Alto Alegre do Maranhão weather in May

In May, Alto Alegre do Maranhão sees average daytime highs of 31°C and overnight lows near 23°C, with 132 mm of rain across 18.2 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 18% of the time in May, and the air most often feels miserable.

Daylight stretches from about 11 h 54 min at the start of May to 11 h 48 min by month's end. Set against the rest of the year, May is Alto Alegre do Maranhão's 7th-clearest and 8th-windiest month. For the whole year in context, see Alto Alegre do Maranhão's year-round climate.

Daytime high
31°
9th warmest
Overnight low
23°
7th coldest
Rainfall
132 mm
18.2 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
4.64 kWh/m²
Travel score
3.5
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 Alto Alegre do Maranhão 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 Alto Alegre do Maranhão

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.

Alto Alegre do Maranhão 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° / 24°25125.112.22.6
Feb31° / 23°26324.812.12.6
Mar31° / 23°32829122.5
Apr31° / 23°27726.611.92.7
May31° / 23°13218.211.83.5
Jun32° / 23°346.611.84.5
Jul33° / 23°142.711.84.4
Aug34° / 23°5111.93.7
Sep35° / 24°71.3123.0
Oct36° / 25°14312.12.7
Nov35° / 25°457.112.22.7
Dec34° / 24°12614.612.22.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 25% of May, with mostly cloudy or overcast conditions the remaining 58%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12476
22476
32575
42674
52773
62971
73070
83268
93367
103466
113664
123763
133961
144060
154258
164456
174555
184654
194852
204852
215050
225149
235248
245446
255446
265545
275644
285743
295842
305941
316040

Chance of precipitation in May

Any precipitation

Alto Alegre do Maranhão gets around 132 mm of rain over 18.2 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 75% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
175
274
373
471
569
668
766
864
963
1062
1160
1260
1359
1458
1558
1658
1757
1857
1956
2056
2155
2255
2354
2453
2552
2651
2749
2847
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 63% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
102476
202476
302575
402575
502575
602674
702773
802773
902872
1002971
1103070
1203169
1303268
1403367
1503466
1603565
1703664
1803862
1903961
2004060
2104159
2204258
2304456
2404555
2504654
2604852
2704951
2815049
2915247
3015445
3115643

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
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 54 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 shrink by about 6 minutes over May. Sunrise moves from 5:59 AM to 6:02 AM, and sunset from 5:51 PM to 5:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:595:51
211.95:595:50
311.85:595:50
411.85:595:50
511.85:595:50
611.85:595:50
711.85:595:49
811.85:595:49
911.85:595:49
1011.85:595:49
1111.85:595:49
1211.85:595:49
1311.86:005:49
1411.86:005:48
1511.86:005:48
1611.86:005:48
1711.86:005:48
1811.86:005:48
1911.86:005:48
2011.86:005:48
2111.86:005:48
2211.86:005:48
2311.86:015:48
2411.86:015:48
2511.86:015:48
2611.86:015:48
2711.86:015:48
2811.86:015:48
2911.86:025:48
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 4.64 kWh/m².

For context, solar energy here swings from a low near 4.37 kWh/m² to a high of 6.33 kWh/m² in October across the year — May's 4.64 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.5Bright
64.5Bright
74.5Bright
84.5Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
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
314.8Bright
Planning a trip in May

Hazard calendar for Alto Alegre do Maranhão

In seasonPeak

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

Alto Alegre do Maranhão'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 Alto Alegre do Maranhão?

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

3.5
Sightseeing
4th-best month of the year
5.3
Beach & pool
7th-best month of the year

May is a weaker month for outdoor sightseeing in Alto Alegre do Maranhão.

What to pack for Alto Alegre do Maranhão in May

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

In May, Alto Alegre do Maranhão 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 Alto Alegre do Maranhão 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 Alto Alegre do Maranhão 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 Alto Alegre do Maranhão 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 Alto Alegre do Maranhão 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 Alto Alegre do Maranhão?

Alto Alegre do Maranhão sits at 4.2°S, 44.4°W, 58 m above sea level, in Brazil. The nearest listed city is São Mateus do Maranhão, 19 km away.

Topography around Alto Alegre do Maranhão

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Alto Alegre do Maranhão.

Within 3 km, the terrain around Alto Alegre do Maranhão has only modest variations in elevation — a maximum elevation change of 31 m around an average of 52 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 100 m; within 80 km, only modest variations in elevation — a maximum elevation change of 227 m.

The land around Alto Alegre do Maranhão is covered by trees (32%), grassland (32%) and shrubs (24%) within 3 km, grassland (43%) and trees (42%) within 16 km, and trees (48%) and grassland (46%) within 80 km.

3 km
31 m
16 km
100 m
80 km
227 m
treesshrubsgrasslandartificial surfaceswaterwetland
May weather nearby: São Mateus do Maranhão 19 km · Peritoró 23 km · São Luís Gonzaga do Maranhão 31 km · Coroatá 37 km · Bacabal 37 km · Pedreiras 43 km · Trizidela do Vale 44 km · Timbiras 56 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 Alto Alegre do Maranhão (-4.2128°, -44.4464°, elevation 58 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).