Guaíra weather in December

In December, Guaíra sees average daytime highs of 31°C and overnight lows near 22°C, with 164 mm of rain across 15.7 wet days and about 13.5 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 30% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 13 h 24 min at the start of December to 13 h 30 min by month's end. Set against the rest of the year, December is Guaíra's 12th-clearest and 8th-windiest month. For the whole year in context, see Guaíra's year-round climate.

Daytime high
31°
3rd warmest
Overnight low
22°
10th coldest
Rainfall
164 mm
15.7 wet days
Daylight
13 h 30 min
6:49 AM – 8:18 PM
Cloud cover
62%
12th clearest
Wind
8 km/h
8th windiest
Solar energy
6.31 kWh/m²
Travel score
3.9
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical December day in Guaíra reaches about 31°C in the afternoon and slips back to 22°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 34°C. Set against its neighbours, December runs about 1°C warmer than November and on par with January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13121
23121
33121
43121
53121
63121
73121
83121
93121
103122
113122
123122
133122
143122
153122
163122
173122
183122
193122
203122
213122
223122
233122
243122
253122
263122
273122
283122
293122
303122
313122

How December really feels in Guaíra

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.

Guaíra 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
Jan31° / 22°14717.613.33.6
Feb31° / 22°14915.412.83.8
Mar30° / 21°10712.812.24.5
Apr28° / 19°958.311.56.1
May25° / 16°1268.810.97.1
Jun24° / 15°1078.110.57.4
Jul24° / 14°896.910.77.6
Aug26° / 15°886.511.27.6
Sep28° / 17°1278.811.96.7
Oct29° / 19°16512.812.65.0
Nov30° / 20°14812.513.24.7
Dec31° / 22°16415.713.53.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of December, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24555
34555
44456
54456
64357
74456
84456
94456
104555
114555
124753
134753
144753
154852
164852
174852
184951
194951
204951
214852
224753
234753
244654
254555
264555
274555
284555
294555
304555
314555

Chance of precipitation in December

Any precipitation

Guaíra gets around 164 mm of rain over 15.7 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 51% and peaks near 57% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
147
248
348
449
549
649
749
849
948
1048
1148
1248
1348
1448
1548
1648
1749
1849
1949
2050
2151
2252
2353
2454
2555
2656
2756
2856
2956
3057
3157

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 55% of days. Sticky, muggy-or-worse air turns up on roughly 88% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1151337431
2151237451
3151236451
4141136471
5141136481
6141035491
7141035491
8041034511
9031034521
10031034521
11031033531
12031033531
13031032541
14031032541
15021032551
16021032551
17021032551
18021032551
19021031561
20021031561
2102930581
2201929601
2301829611
2401828612
2501727632
2601727632
2701627642
2801626652
2901626643
3001526653
3101525663

Wind in December

Winds average 8 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 24 min at the start of December to 13 h 30 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 6:45 AM to 6:56 AM, and sunset from 8:08 PM to 8:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.46:458:08
213.46:458:09
313.46:458:10
413.46:468:10
513.46:468:11
613.46:468:12
713.46:468:12
813.46:468:13
913.46:478:13
1013.56:478:14
1113.56:478:15
1213.56:478:15
1313.56:488:16
1413.56:488:16
1513.56:488:17
1613.56:498:18
1713.56:498:18
1813.56:508:19
1913.56:508:19
2013.56:508:20
2113.56:518:20
2213.56:518:21
2313.56:528:21
2413.56:528:22
2513.56:538:22
2613.56:538:22
2713.56:548:23
2813.56:548:23
2913.56:558:24
3013.56:558:24
3113.56:568:24

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.31 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.07 kWh/m² to a high of 6.31 kWh/m² in December across the year — December's 6.31 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.4Intense
166.4Intense
176.4Intense
186.4Intense
196.4Intense
206.4Intense
216.4Intense
226.4Intense
236.4Intense
246.4Intense
256.4Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
316.3Intense
Planning a trip in December

Is December a good time to visit Guaíra?

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

3.9
Sightseeing
10th-best month of the year
5.8
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Guaíra.

What to pack for Guaíra in December

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

In December, Guaíra sees daytime highs around 31°C and nights near 22°C. Pack light clothes, rain gear and sun protection. About 16 days see rain.

light clothesrain gearsun protection

UV index in Guaíra 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 Guaíra peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeJan 19UV 15Jul 10UV 5
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May6High
Jun5High
Jul5High
Aug7Very high
Sep6High
Oct10Extreme
Nov12Extreme
Dec14Extreme

Air quality in Guaíra 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 Guaíra is worst in September — around 26 µg/m³ PM2.5 (moderate), about 4.7× the cleanest month (March, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1525 µg/m³Mar 166 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb7Good
Mar6Good
Apr7Good
May8Good
Jun8Good
Jul7Good
Aug17Moderate
Sep26Moderate
Oct13Moderate
Nov9Good
Dec7Good
Location & terrain

Where is Guaíra?

Guaíra sits at 24.1°S, 54.2°W, 256 m above sea level, in Brazil. The nearest listed city is Terra Roxa, 17 km away.

Topography around Guaíra

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

Within 3 km, the terrain around Guaíra has only modest variations in elevation — a maximum elevation change of 71 m around an average of 239 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 152 m; within 80 km, significant variations in elevation — a maximum elevation change of 334 m.

The land around Guaíra is covered by water (26%), grassland (22%) and trees (21%) within 3 km, cropland (46%), grassland (22%) and trees (20%) within 16 km, and cropland (58%) within 80 km.

3 km
71 m
16 km
152 m
80 km
334 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Terra Roxa 17 km · Altônia 42 km · Palotina 47 km · Iporã 56 km · Marechal Cândido Rondon 56 km · Itaquiraí 68 km · Assis Chateaubriand 83 km · Toledo 87 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 Guaíra (-24.082°, -54.2462°, elevation 256 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).