63223
73223
83223
93223
103223
113223
123223
133223
143223
153223
163222
173222
183222
193222
203222
213222
223222
233222
243222
253222
263122
273121
283121
293121
303121
313121

How May really feels in Viana

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.

Viana weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°801112.53.5
Feb33° / 24°8110.612.33.2
Mar32° / 24°12215.512.13.1
Apr32° / 24°14217.411.83.3
May32° / 22°152.711.64.9
Jun30° / 20°0011.56.5
Jul29° / 18°0011.57.2
Aug29° / 18°20.311.76.8
Sep30° / 20°61.411.95.7
Oct31° / 22°184.312.24.9
Nov31° / 23°7812.512.43.8
Dec32° / 23°8012.512.53.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12971
23268
33466
43763
53961
64258
74555
84753
95050
105347
115644
125743
136040
146139
156337
166436
176535
186634
196733
206832
216832
226931
236931
247030
257129
267129
277129
287129
297228
307327
317426

Chance of precipitation in May

Any precipitation

Viana gets around 15 mm of rain over 2.7 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 10% and peaks near 31% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
131
228
326
424
522
620
718
817
915
1014
1112
1211
1310
149
158
167
176
185
194
204
213
222
232
242
251
261
271
280
290
300
310

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 52% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1066826
2076924
3087022
4097021
50117019
60127117
70147016
80167014
90186913
101206811
111226710
12124669
13127657
14129646
15232615
16235594
17238564
18341533
19344512
20347482
21351451
22453421
23456391
24461350
25563320
26566290
27667270
28670240
29772210
30873190
31974170

Wind in May

Winds average 6 km/h in May.

Across May, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 42 min at the start of May to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over May. Sunrise moves from 6:13 AM to 6:18 AM, and sunset from 5:54 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:135:54
211.76:135:54
311.76:135:54
411.76:135:53
511.76:135:53
611.76:135:53
711.66:145:53
811.66:145:52
911.66:145:52
1011.66:145:52
1111.66:145:52
1211.66:145:51
1311.66:145:51
1411.66:155:51
1511.66:155:51
1611.66:155:51
1711.66:155:50
1811.66:155:50
1911.66:155:50
2011.66:165:50
2111.66:165:50
2211.66:165:50
2311.66:165:50
2411.66:175:50
2511.56:175:50
2611.56:175:50
2711.56:175:50
2811.56:175:50
2911.56:185:50
3011.56:185:50
3111.56:185:50

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.74 kWh/m².

For context, solar energy here swings from a low near 4.12 kWh/m² to a high of 5.55 kWh/m² in February across the year — May's 4.74 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.5Bright
74.6Bright
84.6Bright
94.6Bright
104.7Bright
114.7Bright
124.7Bright
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 Viana

In seasonPeak

None of Viana's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Viana's rainy season runs November–April, when most of the year's rain falls.

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

Is May a good time to visit Viana?

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

4.9
Sightseeing
5th-best month of the year
7.6
Beach & pool
5th-best month of the year

May is a reasonable time to visit Viana for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Viana in May

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

In May, Viana sees daytime highs around 32°C and nights near 22°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

Sea temperature near Viana in May

The nearest coast averages about 25°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 28 km away) is warmest in March at about 28°C and coldest in August near 20°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb28Warm
Mar28Warm
Apr27Warm
May25Warm
Jun23Refreshing
Jul21Refreshing
Aug20Refreshing
Sep22Refreshing
Oct24Warm
Nov26Warm
Dec26Warm

UV index in Viana 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 Viana peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 10 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeMar 14UV 15Aug 10UV 6
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar15Extreme
Apr13Extreme
May9Very high
Jun7High
Jul6High
Aug6High
Sep10Very high
Oct11Extreme
Nov12Extreme
Dec12Extreme

Air quality in Viana 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 Viana is worst in July — around 47 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (January, 23 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateJul 1847 µg/m³Jan 1923 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb24Moderate
Mar29Moderate
Apr34Moderate
May35Moderate
Jun41Poor
Jul47Poor
Aug43Poor
Sep32Moderate
Oct27Moderate
Nov25Moderate
Dec26Moderate
Location & terrain

Where is Viana?

Viana sits at 8.9°S, 13.4°E, 128 m above sea level, in Angola. The nearest listed city is Mulenvos, 6.0 km away.

Topography around Viana

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

Within 3 km, the terrain around Viana has only modest variations in elevation — a maximum elevation change of 69 m around an average of 121 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 165 m; within 80 km, significant variations in elevation — a maximum elevation change of 585 m.

The land around Viana is covered by artificial surfaces (87%) within 3 km, artificial surfaces (53%) and grassland (42%) within 16 km, and water (33%), grassland (29%) and trees (28%) within 80 km.

3 km
69 m
16 km
165 m
80 km
585 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Mulenvos 6.0 km · Vila Flor 11 km · Kima Kieza 12 km · Zango 12 km · Cazenga 13 km · Camama 13 km · Kilamba 13 km · Golfe 13 km

Angola travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
220 V · 50 Hz
Prices
≈ 35% of US
price level, 2025
GDP per capita
$3,129
2025
Happiness
3.8 / 10
World Happiness, 2017
Homicide rate
4.1
per 100k, 2016
Road deaths
26.1
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Very low
EF EPI 413
Religion
Roman Catholic 41%Protestant 38%none 12%other 9%

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 Viana (-8.9055°, 13.375°, elevation 128 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).