Benjamin Constant weather in May

In May, Benjamin Constant sees average daytime highs of 30°C and overnight lows near 23°C, with 248 mm of rain across 27 wet days and about 11.8 hours of daylight. It is the 10th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 1% 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 Benjamin Constant's 6th-clearest and 1st-windiest month. For the whole year in context, see Benjamin Constant's year-round climate.

Daytime high
30°
10th warmest
Overnight low
23°
5th coldest
Rainfall
248 mm
27 wet days
Daylight
11 h 48 min
5:42 AM – 5:30 PM
Cloud cover
83%
6th clearest
Wind
4 km/h
1st windiest
Solar energy
3.88 kWh/m²
Travel score
3.0
out of 10

Benjamin Constant 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 30°C through the month.

A typical May day in Benjamin Constant reaches about 30°C in the afternoon and slips back to 23°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 32°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)
13023
23023
33023
43023
53023
63023
73023
83023
93023
103023
113023
123023
133023
143023
153023
163023
173023
183023
193023
203023
213023
223023
233023
243023
253023
263023
273023
282923
292923
302923
312923

How May really feels in Benjamin Constant

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.

Benjamin Constant weather by month

How May compares with the rest of the year at a glance. May is the 10th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°30928.812.22.7
Feb30° / 23°2912612.12.7
Mar30° / 23°32629122.6
Apr30° / 23°28527.911.92.7
May30° / 23°2482711.83.0
Jun29° / 22°16424.511.83.4
Jul30° / 22°13122.211.83.8
Aug31° / 22°13021.911.93.5
Sep31° / 23°16523.6123.0
Oct31° / 23°21626.112.12.7
Nov31° / 23°2302712.22.6
Dec30° / 23°28228.912.22.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 9% of May, with mostly cloudy or overcast conditions the remaining 90%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1793
2892
3793
4793
5793
6892
7892
8991
9991
10991
11991
12991
13991
14991
15991
16991
17991
18991
19991
201090
211189
221189
231189
241189
251189
261288
271288
281387
291387
301585
311684

Chance of precipitation in May

Any precipitation

Benjamin Constant gets around 248 mm of rain over 27 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 88% and peaks near 90% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
190
289
389
489
589
688
788
888
988
1088
1188
1288
1388
1488
1588
1688
1788
1888
1988
2088
2187
2287
2387
2487
2587
2687
2786
2886
2986
3085
3185

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 49% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
124355
224355
334453
434453
534453
634453
744551
844551
944551
1044551
1144551
1244551
1344551
1444551
1544551
1644551
1734651
1834651
1934750
2034849
2124949
2225048
2325147
2425246
2525345
2625444
2725642
2835641
2935740
3035839
3136037

Wind in May

Winds average 4 km/h in May, the windiest month of the year.

Across May, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

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 5:42 AM to 5:44 AM, and sunset from 5:33 PM to 5:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.85:425:33
211.85:425:33
311.85:425:32
411.85:425:32
511.85:425:32
611.85:425:32
711.85:425:32
811.85:425:31
911.85:425:31
1011.85:425:31
1111.85:425:31
1211.85:425:31
1311.85:425:31
1411.85:425:31
1511.85:425:31
1611.85:425:30
1711.85:425:30
1811.85:435:30
1911.85:435:30
2011.85:435:30
2111.85:435:30
2211.85:435:30
2311.85:435:30
2411.85:435:30
2511.85:435:30
2611.85:445:30
2711.85:445:30
2811.85:445:30
2911.85:445:30
3011.85:445:30
3111.85:445:31

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.88 kWh/m².

For context, solar energy here swings from a low near 3.84 kWh/m² to a high of 5.11 kWh/m² in September across the year — May's 3.88 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
14.0Moderate
24.0Moderate
34.0Moderate
44.0Moderate
54.0Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.9Moderate
103.9Moderate
113.9Moderate
123.9Moderate
133.9Moderate
143.9Moderate
153.9Moderate
163.9Moderate
173.9Moderate
183.9Moderate
193.9Moderate
203.9Moderate
213.9Moderate
223.8Moderate
233.8Moderate
243.8Moderate
253.8Moderate
263.8Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.8Moderate
313.8Moderate
Planning a trip in May

Is May a good time to visit Benjamin Constant?

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

3.0
Sightseeing
4th-best month of the year
4.1
Beach & pool
5th-best month of the year

May is a weaker month for outdoor sightseeing in Benjamin Constant.

What to pack for Benjamin Constant in May

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

In May, Benjamin Constant sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. About 27 days see rain.

light clothesrain gear

UV index in Benjamin Constant in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Benjamin Constant peaks around February 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 16 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 18UV 15Aug 16UV 9
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar15Extreme
Apr13Extreme
May12Extreme
Jun10Extreme
Jul10Very high
Aug9Very high
Sep10Very high
Oct12Extreme
Nov13Extreme
Dec12Extreme

Air quality in Benjamin Constant 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 Benjamin Constant is worst in September — around 19 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (June, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodSep 1118 µg/m³Jun 129 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb14Moderate
Mar13Moderate
Apr12Good
May9Good
Jun9Good
Jul11Good
Aug17Moderate
Sep19Moderate
Oct12Moderate
Nov12Good
Dec11Good
Location & terrain

Where is Benjamin Constant?

Benjamin Constant sits at 4.4°S, 70.0°W, 68 m above sea level, in Brazil. The nearest listed city is Atalaia do Norte, 18 km away.

EirunepéSanto Antônio do IçáTonantinsIpixuna

Topography around Benjamin Constant

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

Within 3 km, the terrain around Benjamin Constant has only modest variations in elevation — a maximum elevation change of 44 m around an average of 75 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 84 m; within 80 km, only modest variations in elevation — a maximum elevation change of 134 m.

The land around Benjamin Constant is covered by trees (61%) and grassland (21%) within 3 km, trees (87%) within 16 km, and trees (96%) within 80 km.

3 km
44 m
16 km
84 m
80 km
134 m
treesgrasslandartificial surfaceswater
May weather nearby: Atalaia do Norte 18 km · Tabatinga 19 km · Leticia 21 km · São Paulo de Olivença 170 km · Eirunepé 255 km · Santo Antônio do Içá 272 km · Tonantins 299 km · Ipixuna 350 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 Benjamin Constant (-4.3755°, -70.0318°, elevation 68 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).