Plácido de Castro weather in May

In May, Plácido de Castro sees average daytime highs of 30°C and overnight lows near 22°C, with 88 mm of rain across 16.5 wet days and about 11.5 hours of daylight. It is the 12th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 15% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 11 h 36 min at the start of May to 11 h 24 min by month's end. Set against the rest of the year, May is Plácido de Castro's 5th-clearest and 10th-windiest month. For the whole year in context, see Plácido de Castro's year-round climate.

Daytime high
30°
12th warmest
Overnight low
22°
4th coldest
Rainfall
88 mm
16.5 wet days
Daylight
11 h 30 min
5:39 AM – 5:11 PM
Cloud cover
69%
5th clearest
Wind
6 km/h
10th windiest
Solar energy
4.24 kWh/m²
Travel score
4.3
out of 10

Plácido de Castro 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 30°C through the month.

A typical May day in Plácido de Castro reaches about 30°C in the afternoon and slips back to 22°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 32°C. Set against its neighbours, May runs on par with April and on par with June.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13022
23022
33022
43022
53022
63022
73022
83022
93022
103022
113022
123022
133022
143022
153022
163022
173022
183022
193022
203021
213021
223021
233021
243021
253021
263021
273021
283021
293021
303021
313021

How May really feels in Plácido de Castro

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.

Plácido de Castro weather by month

How May compares with the rest of the year at a glance. May is the 12th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°25926.712.52.8
Feb30° / 23°25024.512.32.8
Mar30° / 23°26326.912.12.8
Apr30° / 23°17322.711.83.2
May30° / 22°8816.511.54.3
Jun30° / 21°418.111.45.2
Jul31° / 20°244.711.55.1
Aug33° / 21°457.311.73.9
Sep33° / 22°8913.611.93.1
Oct32° / 23°1612112.22.8
Nov31° / 23°22323.712.52.8
Dec31° / 23°26126.512.62.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 20% of May, with mostly cloudy or overcast conditions the remaining 65%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12377
22377
32476
42674
52773
62773
72872
82971
93070
103070
113070
123268
133268
143367
153367
163565
173565
183664
193763
203862
213961
223961
233961
244060
254159
264258
274456
284456
294555
304753
314951

Chance of precipitation in May

Any precipitation

Plácido de Castro gets around 88 mm of rain over 16.5 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 53% and peaks near 65% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
165
264
363
462
561
660
759
859
958
1058
1157
1257
1356
1456
1556
1655
1754
1854
1953
2052
2151
2250
2349
2447
2546
2645
2744
2842
2941
3040
3139

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 60% of days. Sticky, muggy-or-worse air turns up on roughly 93% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
12485729
22485828
32495827
42495926
53495925
634105924
734105924
834106023
934106023
1034115923
1134116022
1234116022
1334125922
1434125922
1534125922
1634135822
1734135921
1834145821
1934145821
2024155920
2124156019
2224166018
2324166117
2424166216
2524176215
2624176314
2724176413
2825176313
2925176412
3025176511
3125176610

Wind in May

Winds average 6 km/h in May.

Across May, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 36 min at the start of May to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over May. Sunrise moves from 5:37 AM to 5:43 AM, and sunset from 5:15 PM to 5:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.65:375:15
211.65:375:15
311.65:375:14
411.65:375:14
511.65:375:14
611.65:375:13
711.65:385:13
811.65:385:13
911.65:385:12
1011.65:385:12
1111.65:385:12
1211.65:385:12
1311.55:395:11
1411.55:395:11
1511.55:395:11
1611.55:395:11
1711.55:395:11
1811.55:405:10
1911.55:405:10
2011.55:405:10
2111.55:405:10
2211.55:415:10
2311.55:415:10
2411.55:415:10
2511.55:415:10
2611.55:415:10
2711.55:425:10
2811.55:425:10
2911.55:425:09
3011.45:435:09
3111.45:435:09

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.24 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.24 kWh/m² to a high of 5.56 kWh/m² in September across the year — May's 4.24 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.2Bright
174.2Bright
184.2Bright
194.2Bright
204.2Bright
214.2Bright
224.2Bright
234.2Bright
244.2Bright
254.2Bright
264.1Bright
274.1Bright
284.1Bright
294.1Bright
304.1Bright
314.2Bright
Planning a trip in May

Hazard calendar for Plácido de Castro

In seasonPeak

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

Plácido de Castro's rainy season runs October–April, when most of the year's rain falls.

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

Is May a good time to visit Plácido de Castro?

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

4.3
Sightseeing
3rd-best month of the year
5.8
Beach & pool
4th-best month of the year

May is a reasonable time to visit Plácido de Castro for sightseeing.

What to pack for Plácido de Castro in May

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

In May, Plácido de Castro sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. About 17 days see rain.

light clothesrain gear

UV index in Plácido de Castro in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Plácido de Castro peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 12 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateExtremeJan 21UV 15Sep 12UV 4
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May10Extreme
Jun9Very high
Jul8Very high
Aug7High
Sep4Moderate
Oct12Extreme
Nov13Extreme
Dec14Extreme

Air quality in Plácido de Castro 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 Plácido de Castro is worst in September — around 60 µg/m³ PM2.5 (unhealthy), about 7.8× the cleanest month (June, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModeratePoorModerateGoodSep 1457 µg/m³Jun 98 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb13Moderate
Mar13Moderate
Apr10Good
May8Good
Jun8Good
Jul12Good
Aug37Poor
Sep60Unhealthy
Oct23Moderate
Nov13Moderate
Dec11Good
Location & terrain

Where is Plácido de Castro?

Plácido de Castro sits at 10.3°S, 67.2°W, 136 m above sea level, in Brazil. The nearest listed city is Senador Guiomard, 64 km away.

Topography around Plácido de Castro

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

Within 3 km, the terrain around Plácido de Castro has only modest variations in elevation — a maximum elevation change of 51 m around an average of 135 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 112 m; within 80 km, only modest variations in elevation — a maximum elevation change of 133 m.

The land around Plácido de Castro is covered by trees (71%) and grassland (24%) within 3 km, trees (74%) and grassland (26%) within 16 km, and trees (74%) and grassland (26%) within 80 km.

3 km
51 m
16 km
112 m
80 km
133 m
treesgrasslandartificial surfaces
May weather nearby: Senador Guiomard 64 km · Rio Branco 79 km · Porto Acre 91 km · Riberalta 145 km · Xapuri 148 km · Boca do Acre 178 km · Epitaciolândia 187 km · Brasiléia 187 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 Plácido de Castro (-10.3353°, -67.1856°, elevation 136 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).