Barão de Grajaú weather in May

In May, Barão de Grajaú sees average daytime highs of 33°C and overnight lows near 24°C, with 41 mm of rain across 6.5 wet days and about 11.7 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 31% 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 36 min by month's end. Set against the rest of the year, May is Barão de Grajaú's 6th-clearest and 6th-windiest month. For the whole year in context, see Barão de Grajaú's year-round climate.

Daytime high
33°
8th warmest
Overnight low
24°
6th coldest
Rainfall
41 mm
6.5 wet days
Daylight
11 h 42 min
5:58 AM – 5:39 PM
Cloud cover
56%
6th clearest
Wind
9 km/h
6th windiest
Solar energy
5.03 kWh/m²
Travel score
3.9
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical May day in Barão de Grajaú reaches about 33°C in the afternoon and slips back to 24°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 35°C. Set against its neighbours, May runs about 1°C warmer than April and on par with June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13223
23223
33223
43223
53223
63224
73224
83224
93324
103324
113324
123324
133324
143324
153324
163324
173324
183324
193324
203324
213324
223324
233324
243324
253324
263324
273324
283324
293324
303324
313324

How May really feels in Barão de Grajaú

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.

Barão de Grajaú weather by month

How May compares with the rest of the year at a glance. May is the 8th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°20022.512.33.0
Feb31° / 23°19321.212.22.9
Mar31° / 23°18823.2123.0
Apr32° / 23°11215.911.93.5
May33° / 24°416.511.73.9
Jun33° / 24°40.811.64.2
Jul34° / 23°30.311.64.2
Aug35° / 24°00.111.83.4
Sep36° / 25°40.5122.5
Oct36° / 26°213.112.22.3
Nov35° / 25°749.212.32.8
Dec33° / 24°11313.712.43.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% 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 46%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24555
34555
44555
54654
64654
74852
84852
94951
105050
115149
125248
135248
145347
155347
165545
175545
185644
195644
205743
215842
225842
235941
246040
256139
266238
276238
286436
296535
306634
316634

Chance of precipitation in May

Any precipitation

Barão de Grajaú gets around 41 mm of rain over 6.5 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 21% and peaks near 35% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
233
332
431
530
628
727
826
924
1023
1122
1221
1320
1420
1519
1619
1719
1819
1919
2018
2118
2218
2317
2417
2516
2615
2715
2814
2913
3012
3110

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 45% of days. Sticky, muggy-or-worse air turns up on roughly 89% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10227683
20228682
31329652
41331632
51332622
61434592
71435591
81537561
91538551
101640521
111641511
121643500
131744480
141745470
151746460
161847450
171848430
181948420
1901049410
2001049400
2101250380
2201350370
2301451350
2411550340
2511750320
2611851300
2712051280
2812251260
2912451240
3012651220
3112851200

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 8 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
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 48 min at the start of May to 11 h 36 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 5:56 AM to 6:00 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)
111.85:565:42
211.85:565:42
311.85:565:42
411.85:565:41
511.75:565:41
611.75:575:41
711.75:575:41
811.75:575:40
911.75:575:40
1011.75:575:40
1111.75:575:40
1211.75:575:40
1311.75:575:40
1411.75:575:39
1511.75:575:39
1611.75:585:39
1711.75:585:39
1811.75:585:39
1911.75:585:39
2011.75:585:39
2111.75:585:39
2211.75:585:39
2311.75:595:39
2411.75:595:39
2511.75:595:39
2611.75:595:39
2711.75:595:39
2811.66:005:39
2911.66:005:39
3011.66:005:39
3111.66:005:39

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.03 kWh/m².

For context, solar energy here swings from a low near 4.85 kWh/m² to a high of 6.76 kWh/m² in September across the year — May's 5.03 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
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
315.1Bright
Planning a trip in May

Hazard calendar for Barão de Grajaú

In seasonPeak

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

Barão de Grajaú's monsoon runs December–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 Barão de Grajaú?

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

3.9
Sightseeing
3rd-best month of the year
6.8
Beach & pool
4th-best month of the year

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

What to pack for Barão de Grajaú in May

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

In May, Barão de Grajaú sees daytime highs around 33°C and nights near 24°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Barão de Grajaú 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 Barão de Grajaú peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 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 12UV 15Jul 24UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec11Extreme

Air quality in Barão de Grajaú 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 Barão de Grajaú is worst in October — around 16 µg/m³ PM2.5 (moderate), about 4.9× the cleanest month (June, 3 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodOct 1815 µg/m³Jun 233 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar10Good
Apr9Good
May6Good
Jun3Good
Jul3Good
Aug6Good
Sep11Good
Oct16Moderate
Nov12Moderate
Dec11Good
Location & terrain

Where is Barão de Grajaú?

Barão de Grajaú sits at 6.8°S, 43.0°W, 119 m above sea level, in Brazil. The nearest listed city is Floriano, 1.0 km away.

Topography around Barão de Grajaú

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

Within 3 km, the terrain around Barão de Grajaú has only modest variations in elevation — a maximum elevation change of 89 m around an average of 131 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 166 m; within 80 km, significant variations in elevation — a maximum elevation change of 390 m.

The land around Barão de Grajaú is covered by artificial surfaces (32%), grassland (28%) and trees (27%) within 3 km, trees (49%) and grassland (32%) within 16 km, and trees (52%) and shrubs (30%) within 80 km.

3 km
89 m
16 km
166 m
80 km
390 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Floriano 1.0 km · Amarante 60 km · Regeneração 69 km · São João dos Patos 80 km · Oeiras 103 km · Água Branca 105 km · Passagem Franca 106 km · Paraibano 112 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 Barão de Grajaú (-6.7564°, -43.0242°, elevation 119 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).