Santa Terezinha de Itaipu weather in May

In May, Santa Terezinha de Itaipu sees average daytime highs of 24°C and overnight lows near 15°C, with 162 mm of rain across 9.2 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 39% 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 30 min by month's end. Set against the rest of the year, May is Santa Terezinha de Itaipu's 8th-clearest and 7th-windiest month. For the whole year in context, see Santa Terezinha de Itaipu's year-round climate.

Daytime high
24°
10th warmest
Overnight low
15°
4th coldest
Rainfall
162 mm
9.2 wet days
Daylight
10 h 48 min
8:11 AM – 6:57 PM
Cloud cover
55%
8th clearest
Wind
9 km/h
7th windiest
Solar energy
3.26 kWh/m²
Travel score
7.1
out of 10

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 Santa Terezinha de Itaipu reaches about 24°C in the afternoon and slips back to 15°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 29°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
22617
32516
42516
52516
62516
72516
82516
92516
102416
112415
122415
132415
142415
152415
162415
172315
182315
192315
202315
212315
222315
232314
242314
252314
262314
272314
282214
292214
302214
312214

How May really feels in Santa Terezinha de Itaipu

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.

Santa Terezinha de Itaipu 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°15715.413.43.9
Feb31° / 22°15213.912.94.1
Mar30° / 21°14112.512.24.8
Apr28° / 18°1389.211.46.3
May24° / 15°1629.210.87.1
Jun22° / 14°1379.210.46.9
Jul22° / 13°1178.510.67.2
Aug25° / 14°946.911.17.6
Sep27° / 16°1549.911.86.7
Oct28° / 19°19813.212.65.4
Nov30° / 20°15811.513.25.0
Dec31° / 21°18414.913.64.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% 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 48%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15545
25545
35644
45545
55545
65644
75545
85545
95446
105446
115446
125446
135347
145248
155248
165248
175149
185149
195050
205050
215050
224951
234951
244951
254951
264852
274852
284852
294852
304852
314852

Chance of precipitation in May

Any precipitation

Santa Terezinha de Itaipu gets around 162 mm of rain over 9.2 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 29% and peaks near 32% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
128
227
327
427
527
627
727
827
927
1027
1127
1227
1327
1428
1528
1628
1729
1829
1930
2030
2131
2231
2332
2432
2532
2632
2732
2832
2932
3032
3131

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 21% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1141434335
2151434315
3161534304
4171634294
5171734283
6181833283
7182033272
8192133262
9192233252
10202333231
11202333221
12202433211
13212533201
14212534191
15212534181
16222534171
17222634161
18232634161
19242634151
20252634141
21262633142
22272633132
23282532132
24292532121
25302531121
26312531121
27322430121
28332430121
29342429121
30342429121
31352329121

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 06 min 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 36 minutes over May. Sunrise moves from 8:03 AM to 8:19 AM, and sunset from 7:07 PM to 6:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.18:037:07
211.08:047:06
311.08:047:05
411.08:057:04
511.08:057:04
611.08:067:03
710.98:067:02
810.98:077:01
910.98:077:01
1010.98:087:00
1110.98:087:00
1210.88:096:59
1310.88:096:58
1410.88:106:58
1510.88:106:57
1610.88:116:57
1710.78:116:56
1810.78:126:56
1910.78:136:55
2010.78:136:55
2110.78:146:54
2210.78:146:54
2310.68:156:54
2410.68:156:53
2510.68:166:53
2610.68:166:53
2710.68:176:52
2810.68:176:52
2910.68:186:52
3010.68:186:52
3110.58:196:51

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.26 kWh/m².

For context, solar energy here swings from a low near 2.83 kWh/m² to a high of 6.38 kWh/m² in December across the year — May's 3.26 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.8Moderate
23.7Moderate
33.7Moderate
43.7Moderate
53.6Moderate
63.6Moderate
73.6Moderate
83.5Moderate
93.5Moderate
103.5Moderate
113.4Moderate
123.4Moderate
133.4Moderate
143.3Moderate
153.3Moderate
163.3Moderate
173.2Moderate
183.2Moderate
193.2Moderate
203.1Moderate
213.1Moderate
223.1Moderate
233.0Moderate
243.0Moderate
253.0Moderate
263.0Moderate
272.9Moderate
282.9Moderate
292.9Moderate
302.9Moderate
312.9Moderate
Planning a trip in May

Is May a good time to visit Santa Terezinha de Itaipu?

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

7.1
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 Santa Terezinha de Itaipu for general sightseeing.

What to pack for Santa Terezinha de Itaipu in May

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

In May, Santa Terezinha de Itaipu sees daytime highs around 24°C and nights near 15°C. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

UV index in Santa Terezinha de Itaipu 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 Santa Terezinha de Itaipu 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
Mar11Extreme
Apr9Very high
May6High
Jun5High
Jul5Moderate
Aug6High
Sep6High
Oct10Very high
Nov12Extreme
Dec13Extreme

Air quality in Santa Terezinha de Itaipu 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 Santa Terezinha de Itaipu is worst in September — around 23 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (March, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1622 µg/m³Mar 108 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar8Good
Apr9Good
May10Good
Jun10Good
Jul11Good
Aug14Moderate
Sep23Moderate
Oct14Moderate
Nov10Good
Dec8Good
Location & terrain

Where is Santa Terezinha de Itaipu?

Santa Terezinha de Itaipu sits at 25.4°S, 54.4°W, 273 m above sea level, in Brazil. The nearest listed city is São Miguel do Iguaçu, 19 km away.

Topography around Santa Terezinha de Itaipu

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santa Terezinha de Itaipu.

Within 3 km, the terrain around Santa Terezinha de Itaipu has only modest variations in elevation — a maximum elevation change of 101 m around an average of 270 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 156 m; within 80 km, large variations in elevation — a maximum elevation change of 632 m.

The land around Santa Terezinha de Itaipu is covered by cropland (51%) within 3 km, cropland (55%) and trees (26%) within 16 km, and trees (46%) and cropland (37%) within 80 km.

3 km
101 m
16 km
156 m
80 km
632 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: São Miguel do Iguaçu 19 km · Foz do Iguacu 22 km · Iguazu 25 km · Presidente Franco 25 km · Ciudad del Este 26 km · Medianeira 35 km · Matelândia 48 km · Colonia Wanda 61 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 Santa Terezinha de Itaipu (-25.44°, -54.4016°, elevation 273 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).