San Ignacio de Velasco weather in December

In December, San Ignacio de Velasco sees average daytime highs of 30°C and overnight lows near 22°C, with 151 mm of rain across 19.9 wet days and about 13 hours of daylight. It is the 4th-warmest and 3rd-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 7% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 54 min at the start of December to 13 hours by month's end. Set against the rest of the year, December is San Ignacio de Velasco's 10th-clearest and 6th-windiest month. For the whole year in context, see San Ignacio de Velasco's year-round climate.

Daytime high
30°
4th warmest
Overnight low
22°
12th coldest
Rainfall
151 mm
19.9 wet days
Daylight
13 hours
5:31 AM – 6:29 PM
Cloud cover
78%
10th clearest
Wind
10 km/h
6th windiest
Solar energy
5.64 kWh/m²
Travel score
3.6
out of 10

San Ignacio de Velasco is city in Bolivia.

Founded
1748

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 San Ignacio de Velasco 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 27°C and 33°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)
13022
23022
33022
43022
53022
63022
73022
83022
93022
103022
113022
123022
133022
143022
153022
163022
173022
183022
193022
203022
213022
223022
233022
243022
253022
263022
273022
283022
293022
303022
313022

How December really feels in San Ignacio de Velasco

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.

San Ignacio de Velasco weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°16922.412.93.5
Feb29° / 22°17421.512.63.5
Mar29° / 21°14720.112.13.9
Apr29° / 20°6912.211.65.2
May27° / 18°437.911.26.8
Jun27° / 17°233.9117.6
Jul28° / 16°182.911.17.7
Aug30° / 18°213.311.56.0
Sep31° / 20°477.111.94.7
Oct32° / 21°8613.412.43.8
Nov31° / 21°12016.112.83.9
Dec30° / 22°15119.9133.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 77%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12377
22278
32278
42278
52278
62179
72179
82179
92278
102377
112377
122476
132476
142476
152476
162476
172575
182575
192575
202575
212575
222575
232377
242377
252278
262278
272278
282179
292179
302179
312179

Chance of precipitation in December

Any precipitation

San Ignacio de Velasco gets around 151 mm of rain over 19.9 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 65% and peaks near 71% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
163
264
364
464
565
665
764
864
964
1064
1164
1263
1363
1463
1563
1663
1762
1862
1962
2062
2163
2263
2364
2465
2566
2667
2768
2869
2970
3071
3171

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 85% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
10131779
20131680
30131680
40131680
50131680
60121582
70121582
81121581
91121581
101121581
111121482
121121482
131121383
141121383
151111384
161111285
171111285
181111186
191111186
201111186
211111087
22012988
23012988
24012889
25012889
26012889
27012790
28002791
29002791
30002791
31002791

Wind in December

Winds average 10 km/h in December.

Across December, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 54 min at the start of December to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 5:26 AM to 5:38 AM, and sunset from 6:21 PM to 6:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:266:21
212.95:276:21
312.95:276:22
412.95:276:23
512.95:276:23
612.95:286:24
712.95:286:24
812.95:286:25
912.95:286:25
1013.05:296:26
1113.05:296:26
1213.05:296:27
1313.05:306:28
1413.05:306:28
1513.05:316:29
1613.05:316:29
1713.05:316:30
1813.05:326:30
1913.05:326:31
2013.05:336:31
2113.05:336:32
2213.05:346:32
2313.05:346:33
2413.05:356:33
2513.05:356:33
2613.05:366:34
2713.05:366:34
2813.05:376:35
2913.05:376:35
3013.05:386:36
3113.05:386:36

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.64 kWh/m².

For context, solar energy here swings from a low near 3.88 kWh/m² to a high of 5.75 kWh/m² in October across the year — December's 5.64 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.6Bright
305.6Bright
315.6Bright
Planning a trip in December

Hazard calendar for San Ignacio de Velasco

In seasonPeak

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

San Ignacio de Velasco's rainy season runs October–March, 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 San Ignacio de Velasco?

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

3.6
Sightseeing
10th-best month of the year
5.1
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in San Ignacio de Velasco.

What to pack for San Ignacio de Velasco in December

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

In December, San Ignacio de Velasco sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

UV index in San Ignacio de Velasco 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 San Ignacio de Velasco peaks around January 18 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 14 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 18UV 16Sep 14UV 5
UV index (midday)Level
Jan16Extreme
Feb15Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun7Very high
Jul8Very high
Aug8Very high
Sep4Moderate
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in San Ignacio de Velasco 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 San Ignacio de Velasco is worst in September — around 91 µg/m³ PM2.5 (unhealthy), about 12.7× the cleanest month (April, 7 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateUnhealthyPoorModerateSep 1586 µg/m³Apr 148 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb10Good
Mar9Good
Apr7Good
May11Good
Jun20Moderate
Jul27Moderate
Aug55Poor
Sep91Unhealthy
Oct43Poor
Nov36Poor
Dec15Moderate
Location & terrain

Where is San Ignacio de Velasco?

San Ignacio de Velasco sits at 16.4°S, 61.0°W, 582 m above sea level, in Bolivia. The nearest listed city is Vila Bela da Santíssima Trindade, 187 km away.

Vila Bela da Santíssima TrindadePontes e LacerdaAscención de GuarayosMonteroWarnesCotocaSanta CruzSão José dos Quatro Marcos

Topography around San Ignacio de Velasco

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Ignacio de Velasco.

Within 3 km, the terrain around San Ignacio de Velasco has only modest variations in elevation — a maximum elevation change of 96 m around an average of 408 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 270 m; within 80 km, significant variations in elevation — a maximum elevation change of 508 m.

The land around San Ignacio de Velasco is covered by trees (49%) and grassland (21%) within 3 km, trees (73%) and grassland (21%) within 16 km, and trees (79%) within 80 km.

3 km
96 m
16 km
270 m
80 km
508 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Vila Bela da Santíssima Trindade 187 km · Pontes e Lacerda 216 km · Ascención de Guarayos 244 km · Montero 266 km · Warnes 266 km · Cotoca 273 km · Santa Cruz 283 km · São José dos Quatro Marcos 310 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 San Ignacio de Velasco (-16.3777°, -60.9647°, elevation 582 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).