Balneário Arroio do Silva weather in May

In May, Balneário Arroio do Silva sees average daytime highs of 21°C and overnight lows near 16°C, with 130 mm of rain across 11.1 wet days and about 10.6 hours of daylight. It is the 8th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 20°C by the end. The sky is clear or mostly clear about 42% of the time in May, and the air most often feels humid.

Daylight stretches from about 10 h 54 min at the start of May to 10 h 18 min by month's end. Set against the rest of the year, May is Balneário Arroio do Silva's 3rd-clearest and 9th-windiest month. For the whole year in context, see Balneário Arroio do Silva's year-round climate.

Daytime high
21°
8th warmest
Overnight low
16°
5th coldest
Rainfall
130 mm
11.1 wet days
Daylight
10 h 36 min
7:57 AM – 6:31 PM
Cloud cover
52%
3rd clearest
Wind
11 km/h
9th windiest
Solar energy
3.14 kWh/m²
Travel score
6.4
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 22°C in the first days to 20°C by the end.

A typical May day in Balneário Arroio do Silva reaches about 21°C in the afternoon and slips back to 16°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 24°C. Set against its neighbours, May runs about 3°C cooler than April and about 2°C warmer than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12217
22217
32217
42217
52217
62217
72217
82217
92117
102117
112116
122116
132116
142116
152116
162116
172116
182116
192116
202116
212016
222015
232015
242015
252015
262015
272015
282015
292015
302015
312015

Balneário Arroio do Silva weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 22°18920.313.65.2
Feb26° / 22°15619.5135.0
Mar26° / 21°13618.112.25.6
Apr24° / 19°10012.411.36.6
May21° / 16°13011.110.66.4
Jun19° / 14°9910.210.26.2
Jul18° / 13°11010.110.36.1
Aug19° / 14°10410116.3
Sep20° / 15°13212.511.85.9
Oct22° / 17°15215.912.75.6
Nov23° / 18°13514.913.46.1
Dec25° / 20°13916.413.85.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 42%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25743
35743
45743
55743
65743
75842
85842
95842
105842
115842
125842
135842
145842
155842
165743
175743
185842
195842
205941
215941
225941
236040
246040
256040
266040
276040
285941
295941
305941
315941

Chance of precipitation in May

Any precipitation

Balneário Arroio do Silva gets around 130 mm of rain over 11.1 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 36% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
138
238
337
437
537
637
737
837
937
1037
1137
1237
1337
1437
1537
1637
1736
1836
1936
2035
2135
2235
2335
2434
2534
2634
2734
2834
2934
3033
3133

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the humid band about 33% of days. Sticky, muggy-or-worse air turns up on roughly 12% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1152139222
2162239212
3162439202
4162538191
5172638181
6172737171
7182837161
8182937161
9193036151
10193036141
11203135130
12203235130
13203235120
14213234120
15213334120
16223334110
17233333110
18243333110
19253332100
20263332100
2127323190
2229323180
2330323080
2431322970
2533322870
2634322860
2735322760
2836322650
2937322550
3038322550
3139322550

Wind in May

Winds average 11 km/h in May.

Across May, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 10 h 54 min at the start of May to 10 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over May. Sunrise moves from 7:48 AM to 8:06 AM, and sunset from 6:42 PM to 6:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.97:486:42
210.97:486:41
310.97:496:40
410.87:506:39
510.87:506:38
610.87:516:38
710.87:526:37
810.77:526:36
910.77:536:35
1010.77:536:35
1110.77:546:34
1210.67:556:33
1310.67:556:33
1410.67:566:32
1510.67:576:31
1610.67:576:31
1710.57:586:30
1810.57:586:29
1910.57:596:29
2010.58:006:28
2110.58:006:28
2210.48:016:27
2310.48:016:27
2410.48:026:27
2510.48:036:26
2610.48:036:26
2710.48:046:25
2810.38:046:25
2910.38:056:25
3010.38:056:24
3110.38:066:24

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.14 kWh/m².

For context, solar energy here swings from a low near 2.72 kWh/m² to a high of 6.48 kWh/m² in December across the year — May's 3.14 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.5Moderate
23.5Moderate
33.5Moderate
43.5Moderate
53.4Moderate
63.4Moderate
73.4Moderate
83.3Moderate
93.3Moderate
103.3Moderate
113.2Moderate
123.2Moderate
133.2Moderate
143.2Moderate
153.1Moderate
163.1Moderate
173.1Moderate
183.1Moderate
193.1Moderate
203.0Moderate
213.0Moderate
223.0Moderate
233.0Moderate
243.0Moderate
253.0Moderate
263.0Moderate
272.9Moderate
282.9Moderate
292.9Moderate
302.9Moderate
312.9Moderate
Planning a trip in May

Is May a good time to visit Balneário Arroio do Silva?

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

6.4
Sightseeing
2nd-best month of the year
3.9
Beach & pool
7th-best month of the year

May is a reasonable time to visit Balneário Arroio do Silva for sightseeing.

What to pack for Balneário Arroio do Silva in May

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

In May, Balneário Arroio do Silva sees daytime highs around 21°C and nights near 16°C. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Balneário Arroio do Silva in May

The nearest coast averages about 21°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 16 km away) is warmest in February at about 25°C and coldest in August near 17°C.

It's comfortable for a long swim from Nov 1 to May 27 — about 6.8 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan24Warm
Feb25Warm
Mar25Warm
Apr23Refreshing
May21Refreshing
Jun19Cool
Jul17Cool
Aug17Cool
Sep18Cool
Oct19Cool
Nov21Refreshing
Dec23Refreshing

UV index in Balneário Arroio do Silva in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Balneário Arroio do Silva peaks around January 18 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 18UV 13Jun 21UV 4
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar10Extreme
Apr8Very high
May5Moderate
Jun4Moderate
Jul4Moderate
Aug6High
Sep8Very high
Oct10Very high
Nov12Extreme
Dec12Extreme
Location & terrain

Where is Balneário Arroio do Silva?

Balneário Arroio do Silva sits at 29.0°S, 49.4°W, 1 m above sea level, in Brazil. The nearest listed city is Araranguá, 9.0 km away.

Topography around Balneário Arroio do Silva

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Balneário Arroio do Silva.

Within 3 km, the terrain around Balneário Arroio do Silva has only modest variations in elevation — a maximum elevation change of 18 m around an average of 5 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 259 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,577 m.

The land around Balneário Arroio do Silva is covered by water (39%) and grassland (23%) within 3 km, water (49%) within 16 km, and trees (34%), water (32%) and grassland (21%) within 80 km.

3 km
18 m
16 km
259 m
80 km
1,577 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Araranguá 9.0 km · Sombrio 24 km · Balneário Gaivota 25 km · Balneário Rincão 25 km · Forquilhinha 27 km · Içara 32 km · Criciúma 35 km · Morro da Fumaça 42 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 Balneário Arroio do Silva (-28.9869°, -49.4173°, 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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).