São Luís Gonzaga do Maranhão weather in May

In May, São Luís Gonzaga do Maranhão sees average daytime highs of 31°C and overnight lows near 23°C, with 118 mm of rain across 17.4 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 6th-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 17% 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 São Luís Gonzaga do Maranhão's 7th-clearest and 8th-windiest month. For the whole year in context, see São Luís Gonzaga do Maranhão's year-round climate.

Daytime high
31°
9th warmest
Overnight low
23°
7th coldest
Rainfall
118 mm
17.4 wet days
Daylight
11 h 48 min
6:01 AM – 5:49 PM
Cloud cover
66%
7th clearest
Wind
5 km/h
8th windiest
Solar energy
4.63 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 São Luís Gonzaga 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 São Luís Gonzaga 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.

São Luís Gonzaga do Maranhão weather by month

How May compares with the rest of the year at a glance. May is the 9th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°23925.612.22.6
Feb31° / 23°25925.112.12.6
Mar31° / 23°30529122.5
Apr31° / 23°24326.411.92.7
May31° / 23°11817.411.83.6
Jun32° / 23°275.811.84.6
Jul33° / 22°122.411.84.5
Aug34° / 23°5111.93.8
Sep35° / 24°81.4123.1
Oct35° / 25°183.712.12.8
Nov35° / 25°558.712.22.8
Dec33° / 24°13016.312.22.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% 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
32674
42674
52872
62971
73070
83169
93367
103565
113664
123862
133961
144060
154258
164456
174456
184654
194753
204753
214852
224951
235050
245248
255347
265446
275446
285644
295743
305842
316040

Chance of precipitation in May

Any precipitation

São Luís Gonzaga do Maranhão gets around 118 mm of rain over 17.4 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 56% and peaks near 76% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
176
274
372
471
569
667
765
863
961
1059
1158
1257
1356
1455
1555
1655
1754
1854
1953
2053
2152
2251
2351
2450
2548
2647
2745
2844
2942
3040
3138

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 64% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
102278
202377
302377
402377
502476
602575
702575
802674
902773
1002872
1102971
1203070
1303169
1403268
1503367
1603466
1703565
1803664
1903763
2003961
2104060
2204159
2304258
2404357
2504456
2604654
2714752
2814950
2915148
3015346
3125444

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
236calm
246calm
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 6:00 AM to 6:03 AM, and sunset from 5:51 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:005:51
211.86:005:51
311.86:005:51
411.86:005:51
511.86:005:50
611.86:005:50
711.86:005:50
811.86:005:50
911.86:005:50
1011.86:005:50
1111.86:015:49
1211.86:015:49
1311.86:015:49
1411.86:015:49
1511.86:015:49
1611.86:015:49
1711.86:015:49
1811.86:015:49
1911.86:015:49
2011.86:015:49
2111.86:015:49
2211.86:025:49
2311.86:025:49
2411.86:025:49
2511.86:025:49
2611.86:025:49
2711.86:025:49
2811.86:035:49
2911.86:035:49
3011.86:035:49
3111.86:035:49

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.63 kWh/m².

For context, solar energy here swings from a low near 4.36 kWh/m² to a high of 6.27 kWh/m² in September across the year — May's 4.63 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.5Bright
64.5Bright
74.5Bright
84.5Bright
94.5Bright
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
234.7Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in May

Hazard calendar for São Luís Gonzaga do Maranhão

In seasonPeak

None of São Luís Gonzaga 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.

São Luís Gonzaga 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 São Luís Gonzaga do Maranhão?

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 São Luís Gonzaga do Maranhão.

What to pack for São Luís Gonzaga do Maranhão in May

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

In May, São Luís Gonzaga do Maranhão sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 17 days see rain.

light clothesrain gearsun protection

UV index in São Luís Gonzaga 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 São Luís Gonzaga do Maranhão peaks around March 14 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 14UV 15Jul 24UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Extreme
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec10Extreme

Air quality in São Luís Gonzaga 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 São Luís Gonzaga do Maranhão is worst in November — around 27 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (June, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 1426 µg/m³Jun 189 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb15Moderate
Mar14Moderate
Apr13Moderate
May11Good
Jun9Good
Jul10Good
Aug10Good
Sep13Moderate
Oct22Moderate
Nov27Moderate
Dec20Moderate
Location & terrain

Where is São Luís Gonzaga do Maranhão?

São Luís Gonzaga do Maranhão sits at 4.4°S, 44.7°W, 38 m above sea level, in Brazil. The nearest listed city is Bacabal, 20 km away.

Topography around São Luís Gonzaga do Maranhão

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

Within 3 km, the terrain around São Luís Gonzaga do Maranhão has only modest variations in elevation — a maximum elevation change of 54 m around an average of 30 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 134 m; within 80 km, significant variations in elevation — a maximum elevation change of 275 m.

The land around São Luís Gonzaga do Maranhão is covered by grassland (64%) and trees (27%) within 3 km, grassland (60%) and trees (37%) within 16 km, and grassland (53%) and trees (42%) within 80 km.

3 km
54 m
16 km
134 m
80 km
275 m
treesshrubsgrasslandartificial surfaceswaterwetland
May weather nearby: Bacabal 20 km · Trizidela do Vale 22 km · Pedreiras 23 km · Alto Alegre do Maranhão 31 km · Peritoró 37 km · São Mateus do Maranhão 43 km · Poção de Pedras 51 km · Lago da Pedra 55 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 São Luís Gonzaga do Maranhão (-4.3788°, -44.6711°, elevation 38 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).