Arroio Grande weather in May

In May, Arroio Grande sees average daytime highs of 20°C and overnight lows near 13°C, with 96 mm of rain across 9 wet days and about 10.4 hours of daylight. It is the 8th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 18°C by the end. The sky is clear or mostly clear about 29% of the time in May, and the air most often feels dry.

Daylight stretches from about 10 h 42 min at the start of May to 10 h 06 min by month's end. Set against the rest of the year, May is Arroio Grande's 9th-clearest and 12th-windiest month. For the whole year in context, see Arroio Grande's year-round climate.

Daytime high
20°
8th warmest
Overnight low
13°
5th coldest
Rainfall
96 mm
9 wet days
Daylight
10 h 24 min
8:18 AM – 6:39 PM
Cloud cover
61%
9th clearest
Wind
13 km/h
12th windiest
Solar energy
2.73 kWh/m²
Travel score
6.4
out of 10

Arroio Grande is human settlement in Brazil.

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 21°C in the first days to 18°C by the end.

A typical May day in Arroio Grande reaches about 20°C in the afternoon and slips back to 13°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 24°C. Set against its neighbours, May runs about 4°C cooler than April and about 3°C warmer than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12114
22114
32114
42114
52114
62114
72114
82113
92013
102013
112013
122013
132013
142013
152013
162013
172013
181913
191913
201912
211912
221912
231912
241912
251912
261912
271812
281812
291811
301811
311811

Arroio Grande weather by month

How May compares with the rest of the year at a glance. May is the 8th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 20°11110.613.96.3
Feb27° / 20°10711.213.26.1
Mar26° / 19°1039.912.26.7
Apr23° / 16°1249.811.26.9
May20° / 13°96910.46.4
Jun17° / 10°1109.39.95.5
Jul16° / 1079.310.15.3
Aug18° / 10°1078.910.86.0
Sep19° / 12°12410.211.86.0
Oct22° / 14°13310.412.86.4
Nov24° / 16°988.213.77.2
Dec27° / 18°969.514.16.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 56%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24852
34753
44852
54852
64753
74753
84852
94852
104753
114753
124654
134654
144654
154555
164357
174357
184357
194258
204159
214060
224060
234060
244060
254060
264060
274060
284060
294060
304159
314159

Chance of precipitation in May

Any precipitation

Arroio Grande gets around 96 mm of rain over 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 28% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
131
231
330
430
529
629
729
828
928
1028
1127
1227
1327
1427
1527
1627
1728
1828
1928
2028
2128
2228
2328
2429
2529
2629
2728
2828
2928
3028
3128

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 50% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
141252681
241252581
342262570
442272470
542272460
643282360
743292350
843292250
944302250
1044302240
1145302240
1245302140
1345302130
1446302130
1547292130
1647292130
1748282130
1849282030
1950272030
2052261930
2153251930
2255241830
2357231730
2457231730
2559221630
2661211530
2762211430
2864201330
2965201230
3066201130
3167201030

Wind in May

Winds average 13 km/h in May, the calmest month.

Across May, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 10 h 42 min at the start of May to 10 h 06 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 8:07 AM to 8:28 AM, and sunset from 6:52 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.78:076:52
210.78:086:51
310.78:096:50
410.78:096:49
510.68:106:48
610.68:116:47
710.68:116:46
810.68:126:45
910.58:136:45
1010.58:146:44
1110.58:146:43
1210.58:156:42
1310.48:166:41
1410.48:176:41
1510.48:176:40
1610.48:186:39
1710.38:196:39
1810.38:196:38
1910.38:206:37
2010.38:216:37
2110.28:216:36
2210.28:226:36
2310.28:236:35
2410.28:236:34
2510.28:246:34
2610.18:256:34
2710.18:256:33
2810.18:266:33
2910.18:276:32
3010.18:276:32
3110.18:286:32

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 2.73 kWh/m².

For context, solar energy here swings from a low near 2.3 kWh/m² to a high of 6.9 kWh/m² in December across the year — May's 2.73 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.2Moderate
23.1Moderate
33.1Moderate
43.1Moderate
53.0Moderate
63.0Moderate
73.0Moderate
83.0Moderate
92.9Moderate
102.9Moderate
112.9Moderate
122.8Moderate
132.8Moderate
142.8Moderate
152.8Moderate
162.7Moderate
172.7Moderate
182.7Moderate
192.6Moderate
202.6Moderate
212.6Moderate
222.6Moderate
232.6Moderate
242.5Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.5Moderate
292.5Moderate
302.5Moderate
312.4Moderate
Planning a trip in May

Is May a good time to visit Arroio Grande?

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

6.4
Sightseeing
5th-best month of the year
3.1
Beach & pool
8th-best month of the year

May is a reasonable time to visit Arroio Grande for sightseeing.

What to pack for Arroio Grande in May

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

In May, Arroio Grande sees daytime highs around 20°C and nights near 13°C. Worth packing: rain gear. About 9 days see rain.

rain gear

UV index in Arroio Grande in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Arroio Grande peaks around January 15 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighExtremeJan 15UV 12Jun 18UV 3
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar10Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep7High
Oct7High
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Arroio Grande?

Arroio Grande sits at 32.2°S, 53.1°W, 31 m above sea level, in Brazil. The nearest listed city is Jaguarão, 46 km away.

Topography around Arroio Grande

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

Within 3 km, the terrain around Arroio Grande has only modest variations in elevation — a maximum elevation change of 62 m around an average of 33 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 240 m; within 80 km, significant variations in elevation — a maximum elevation change of 480 m.

The land around Arroio Grande is covered by cropland (34%), trees (27%) and grassland (26%) within 3 km, cropland (48%), grassland (25%) and trees (24%) within 16 km, and grassland (35%), cropland (22%) and trees (20%) within 80 km.

3 km
62 m
16 km
240 m
80 km
480 m
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Jaguarão 46 km · Capão do Leão 78 km · Pelotas 87 km · Piratini 88 km · Rio Grande 96 km · Canguçu 101 km · São José do Norte 101 km · Melo 102 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 Arroio Grande (-32.2375°, -53.0869°, elevation 31 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. 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).