Rio Negrinho weather in May

In May, Rio Negrinho sees average daytime highs of 20°C and overnight lows near 11°C, with 102 mm of rain across 9.7 wet days and about 10.7 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 19°C by the end. The sky is clear or mostly clear about 25% of the time in May, and the air most often feels dry.

Daylight stretches from about 11 hours at the start of May to 10 h 30 min by month's end. Set against the rest of the year, May is Rio Negrinho's 4th-clearest and 9th-windiest month. For the whole year in context, see Rio Negrinho's year-round climate.

Daytime high
20°
10th warmest
Overnight low
11°
4th coldest
Rainfall
102 mm
9.7 wet days
Daylight
10 h 42 min
7:53 AM – 6:36 PM
Cloud cover
65%
4th clearest
Wind
10 km/h
9th windiest
Solar energy
3.02 kWh/m²
Travel score
6.2
out of 10

Rio Negrinho 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 19°C by the end.

A typical May day in Rio Negrinho reaches about 20°C in the afternoon and slips back to 11°C overnight — a 8°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 3°C cooler than April and about 1°C warmer than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12113
22113
32112
42112
52112
62112
72112
82012
92012
102012
112012
122012
132012
142012
152011
162011
172011
181911
191911
201911
211911
221911
231911
241911
251911
261911
271910
281910
291910
301910
311910

Rio Negrinho weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 17°21122.613.54.7
Feb26° / 17°19020.712.94.6
Mar25° / 17°13218.412.25.4
Apr23° / 14°8511.411.46.4
May20° / 11°1029.710.76.2
Jun19° / 10°1259.810.46.0
Jul19° / 1039.110.56.2
Aug20° / 10°1018.311.16.6
Sep21° / 12°17611.611.86.0
Oct22° / 13°1691612.65.4
Nov23° / 15°13816.513.35.6
Dec25° / 16°17319.313.65.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 11% of May, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
24060
34060
44060
53961
63961
73862
83664
93664
103664
113565
123565
133565
143367
153367
163367
173367
183367
193466
203466
213466
223664
233664
243862
253862
263862
273961
283961
294159
304159
314159

Chance of precipitation in May

Any precipitation

Rio Negrinho gets around 102 mm of rain over 9.7 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 32% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
131
231
330
430
530
630
730
830
930
1030
1130
1230
1331
1431
1532
1632
1732
1832
1933
2033
2133
2233
2333
2433
2533
2633
2733
2833
2933
3033
3133

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 51% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13542221
23742201
33842191
44042181
54142161
64342151
74442141
84542130
94642120
104842110
114842100
12494290
13504280
14514180
15514180
16524170
17524170
18534070
19534070
20543970
21553870
22563770
23573670
24583570
25593470
26613360
27613360
28623260
29633160
30643060
31643060

Wind in May

Winds average 10 km/h in May.

Across May, daily wind ranges from about 9 km/h on the calmest days to 10 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
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 hours at the start of May to 10 h 30 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 7:45 AM to 8:01 AM, and sunset from 6:46 PM to 6:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.07:456:46
211.07:456:45
311.07:466:44
411.07:466:44
510.97:476:43
610.97:476:42
710.97:486:41
810.97:486:41
910.97:496:40
1010.87:496:39
1110.87:506:39
1210.87:516:38
1310.87:516:38
1410.87:526:37
1510.77:526:36
1610.77:536:36
1710.77:536:35
1810.77:546:35
1910.77:546:34
2010.67:556:34
2110.67:566:33
2210.67:566:33
2310.67:576:33
2410.67:576:32
2510.67:586:32
2610.67:586:32
2710.57:596:31
2810.57:596:31
2910.58:006:31
3010.58:006:30
3110.58:016:30

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.02 kWh/m².

For context, solar energy here swings from a low near 2.72 kWh/m² to a high of 5.47 kWh/m² in December across the year — May's 3.02 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.4Moderate
23.4Moderate
33.4Moderate
43.4Moderate
53.3Moderate
63.3Moderate
73.3Moderate
83.2Moderate
93.2Moderate
103.2Moderate
113.1Moderate
123.1Moderate
133.1Moderate
143.0Moderate
153.0Moderate
163.0Moderate
173.0Moderate
182.9Moderate
192.9Moderate
202.9Moderate
212.9Moderate
222.9Moderate
232.8Moderate
242.8Moderate
252.8Moderate
262.8Moderate
272.8Moderate
282.8Moderate
292.8Moderate
302.8Moderate
312.8Moderate
Planning a trip in May

Is May a good time to visit Rio Negrinho?

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

6.2
Sightseeing
3rd-best month of the year
3.1
Beach & pool
10th-best month of the year

May is a reasonable time to visit Rio Negrinho for sightseeing.

What to pack for Rio Negrinho in May

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

In May, Rio Negrinho sees daytime highs around 20°C and nights near 11°C. Worth packing: rain gear. About 10 days see rain.

rain gear

UV index in Rio Negrinho in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 6 — 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 Negrinho peaks around January 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 18UV 15Jul 13UV 5
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May6High
Jun5High
Jul5Moderate
Aug6High
Sep9Very high
Oct11Extreme
Nov12Extreme
Dec14Extreme

Air quality in Rio Negrinho 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 Negrinho is worst in September — around 16 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (February, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1115 µg/m³Feb 139 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar9Good
Apr11Good
May12Moderate
Jun12Good
Jul14Moderate
Aug15Moderate
Sep16Moderate
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Rio Negrinho?

Rio Negrinho sits at 26.3°S, 49.5°W, 793 m above sea level, in Brazil. The nearest listed city is São Bento do Sul, 14 km away.

Topography around Rio Negrinho

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

Within 3 km, the terrain around Rio Negrinho has only modest variations in elevation — a maximum elevation change of 116 m around an average of 820 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 310 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,647 m.

The land around Rio Negrinho is covered by trees (57%) and artificial surfaces (22%) within 3 km, trees (71%) within 16 km, and trees (74%) within 80 km.

3 km
116 m
16 km
310 m
80 km
1,647 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: São Bento do Sul 14 km · Rio Negro 32 km · Mafra 33 km · Corupá 33 km · Itaiópolis 40 km · Quitandinha 43 km · Schroeder 48 km · Tijucas do Sul 50 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 Negrinho (-26.2544°, -49.5183°, elevation 793 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).