Rosário do Sul weather in May

In May, Rosário do Sul sees average daytime highs of 21°C and overnight lows near 12°C, with 114 mm of rain across 8.7 wet days and about 10.5 hours of daylight. It is the 9th-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 20°C by the end. The sky is clear or mostly clear about 33% of the time in May, and the air most often feels dry.

Daylight stretches from about 10 h 48 min at the start of May to 10 h 12 min by month's end. Set against the rest of the year, May is Rosário do Sul's 10th-clearest and 12th-windiest month. For the whole year in context, see Rosário do Sul's year-round climate.

Daytime high
21°
9th warmest
Overnight low
12°
5th coldest
Rainfall
114 mm
8.7 wet days
Daylight
10 h 30 min
8:22 AM – 6:50 PM
Cloud cover
59%
10th clearest
Wind
12 km/h
12th windiest
Solar energy
2.88 kWh/m²
Travel score
6.7
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 23°C in the first days to 20°C by the end.

A typical May day in Rosário do Sul reaches about 21°C in the afternoon and slips back to 12°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 26°C. Set against its neighbours, May runs about 4°C cooler than April and about 2°C warmer than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12313
22313
32313
42313
52313
62213
72213
82213
92213
102213
112213
122212
132212
142112
152112
162112
172112
182112
192112
202112
212112
222011
232011
242011
252011
262011
272011
282011
292011
302011
311911

How May really feels in Rosário do Sul

Once humidity and wind are folded in, May 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

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

Rosário do Sul weather by month

How May compares with the rest of the year at a glance. May is the 9th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 20°13411.513.74.5
Feb30° / 20°12910.313.14.9
Mar29° / 18°122912.25.9
Apr25° / 15°1519.311.37.0
May21° / 12°1148.710.56.7
Jun19° / 10°1309.410.16.1
Jul18° / 1299.410.26.2
Aug21° / 10°1168.610.96.8
Sep22° / 12°1559.911.86.7
Oct25° / 14°1891112.76.7
Nov28° / 16°1298.513.56.5
Dec30° / 19°1329.213.95.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 12% of May, with mostly cloudy or overcast conditions the remaining 55%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25149
35050
45050
54951
64951
74753
84654
94654
104555
114456
124456
134357
144456
154456
164357
174258
184258
194258
204456
214456
224456
234456
244456
254456
264456
274555
284555
294555
304456
314456

Chance of precipitation in May

Any precipitation

Rosário do Sul gets around 114 mm of rain over 8.7 wet days in May, the driest month. 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 30% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
130
230
329
429
529
629
728
828
928
1027
1127
1227
1327
1427
1527
1627
1727
1827
1927
2027
2127
2228
2328
2428
2528
2628
2728
2828
2928
3028
3129

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 52% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1412421131
2422420131
3432420131
4442420121
5442419121
6452419111
7462518110
8462518100
9472518100
1047251890
1148251890
1249251880
1349251880
1449251970
1550241970
1651241960
1751241960
1853231950
1953231950
2054221950
2156211940
2257211840
2358201840
2460191740
2560191740
2662181640
2763181540
2864181440
2965171340
3066171340
3167171240

Wind in May

Winds average 12 km/h in May, the calmest month.

Across May, daily wind ranges from about 12 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 10 h 48 min at the start of May to 10 h 12 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 8:12 AM to 8:31 AM, and sunset from 7:02 PM to 6:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.88:127:02
210.88:127:01
310.88:137:00
410.88:146:59
510.78:146:59
610.78:156:58
710.78:166:57
810.78:166:56
910.68:176:55
1010.68:186:54
1110.68:186:54
1210.68:196:53
1310.58:206:52
1410.58:206:52
1510.58:216:51
1610.58:226:50
1710.58:226:50
1810.48:236:49
1910.48:236:48
2010.48:246:48
2110.48:256:47
2210.48:256:47
2310.38:266:46
2410.38:276:46
2510.38:276:45
2610.38:286:45
2710.38:286:45
2810.38:296:44
2910.28:306:44
3010.28:306:44
3110.28:316:43

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 2.88 kWh/m².

For context, solar energy here swings from a low near 2.42 kWh/m² to a high of 6.95 kWh/m² in December across the year — May's 2.88 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.3Moderate
23.3Moderate
33.3Moderate
43.2Moderate
53.2Moderate
63.2Moderate
73.1Moderate
83.1Moderate
93.1Moderate
103.0Moderate
113.0Moderate
123.0Moderate
132.9Moderate
142.9Moderate
152.9Moderate
162.9Moderate
172.8Moderate
182.8Moderate
192.8Moderate
202.8Moderate
212.8Moderate
222.7Moderate
232.7Moderate
242.7Moderate
252.7Moderate
262.7Moderate
272.6Moderate
282.6Moderate
292.6Moderate
302.6Moderate
312.6Moderate
Planning a trip in May

Is May a good time to visit Rosário do Sul?

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

6.7
Sightseeing
3rd-best month of the year
4.2
Beach & pool
9th-best month of the year

May is a reasonable time to visit Rosário do Sul for sightseeing.

What to pack for Rosário do Sul in May

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

In May, Rosário do Sul sees daytime highs around 21°C and nights near 12°C. Worth packing: rain gear. About 9 days see rain.

rain gear

UV index in Rosário do Sul 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 Rosário do Sul peaks around January 18 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 18UV 13Jun 19UV 3
UV index (midday)Level
Jan13Extreme
Feb13Extreme
Mar10Very high
Apr7Very high
May4Moderate
Jun3Moderate
Jul4Moderate
Aug5Moderate
Sep7Very high
Oct7Very high
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Rosário do Sul?

Rosário do Sul sits at 30.3°S, 54.9°W, 123 m above sea level, in Brazil. The nearest listed city is São Gabriel, 58 km away.

Topography around Rosário do Sul

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

Within 3 km, the terrain around Rosário do Sul has only modest variations in elevation — a maximum elevation change of 76 m around an average of 102 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 119 m; within 80 km, significant variations in elevation — a maximum elevation change of 306 m.

The land around Rosário do Sul is covered by trees (35%), grassland (25%) and artificial surfaces (20%) within 3 km, grassland (43%) and cropland (38%) within 16 km, and grassland (55%) and cropland (31%) within 80 km.

3 km
76 m
16 km
119 m
80 km
306 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: São Gabriel 58 km · São Francisco de Assis 81 km · Dom Pedrito 84 km · Sant'Ana do Livramento 92 km · Rivera 94 km · Alegrete 100 km · São Pedro do Sul 100 km · Santiago 119 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 Rosário do Sul (-30.2583°, -54.9142°, elevation 123 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).