Riberalta weather in May

In May, Riberalta sees average daytime highs of 29°C and overnight lows near 22°C, with 81 mm of rain across 15.7 wet days and about 11.5 hours of daylight. It is the 12th-warmest and 9th-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 18% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 11 h 36 min at the start of May to 11 h 24 min by month's end. Set against the rest of the year, May is Riberalta's 5th-clearest and 10th-windiest month. For the whole year in context, see Riberalta's year-round climate.

Daytime high
29°
12th warmest
Overnight low
22°
4th coldest
Rainfall
81 mm
15.7 wet days
Daylight
11 h 30 min
6:36 AM – 6:05 PM
Cloud cover
67%
5th clearest
Wind
6 km/h
10th windiest
Solar energy
4.24 kWh/m²
Travel score
4.5
out of 10

Riberalta is city of Bolivia.

Density
4,929/km²
people per km²
Founded
1897

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 Riberalta reaches about 29°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 26°C and 32°C. Set against its neighbours, May runs on par with April and on par with June.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13022
23022
33022
43022
53022
63022
73022
83022
93022
103022
112922
122922
132922
142922
152922
162922
172922
182922
192922
202922
212922
222922
232922
242922
252922
262922
272922
282922
292922
302921
312921

How May really feels in Riberalta

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.

Riberalta weather by month

How May compares with the rest of the year at a glance. May is the 12th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°26927.712.62.9
Feb30° / 23°25825.212.42.8
Mar30° / 23°25527.912.12.8
Apr30° / 23°17423.311.83.3
May29° / 22°8115.711.54.5
Jun30° / 21°34711.45.7
Jul30° / 20°244.811.45.8
Aug32° / 21°406.311.64.7
Sep32° / 23°8413.711.93.6
Oct32° / 23°15920.812.23.0
Nov31° / 23°22223.612.52.9
Dec30° / 23°2612712.62.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 63%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12773
22872
32971
43070
53169
63169
73367
83367
93268
103367
113268
123367
133466
143367
153466
163466
173565
183664
193664
203763
213961
223961
234060
244159
254357
264456
274555
284753
294852
305050
315248

Chance of precipitation in May

Any precipitation

Riberalta gets around 81 mm of rain over 15.7 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 51% and peaks near 65% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
165
264
363
462
561
660
759
858
957
1056
1156
1255
1355
1454
1553
1653
1752
1851
1950
2049
2147
2246
2345
2444
2543
2642
2740
2839
2938
3037
3135

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 45% of days. Sticky, muggy-or-worse air turns up on roughly 93% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
12483650
22483750
32483748
42493847
52493846
62493945
724103944
834104043
934104142
1034104141
1134104240
1234114240
1334114339
1434114338
1534114438
1624124437
1724124536
1824134535
1924134634
2024144733
2124144832
2224154831
2324154929
2424165028
2524165127
2624175225
2724175324
2824175423
2924175522
3024185620
3124175819

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 6 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
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 36 min at the start of May to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over May. Sunrise moves from 6:33 AM to 6:39 AM, and sunset from 6:10 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:336:10
211.66:336:09
311.66:336:09
411.66:336:09
511.66:346:08
611.66:346:08
711.66:346:08
811.66:346:07
911.56:346:07
1011.56:346:07
1111.56:356:07
1211.56:356:06
1311.56:356:06
1411.56:356:06
1511.56:356:06
1611.56:366:05
1711.56:366:05
1811.56:366:05
1911.56:366:05
2011.56:376:05
2111.56:376:04
2211.56:376:04
2311.56:376:04
2411.46:376:04
2511.46:386:04
2611.46:386:04
2711.46:386:04
2811.46:396:04
2911.46:396:04
3011.46:396:04
3111.46:396:04

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.24 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.24 kWh/m² to a high of 5.61 kWh/m² in September across the year — May's 4.24 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.2Bright
174.2Bright
184.2Bright
194.2Bright
204.2Bright
214.2Bright
224.2Bright
234.2Bright
244.2Bright
254.1Bright
264.1Bright
274.1Bright
284.1Bright
294.1Bright
304.1Bright
314.2Bright
Planning a trip in May

Hazard calendar for Riberalta

In seasonPeak

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

Riberalta'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 May a good time to visit Riberalta?

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

4.5
Sightseeing
4th-best month of the year
5.9
Beach & pool
4th-best month of the year

May is a reasonable time to visit Riberalta for sightseeing.

What to pack for Riberalta in May

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

In May, Riberalta sees daytime highs around 29°C and nights near 22°C. Pack light clothes and rain gear. About 16 days see rain.

light clothesrain gear

UV index in Riberalta in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Riberalta peaks around January 22 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 22UV 15Sep 12UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May10Extreme
Jun9Very high
Jul8Very high
Aug7High
Sep4Moderate
Oct12Extreme
Nov13Extreme
Dec14Extreme

Air quality in Riberalta 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 Riberalta is worst in September — around 58 µg/m³ PM2.5 (unhealthy), about 7.3× the cleanest month (May, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModeratePoorModerateSep 1455 µg/m³May 218 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb13Moderate
Mar13Moderate
Apr10Good
May8Good
Jun8Good
Jul15Moderate
Aug40Poor
Sep58Unhealthy
Oct27Moderate
Nov14Moderate
Dec11Good
Location & terrain

Where is Riberalta?

Riberalta sits at 11.0°S, 66.1°W, 145 m above sea level, in Bolivia. The nearest listed city is Guayaramerín, 79 km away.

Nova MamoréPlácido de CastroSenador GuiomardRio BrancoPorto AcreBuritis

Topography around Riberalta

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

Within 3 km, the terrain around Riberalta has only modest variations in elevation — a maximum elevation change of 51 m around an average of 135 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 83 m; within 80 km, only modest variations in elevation — a maximum elevation change of 101 m.

The land around Riberalta is covered by artificial surfaces (41%), grassland (27%) and trees (21%) within 3 km, trees (71%) within 16 km, and trees (91%) within 80 km.

3 km
51 m
16 km
83 m
80 km
101 m
treesshrubsgrasslandartificial surfaceswaterwetland
May weather nearby: Guayaramerín 79 km · Guajará Mirim 82 km · Nova Mamoré 104 km · Plácido de Castro 145 km · Senador Guiomard 208 km · Rio Branco 224 km · Porto Acre 226 km · Buritis 259 km

Bolivia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C
230 V · 50 Hz
Prices
≈ 40% of US
price level, 2025
GDP per capita
$5,148
2025
Happiness
5.8 / 10
World Happiness, 2025
Homicide rate
4.4
per 100k, 2023
Road deaths
21.1
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Moderate
EF EPI 521
Religion
Roman Catholic 65%Protestant 20%none 6%other 5%

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 Riberalta (-11.0103°, -66.0526°, elevation 145 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).