San Juan Bautista weather in December

In December, San Juan Bautista sees average daytime highs of 32°C and overnight lows near 21°C, with 170 mm of rain across 12 wet days and about 13.6 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Highs climb over the month, from about 31°C in the first days to 32°C by the end. The sky is clear or mostly clear about 43% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 13 h 36 min at the start of December to 13 h 42 min by month's end. Set against the rest of the year, December is San Juan Bautista's 7th-clearest and 8th-windiest month. For the whole year in context, see San Juan Bautista's year-round climate.

Daytime high
32°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
170 mm
12 wet days
Daylight
13 h 42 min
5:55 AM – 7:35 PM
Cloud cover
52%
7th clearest
Wind
12 km/h
8th windiest
Solar energy
6.75 kWh/m²
Travel score
4.1
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 31°C in the first days to 32°C by the end.

A typical December day in San Juan Bautista reaches about 32°C in the afternoon and slips back to 21°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 36°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.

15°20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13120
23120
33120
43120
53120
63120
73121
83121
93121
103121
113121
123121
133221
143221
153221
163221
173221
183221
193221
203221
213222
223222
233222
243222
253222
263222
273222
283222
293222
303222
313322

How December really feels in San Juan Bautista

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

San Juan Bautista weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 22°12512.213.53.5
Feb32° / 22°1361212.93.8
Mar31° / 21°1251112.24.7
Apr28° / 18°1559.611.46.4
May24° / 15°1348.710.77.1
Jun22° / 13°1148.410.46.9
Jul22° / 12°948.210.57.1
Aug24° / 13°767.211.17.7
Sep26° / 15°1339.211.87.0
Oct28° / 18°18811.912.65.9
Nov30° / 19°16710.613.35.2
Dec32° / 21°1701213.64.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% 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 42%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25743
35743
45743
55743
65743
75842
85842
95842
105941
115941
126040
136040
146040
156040
166040
176040
186040
196040
206040
216040
225941
235842
245743
255743
265743
275644
285743
295743
305743
315842

Chance of precipitation in December

Any precipitation

San Juan Bautista gets around 170 mm of rain over 12 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 39% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
237
337
437
537
637
736
836
936
1036
1136
1237
1337
1438
1538
1639
1739
1839
1940
2040
2140
2241
2341
2442
2542
2642
2742
2842
2941
3041
3140

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 39% of days. Sticky, muggy-or-worse air turns up on roughly 74% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
15112035281
25102035291
35102035301
45102034301
5591934311
6591934321
7591934331
8591834331
9481834341
10481834352
11481733362
12481733362
13481733372
14381633382
15371633392
16371533392
17371533402
18271433413
19271432423
20261432424
21261431434
22261330445
23161329456
24161329456
25161328457
26151327458
27151327459
28151326459
291613264510
301613254511
311613254511

Wind in December

Winds average 12 km/h in December.

Across December, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 36 min at the start of December to 13 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 5:52 AM to 6:02 AM, and sunset from 7:25 PM to 7:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:527:25
213.65:527:26
313.65:527:26
413.65:527:27
513.65:527:28
613.65:527:28
713.65:527:29
813.65:527:30
913.65:537:30
1013.65:537:31
1113.65:537:32
1213.65:537:32
1313.75:547:33
1413.75:547:34
1513.75:547:34
1613.75:557:35
1713.75:557:35
1813.75:557:36
1913.75:567:36
2013.75:567:37
2113.75:577:37
2213.75:577:38
2313.75:587:38
2413.75:587:39
2513.75:597:39
2613.75:597:40
2713.76:007:40
2813.76:007:40
2913.76:017:41
3013.76:017:41
3113.76:027:41

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.75 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.66 kWh/m² to a high of 6.75 kWh/m² in December across the year — December's 6.75 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.6Intense
26.6Intense
36.6Intense
46.6Intense
56.7Intense
66.7Intense
76.7Intense
86.7Intense
96.7Intense
106.7Intense
116.8Intense
126.8Intense
136.8Intense
146.8Intense
156.8Intense
166.8Intense
176.8Intense
186.8Intense
196.8Intense
206.8Intense
216.8Intense
226.8Intense
236.8Intense
246.8Intense
256.8Intense
266.8Intense
276.8Intense
286.8Intense
296.8Intense
306.8Intense
316.8Intense
Planning a trip in December

Is December a good time to visit San Juan Bautista?

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

4.1
Sightseeing
10th-best month of the year
6.3
Beach & pool
7th-best month of the year

December is a reasonable time to visit San Juan Bautista for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for San Juan Bautista in December

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

In December, San Juan Bautista sees daytime highs around 32°C and nights near 21°C. Pack light clothes and sun protection. Worth having: rain gear. About 12 days see rain.

light clothessun protectionrain gear

UV index in San Juan Bautista in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December 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 San Juan Bautista peaks around January 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateVery highExtremeJan 18UV 14Jun 20UV 4
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr8Very high
May6High
Jun4Moderate
Jul4Moderate
Aug5Moderate
Sep8Very high
Oct7Very high
Nov12Extreme
Dec13Extreme

Air quality in San Juan Bautista 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 Juan Bautista is worst in September — around 19 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (May, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodSep 1119 µg/m³May 157 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb14Moderate
Mar9Good
Apr8Good
May7Good
Jun8Good
Jul11Good
Aug17Moderate
Sep19Moderate
Oct12Good
Nov9Good
Dec7Good
Location & terrain

Where is San Juan Bautista?

San Juan Bautista sits at 26.7°S, 57.1°W, 103 m above sea level, in Paraguay. The nearest listed city is Caazapá, 93 km away.

CaazapáItuzaingóFormosaPilarVillarricaItáCaacupéItauguá

Topography around San Juan Bautista

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

Within 3 km, the terrain around San Juan Bautista has only modest variations in elevation — a maximum elevation change of 62 m around an average of 108 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 119 m; within 80 km, significant variations in elevation — a maximum elevation change of 491 m.

The land around San Juan Bautista is covered by grassland (55%) and trees (39%) within 3 km, grassland (71%) within 16 km, and grassland (58%) within 80 km.

3 km
62 m
16 km
119 m
80 km
491 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Caazapá 93 km · Ituzaingó 111 km · Formosa 116 km · Pilar 118 km · Villarrica 124 km · Itá 132 km · Caacupé 143 km · Itauguá 144 km

Paraguay travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B / C / N
220 V · 50 Hz
Prices
≈ 35% of US
price level, 2025
GDP per capita
$7,027
2025
Happiness
6.2 / 10
World Happiness, 2025
Safe drinking water
64%
of population, 2024
Homicide rate
6.8
per 100k, 2023
Road deaths
22
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 531
Religion
Roman Catholic 80%Protestant 7%Believer 6%other 1%

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 Juan Bautista (-26.6703°, -57.1407°, elevation 103 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).