Riberalta weather in December

In December, Riberalta sees average daytime highs of 30°C and overnight lows near 23°C, with 261 mm of rain across 27 wet days and about 12.6 hours of daylight. It is the 5th-warmest and 2nd-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 2% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 36 min at the start of December to 12 h 36 min by month's end. Set against the rest of the year, December is Riberalta's 9th-clearest and 2nd-windiest month. For the whole year in context, see Riberalta's year-round climate.

Daytime high
30°
5th warmest
Overnight low
23°
12th coldest
Rainfall
261 mm
27 wet days
Daylight
12 h 36 min
6:01 AM – 6:40 PM
Cloud cover
86%
9th clearest
Wind
7 km/h
2nd windiest
Solar energy
4.93 kWh/m²
Travel score
2.8
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 December

Average highAverage lowShaded bands: 10–90% of days

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

A typical December day in Riberalta 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 28°C and 32°C. Set against its neighbours, December runs on par with November and on par with January.

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
283023
293023
303023
313023

How December really feels in Riberalta

Once humidity and wind are folded in, December 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 December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Riberalta weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 2nd-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 6% of December, with mostly cloudy or overcast conditions the remaining 91%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1793
2892
3892
4892
5892
6892
7892
8892
9892
10991
11991
12991
13991
14991
15991
161090
171090
181090
19991
20991
21991
22991
23991
24991
25991
26892
27793
28793
29793
30694
31694

Chance of precipitation in December

Any precipitation

Riberalta gets around 261 mm of rain over 27 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 87% and peaks near 88% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
186
286
386
486
587
687
787
887
988
1088
1188
1288
1388
1488
1588
1688
1788
1888
1988
2088
2188
2287
2387
2487
2587
2687
2787
2887
2987
3086
3186

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the oppressive band about 50% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
104456
204456
304456
404456
504456
604555
704555
804555
904654
1004654
1104753
1204753
1304852
1404852
1504951
1605050
1705149
1815148
1915148
2015247
2115346
2215445
2315445
2405644
2505644
2605644
2705644
2805644
2905743
3005743
3105743

Wind in December

Winds average 7 km/h in December.

Across December, 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
166calm
176calm
186calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 36 min at the start of December to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 5:56 AM to 6:08 AM, and sunset from 6:32 PM to 6:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:566:32
212.65:566:32
312.65:576:33
412.65:576:33
512.65:576:34
612.65:576:34
712.65:586:35
812.65:586:36
912.65:586:36
1012.65:596:37
1112.65:596:37
1212.66:006:38
1312.66:006:38
1412.66:006:39
1512.66:016:39
1612.66:016:40
1712.66:026:40
1812.66:026:41
1912.66:026:41
2012.66:036:42
2112.66:036:42
2212.66:046:43
2312.66:046:43
2412.66:056:43
2512.66:056:44
2612.66:066:44
2712.66:066:45
2812.66:076:45
2912.66:076:46
3012.66:086:46
3112.66:086:46

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.93 kWh/m².

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 — December's 4.93 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
154.9Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in December

Hazard calendar for Riberalta

In seasonPeak

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

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 December a good time to visit Riberalta?

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

2.8
Sightseeing
10th-best month of the year
4.0
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Riberalta.

What to pack for Riberalta in December

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

In December, Riberalta sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

UV index in Riberalta in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 14 (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 December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December 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
December 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).