Balsas weather in December

In December, Balsas sees average daytime highs of 31°C and overnight lows near 23°C, with 157 mm of rain across 19.4 wet days and about 12.4 hours of daylight. It is the 9th-warmest and 4th-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 13% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 24 min at the start of December to 12 h 24 min by month's end. Set against the rest of the year, December is Balsas's 9th-clearest and 9th-windiest month. For the whole year in context, see Balsas's year-round climate.

Daytime high
31°
9th warmest
Overnight low
23°
9th coldest
Rainfall
157 mm
19.4 wet days
Daylight
12 h 24 min
5:47 AM – 6:13 PM
Cloud cover
74%
9th clearest
Wind
6 km/h
9th windiest
Solar energy
5.3 kWh/m²
Travel score
3.3
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 Balsas reaches about 31°C in the afternoon and slips back to 23°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 34°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13223
23223
33223
43223
53223
63223
73223
83123
93123
103123
113123
123123
133123
143123
153123
163123
173123
183123
193123
203123
213123
223123
233123
243123
253123
263123
273123
283122
293122
303122
313122

How December really feels in Balsas

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.

Balsas 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
Jan31° / 22°20424.612.43.0
Feb31° / 22°18022.112.23.0
Mar31° / 22°17823.512.13.1
Apr31° / 22°11015.511.83.6
May32° / 23°406.711.74.1
Jun33° / 22°20.511.64.5
Jul33° / 22°10.211.64.4
Aug35° / 22°10.211.83.6
Sep35° / 24°91.8122.9
Oct34° / 24°557.712.23.0
Nov32° / 23°12115.312.33.3
Dec31° / 23°15719.412.43.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% 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 72%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13268
23268
33268
43268
53268
63169
73169
83169
93070
103070
113070
122971
132872
142872
152773
162773
172674
182674
192575
202674
212773
222773
232674
242674
252674
262674
272674
282674
292674
302575
312575

Chance of precipitation in December

Any precipitation

Balsas gets around 157 mm of rain over 19.4 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 64% and peaks near 72% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
157
257
357
458
558
659
759
860
961
1061
1162
1263
1364
1464
1565
1665
1765
1865
1965
2065
2165
2266
2366
2466
2567
2668
2768
2869
2970
3071
3172

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 89% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
111782
211683
311683
411584
511584
611485
711485
811386
911386
1001288
1101288
1201189
1301189
1401189
1501090
1601090
1701090
1801090
1901090
2001090
210991
220991
230991
240991
250991
260892
270892
280892
290892
300793
310793

Wind in December

Winds average 6 km/h in December.

Across December, daily wind ranges from about 5 km/h on the calmest days to 6 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
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
315calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 24 min at the start of December to 12 h 24 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 5:42 AM to 5:54 AM, and sunset from 6:06 PM to 6:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:426:06
212.45:426:07
312.45:426:07
412.45:436:08
512.45:436:08
612.45:436:08
712.45:446:09
812.45:446:09
912.45:446:10
1012.45:456:10
1112.45:456:11
1212.45:466:11
1312.45:466:12
1412.45:466:12
1512.45:476:13
1612.45:476:13
1712.45:486:14
1812.45:486:14
1912.45:496:15
2012.45:496:15
2112.45:496:16
2212.45:506:16
2312.45:506:17
2412.45:516:17
2512.45:516:18
2612.45:526:18
2712.45:526:19
2812.45:536:19
2912.45:536:19
3012.45:546:20
3112.45:546:20

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.3 kWh/m².

For context, solar energy here swings from a low near 5.03 kWh/m² to a high of 6.61 kWh/m² in September across the year — December's 5.3 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.4Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.1Bright
305.1Bright
315.1Bright
Planning a trip in December

Hazard calendar for Balsas

In seasonPeak

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

Balsas'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 Balsas?

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

3.3
Sightseeing
6th-best month of the year
5.0
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Balsas.

What to pack for Balsas in December

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

In December, Balsas sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 19 days see rain.

light clothesrain gearsun protection

UV index in Balsas 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 Balsas peaks around February 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 20UV 15Jun 22UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug11Extreme
Sep13Extreme
Oct13Extreme
Nov12Extreme
Dec11Extreme

Air quality in Balsas 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 Balsas is worst in September — around 27 µg/m³ PM2.5 (moderate), about 4.3× the cleanest month (June, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateSep 2027 µg/m³Jun 166 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb11Good
Mar12Good
Apr12Good
May7Good
Jun6Good
Jul8Good
Aug18Moderate
Sep27Moderate
Oct25Moderate
Nov16Moderate
Dec13Moderate
Location & terrain

Where is Balsas?

Balsas sits at 7.5°S, 46.0°W, 254 m above sea level, in Brazil. The nearest listed city is Riachão, 67 km away.

Topography around Balsas

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

Within 3 km, the terrain around Balsas has only modest variations in elevation — a maximum elevation change of 62 m around an average of 259 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 107 m; within 80 km, significant variations in elevation — a maximum elevation change of 455 m.

The land around Balsas is covered by artificial surfaces (36%), grassland (32%) and trees (23%) within 3 km, grassland (38%), trees (30%) and shrubs (26%) within 16 km, and trees (32%), shrubs (28%) and grassland (25%) within 80 km.

3 km
62 m
16 km
107 m
80 km
455 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
December weather nearby: Riachão 67 km · São Raimundo das Mangabeiras 83 km · Formosa da Serra Negra 122 km · Carolina 159 km · Uruçuí 167 km · Estreito 189 km · Grajaú 191 km · Sítio Novo 198 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 Balsas (-7.5325°, -46.0356°, elevation 254 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).