Valença weather in December

In December, Valença sees average daytime highs of 28°C and overnight lows near 19°C, with 298 mm of rain across 23.1 wet days and about 13.3 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 9% 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 18 min by month's end. Set against the rest of the year, December is Valença's 11th-clearest and 5th-windiest month. For the whole year in context, see Valença's year-round climate.

Daytime high
28°
4th warmest
Overnight low
19°
10th coldest
Rainfall
298 mm
23.1 wet days
Daylight
13 h 24 min
6:10 AM – 7:32 PM
Cloud cover
78%
11th clearest
Wind
7 km/h
5th windiest
Solar energy
5.4 kWh/m²
Travel score
4.2
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical December day in Valença reaches about 28°C in the afternoon and slips back to 19°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 31°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)
12719
22719
32719
42719
52719
62719
72719
82719
92819
102819
112819
122819
132819
142819
152819
162819
172820
182820
192820
202820
212820
222820
232820
242820
252820
262820
272820
282820
292820
302820
312820

Valença 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
Jan29° / 20°30222.413.23.9
Feb29° / 20°21917.812.84.1
Mar28° / 19°22020.912.24.5
Apr27° / 18°9513.211.56.0
May24° / 15°549.110.97.1
Jun24° / 14°265.410.77.8
Jul24° / 14°265.210.87.9
Aug25° / 14°306.211.27.7
Sep26° / 16°7610.711.96.6
Oct26° / 17°13715.612.55.6
Nov27° / 18°24320.413.14.7
Dec28° / 19°29823.113.34.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% 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 79%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11882
21882
31882
41882
51684
61684
71783
81783
91783
101981
112080
122080
132179
142278
152278
162377
172476
182476
192575
202575
212575
222674
232773
242674
252575
262476
272476
282377
292377
302278
312278

Chance of precipitation in December

Any precipitation

Valença gets around 298 mm of rain over 23.1 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 74% and peaks near 79% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
170
270
370
470
571
671
771
871
972
1072
1172
1273
1373
1473
1574
1674
1775
1875
1975
2076
2176
2277
2377
2478
2578
2678
2779
2879
2979
3079
3178

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 70% of days. Sticky, muggy-or-worse air turns up on roughly 75% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1733573
2732583
3631603
4630604
5629614
6528634
7527644
8527644
9426664
10425674
11324694
12323704
13323704
14222724
15221734
16221734
17220744
18120745
19119755
20119755
21119755
22118765
23118765
24117766
25117766
26117766
27116767
28116767
29116758
30116758
31016768

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 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
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 18 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 6:07 AM to 6:18 AM, and sunset from 7:22 PM to 7:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.36:077:22
213.36:077:23
313.36:077:24
413.36:077:24
513.36:077:25
613.36:077:26
713.36:087:26
813.36:087:27
913.36:087:28
1013.36:087:28
1113.36:097:29
1213.36:097:29
1313.36:097:30
1413.36:107:30
1513.46:107:31
1613.46:107:32
1713.46:117:32
1813.46:117:33
1913.46:127:33
2013.46:127:34
2113.46:127:34
2213.46:137:35
2313.46:137:35
2413.46:147:36
2513.46:147:36
2613.46:157:36
2713.46:157:37
2813.46:167:37
2913.46:177:38
3013.36:177:38
3113.36:187:38

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.4 kWh/m².

For context, solar energy here swings from a low near 3.41 kWh/m² to a high of 5.77 kWh/m² in February across the year — December's 5.4 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.4Bright
175.4Bright
185.4Bright
195.4Bright
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 Valença

In seasonPeak

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

Valença's monsoon runs October–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 Valença?

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

4.2
Sightseeing
10th-best month of the year
4.6
Beach & pool
12th-best month of the year

December is a reasonable time to visit Valença for sightseeing.

What to pack for Valença in December

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

In December, Valença sees daytime highs around 28°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

UV index in Valença 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 Valença 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 Valença 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 Valença 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 Valença?

Valença sits at 22.2°S, 43.7°W, 560 m above sea level, in Brazil. The nearest listed city is Vassouras, 18 km away.

Topography around Valença

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

Within 3 km, the terrain around Valença has significant variations in elevation — a maximum elevation change of 523 m around an average of 617 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 770 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,224 m.

The land around Valença is covered by grassland (60%) and trees (25%) within 3 km, grassland (64%) and trees (35%) within 16 km, and trees (48%) and grassland (46%) within 80 km.

3 km
523 m
16 km
770 m
80 km
2,224 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Vassouras 18 km · Barra do Piraí 28 km · Mendes 31 km · Miguel Pereira 33 km · Paty do Alferes 35 km · Paracambi 40 km · Pinheiral 43 km · Paraíba do Sul 43 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 Valença (-22.2456°, -43.7003°, elevation 560 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).