Parnaíba weather in December

In December, Parnaíba sees average daytime highs of 33°C and overnight lows near 25°C, with 35 mm of rain across 7.2 wet days and about 12.2 hours of daylight. It is the 5th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 34% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of December to 12 h 12 min by month's end. Set against the rest of the year, December is Parnaíba's 7th-clearest and 4th-windiest month. For the whole year in context, see Parnaíba's year-round climate.

Daytime high
33°
5th warmest
Overnight low
25°
12th coldest
Rainfall
35 mm
7.2 wet days
Daylight
12 h 12 min
5:38 AM – 5:48 PM
Cloud cover
55%
7th clearest
Wind
19 km/h
4th windiest
Solar energy
6.15 kWh/m²
Travel score
3.5
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical December day in Parnaíba reaches about 33°C in the afternoon and slips back to 25°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 35°C. Set against its neighbours, December runs about 1°C cooler than November and about 2°C warmer than January.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13425
23425
33425
43425
53425
63425
73425
83425
93425
103425
113425
123425
133425
143425
153425
163425
173325
183325
193325
203325
213325
223325
233325
243325
253325
263325
273325
283325
293325
303325
313325

How December really feels in Parnaíba

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.

Parnaíba weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 25°1292012.13.1
Feb31° / 25°1702312.12.9
Mar30° / 25°26527.7122.8
Apr30° / 25°26825.911.92.9
May31° / 25°1481811.93.6
Jun32° / 25°317.111.84.4
Jul33° / 24°162.711.84.3
Aug34° / 24°30.511.93.8
Sep35° / 25°10.2123.5
Oct35° / 25°60.712.13.4
Nov34° / 25°71.712.13.5
Dec33° / 25°357.212.23.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 22% of December, with mostly cloudy or overcast conditions the remaining 43%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26337
36337
46337
56337
66337
76337
86337
96238
106238
116139
126139
136139
146040
155941
165941
175842
185743
195644
205545
215446
225446
235347
245149
255149
265050
274951
284951
294753
304654
314654

Chance of precipitation in December

Any precipitation

Parnaíba gets around 35 mm of rain over 7.2 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 24% and peaks near 45% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
19
210
310
411
511
612
713
814
915
1016
1117
1218
1319
1420
1521
1623
1724
1825
1927
2028
2129
2231
2332
2433
2535
2637
2738
2840
2942
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 90% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
116831
215841
315841
414851
514851
613861
712871
811881
910891
1010891
119901
128911
138911
147921
157921
167912
176922
186922
196922
206922
216922
226922
236922
246922
256913
266913
275914
285914
295914
305905
314915

Wind in December

Winds average 19 km/h in December.

Across December, daily wind ranges from about 17 km/h on the calmest days to 21 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
121breezy
221breezy
321breezy
420breezy
520breezy
620breezy
720breezy
820breezy
920breezy
1020light breeze
1120light breeze
1220light breeze
1320light breeze
1420light breeze
1520light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze
3117light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 12 min at the start of December to 12 h 12 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 5:32 AM to 5:45 AM, and sunset from 5:42 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.25:325:42
212.25:335:42
312.25:335:42
412.25:335:43
512.25:345:43
612.25:345:44
712.25:345:44
812.25:355:45
912.25:355:45
1012.25:365:45
1112.25:365:46
1212.25:365:46
1312.25:375:47
1412.25:375:47
1512.25:385:48
1612.25:385:48
1712.25:395:49
1812.25:395:49
1912.25:405:50
2012.25:405:50
2112.25:415:51
2212.25:415:51
2312.25:425:52
2412.25:425:52
2512.25:425:53
2612.25:435:53
2712.25:435:53
2812.25:445:54
2912.25:445:54
3012.25:455:55
3112.25:455:55

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.15 kWh/m².

For context, solar energy here swings from a low near 4.93 kWh/m² to a high of 6.98 kWh/m² in October across the year — December's 6.15 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.4Intense
46.4Intense
56.4Intense
66.4Intense
76.4Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.2Intense
136.2Intense
146.2Intense
156.2Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.0Intense
216.0Intense
226.0Bright
236.0Bright
246.0Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in December

Hazard calendar for Parnaíba

In seasonPeak

None of Parnaíba's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Parnaíba's monsoon runs January–May, 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 Parnaíba?

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

3.5
Sightseeing
5th-best month of the year
6.5
Beach & pool
7th-best month of the year

December is a weaker month for outdoor sightseeing in Parnaíba. The water and warmth also suit a beach or pool day.

What to pack for Parnaíba in December

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

In December, Parnaíba sees daytime highs around 33°C and nights near 25°C. Pack light clothes and sun protection. About 7 days see rain.

light clothessun protection

Sea temperature near Parnaíba in December

The nearest coast averages about 28°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 17 km away) is warmest in May at about 29°C and coldest in September near 27°C.

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

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb28Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun29Tropical
Jul28Warm
Aug27Warm
Sep27Warm
Oct27Warm
Nov28Warm
Dec28Tropical

UV index in Parnaíba 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 Parnaíba peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 17UV 15Jun 23UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun10Extreme
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Parnaíba 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 Parnaíba is worst in December — around 18 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (August, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateDec 1217 µg/m³Aug 216 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb15Moderate
Mar13Moderate
Apr11Good
May8Good
Jun7Good
Jul9Good
Aug6Good
Sep7Good
Oct10Good
Nov16Moderate
Dec18Moderate
Location & terrain

Where is Parnaíba?

Parnaíba sits at 2.9°S, 41.8°W, 9 m above sea level, in Brazil. The nearest listed city is Ilha Grande, 7.0 km away.

Topography around Parnaíba

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

Within 3 km, the terrain around Parnaíba has only modest variations in elevation — a maximum elevation change of 28 m around an average of 7 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 52 m; within 80 km, large variations in elevation — a maximum elevation change of 919 m.

The land around Parnaíba is covered by grassland (46%) and artificial surfaces (31%) within 3 km, grassland (37%) and trees (29%) within 16 km, and trees (39%) and water (33%) within 80 km.

3 km
28 m
16 km
52 m
80 km
919 m
treesshrubsgrasslandartificial surfacesbare terrainwaterwetlandmangroves
December weather nearby: Ilha Grande 7.0 km · Luís Correia 13 km · Araioses 14 km · Buriti dos Lopes 32 km · Tutóia 58 km · Cocal 68 km · Paulino Neves 87 km · São Bernardo 87 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 Parnaíba (-2.9047°, -41.7767°, elevation 9 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).