Rio Brilhante weather in May

In May, Rio Brilhante sees average daytime highs of 27°C and overnight lows near 17°C, with 76 mm of rain across 7.7 wet days and about 11 hours of daylight. It is the 10th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 29°C in the first days to 26°C by the end. The sky is clear or mostly clear about 45% of the time in May, and the air most often feels humid.

Daylight stretches from about 11 h 12 min at the start of May to 10 h 48 min by month's end. Set against the rest of the year, May is Rio Brilhante's 6th-clearest and 6th-windiest month. For the whole year in context, see Rio Brilhante's year-round climate.

Daytime high
27°
10th warmest
Overnight low
17°
4th coldest
Rainfall
76 mm
7.7 wet days
Daylight
11 hours
7:06 AM – 6:03 PM
Cloud cover
49%
6th clearest
Wind
9 km/h
6th windiest
Solar energy
3.86 kWh/m²
Travel score
6.9
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 29°C in the first days to 26°C by the end.

A typical May day in Rio Brilhante reaches about 27°C in the afternoon and slips back to 17°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 32°C. Set against its neighbours, May runs about 3°C cooler than April and on par with June.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12918
22918
32918
42818
52818
62818
72818
82818
92817
102817
112717
122717
132717
142717
152717
162717
172717
182717
192717
202617
212617
222616
232616
242616
252616
262616
272616
282616
292616
302616
312616

How May really feels in Rio Brilhante

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.

Rio Brilhante weather by month

How May compares with the rest of the year at a glance. May is the 10th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°18219.713.23.2
Feb32° / 22°14217.212.73.3
Mar32° / 22°11414.912.23.7
Apr30° / 20°688.611.55.1
May27° / 17°767.7116.9
Jun26° / 16°515.710.77.5
Jul27° / 15°374.710.87.7
Aug29° / 17°424.711.36.3
Sep31° / 19°827.711.94.9
Oct32° / 21°1201312.53.9
Nov32° / 21°13713.8133.7
Dec32° / 22°15417.613.33.3

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 42%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26337
36238
46139
56139
66040
75941
85842
95842
105743
115743
125743
135743
145644
155644
165743
175743
185743
195842
205842
215842
225842
235941
245842
255842
265842
275842
285842
295842
305842
315842

Chance of precipitation in May

Any precipitation

Rio Brilhante gets around 76 mm of rain over 7.7 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 24% and peaks near 29% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
120
220
320
420
520
621
721
821
921
1022
1122
1222
1323
1423
1524
1625
1726
1826
1927
2027
2127
2228
2328
2428
2528
2629
2729
2828
2928
3028
3127

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 24% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1121935295
2132036274
3132037264
4142037253
5152137243
6152137243
7162137232
8162237232
9172237222
10182236222
11182236222
12192235222
13202334221
14202334221
15212333221
16212332221
17222331221
18232431221
19232430212
20242429212
21242529212
22252528202
23252528202
24252627202
25252627202
26252727192
27252727192
28252727192
29252827182
30242828182
31242928181

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 12 min at the start of May to 10 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over May. Sunrise moves from 6:59 AM to 7:12 AM, and sunset from 6:12 PM to 5:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.26:596:12
211.27:006:11
311.27:006:10
411.27:006:10
511.17:016:09
611.17:016:08
711.17:026:08
811.17:026:07
911.17:036:07
1011.17:036:06
1111.07:036:06
1211.07:046:05
1311.07:046:05
1411.07:056:04
1511.07:056:04
1611.07:066:03
1710.97:066:03
1810.97:066:02
1910.97:076:02
2010.97:076:02
2110.97:086:01
2210.97:086:01
2310.97:096:01
2410.97:096:00
2510.87:106:00
2610.87:106:00
2710.87:106:00
2810.87:115:59
2910.87:115:59
3010.87:125:59
3110.87:125:59

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.86 kWh/m².

For context, solar energy here swings from a low near 3.49 kWh/m² to a high of 6.18 kWh/m² in December across the year — May's 3.86 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.2Bright
74.2Bright
84.1Bright
94.1Bright
104.1Bright
114.0Bright
124.0Moderate
134.0Moderate
143.9Moderate
153.9Moderate
163.9Moderate
173.8Moderate
183.8Moderate
193.8Moderate
203.7Moderate
213.7Moderate
223.7Moderate
233.6Moderate
243.6Moderate
253.6Moderate
263.6Moderate
273.5Moderate
283.5Moderate
293.5Moderate
303.5Moderate
313.5Moderate
Planning a trip in May

Hazard calendar for Rio Brilhante

In seasonPeak

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

Rio Brilhante's rainy season runs October–March, 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 Rio Brilhante?

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

6.9
Sightseeing
3rd-best month of the year
7.2
Beach & pool
5th-best month of the year

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

What to pack for Rio Brilhante in May

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

In May, Rio Brilhante sees daytime highs around 27°C and nights near 17°C. Pack light clothes. About 8 days see rain.

light clothes

UV index in Rio Brilhante in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Rio Brilhante peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 14 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 highHighVery highModerateExtremeJan 19UV 15Sep 14UV 3
UV index (midday)Level
Jan16Extreme
Feb14Extreme
Mar13Extreme
Apr10Very high
May7Very high
Jun6High
Jul6High
Aug8Very high
Sep3Moderate
Oct12Extreme
Nov12Extreme
Dec13Extreme

Air quality in Rio Brilhante 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 Rio Brilhante is worst in September — around 25 µg/m³ PM2.5 (moderate), about 4.6× the cleanest month (April, 5 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1623 µg/m³Apr 105 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb7Good
Mar6Good
Apr5Good
May6Good
Jun6Good
Jul6Good
Aug14Moderate
Sep25Moderate
Oct14Moderate
Nov8Good
Dec7Good
Location & terrain

Where is Rio Brilhante?

Rio Brilhante sits at 21.8°S, 54.5°W, 319 m above sea level, in Brazil. The nearest listed city is Itaporã, 40 km away.

Topography around Rio Brilhante

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

Within 3 km, the terrain around Rio Brilhante has only modest variations in elevation — a maximum elevation change of 39 m around an average of 312 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 126 m; within 80 km, significant variations in elevation — a maximum elevation change of 312 m.

The land around Rio Brilhante is covered by cropland (38%), trees (25%) and artificial surfaces (20%) within 3 km, cropland (60%) and trees (21%) within 16 km, and cropland (64%) within 80 km.

3 km
39 m
16 km
126 m
80 km
312 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Itaporã 40 km · Nova Alvorada do Sul 41 km · Dourados 54 km · Fátima do Sul 64 km · Maracaju 68 km · Caarapó 97 km · Sidrolândia 106 km · Nova Andradina 133 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 Rio Brilhante (-21.8019°, -54.5464°, elevation 319 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. 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).