Rosana weather in May

In May, Rosana sees average daytime highs of 26°C and overnight lows near 18°C, with 89 mm of rain across 7.6 wet days and about 10.9 hours of daylight. It is the 10th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 25°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 42 min by month's end. Set against the rest of the year, May is Rosana's 6th-clearest and 7th-windiest month. For the whole year in context, see Rosana's year-round climate.

Daytime high
26°
10th warmest
Overnight low
18°
4th coldest
Rainfall
89 mm
7.6 wet days
Daylight
10 h 54 min
8:01 AM – 6:56 PM
Cloud cover
49%
6th clearest
Wind
9 km/h
7th windiest
Solar energy
3.81 kWh/m²
Travel score
7.3
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 27°C in the first days to 25°C by the end.

A typical May day in Rosana reaches about 26°C in the afternoon and slips back to 18°C overnight — a 8°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, May runs about 3°C cooler than April and about 1°C warmer than June.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12819
22719
32719
42719
52719
62719
72719
82719
92619
102618
112618
122618
132618
142618
152618
162618
172518
182518
192518
202518
212517
222517
232517
242517
252517
262517
272517
282517
292517
302517
312517

How May really feels in Rosana

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.

Rosana weather by month

How May compares with the rest of the year at a glance. May is the 10th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 24°18819.713.23.4
Feb31° / 23°16017.612.83.5
Mar31° / 23°12715.112.24.2
Apr29° / 21°697.611.55.9
May26° / 18°897.610.97.3
Jun25° / 17°596.110.67.8
Jul25° / 16°434.910.88.0
Aug27° / 17°434.411.27.7
Sep29° / 19°857.911.96.0
Oct30° / 21°13013.212.54.6
Nov31° / 22°13113.313.14.3
Dec31° / 23°16517.213.43.7

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 12% of May, with mostly cloudy or overcast conditions the remaining 43%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16238
26238
36238
46139
56040
66040
75941
85743
95743
105644
115644
125644
135644
145545
155545
165545
175545
185545
195545
205545
215545
225545
235545
245644
255644
265644
275644
285644
295644
305644
315743

Chance of precipitation in May

Any precipitation

Rosana gets around 89 mm of rain over 7.6 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 28% 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
1021
1121
1222
1322
1422
1523
1623
1724
1825
1925
2026
2126
2227
2327
2427
2528
2628
2728
2828
2928
3028
3128

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 36% of days. Sticky, muggy-or-worse air turns up on roughly 31% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
171133409
271234398
381334387
481435376
581535375
691635364
791735364
891835353
991935343
1092035333
1192135322
1292136322
1392236312
14102336302
15102336292
16102436282
17102437281
18102537271
19112537261
20112537252
21122637242
22122637232
23132637222
24142637222
25142637212
26152637202
27152637202
28152637202
29162637192
30162637192
31162637192

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 9 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
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
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 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over May. Sunrise moves from 7:54 AM to 8:08 AM, and sunset from 7:05 PM to 6:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.27:547:05
211.27:557:04
311.17:557:03
411.17:557:03
511.17:567:02
611.17:567:01
711.17:577:01
811.07:577:00
911.07:587:00
1011.07:586:59
1111.07:596:59
1211.07:596:58
1311.08:006:57
1411.08:006:57
1510.98:006:57
1610.98:016:56
1710.98:016:56
1810.98:026:55
1910.98:026:55
2010.98:036:54
2110.88:036:54
2210.88:046:54
2310.88:046:53
2410.88:056:53
2510.88:056:53
2610.88:066:53
2710.88:066:52
2810.88:066:52
2910.88:076:52
3010.78:076:52
3110.78:086:52

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.81 kWh/m².

For context, solar energy here swings from a low near 3.43 kWh/m² to a high of 6.17 kWh/m² in November across the year — May's 3.81 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.2Bright
54.2Bright
64.2Bright
74.1Bright
84.1Bright
94.0Bright
104.0Bright
114.0Moderate
123.9Moderate
133.9Moderate
143.9Moderate
153.8Moderate
163.8Moderate
173.8Moderate
183.7Moderate
193.7Moderate
203.7Moderate
213.6Moderate
223.6Moderate
233.6Moderate
243.6Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.5Moderate
293.5Moderate
303.5Moderate
313.5Moderate
Planning a trip in May

Hazard calendar for Rosana

In seasonPeak

In May, Rosana sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Rosana's rainy season runs May–May, 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 Rosana?

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

7.3
Sightseeing
4th-best month of the year
6.9
Beach & pool
6th-best month of the year

May is one of the better times to visit Rosana for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Rosana in May

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

In May, Rosana sees daytime highs around 26°C and nights near 18°C. Worth packing: light clothes. About 8 days see rain.

light clothes

UV index in Rosana 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 Rosana peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 14 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateExtremeJan 19UV 15Sep 14UV 4
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar13Extreme
Apr10Very high
May7Very high
Jun6High
Jul6High
Aug8Very high
Sep3Moderate
Oct11Extreme
Nov12Extreme
Dec13Extreme

Air quality in Rosana 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 Rosana is worst in September — around 35 µg/m³ PM2.5 (moderate), about 6.4× the cleanest month (March, 5 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1632 µg/m³Mar 205 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb7Good
Mar5Good
Apr6Good
May7Good
Jun7Good
Jul7Good
Aug11Good
Sep35Moderate
Oct13Moderate
Nov9Good
Dec6Good
Location & terrain

Where is Rosana?

Rosana sits at 22.6°S, 53.1°W, 285 m above sea level, in Brazil. The nearest listed city is Taquarussu, 32 km away.

Topography around Rosana

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

Within 3 km, the terrain around Rosana has only modest variations in elevation — a maximum elevation change of 73 m around an average of 251 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 178 m; within 80 km, significant variations in elevation — a maximum elevation change of 394 m.

The land around Rosana is covered by grassland (52%), trees (21%) and water (21%) within 3 km, grassland (51%) within 16 km, and grassland (42%) and cropland (35%) within 80 km.

3 km
73 m
16 km
178 m
80 km
394 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Taquarussu 32 km · Loanda 39 km · Nova Andradina 48 km · Paranavaí 82 km · Teodoro Sampaio 92 km · Nova Esperança 110 km · Colorado 115 km · Bataguassu 116 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 Rosana (-22.5797°, -53.0592°, elevation 285 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).