Peritoró weather in May

In May, Peritoró sees average daytime highs of 31°C and overnight lows near 23°C, with 133 mm of rain across 18 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 31°C through the month. The sky is clear or mostly clear about 19% of the time in May, and the air most often feels miserable.

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

Daytime high
31°
9th warmest
Overnight low
23°
7th coldest
Rainfall
133 mm
18 wet days
Daylight
11 h 48 min
6:00 AM – 5:48 PM
Cloud cover
66%
7th clearest
Wind
5 km/h
8th windiest
Solar energy
4.65 kWh/m²
Travel score
3.6
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical May day in Peritoró reaches about 31°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 33°C. Set against its neighbours, May runs on par with April and on par with June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13123
23123
33123
43123
53123
63123
73123
83123
93123
103123
113123
123123
133123
143123
153123
163123
173123
183123
193123
203123
213123
223123
233123
243123
253123
263123
273123
283123
293123
303123
313123

How May really feels in Peritoró

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.

Peritoró 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
Jan31° / 23°25125.312.22.7
Feb31° / 23°26224.912.12.6
Mar31° / 23°33629.2122.6
Apr31° / 23°28126.611.92.8
May31° / 23°1331811.83.6
Jun32° / 23°30611.84.6
Jul32° / 22°122.311.84.6
Aug34° / 22°40.711.94.0
Sep35° / 23°81.3123.3
Oct35° / 24°17312.13.0
Nov34° / 24°507.812.23.0
Dec33° / 24°12814.912.22.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% 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 57%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12575
22575
32674
42872
52971
62971
73169
83268
93367
103565
113664
123862
134060
144159
154258
164357
174555
184654
194753
204951
214951
225149
235248
245347
255545
265545
275743
285842
295941
306040
316238

Chance of precipitation in May

Any precipitation

Peritoró gets around 133 mm of rain over 18 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 58% and peaks near 77% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
177
276
374
472
571
669
767
865
963
1061
1160
1259
1358
1457
1556
1656
1755
1855
1954
2054
2153
2253
2352
2451
2550
2649
2748
2846
2945
3043
3141

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the miserable band about 54% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
103268
203268
303367
403367
503466
603466
703565
803664
903763
1003862
1103961
1204060
1304159
1404258
1504357
1604456
1704555
1804753
1904852
2014950
2115050
2215049
2315148
2415346
2525345
2625543
2725741
2835740
2935938
3046036
3156134

Wind in May

Winds average 5 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
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

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

Days grow by about 0 minutes over May. Sunrise moves from 5:59 AM to 6:02 AM, and sunset from 5:50 PM to 5:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.85:595:50
211.85:595:50
311.85:595:50
411.85:595:49
511.85:595:49
611.85:595:49
711.85:595:49
811.85:595:49
911.85:595:48
1011.85:595:48
1111.85:595:48
1211.85:595:48
1311.85:595:48
1411.85:595:48
1511.85:595:48
1611.86:005:48
1711.86:005:48
1811.86:005:47
1911.86:005:47
2011.86:005:47
2111.86:005:47
2211.86:005:47
2311.86:005:47
2411.86:015:47
2511.86:015:47
2611.86:015:47
2711.86:015:47
2811.86:015:48
2911.86:015:48
3011.86:025:48
3111.86:025:48

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.65 kWh/m².

For context, solar energy here swings from a low near 4.36 kWh/m² to a high of 6.33 kWh/m² in September across the year — May's 4.65 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.5Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.7Bright
144.7Bright
154.7Bright
164.7Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
314.9Bright
Planning a trip in May

Hazard calendar for Peritoró

In seasonPeak

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

Peritoró'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 Peritoró?

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

3.6
Sightseeing
4th-best month of the year
5.4
Beach & pool
7th-best month of the year

May is a weaker month for outdoor sightseeing in Peritoró.

What to pack for Peritoró in May

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

In May, Peritoró sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

UV index in Peritoró 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 Peritoró 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
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Peritoró 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 Peritoró is worst in October — around 35 µg/m³ PM2.5 (moderate), about 4.0× the cleanest month (June, 9 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateOct 2134 µg/m³Jun 159 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb15Moderate
Mar14Moderate
Apr13Moderate
May10Good
Jun9Good
Jul11Good
Aug13Moderate
Sep19Moderate
Oct35Moderate
Nov30Moderate
Dec23Moderate
Location & terrain

Where is Peritoró?

Peritoró sits at 4.4°S, 44.3°W, 47 m above sea level, in Brazil. The nearest listed city is Alto Alegre do Maranhão, 23 km away.

Topography around Peritoró

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

Within 3 km, the terrain around Peritoró has only modest variations in elevation — a maximum elevation change of 83 m around an average of 57 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 128 m; within 80 km, only modest variations in elevation — a maximum elevation change of 227 m.

The land around Peritoró is covered by grassland (68%) within 3 km, trees (59%) and grassland (35%) within 16 km, and trees (52%) and grassland (42%) within 80 km.

3 km
83 m
16 km
128 m
80 km
227 m
treesshrubsgrasslandartificial surfaces
May weather nearby: Alto Alegre do Maranhão 23 km · Pedreiras 35 km · Coroatá 36 km · São Luís Gonzaga do Maranhão 37 km · Trizidela do Vale 38 km · São Mateus do Maranhão 41 km · Timbiras 46 km · Codó 50 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 Peritoró (-4.3833°, -44.3333°, elevation 47 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).