Mendes weather in December

In December, Mendes sees average daytime highs of 29°C and overnight lows near 20°C, with 249 mm of rain across 22.2 wet days and about 13.4 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 11% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 18 min at the start of December to 13 h 24 min by month's end. Set against the rest of the year, December is Mendes's 11th-clearest and 5th-windiest month. For the whole year in context, see Mendes's year-round climate.

Daytime high
29°
4th warmest
Overnight low
20°
10th coldest
Rainfall
249 mm
22.2 wet days
Daylight
13 h 24 min
6:10 AM – 7:32 PM
Cloud cover
76%
11th clearest
Wind
7 km/h
5th windiest
Solar energy
5.45 kWh/m²
Travel score
4.1
out of 10

Mendes is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical December day in Mendes reaches about 29°C in the afternoon and slips back to 20°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 32°C. Set against its neighbours, December runs about 1°C warmer than November and about 1°C cooler than January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12820
22820
32820
42820
52820
62820
72820
82820
92820
102820
112820
122820
132820
142820
152920
162921
172921
182921
192921
202921
212921
222921
232921
242921
252921
262921
272921
282921
292921
302921
312921

How December really feels in Mendes

Once humidity and wind are folded in, December averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Mendes weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 21°2822213.23.7
Feb30° / 21°20017.612.83.9
Mar29° / 20°19520.312.24.2
Apr27° / 19°8912.511.56.0
May25° / 16°539.310.97.0
Jun25° / 15°285.510.67.8
Jul24° / 15°295.310.87.9
Aug25° / 15°275.511.27.7
Sep26° / 17°661011.96.6
Oct27° / 18°11214.112.55.7
Nov27° / 19°20219.313.14.8
Dec29° / 20°24922.213.44.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 76%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12080
22080
32080
42080
52080
62080
72080
82179
92179
102080
112179
122278
132476
142476
152674
162674
172674
182872
192872
202872
212872
222971
232971
242971
252872
262773
272773
282674
292674
302674
312674

Chance of precipitation in December

Any precipitation

Mendes gets around 249 mm of rain over 22.2 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 71% and peaks near 77% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
166
266
366
466
567
667
767
867
968
1068
1169
1269
1369
1470
1570
1671
1771
1872
1972
2073
2174
2274
2375
2475
2576
2676
2777
2877
2977
3077
3176

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the muggy band about 62% of days. Sticky, muggy-or-worse air turns up on roughly 87% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
12245915
22235916
32225917
42215918
52206018
61196119
71186120
81176121
91176121
101166122
111156222
121146322
131136323
141136323
151126324
160116524
170116524
180106525
190106426
20096526
21096427
22086428
23086329
24076330
25076231
26076132
27076033
28075934
29075934
30075835
31075835

Wind in December

Winds average 7 km/h in December.

Across December, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 18 min at the start of December to 13 h 24 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 6:06 AM to 6:17 AM, and sunset from 7:23 PM to 7:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.36:067:23
213.36:067:24
313.36:067:24
413.36:077:25
513.36:077:26
613.36:077:26
713.36:077:27
813.36:077:28
913.36:087:28
1013.36:087:29
1113.46:087:29
1213.46:097:30
1313.46:097:31
1413.46:097:31
1513.46:107:32
1613.46:107:32
1713.46:107:33
1813.46:117:33
1913.46:117:34
2013.46:127:34
2113.46:127:35
2213.46:127:35
2313.46:137:36
2413.46:137:36
2513.46:147:37
2613.46:147:37
2713.46:157:38
2813.46:167:38
2913.46:167:38
3013.46:177:39
3113.46:177:39

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.45 kWh/m².

For context, solar energy here swings from a low near 3.36 kWh/m² to a high of 5.8 kWh/m² in February across the year — December's 5.45 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.4Bright
145.4Bright
155.4Bright
165.4Bright
175.4Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in December

Hazard calendar for Mendes

In seasonPeak

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

Mendes's monsoon runs November–March, 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 Mendes?

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
4.9
Beach & pool
12th-best month of the year

December is a reasonable time to visit Mendes for sightseeing.

What to pack for Mendes in December

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

In December, Mendes sees daytime highs around 29°C and nights near 20°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

Sea temperature near Mendes in December

The nearest coast averages about 24°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 67 km away) is warmest in February at about 26°C and coldest in August near 21°C.

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

20°22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar26Warm
Apr25Warm
May24Refreshing
Jun23Refreshing
Jul22Refreshing
Aug21Refreshing
Sep21Refreshing
Oct22Refreshing
Nov23Refreshing
Dec24Warm

UV index in Mendes 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 Mendes peaks around January 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 20UV 15Jul 12UV 6
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep7High
Oct12Extreme
Nov14Extreme
Dec14Extreme

Air quality in Mendes 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 Mendes is worst in July — around 38 µg/m³ PM2.5 (poor), about 2.0× the cleanest month (December, 19 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateModerateJul 1237 µg/m³Dec 2319 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb19Moderate
Mar21Moderate
Apr24Moderate
May31Moderate
Jun36Poor
Jul38Poor
Aug32Moderate
Sep37Poor
Oct24Moderate
Nov20Moderate
Dec19Moderate
Location & terrain

Where is Mendes?

Mendes sits at 22.5°S, 43.7°W, 419 m above sea level, in Brazil. The nearest listed city is Paracambi, 9.0 km away.

Topography around Mendes

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

Within 3 km, the terrain around Mendes has significant variations in elevation — a maximum elevation change of 321 m around an average of 492 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 829 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,224 m.

The land around Mendes is covered by trees (63%) and grassland (32%) within 3 km, trees (54%) and grassland (43%) within 16 km, and trees (44%) and grassland (35%) within 80 km.

3 km
321 m
16 km
829 m
80 km
2,224 m
treesgrasslandartificial surfaceswatermangroves
December weather nearby: Paracambi 9.0 km · Barra do Piraí 11 km · Japeri 15 km · Vassouras 15 km · Piraí 20 km · Seropédica 24 km · Universidade Rural 27 km · Pinheiral 28 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 Mendes (-22.5267°, -43.7328°, elevation 419 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. 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).