Posto da Mata weather in December

In December, Posto da Mata sees average daytime highs of 30°C and overnight lows near 23°C, with 135 mm of rain across 15.2 wet days and about 13.1 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 20% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 13 hours at the start of December to 13 h 06 min by month's end. Set against the rest of the year, December is Posto da Mata's 11th-clearest and 4th-windiest month. For the whole year in context, see Posto da Mata's year-round climate.

Daytime high
30°
4th warmest
Overnight low
23°
9th coldest
Rainfall
135 mm
15.2 wet days
Daylight
13 h 06 min
5:04 AM – 6:08 PM
Cloud cover
70%
11th clearest
Wind
11 km/h
4th windiest
Solar energy
5.94 kWh/m²
Travel score
4.4
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 Posto da Mata reaches about 30°C in the afternoon and slips back to 23°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 32°C. Set against its neighbours, December runs about 1°C warmer than November and about 1°C cooler than January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12923
22923
32923
42923
52923
62923
72923
83023
93023
103023
113023
123023
133023
143023
153023
163023
173023
183023
193023
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023
313023

How December really feels in Posto da Mata

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.

Posto da Mata 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
Jan31° / 23°9613.6134.3
Feb31° / 23°6812.812.64.1
Mar30° / 23°13917.912.14.0
Apr29° / 22°9217.311.64.5
May28° / 21°6213.911.25.9
Jun27° / 20°4511.310.96.5
Jul26° / 19°4511.3116.7
Aug26° / 19°369.311.46.9
Sep27° / 20°418.911.96.6
Oct28° / 21°8512.112.45.6
Nov29° / 22°16216.112.84.7
Dec30° / 23°13515.213.14.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 64%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12872
22971
32971
42971
52971
63070
73169
83169
93169
103268
113367
123466
133466
143664
153763
163763
173862
184060
194060
204060
214060
224159
234159
244159
254159
264258
274258
284258
294159
304159
314159

Chance of precipitation in December

Any precipitation

Posto da Mata gets around 135 mm of rain over 15.2 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 49% and peaks near 57% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
157
256
356
455
555
654
754
853
952
1051
1151
1250
1349
1448
1548
1647
1747
1847
1946
2046
2146
2246
2345
2445
2545
2645
2745
2844
2944
3044
3145

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 (%)Miserable (%)
1113842
2112852
3112852
4111853
5111853
6111853
7010873
8010873
9010873
1009883
1109883
1208893
1308893
1408893
1507903
1607903
1706913
1806913
1906913
2006922
2105932
2205932
2305932
2405932
2505932
2605932
2706922
2806922
2906922
3006922
3106922

Wind in December

Winds average 11 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
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm
3112calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 hours at the start of December to 13 h 06 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 4:59 AM to 5:11 AM, and sunset from 5:59 PM to 6:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.04:595:59
213.05:006:00
313.05:006:00
413.05:006:01
513.05:006:01
613.05:006:02
713.05:016:03
813.05:016:03
913.05:016:04
1013.05:016:04
1113.15:026:05
1213.15:026:05
1313.15:026:06
1413.15:036:07
1513.15:036:07
1613.15:046:08
1713.15:046:08
1813.15:046:09
1913.15:056:09
2013.15:056:10
2113.15:066:10
2213.15:066:11
2313.15:076:11
2413.15:076:11
2513.15:086:12
2613.15:086:12
2713.15:096:13
2813.15:096:13
2913.15:106:14
3013.15:106:14
3113.15:116:14

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.94 kWh/m².

For context, solar energy here swings from a low near 3.58 kWh/m² to a high of 6.31 kWh/m² in January across the year — December's 5.94 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.5Bright
35.5Bright
45.5Bright
55.6Bright
65.6Bright
75.7Bright
85.7Bright
95.8Bright
105.8Bright
115.8Bright
125.9Bright
135.9Bright
145.9Bright
156.0Bright
166.0Intense
176.0Intense
186.1Intense
196.1Intense
206.1Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.3Intense
296.3Intense
306.3Intense
316.3Intense
Planning a trip in December

Is December a good time to visit Posto da Mata?

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

4.4
Sightseeing
9th-best month of the year
5.9
Beach & pool
9th-best month of the year

December is a reasonable time to visit Posto da Mata for sightseeing.

What to pack for Posto da Mata in December

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

In December, Posto da Mata sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

Sea temperature near Posto da Mata in December

The nearest coast averages about 27°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 36 km away) is warmest in March at about 28°C and coldest in August near 24°C.

The water stays above 20°C all year — warm enough for a swim any month.

22°24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar28Warm
Apr28Warm
May26Warm
Jun25Warm
Jul24Warm
Aug24Warm
Sep25Warm
Oct26Warm
Nov26Warm
Dec27Warm

UV index in Posto da Mata 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 Posto da Mata peaks around February 14 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 14UV 14Jun 22UV 7
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar13Extreme
Apr11Extreme
May8Very high
Jun7Very high
Jul7Very high
Aug9Very high
Sep10Extreme
Oct12Extreme
Nov14Extreme
Dec13Extreme
Location & terrain

Where is Posto da Mata?

Posto da Mata sits at 17.9°S, 39.9°W, 78 m above sea level, in Brazil. The nearest listed city is Pedro Canário, 35 km away.

Topography around Posto da Mata

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

Within 3 km, the terrain around Posto da Mata has only modest variations in elevation — a maximum elevation change of 55 m around an average of 86 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 140 m; within 80 km, large variations in elevation — a maximum elevation change of 746 m.

The land around Posto da Mata is covered by trees (47%) and grassland (36%) within 3 km, trees (69%) and grassland (28%) within 16 km, and grassland (48%) and trees (34%) within 80 km.

3 km
55 m
16 km
140 m
80 km
746 m
treesgrasslandcroplandartificial surfaceswatermangroves
December weather nearby: Pedro Canário 35 km · Mucuri 39 km · Teixeira de Freitas 41 km · Nova Viçosa 52 km · Nanuque 53 km · Montanha 60 km · Pinheiros 66 km · Medeiros Neto 69 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 Posto da Mata (-17.8861°, -39.8589°, elevation 78 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).