Altos weather in May

In May, Altos sees average daytime highs of 32°C and overnight lows near 23°C, with 129 mm of rain across 12.7 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 25% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 11 h 48 min at the start of May to 11 h 42 min by month's end. Set against the rest of the year, May is Altos's 7th-clearest and 8th-windiest month. For the whole year in context, see Altos's year-round climate.

Daytime high
32°
9th warmest
Overnight low
23°
4th coldest
Rainfall
129 mm
12.7 wet days
Daylight
11 h 48 min
5:53 AM – 5:39 PM
Cloud cover
62%
7th clearest
Wind
6 km/h
8th windiest
Solar energy
4.96 kWh/m²
Travel score
3.8
out of 10

Altos 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

Day-to-day highs hold fairly steady near 32°C through the month.

A typical May day in Altos reaches about 32°C in the afternoon and slips back to 23°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°C. Set against its neighbours, May runs on par with April and about 1°C cooler than June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13123
23123
33123
43123
53223
63223
73223
83223
93223
103223
113223
123223
133223
143223
153223
163223
173223
183223
193223
203223
213223
223223
233223
243223
253223
263223
273223
283223
293223
303223
313223

How May really feels in Altos

Once humidity and wind are folded in, May averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Altos weather by month

How May compares with the rest of the year at a glance. May is the 9th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°25722.412.32.7
Feb32° / 23°29922.512.22.7
Mar31° / 23°37127122.6
Apr31° / 23°29723.611.92.9
May32° / 23°12912.711.83.8
Jun33° / 23°183.511.74.2
Jul34° / 24°91.511.74.0
Aug35° / 24°20.511.83.2
Sep36° / 25°40.8122.3
Oct37° / 25°172.212.11.9
Nov36° / 25°375.512.22.1
Dec35° / 25°9711.212.32.5

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 24% of May, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13268
23268
33367
43466
53664
63664
73862
83961
94060
104357
114456
124555
134753
144753
154951
165050
175149
185347
195347
205446
215446
225644
235743
245743
255842
265941
275941
286040
296238
306238
316337

Chance of precipitation in May

Any precipitation

Altos gets around 129 mm of rain over 12.7 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 41% and peaks near 63% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
163
262
360
458
556
654
752
850
948
1046
1144
1243
1341
1440
1539
1638
1737
1837
1936
2035
2134
2234
2333
2432
2531
2631
2730
2829
2928
3026
3125

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the oppressive band about 69% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1026236
2026335
3026434
4026434
5026533
6026632
7026731
8036730
9036829
10036928
11037027
12047026
13047125
14047224
15057223
16057223
17067222
18077221
19077320
20087319
21097318
220117217
230127216
240137215
250157213
260167212
270187111
280207010
29022699
30024697
31127666

Wind in May

Winds average 6 km/h in May.

Across May, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 48 min at the start of May to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over May. Sunrise moves from 5:52 AM to 5:55 AM, and sunset from 5:42 PM to 5:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.85:525:42
211.85:525:42
311.85:525:41
411.85:525:41
511.85:525:41
611.85:525:41
711.85:525:40
811.85:525:40
911.85:525:40
1011.85:525:40
1111.85:535:40
1211.85:535:40
1311.85:535:40
1411.85:535:39
1511.85:535:39
1611.85:535:39
1711.85:535:39
1811.85:535:39
1911.85:535:39
2011.85:535:39
2111.85:545:39
2211.85:545:39
2311.85:545:39
2411.75:545:39
2511.75:545:39
2611.75:545:39
2711.75:555:39
2811.75:555:39
2911.75:555:39
3011.75:555:39
3111.75:555:39

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.96 kWh/m².

For context, solar energy here swings from a low near 4.84 kWh/m² to a high of 6.72 kWh/m² in October across the year — May's 4.96 kWh/m² sits near the bottom.

0246151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in May

Hazard calendar for Altos

In seasonPeak

None of Altos's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Altos's monsoon runs January–April, when most of the year's rain falls.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Altos?

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

3.8
Sightseeing
3rd-best month of the year
6.0
Beach & pool
4th-best month of the year

May is a weaker month for outdoor sightseeing in Altos. The water and warmth also suit a beach or pool day.

What to pack for Altos in May

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

In May, Altos sees daytime highs around 32°C and nights near 23°C. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in Altos in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Altos peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 10 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 14UV 15Aug 10UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec11Extreme

Air quality in Altos 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 Altos is worst in October — around 35 µg/m³ PM2.5 (moderate), about 4.2× the cleanest month (June, 8 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateOct 1633 µg/m³Jun 199 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb16Moderate
Mar15Moderate
Apr14Moderate
May12Good
Jun8Good
Jul10Good
Aug16Moderate
Sep25Moderate
Oct35Moderate
Nov23Moderate
Dec17Moderate
Location & terrain

Where is Altos?

Altos sits at 5.0°S, 42.5°W, 192 m above sea level, in Brazil. The nearest listed city is José de Freitas, 34 km away.

Topography around Altos

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

Within 3 km, the terrain around Altos has only modest variations in elevation — a maximum elevation change of 103 m around an average of 184 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 175 m; within 80 km, significant variations in elevation — a maximum elevation change of 375 m.

The land around Altos is covered by trees (30%), shrubs (26%) and grassland (23%) within 3 km, trees (58%), shrubs (21%) and grassland (20%) within 16 km, and trees (42%), shrubs (32%) and grassland (23%) within 80 km.

3 km
103 m
16 km
175 m
80 km
375 m
treesshrubsgrasslandcroplandartificial surfaces
May weather nearby: José de Freitas 34 km · Teresina 38 km · Campo Maior 40 km · Timon 42 km · Demerval Lobão 43 km · União 67 km · Barras 90 km · Água Branca 97 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 Altos (-5.0381°, -42.46°, elevation 192 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).