Porto Alegre weather in April

In April, Porto Alegre sees average daytime highs of 26°C and overnight lows near 17°C, with 106 mm of rain across 9.2 wet days and about 11.3 hours of daylight. It is the 6th-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 24°C by the end. The sky is clear or mostly clear about 32% of the time in April, and the air most often feels humid.

Daylight stretches from about 11 h 42 min at the start of April to 10 h 54 min by month's end. Set against the rest of the year, April is Porto Alegre's 5th-clearest and 10th-windiest month. For the whole year in context, see Porto Alegre's year-round climate.

Daytime high
26°
6th warmest
Overnight low
17°
7th coldest
Rainfall
106 mm
9.2 wet days
Daylight
11 h 18 min
7:47 AM – 7:03 PM
Cloud cover
58%
5th clearest
Wind
10 km/h
10th windiest
Solar energy
3.78 kWh/m²
Travel score
6.8
out of 10

Porto Alegre is human settlement in Brazil.

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 27°C in the first days to 24°C by the end.

A typical April day in Porto Alegre reaches about 26°C in the afternoon and slips back to 17°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 30°C. Set against its neighbours, April runs about 3°C cooler than March and about 4°C warmer than May.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12718
22718
32718
42718
52718
62718
72718
82718
92618
102617
112617
122617
132617
142617
152617
162617
172517
182516
192516
202516
212516
222516
232516
242416
252416
262416
272415
282415
292415
302415

How April really feels in Porto Alegre

Once humidity and wind are folded in, April 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

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

Porto Alegre weather by month

How April compares with the rest of the year at a glance. April is the 6th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 21°13714.113.74.6
Feb30° / 21°12613.313.14.6
Mar28° / 20°11211.912.25.7
Apr26° / 17°1069.211.36.8
May22° / 13°1079.210.56.7
Jun20° / 11°1139.210.16.2
Jul19° / 10°1401010.36.1
Aug21° / 11°12010.210.96.5
Sep22° / 13°14611.111.86.4
Oct24° / 16°17012.512.76.4
Nov27° / 17°12310.813.56.4
Dec29° / 20°12511.713.95.2

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 17% of April, with mostly cloudy or overcast conditions the remaining 51%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25248
35248
45248
55149
65149
75248
85149
95149
105050
115050
125050
135050
144951
154951
164753
174753
184654
194654
204654
214753
224753
234753
244753
254753
264753
274753
284852
294753
304753

Chance of precipitation in April

Any precipitation

Porto Alegre gets around 106 mm of rain over 9.2 wet days in April, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 31% and peaks near 32% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
132
231
331
431
531
631
731
831
931
1031
1131
1231
1331
1431
1531
1631
1731
1831
1931
2031
2131
2230
2330
2430
2530
2630
2729
2829
2929
3029

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the humid band about 32% of days. Sticky, muggy-or-worse air turns up on roughly 35% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1515294011
2516293911
3516293910
4617293810
5617303710
6617303610
7717303510
8817313510
9817313410
1091831339
11101831329
12101832319
13111832308
14121932298
15121933298
16131933287
17142033277
18142033267
19152034256
20162134246
21162134235
22172234235
23182234224
24192334214
25192334204
26202434193
27212434183
28222434183
29232434172
30242433162

Wind in April

Winds average 10 km/h in April.

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

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 11 h 42 min at the start of April to 10 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over April. Sunrise moves from 7:38 AM to 7:56 AM, and sunset from 7:21 PM to 6:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.77:387:21
211.77:387:20
311.77:397:19
411.67:407:18
511.67:407:16
611.67:417:15
711.57:417:14
811.57:427:13
911.57:437:12
1011.57:437:10
1111.47:447:09
1211.47:447:08
1311.47:457:07
1411.37:467:06
1511.37:467:05
1611.37:477:03
1711.27:487:02
1811.27:487:01
1911.27:497:00
2011.27:496:59
2111.17:506:58
2211.17:516:57
2311.17:516:56
2411.07:526:55
2511.07:536:54
2611.07:536:53
2711.07:546:52
2810.97:556:51
2910.97:556:50
3010.97:566:49

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 3.78 kWh/m².

For context, solar energy here swings from a low near 2.39 kWh/m² to a high of 6.58 kWh/m² in December across the year — April's 3.78 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.3Bright
34.3Bright
44.3Bright
54.2Bright
64.2Bright
74.1Bright
84.1Bright
94.0Bright
104.0Bright
114.0Moderate
123.9Moderate
133.9Moderate
143.8Moderate
153.8Moderate
163.8Moderate
173.7Moderate
183.7Moderate
193.6Moderate
203.6Moderate
213.6Moderate
223.5Moderate
233.5Moderate
243.5Moderate
253.4Moderate
263.4Moderate
273.4Moderate
283.3Moderate
293.3Moderate
303.3Moderate
Planning a trip in April

Is April a good time to visit Porto Alegre?

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

6.8
Sightseeing
1st-best month of the year
6.4
Beach & pool
4th-best month of the year

April is a reasonable time to visit Porto Alegre for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Porto Alegre in April

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

In April, Porto Alegre sees daytime highs around 26°C and nights near 17°C. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

Sea temperature near Porto Alegre in April

The nearest coast averages about 23°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 39 km away) is warmest in February at about 26°C and coldest in July near 15°C.

It's comfortable for a long swim from Oct 23 to May 10 — about 6.6 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar25Warm
Apr23Refreshing
May19Cool
Jun17Cool
Jul15Cool
Aug16Cool
Sep17Cool
Oct20Cool
Nov22Refreshing
Dec24Warm

UV index in Porto Alegre in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Porto Alegre peaks around January 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateVery highExtremeJan 15UV 13Jun 19UV 3
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar10Very high
Apr7Very high
May4Moderate
Jun3Moderate
Jul4Moderate
Aug5Moderate
Sep8Very high
Oct8Very high
Nov11Extreme
Dec12Extreme

Air quality in Porto Alegre in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in Porto Alegre is worst in August — around 27 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateAug 1327 µg/m³Dec 2213 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar15Moderate
Apr18Moderate
May21Moderate
Jun23Moderate
Jul25Moderate
Aug27Moderate
Sep23Moderate
Oct16Moderate
Nov15Moderate
Dec13Moderate
Location & terrain

Where is Porto Alegre?

Porto Alegre sits at 30.0°S, 51.2°W, 46 m above sea level, in Brazil. The nearest listed city is Guaíba, 13 km away.

Topography around Porto Alegre

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

Within 3 km, the terrain around Porto Alegre has only modest variations in elevation — a maximum elevation change of 86 m around an average of 9 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 311 m; within 80 km, large variations in elevation — a maximum elevation change of 883 m.

The land around Porto Alegre is covered by artificial surfaces (42%) and water (35%) within 3 km, artificial surfaces (29%) and trees (26%) within 16 km, and trees (43%) and grassland (21%) within 80 km.

3 km
86 m
16 km
311 m
80 km
883 m
treesgrasslandcroplandartificial surfaceswaterwetland
April weather nearby: Guaíba 13 km · Canoas 14 km · Alvorada 15 km · Cachoeirinha 16 km · Esteio 20 km · Nova Santa Rita 21 km · Viamão 21 km · Gravataí 25 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

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 Porto Alegre (-30.0328°, -51.2302°, elevation 46 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).