Imperatriz weather in May

In May, Imperatriz sees average daytime highs of 32°C and overnight lows near 23°C, with 74 mm of rain across 11.8 wet days and about 11.8 hours of daylight. It is the 7th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 25% 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 42 min by month's end. Set against the rest of the year, May is Imperatriz's 6th-clearest and 6th-windiest month. For the whole year in context, see Imperatriz's year-round climate.

Daytime high
32°
7th warmest
Overnight low
23°
4th coldest
Rainfall
74 mm
11.8 wet days
Daylight
11 h 42 min
6:14 AM – 5:59 PM
Cloud cover
62%
6th clearest
Wind
6 km/h
6th windiest
Solar energy
4.8 kWh/m²
Travel score
4.0
out of 10

Imperatriz 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 32°C through the month.

A typical May day in Imperatriz reaches about 32°C in the afternoon and slips back to 23°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 33°C. Set against its neighbours, May runs about 1°C warmer than April and about 1°C cooler than June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13123
23123
33123
43123
53123
63123
73123
83123
93123
103123
113123
123223
133223
143223
153223
163223
173223
183223
193223
203223
213223
223223
233223
243223
253223
263223
273223
283223
293223
303223
313223

How May really feels in Imperatriz

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.

Imperatriz weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°20726.112.32.9
Feb30° / 23°20523.912.22.9
Mar31° / 23°21226.4122.9
Apr31° / 23°15120.711.93.2
May32° / 23°7411.811.84.0
Jun33° / 22°81.811.74.5
Jul34° / 22°61.111.74.1
Aug35° / 22°20.411.83.6
Sep35° / 23°102123.3
Oct34° / 24°396.312.13.4
Nov32° / 24°10014.212.33.3
Dec31° / 23°14620.212.33.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 21% of May, with mostly cloudy or overcast conditions the remaining 54%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12773
22971
33070
43070
53268
63367
73466
83565
93763
103961
114159
124258
134456
144555
154753
164753
174852
184951
195050
205149
215149
225248
235446
245545
255644
265743
275941
286040
296238
306337
316535

Chance of precipitation in May

Any precipitation

Imperatriz gets around 74 mm of rain over 11.8 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 37% and peaks near 57% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
157
256
355
453
552
650
748
846
944
1042
1140
1239
1337
1436
1535
1634
1733
1832
1932
2031
2131
2230
2330
2429
2529
2628
2727
2825
2924
3022
3121

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 78% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
106931
206931
307030
416930
517029
617029
717128
817227
917326
1017425
1117524
1217623
1317722
1417920
1518019
1618118
1728117
1828216
1928315
2038314
2138413
2248412
2358411
2458510
256859
268839
279838
2810837
2912817
3014806
3116795

Wind in May

Winds average 6 km/h in May.

Across May, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 48 min at the start of May to 11 h 42 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 6:13 AM to 6:16 AM, and sunset from 6:01 PM to 5:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:136:01
211.86:136:01
311.86:136:01
411.86:136:01
511.86:136:00
611.86:136:00
711.86:136:00
811.86:136:00
911.86:136:00
1011.86:135:59
1111.86:135:59
1211.86:135:59
1311.86:135:59
1411.86:145:59
1511.86:145:59
1611.76:145:59
1711.76:145:59
1811.76:145:59
1911.76:145:58
2011.76:145:58
2111.76:145:58
2211.76:155:58
2311.76:155:58
2411.76:155:58
2511.76:155:58
2611.76:155:58
2711.76:155:58
2811.76:165:58
2911.76:165:58
3011.76:165:58
3111.76:165:59

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.8 kWh/m².

For context, solar energy here swings from a low near 4.5 kWh/m² to a high of 6.3 kWh/m² in September across the year — May's 4.8 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.6Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in May

Hazard calendar for Imperatriz

In seasonPeak

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

Imperatriz's monsoon runs November–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 Imperatriz?

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

4.0
Sightseeing
3rd-best month of the year
6.2
Beach & pool
6th-best month of the year

May is a reasonable time to visit Imperatriz for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Imperatriz in May

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

In May, Imperatriz sees daytime highs around 32°C and nights near 23°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

UV index in Imperatriz 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 Imperatriz peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 12UV 15Jul 12UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Very high
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec10Extreme

Air quality in Imperatriz 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 Imperatriz is worst in October — around 29 µg/m³ PM2.5 (moderate), about 4.9× the cleanest month (June, 6 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateOct 2329 µg/m³Jun 206 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb13Moderate
Mar13Moderate
Apr12Moderate
May9Good
Jun6Good
Jul7Good
Aug12Moderate
Sep23Moderate
Oct29Moderate
Nov29Moderate
Dec20Moderate
Location & terrain

Where is Imperatriz?

Imperatriz sits at 5.5°S, 47.5°W, 127 m above sea level, in Brazil. The nearest listed city is João Lisboa, 13 km away.

Topography around Imperatriz

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

Within 3 km, the terrain around Imperatriz has only modest variations in elevation — a maximum elevation change of 43 m around an average of 119 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 153 m; within 80 km, significant variations in elevation — a maximum elevation change of 438 m.

The land around Imperatriz is covered by artificial surfaces (46%), trees (21%) and grassland (20%) within 3 km, grassland (46%) and trees (44%) within 16 km, and grassland (54%) and trees (43%) within 80 km.

3 km
43 m
16 km
153 m
80 km
438 m
treesshrubsgrasslandcroplandartificial surfaceswater
May weather nearby: João Lisboa 13 km · Governador Edison Lobão 28 km · Açailândia 64 km · Araguatins 70 km · Amarante do Maranhão 83 km · Tocantinópolis 90 km · Porto Franco 91 km · Sítio Novo 96 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 Imperatriz (-5.5264°, -47.4917°, elevation 127 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).