São Miguel do Iguaçu weather in May

In May, São Miguel do Iguaçu sees average daytime highs of 24°C and overnight lows near 16°C, with 156 mm of rain across 9.6 wet days and about 10.8 hours of daylight. It is the 10th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 25°C in the first days to 22°C by the end. The sky is clear or mostly clear about 40% of the time in May, and the air most often feels humid.

Daylight stretches from about 11 h 06 min at the start of May to 10 h 36 min by month's end. Set against the rest of the year, May is São Miguel do Iguaçu's 7th-clearest and 7th-windiest month. For the whole year in context, see São Miguel do Iguaçu's year-round climate.

Daytime high
24°
10th warmest
Overnight low
16°
4th coldest
Rainfall
156 mm
9.6 wet days
Daylight
10 h 48 min
8:10 AM – 6:56 PM
Cloud cover
54%
7th clearest
Wind
10 km/h
7th windiest
Solar energy
3.32 kWh/m²
Travel score
7.0
out of 10

São Miguel do Iguaçu 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 25°C in the first days to 22°C by the end.

A typical May day in São Miguel do Iguaçu reaches about 24°C in the afternoon and slips back to 16°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 28°C. Set against its neighbours, May runs about 4°C cooler than April and about 1°C warmer than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12617
22517
32517
42517
52517
62516
72516
82516
92416
102416
112416
122416
132416
142416
152416
162415
172315
182315
192315
202315
212315
222315
232315
242315
252315
262315
272315
282215
292215
302214
312214

How May really feels in São Miguel do Iguaçu

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.

São Miguel do Iguaçu weather by month

How May compares with the rest of the year at a glance. May is the 10th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 22°15316.213.43.9
Feb31° / 22°13814.112.94.2
Mar30° / 21°12512.612.24.9
Apr28° / 19°1279.111.46.4
May24° / 16°1569.610.87.0
Jun22° / 14°130910.57.0
Jul23° / 14°1138.610.67.2
Aug25° / 15°946.911.17.7
Sep27° / 17°1499.811.86.7
Oct28° / 19°18313.212.65.5
Nov29° / 20°14611.713.25.1
Dec30° / 22°16814.913.54.3

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% 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 48%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25545
35545
45545
55446
65446
75545
85446
95446
105347
115347
125347
135248
145248
155248
165248
175248
185050
195050
205050
215050
225050
234951
244951
254852
264951
275050
284951
294951
304951
315050

Chance of precipitation in May

Any precipitation

São Miguel do Iguaçu gets around 156 mm of rain over 9.6 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 30% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
128
228
328
427
527
627
727
828
928
1028
1128
1229
1329
1429
1530
1630
1731
1832
1932
2033
2133
2233
2334
2434
2534
2633
2733
2833
2933
3032
3132

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 33% of days. Sticky, muggy-or-worse air turns up on roughly 17% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1141539293
2151639273
3161738263
4171838252
5181938242
6182037222
7192237211
8192336211
9202436201
10202535191
11212635181
12212635171
13222735160
14222735150
15232735150
16232735140
17242835130
18252834130
19262834120
20272833120
21282832121
22292831111
23302731111
24312730111
25322729111
26332729111
27342728111
28352627111
29352627111
30362627111
31362527111

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
99calm
109calm
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 h 06 min at the start of May to 10 h 36 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 8:02 AM to 8:18 AM, and sunset from 7:06 PM to 6:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.18:027:06
211.08:037:05
311.08:037:04
411.08:047:04
511.08:047:03
611.08:057:02
710.98:057:02
810.98:067:01
910.98:067:00
1010.98:077:00
1110.98:086:59
1210.88:086:58
1310.88:096:58
1410.88:096:57
1510.88:106:57
1610.88:106:56
1710.88:116:56
1810.78:116:55
1910.78:126:55
2010.78:126:54
2110.78:136:54
2210.78:136:54
2310.78:146:53
2410.68:146:53
2510.68:156:52
2610.68:156:52
2710.68:166:52
2810.68:166:52
2910.68:176:51
3010.68:176:51
3110.68:186:51

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.32 kWh/m².

For context, solar energy here swings from a low near 2.89 kWh/m² to a high of 6.4 kWh/m² in December across the year — May's 3.32 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.8Moderate
43.7Moderate
53.7Moderate
63.7Moderate
73.6Moderate
83.6Moderate
93.6Moderate
103.5Moderate
113.5Moderate
123.5Moderate
133.4Moderate
143.4Moderate
153.4Moderate
163.3Moderate
173.3Moderate
183.3Moderate
193.2Moderate
203.2Moderate
213.1Moderate
223.1Moderate
233.1Moderate
243.1Moderate
253.0Moderate
263.0Moderate
273.0Moderate
283.0Moderate
293.0Moderate
303.0Moderate
312.9Moderate
Planning a trip in May

Is May a good time to visit São Miguel do Iguaçu?

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

7.0
Sightseeing
3rd-best month of the year
5.8
Beach & pool
9th-best month of the year

May is one of the better times to visit São Miguel do Iguaçu for general sightseeing.

What to pack for São Miguel do Iguaçu in May

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

In May, São Miguel do Iguaçu sees daytime highs around 24°C and nights near 16°C. Worth packing: light clothes and rain gear. About 10 days see rain.

light clothesrain gear

UV index in São Miguel do Iguaçu 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 São Miguel do Iguaçu peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighHighVery highExtremeJan 19UV 15Jul 12UV 5
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May6High
Jun5High
Jul5Moderate
Aug6High
Sep6High
Oct10Very high
Nov12Extreme
Dec13Extreme

Air quality in São Miguel do Iguaçu 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 São Miguel do Iguaçu is worst in September — around 19 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (March, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1618 µg/m³Mar 156 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar6Good
Apr7Good
May7Good
Jun7Good
Jul7Good
Aug11Good
Sep19Moderate
Oct12Good
Nov8Good
Dec7Good
Location & terrain

Where is São Miguel do Iguaçu?

São Miguel do Iguaçu sits at 25.3°S, 54.2°W, 331 m above sea level, in Brazil. The nearest listed city is Medianeira, 16 km away.

Topography around São Miguel do Iguaçu

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Miguel do Iguaçu.

Within 3 km, the terrain around São Miguel do Iguaçu has only modest variations in elevation — a maximum elevation change of 170 m around an average of 292 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 243 m; within 80 km, large variations in elevation — a maximum elevation change of 679 m.

The land around São Miguel do Iguaçu is covered by cropland (39%) and trees (27%) within 3 km, cropland (66%) and trees (21%) within 16 km, and trees (45%) and cropland (37%) within 80 km.

3 km
170 m
16 km
243 m
80 km
679 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Medianeira 16 km · Santa Terezinha de Itaipu 19 km · Matelândia 28 km · Foz do Iguacu 42 km · Iguazu 44 km · Presidente Franco 44 km · Ciudad del Este 45 km · Santa Helena 55 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 São Miguel do Iguaçu (-25.3481°, -54.2378°, elevation 331 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).