Rio Branco weather in April

In April, Rio Branco sees average daytime highs of 30°C and overnight lows near 22°C, with 160 mm of rain across 22.8 wet days and about 11.8 hours of daylight. It is the 7th-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 5% of the time in April, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of April to 11 h 42 min by month's end. Set against the rest of the year, April is Rio Branco's 7th-clearest and 11th-windiest month. For the whole year in context, see Rio Branco's year-round climate.

Daytime high
30°
7th warmest
Overnight low
22°
6th coldest
Rainfall
160 mm
22.8 wet days
Daylight
11 h 48 min
5:38 AM – 5:25 PM
Cloud cover
82%
7th clearest
Wind
5 km/h
11th windiest
Solar energy
4.44 kWh/m²
Travel score
3.2
out of 10

Rio Branco is human settlement in Acre, Brazil.

Founded
1882

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical April day in Rio Branco reaches about 30°C in the afternoon and slips back to 22°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°C. Set against its neighbours, April runs on par with March and on par with May.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13023
23023
33023
43023
53023
63023
73023
83023
93023
103023
113023
123023
133022
143022
153022
163022
173022
183022
193022
203022
213022
223022
233022
243022
253022
263022
273022
283022
293022
303022

How April really feels in Rio Branco

Once humidity and wind are folded in, April averages 30 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
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in April is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Rio Branco weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°25527.712.52.8
Feb30° / 23°2402512.32.8
Mar30° / 23°24927.212.12.8
Apr30° / 22°16022.811.83.2
May30° / 21°7615.411.54.3
Jun30° / 20°306.811.45.3
Jul31° / 20°214.211.55.1
Aug33° / 20°386.311.74.0
Sep33° / 22°7611.911.93.2
Oct33° / 23°13719.512.22.8
Nov31° / 23°19922.912.52.8
Dec30° / 23°24626.312.62.9

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 5% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 10% of April, with mostly cloudy or overcast conditions the remaining 86%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1991
2991
3991
41090
51090
61090
71090
81189
91189
101288
111288
121387
131387
141387
151387
161585
171585
181684
191684
201684
211684
221684
231882
241882
251981
261981
272080
282179
292179
302278

Chance of precipitation in April

Any precipitation

Rio Branco gets around 160 mm of rain over 22.8 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 75% and peaks near 86% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
186
286
385
484
583
682
781
880
979
1078
1177
1276
1375
1475
1574
1673
1773
1873
1972
2072
2172
2271
2371
2470
2569
2669
2768
2867
2966
3065

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April lands in the oppressive band about 55% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10025741
20025741
30025741
40035641
50035641
60035641
70035641
80035740
90145540
100145639
110145738
120145738
130245737
140255637
150255637
160255736
170255736
180255736
191355437
201355437
211355437
221355437
231365337
241365337
251365337
261365436
271375336
281375435
291385335
301485334

Wind in April

Winds average 5 km/h in April.

Across April, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
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
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 11 h 54 min at the start of April to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over April. Sunrise moves from 5:38 AM to 5:39 AM, and sunset from 5:33 PM to 5:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:385:33
211.95:385:33
311.95:385:32
411.95:385:32
511.95:385:31
611.95:385:30
711.95:385:30
811.95:385:29
911.85:385:29
1011.85:385:28
1111.85:385:28
1211.85:385:27
1311.85:385:26
1411.85:385:26
1511.85:385:25
1611.85:385:25
1711.85:385:24
1811.85:385:24
1911.85:385:23
2011.75:385:23
2111.75:385:22
2211.75:385:22
2311.75:385:21
2411.75:385:21
2511.75:385:20
2611.75:385:20
2711.75:395:20
2811.75:395:19
2911.75:395:19
3011.75:395:18

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.44 kWh/m².

For context, solar energy here swings from a low near 4.25 kWh/m² to a high of 5.57 kWh/m² in September across the year — April's 4.44 kWh/m² sits near the bottom.

012345151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.5Bright
94.5Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.5Bright
194.5Bright
204.4Bright
214.4Bright
224.4Bright
234.4Bright
244.4Bright
254.4Bright
264.4Bright
274.4Bright
284.4Bright
294.4Bright
304.4Bright
Planning a trip in April

Hazard calendar for Rio Branco

In seasonPeak

In April, Rio Branco sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Rio Branco's rainy season runs October–April, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is April a good time to visit Rio Branco?

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

3.2
Sightseeing
5th-best month of the year
4.6
Beach & pool
7th-best month of the year

April is a weaker month for outdoor sightseeing in Rio Branco.

What to pack for Rio Branco in April

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

In April, Rio Branco sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. About 23 days see rain.

light clothesrain gear

UV index in Rio Branco in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 Rio Branco peaks around January 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 12 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeJan 20UV 15Sep 12UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr13Extreme
May11Extreme
Jun9Very high
Jul8Very high
Aug7High
Sep4Moderate
Oct12Extreme
Nov13Extreme
Dec13Extreme

Air quality in Rio Branco in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in Rio Branco is worst in September — around 100 µg/m³ PM2.5 (unhealthy), about 12.4× the cleanest month (June, 8 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateUnhealthyModerateGoodSep 1394 µg/m³Jun 98 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar13Moderate
Apr10Good
May8Good
Jun8Good
Jul14Moderate
Aug65Unhealthy
Sep100Unhealthy
Oct27Moderate
Nov13Moderate
Dec11Good
Location & terrain

Where is Rio Branco?

Rio Branco sits at 10.0°S, 67.8°W, 153 m above sea level, in Brazil. The nearest listed city is Senador Guiomard, 21 km away.

Topography around Rio Branco

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

Within 3 km, the terrain around Rio Branco has only modest variations in elevation — a maximum elevation change of 50 m around an average of 142 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 103 m; within 80 km, only modest variations in elevation — a maximum elevation change of 165 m.

The land around Rio Branco is covered by artificial surfaces (54%) and trees (33%) within 3 km, trees (46%) and grassland (46%) within 16 km, and trees (61%) and grassland (38%) within 80 km.

3 km
50 m
16 km
103 m
80 km
165 m
treesgrasslandartificial surfaceswater
April weather nearby: Senador Guiomard 21 km · Porto Acre 53 km · Plácido de Castro 79 km · Xapuri 107 km · Sena Madureira 139 km · Boca do Acre 143 km · Brasiléia 155 km · Epitaciolândia 155 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 Rio Branco (-9.9747°, -67.81°, elevation 153 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).