Altônia weather in May

In May, Altônia sees average daytime highs of 24°C and overnight lows near 17°C, with 125 mm of rain across 8.8 wet days and about 10.9 hours of daylight. It is the 10th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 23°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 Altônia's 6th-clearest and 7th-windiest month. For the whole year in context, see Altônia's year-round climate.

Daytime high
24°
10th warmest
Overnight low
17°
4th coldest
Rainfall
125 mm
8.8 wet days
Daylight
10 h 48 min
8:06 AM – 6:57 PM
Cloud cover
53%
6th clearest
Wind
9 km/h
7th windiest
Solar energy
3.5 kWh/m²
Travel score
7.2
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 26°C in the first days to 23°C by the end.

A typical May day in Altônia reaches about 24°C in the afternoon and slips back to 17°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 28°C. Set against its neighbours, May runs about 4°C cooler than April and about 1°C warmer than June.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12619
22619
32619
42618
52618
62518
72518
82518
92518
102518
112518
122518
132517
142417
152417
162417
172417
182417
192417
202417
212417
222417
232417
242417
252316
262316
272316
282316
292316
302316
312316

How May really feels in Altônia

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.

Altônia weather by month

How May compares with the rest of the year at a glance. May is the 10th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°14416.613.33.9
Feb31° / 23°14314.612.84.0
Mar30° / 22°10712.712.24.7
Apr28° / 20°917.711.56.4
May24° / 17°1258.810.97.2
Jun23° / 16°1078.110.67.4
Jul23° / 15°846.910.77.6
Aug25° / 16°826.211.27.8
Sep27° / 18°1158.511.96.9
Oct29° / 20°16012.112.65.4
Nov30° / 21°13711.713.25.0
Dec30° / 23°1541513.44.2

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 49%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15545
25446
35446
45446
55446
65446
75347
85347
95248
105248
115149
125149
135149
145149
155050
165050
175050
185050
195050
204951
214951
224951
235050
245050
255050
265050
275050
285050
295050
305050
315149

Chance of precipitation in May

Any precipitation

Altônia gets around 125 mm of rain over 8.8 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 28% and peaks near 33% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
123
223
323
423
523
623
724
824
925
1025
1125
1225
1326
1426
1527
1627
1728
1829
1929
2030
2131
2231
2332
2432
2533
2633
2733
2833
2933
3033
3133

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 26% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
171434377
281535366
381635355
491736345
591936334
692036323
7102037303
8102137293
9102237282
10102337272
11112438262
12112438252
13122438242
14122538231
15122538231
16132639221
17132638211
18132738211
19142738201
20142837191
21152837191
22162936181
23162935181
24173035171
25183034171
26183034171
27193033171
28203032161
29203032161
30213032161
31223031161

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 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
119calm
129calm
139calm
149calm
159calm
169calm
179calm
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 7:59 AM to 8:14 AM, and sunset from 7:07 PM to 6:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.17:597:07
211.18:007:06
311.18:007:05
411.18:017:04
511.08:017:04
611.08:017:03
711.08:027:02
811.08:027:02
911.08:037:01
1011.08:037:01
1110.98:047:00
1210.98:046:59
1310.98:056:59
1410.98:056:58
1510.98:066:58
1610.88:066:57
1710.88:076:57
1810.88:076:56
1910.88:086:56
2010.88:086:56
2110.88:096:55
2210.88:096:55
2310.78:106:54
2410.78:106:54
2510.78:116:54
2610.78:116:54
2710.78:126:53
2810.78:126:53
2910.78:136:53
3010.78:136:53
3110.68:146:52

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.5 kWh/m².

For context, solar energy here swings from a low near 3.12 kWh/m² to a high of 6.28 kWh/m² in December across the year — May's 3.5 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.0Bright
24.0Bright
34.0Moderate
43.9Moderate
53.9Moderate
63.9Moderate
73.8Moderate
83.8Moderate
93.8Moderate
103.7Moderate
113.7Moderate
123.6Moderate
133.6Moderate
143.6Moderate
153.5Moderate
163.5Moderate
173.5Moderate
183.4Moderate
193.4Moderate
203.4Moderate
213.3Moderate
223.3Moderate
233.3Moderate
243.2Moderate
253.2Moderate
263.2Moderate
273.2Moderate
283.2Moderate
293.1Moderate
303.1Moderate
313.1Moderate
Planning a trip in May

Is May a good time to visit Altônia?

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

7.2
Sightseeing
4th-best month of the year
6.2
Beach & pool
7th-best month of the year

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

What to pack for Altônia in May

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

In May, Altônia sees daytime highs around 24°C and nights near 17°C. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

UV index in Altônia 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 Altônia peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 14 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeJan 19UV 15Sep 14UV 5
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May6High
Jun5High
Jul5High
Aug7Very high
Sep4Moderate
Oct11Extreme
Nov12Extreme
Dec14Extreme

Air quality in Altônia 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 Altônia is worst in September — around 26 µg/m³ PM2.5 (moderate), about 4.7× the cleanest month (March, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1525 µg/m³Mar 166 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb7Good
Mar6Good
Apr7Good
May8Good
Jun8Good
Jul7Good
Aug17Moderate
Sep26Moderate
Oct13Moderate
Nov9Good
Dec7Good
Location & terrain

Where is Altônia?

Altônia sits at 23.9°S, 53.9°W, 353 m above sea level, in Brazil. The nearest listed city is Iporã, 25 km away.

Topography around Altônia

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

Within 3 km, the terrain around Altônia has only modest variations in elevation — a maximum elevation change of 114 m around an average of 353 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 216 m; within 80 km, significant variations in elevation — a maximum elevation change of 297 m.

The land around Altônia is covered by grassland (36%) and cropland (36%) within 3 km, cropland (40%) and grassland (38%) within 16 km, and cropland (58%) and grassland (22%) within 80 km.

3 km
114 m
16 km
216 m
80 km
297 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Iporã 25 km · Terra Roxa 37 km · Guaíra 42 km · Palotina 46 km · Itaquiraí 53 km · Umuarama 60 km · Assis Chateaubriand 72 km · Marechal Cândido Rondon 77 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 Altônia (-23.8744°, -53.9017°, elevation 353 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).