Tonantins weather in May

In May, Tonantins sees average daytime highs of 29°C and overnight lows near 23°C, with 317 mm of rain across 29.1 wet days and about 11.9 hours of daylight. It is the 11th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°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 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 Tonantins's 9th-clearest and 3rd-windiest month. For the whole year in context, see Tonantins's year-round climate.

Daytime high
29°
11th warmest
Overnight low
23°
5th coldest
Rainfall
317 mm
29.1 wet days
Daylight
11 h 54 min
6:31 AM – 6:24 PM
Cloud cover
86%
9th clearest
Wind
4 km/h
3rd windiest
Solar energy
3.67 kWh/m²
Travel score
2.8
out of 10

Tonantins 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 29°C through the month.

A typical May day in Tonantins reaches about 29°C in the afternoon and slips back to 23°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 31°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
102923
112923
122923
132923
142923
152923
162923
172923
182923
192923
202923
212923
222923
232923
242923
252923
262923
272923
282923
292923
302923
312923

How May really feels in Tonantins

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.

Tonantins weather by month

How May compares with the rest of the year at a glance. May is the 11th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°27627.612.12.8
Feb30° / 23°26925.312.12.7
Mar30° / 23°32128.5122.6
Apr30° / 23°32828.311.92.7
May29° / 23°31729.111.92.8
Jun29° / 23°21526.311.83.2
Jul30° / 22°16825.411.93.4
Aug31° / 23°13622.911.93.3
Sep31° / 23°14823.4122.9
Oct31° / 23°18525.412.12.7
Nov31° / 23°2102612.12.6
Dec31° / 23°25828.912.22.6

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 6% of May, with mostly cloudy or overcast conditions the remaining 92%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1397
2496
3496
4496
5496
6496
7496
8595
9595
10595
11694
12694
13793
14793
15892
16892
17892
18991
19991
20991
211090
221090
231090
24991
25991
261090
271090
281189
291189
301288
311288

Chance of precipitation in May

Any precipitation

Tonantins gets around 317 mm of rain over 29.1 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 94% and peaks near 95% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
195
295
395
495
594
694
794
894
994
1094
1195
1295
1395
1495
1595
1695
1794
1894
1994
2094
2194
2294
2393
2493
2593
2693
2792
2892
2992
3091
3191

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 58% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
113465
213465
313465
413564
513564
613564
713663
813663
913663
1013762
1113762
1213861
1313861
1403961
1503961
1604060
1704060
1804159
1914257
2014257
2114356
2214455
2314554
2414653
2514752
2614851
2715050
2815148
2915247
3015346
3115544

Wind in May

Winds average 4 km/h in May.

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 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 6:31 AM to 6:33 AM, and sunset from 6:25 PM to 6:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:316:25
211.96:316:25
311.96:316:25
411.96:316:25
511.96:316:25
611.96:316:25
711.96:316:24
811.96:316:24
911.96:316:24
1011.96:316:24
1111.96:316:24
1211.96:316:24
1311.96:316:24
1411.96:316:24
1511.96:316:24
1611.96:316:24
1711.96:316:24
1811.96:316:23
1911.96:326:23
2011.96:326:23
2111.96:326:23
2211.96:326:23
2311.96:326:23
2411.96:326:24
2511.96:326:24
2611.96:326:24
2711.96:336:24
2811.96:336:24
2911.86:336:24
3011.86:336:24
3111.86:336:24

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.67 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.67 kWh/m² to a high of 5.18 kWh/m² in October across the year — May's 3.67 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.8Moderate
43.8Moderate
53.8Moderate
63.8Moderate
73.8Moderate
83.7Moderate
93.7Moderate
103.7Moderate
113.7Moderate
123.7Moderate
133.7Moderate
143.7Moderate
153.7Moderate
163.7Moderate
173.7Moderate
183.7Moderate
193.7Moderate
203.6Moderate
213.6Moderate
223.6Moderate
233.6Moderate
243.6Moderate
253.6Moderate
263.6Moderate
273.6Moderate
283.6Moderate
293.6Moderate
303.6Moderate
313.6Moderate
Planning a trip in May

Is May a good time to visit Tonantins?

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

2.8
Sightseeing
5th-best month of the year
3.8
Beach & pool
9th-best month of the year

May is a weaker month for outdoor sightseeing in Tonantins.

What to pack for Tonantins in May

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

In May, Tonantins sees daytime highs around 29°C and nights near 23°C. Pack light clothes and rain gear. About 29 days see rain.

light clothesrain gear

UV index in Tonantins in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tonantins peaks around February 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 16 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 highExtremeFeb 22UV 15Aug 16UV 10
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May13Extreme
Jun11Extreme
Jul10Very high
Aug10Very high
Sep10Very high
Oct12Extreme
Nov13Extreme
Dec12Extreme

Air quality in Tonantins 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 Tonantins is worst in August — around 18 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (June, 10 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateAug 2217 µg/m³Jun 1110 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb15Moderate
Mar16Moderate
Apr14Moderate
May10Good
Jun10Good
Jul11Good
Aug18Moderate
Sep17Moderate
Oct13Moderate
Nov13Moderate
Dec13Moderate
Location & terrain

Where is Tonantins?

Tonantins sits at 2.9°S, 67.8°W, 55 m above sea level, in Brazil. The nearest listed city is Santo Antônio do Içá, 30 km away.

CarauariMaraãLeticiaTabatingaBenjamin Constant

Topography around Tonantins

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

Within 3 km, the terrain around Tonantins has only modest variations in elevation — a maximum elevation change of 69 m around an average of 67 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 80 m; within 80 km, only modest variations in elevation — a maximum elevation change of 92 m.

The land around Tonantins is covered by trees (73%) within 3 km, trees (86%) within 16 km, and trees (95%) within 80 km.

3 km
69 m
16 km
80 m
80 km
92 m
treesgrasslandartificial surfaceswater
May weather nearby: Santo Antônio do Içá 30 km · São Paulo de Olivença 131 km · Fonte Boa 194 km · Carauari 245 km · Maraã 272 km · Leticia 280 km · Tabatinga 281 km · Benjamin Constant 299 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 Tonantins (-2.8731°, -67.8022°, elevation 55 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).