Guaraí weather in December

In December, Guaraí sees average daytime highs of 30°C and overnight lows near 22°C, with 234 mm of rain across 24.2 wet days and about 12.5 hours of daylight. It is the 9th-warmest and 4th-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 8% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 30 min at the start of December to 12 h 30 min by month's end. Set against the rest of the year, December is Guaraí's 9th-clearest and 8th-windiest month. For the whole year in context, see Guaraí's year-round climate.

Daytime high
30°
9th warmest
Overnight low
22°
9th coldest
Rainfall
234 mm
24.2 wet days
Daylight
12 h 30 min
5:55 AM – 6:26 PM
Cloud cover
80%
9th clearest
Wind
5 km/h
8th windiest
Solar energy
5.23 kWh/m²
Travel score
3.1
out of 10

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 Guaraí 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)
13123
23123
33123
43123
53123
63123
73123
83123
93123
103122
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 Guaraí

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.

Guaraí weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°27727.512.52.9
Feb30° / 22°2572512.32.9
Mar30° / 22°25726.812.12.9
Apr31° / 22°1622011.83.4
May32° / 22°598.911.64.2
Jun33° / 22°20.511.54.5
Jul34° / 21°10.211.54.2
Aug35° / 22°20.411.73.2
Sep35° / 23°253.711.92.8
Oct33° / 23°10713.912.23.2
Nov31° / 23°21021.312.43.1
Dec30° / 22°23424.212.53.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 80%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12179
22179
32179
42179
52179
62179
72179
82080
92080
102080
112080
121981
132080
142080
152080
162080
171981
182080
192080
202080
212080
222080
232080
242080
252080
262080
271981
281981
291981
301981
311882

Chance of precipitation in December

Any precipitation

Guaraí gets around 234 mm of rain over 24.2 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 79% and peaks near 85% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
173
273
373
474
574
675
775
876
976
1077
1177
1278
1378
1479
1579
1680
1780
1880
1980
2081
2181
2281
2381
2482
2582
2682
2783
2884
2984
3085
3185

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 98% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)
1595
2496
3496
4496
5496
6397
7397
8397
9397
10298
11298
12298
13298
14298
15298
16298
17298
18298
19298
20298
21298
22199
23199
24199
25199
26199
27199
28199
29199
30199
31298

Wind in December

Winds average 5 km/h in December.

Across December, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 30 min at the start of December to 12 h 30 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 5:49 AM to 6:02 AM, and sunset from 6:18 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:496:18
212.55:506:19
312.55:506:19
412.55:506:20
512.55:516:20
612.55:516:21
712.55:516:21
812.55:526:22
912.55:526:22
1012.55:526:23
1112.55:536:23
1212.55:536:24
1312.55:546:24
1412.55:546:25
1512.55:546:25
1612.55:556:26
1712.55:556:26
1812.55:566:27
1912.55:566:27
2012.55:576:28
2112.55:576:28
2212.55:586:28
2312.55:586:29
2412.55:596:29
2512.55:596:30
2612.55:596:30
2712.56:006:31
2812.56:006:31
2912.56:016:32
3012.56:016:32
3112.56:026:32

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.23 kWh/m².

For context, solar energy here swings from a low near 4.9 kWh/m² to a high of 6.15 kWh/m² in September across the year — December's 5.23 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
315.1Bright
Planning a trip in December

Hazard calendar for Guaraí

In seasonPeak

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

Guaraí's monsoon runs November–April, when most of the year's rain falls.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Guaraí?

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

3.1
Sightseeing
7th-best month of the year
4.4
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Guaraí.

What to pack for Guaraí in December

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

In December, Guaraí sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 24 days see rain.

light clothesrain gearsun protection

UV index in Guaraí in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Guaraí peaks around February 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 18UV 15Jun 22UV 9
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar14Extreme
Apr13Extreme
May10Extreme
Jun9Very high
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct10Extreme
Nov12Extreme
Dec11Extreme

Air quality in Guaraí 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 Guaraí is worst in October — around 40 µg/m³ PM2.5 (poor), about 5.3× the cleanest month (June, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateOct 1238 µg/m³Jun 208 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb11Good
Mar12Good
Apr11Good
May9Good
Jun8Good
Jul8Good
Aug15Moderate
Sep34Moderate
Oct40Poor
Nov16Moderate
Dec14Moderate
Location & terrain

Where is Guaraí?

Guaraí sits at 8.8°S, 48.5°W, 260 m above sea level, in Brazil. The nearest listed city is Miracema do Tocantins, 83 km away.

Topography around Guaraí

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

Within 3 km, the terrain around Guaraí has only modest variations in elevation — a maximum elevation change of 114 m around an average of 272 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 416 m; within 80 km, significant variations in elevation — a maximum elevation change of 552 m.

The land around Guaraí is covered by grassland (47%) and trees (26%) within 3 km, grassland (55%) and trees (37%) within 16 km, and grassland (54%) and trees (37%) within 80 km.

3 km
114 m
16 km
416 m
80 km
552 m
treesshrubsgrasslandcroplandartificial surfaces
December weather nearby: Miracema do Tocantins 83 km · Colinas do Tocantins 86 km · Conceição do Araguaia 105 km · Santa Maria das Barreiras 132 km · Palmas 150 km · Paraíso do Tocantins 154 km · Araguaína 186 km · Redenção 190 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 Guaraí (-8.8342°, -48.5103°, elevation 260 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).