Valparaíso weather in December

In December, Valparaíso sees average daytime highs of 31°C and overnight lows near 22°C, with 193 mm of rain across 20.8 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 31°C through the month. The sky is clear or mostly clear about 19% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 13 h 12 min at the start of December to 13 h 18 min by month's end. Set against the rest of the year, December is Valparaíso's 11th-clearest and 8th-windiest month. For the whole year in context, see Valparaíso's year-round climate.

Daytime high
31°
4th warmest
Overnight low
22°
10th coldest
Rainfall
193 mm
20.8 wet days
Daylight
13 h 18 min
6:41 AM – 7:58 PM
Cloud cover
70%
11th clearest
Wind
8 km/h
8th windiest
Solar energy
6.01 kWh/m²
Travel score
3.3
out of 10

Valparaíso is settlement in Valparaíso, São Paulo, 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 31°C through the month.

A typical December day in Valparaíso reaches about 31°C in the afternoon and slips back to 22°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 on par with November and on par with January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13122
23122
33122
43122
53122
63122
73122
83122
93122
103122
113122
123122
133122
143122
153122
163122
173122
183122
193122
203122
213122
223122
233122
243122
253122
263122
273122
283122
293122
303122
313122

How December really feels in Valparaíso

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.

Valparaíso 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
Jan31° / 22°26122.513.13.3
Feb31° / 22°19019.512.73.4
Mar31° / 22°15518.712.23.9
Apr30° / 20°65811.55.5
May27° / 17°506.2117.2
Jun27° / 16°313.610.77.8
Jul27° / 16°192.510.87.9
Aug30° / 17°22311.36.4
Sep31° / 19°647.411.94.9
Oct32° / 21°11012.412.54.0
Nov31° / 21°15515.5133.7
Dec31° / 22°19320.813.33.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% 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 66%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23466
33367
43268
53268
63268
73268
83268
93268
103367
113268
123466
133565
143565
153664
163664
173763
183763
193862
203862
213862
223862
233763
243664
253664
263565
273565
283367
293169
303169
313070

Chance of precipitation in December

Any precipitation

Valparaíso gets around 193 mm of rain over 20.8 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 67% 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 (%)
161
262
363
465
565
666
767
867
967
1067
1167
1267
1367
1467
1567
1667
1766
1866
1966
2067
2167
2267
2368
2468
2569
2669
2770
2871
2971
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 60% of days. Sticky, muggy-or-worse air turns up on roughly 90% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
114153248
214143150
314133052
413123054
513112956
613102957
713102957
812102859
91292860
101292959
111292959
120292960
130193060
140193060
150183160
160183160
170183259
180173260
190173359
200173359
210073360
220063262
230063262
240053164
250053164
260053065
270042967
280042868
290042769
300042670
310042571

Wind in December

Winds average 8 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 12 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 6 minutes over December. Sunrise moves from 6:37 AM to 6:48 AM, and sunset from 7:49 PM to 8:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.26:377:49
213.26:377:50
313.26:387:50
413.26:387:51
513.26:387:52
613.26:387:52
713.26:387:53
813.36:397:54
913.36:397:54
1013.36:397:55
1113.36:397:55
1213.36:407:56
1313.36:407:57
1413.36:407:57
1513.36:417:58
1613.36:417:58
1713.36:417:59
1813.36:427:59
1913.36:428:00
2013.36:438:00
2113.36:438:01
2213.36:448:01
2313.36:448:02
2413.36:458:02
2513.36:458:03
2613.36:468:03
2713.36:468:03
2813.36:478:04
2913.36:478:04
3013.36:488:05
3113.36:488:05

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.01 kWh/m².

For context, solar energy here swings from a low near 3.8 kWh/m² to a high of 6.17 kWh/m² in November across the year — December's 6.01 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.0Intense
46.0Intense
56.0Intense
66.0Bright
76.0Bright
86.0Bright
96.0Bright
106.0Bright
116.0Bright
126.0Bright
136.0Bright
146.0Bright
156.0Intense
166.0Intense
176.0Intense
186.0Intense
196.0Intense
206.0Intense
216.0Intense
226.0Intense
236.0Intense
246.0Intense
256.0Intense
266.0Intense
276.0Bright
286.0Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in December

Hazard calendar for Valparaíso

In seasonPeak

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

Valparaíso'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 Valparaíso?

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

3.3
Sightseeing
11th-best month of the year
5.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Valparaíso.

What to pack for Valparaíso in December

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

In December, Valparaíso sees daytime highs around 31°C and nights near 22°C. Pack light clothes, rain gear and sun protection. About 21 days see rain.

light clothesrain gearsun protection

UV index in Valparaíso 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 Valparaíso peaks around January 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 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 22UV 15Jul 10UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May8Very high
Jun7High
Jul6High
Aug8Very high
Sep8Very high
Oct10Extreme
Nov12Extreme
Dec13Extreme

Air quality in Valparaíso 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 Valparaíso is worst in September — around 20 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (November, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1719 µg/m³Nov 236 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar7Good
Apr7Good
May8Good
Jun7Good
Jul7Good
Aug11Good
Sep20Moderate
Oct13Moderate
Nov6Good
Dec7Good
Location & terrain

Where is Valparaíso?

Valparaíso sits at 21.2°S, 50.9°W, 443 m above sea level, in Brazil. The nearest listed city is Guararapes, 24 km away.

Topography around Valparaíso

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

Within 3 km, the terrain around Valparaíso has only modest variations in elevation — a maximum elevation change of 97 m around an average of 427 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 154 m; within 80 km, significant variations in elevation — a maximum elevation change of 269 m.

The land around Valparaíso is covered by cropland (38%) and grassland (37%) within 3 km, cropland (60%) and grassland (26%) within 16 km, and cropland (51%) and grassland (34%) within 80 km.

3 km
97 m
16 km
154 m
80 km
269 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Guararapes 24 km · Mirandópolis 26 km · Araçatuba 45 km · Adamantina 55 km · Birigui 55 km · Lucélia 57 km · Osvaldo Cruz 63 km · Andradina 65 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 Valparaíso (-21.2278°, -50.8683°, elevation 443 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).