São José de Ribamar weather in December

In December, São José de Ribamar sees average daytime highs of 29°C and overnight lows near 26°C, with 75 mm of rain across 15.1 wet days and about 12.1 hours of daylight. It is the 5th-warmest and 8th-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 32% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of December to 12 h 06 min by month's end. Set against the rest of the year, December is São José de Ribamar's 7th-clearest and 4th-windiest month. For the whole year in context, see São José de Ribamar's year-round climate.

Daytime high
29°
5th warmest
Overnight low
26°
10th coldest
Rainfall
75 mm
15.1 wet days
Daylight
12 h 06 min
5:48 AM – 5:57 PM
Cloud cover
58%
7th clearest
Wind
20 km/h
4th windiest
Solar energy
5.86 kWh/m²
Travel score
4.8
out of 10

São José de Ribamar 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 São José de Ribamar reaches about 29°C in the afternoon and slips back to 26°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 30°C. Set against its neighbours, December runs on par with November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12926
22926
32926
42926
52926
62926
72926
82926
92926
102926
112926
122926
132926
142926
152926
162926
172926
182926
192926
202926
212926
222926
232926
242926
252926
262926
272926
282926
292926
302926
312926

How December really feels in São José de Ribamar

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.

São José de Ribamar weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 25°22925.412.13.6
Feb28° / 25°31725.912.13.3
Mar28° / 25°45230.2123.2
Apr28° / 25°43728.711.93.1
May29° / 25°29226.511.93.5
Jun29° / 25°14621.811.94.1
Jul29° / 25°9418.411.94.7
Aug30° / 26°257.511.95.9
Sep30° / 26°112.8126.4
Oct29° / 26°153.712.16.3
Nov29° / 26°286.312.15.8
Dec29° / 26°7515.112.14.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 19% of December, with mostly cloudy or overcast conditions the remaining 49%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26040
36040
45941
55941
65941
75743
85743
95644
105644
115545
125545
135446
145347
155248
165149
175050
184951
194753
204753
214654
224654
234654
244555
254456
264357
274357
284258
294258
304159
314159

Chance of precipitation in December

Any precipitation

São José de Ribamar gets around 75 mm of rain over 15.1 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 49% and peaks near 69% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
128
229
330
430
531
633
734
835
937
1038
1140
1242
1343
1445
1547
1650
1752
1854
1955
2057
2159
2260
2361
2462
2563
2664
2765
2866
2967
3068
3169

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 83% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
18911
28911
38911
48812
58812
68812
78812
88713
98713
108713
118614
128515
138515
148416
158317
168317
178218
188119
198119
208020
217921
227921
237822
247822
257822
267822
277822
287822
297822
307822
317822

Wind in December

Winds average 20 km/h in December.

Across December, daily wind ranges from about 18 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
1020breezy
1120breezy
1220breezy
1320breezy
1420light breeze
1520light breeze
1620light breeze
1720light breeze
1820light breeze
1920light breeze
2020light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2818light breeze
2918light breeze
3018light breeze
3118light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 06 min at the start of December to 12 h 06 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 5:42 AM to 5:55 AM, and sunset from 5:50 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.15:425:50
212.15:425:51
312.15:435:51
412.15:435:51
512.15:435:52
612.15:445:52
712.15:445:53
812.15:455:53
912.15:455:54
1012.15:455:54
1112.15:465:54
1212.15:465:55
1312.15:475:55
1412.15:475:56
1512.15:485:56
1612.15:485:57
1712.15:485:57
1812.15:495:58
1912.15:495:58
2012.15:505:59
2112.15:505:59
2212.15:516:00
2312.15:516:00
2412.15:526:01
2512.15:526:01
2612.15:536:02
2712.15:536:02
2812.15:546:02
2912.15:546:03
3012.15:556:03
3112.15:556:04

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.86 kWh/m².

For context, solar energy here swings from a low near 4.68 kWh/m² to a high of 6.5 kWh/m² in October across the year — December's 5.86 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.1Intense
46.1Intense
56.0Intense
66.0Intense
76.0Intense
86.0Intense
96.0Bright
106.0Bright
116.0Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
315.6Bright
Planning a trip in December

Hazard calendar for São José de Ribamar

In seasonPeak

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

São José de Ribamar'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 São José de Ribamar?

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

4.8
Sightseeing
5th-best month of the year
6.2
Beach & pool
5th-best month of the year

December is a reasonable time to visit São José de Ribamar for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for São José de Ribamar in December

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

In December, São José de Ribamar sees daytime highs around 29°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

Sea temperature near São José de Ribamar 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 21 km away) is warmest in May at about 29°C and coldest in October 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
Mar28Tropical
Apr29Tropical
May29Tropical
Jun29Tropical
Jul28Tropical
Aug28Warm
Sep28Warm
Oct27Warm
Nov28Warm
Dec28Warm

UV index in São José de Ribamar 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 São José de Ribamar peaks around March 17 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 17 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 16Jul 17UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar16Extreme
Apr14Extreme
May12Extreme
Jun10Extreme
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in São José de Ribamar 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 São José de Ribamar is worst in February — around 18 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (July, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodFeb 2018 µg/m³Jul 157 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb18Moderate
Mar18Moderate
Apr13Moderate
May8Good
Jun7Good
Jul7Good
Aug8Good
Sep9Good
Oct10Good
Nov10Good
Dec11Good
Location & terrain

Where is São José de Ribamar?

São José de Ribamar sits at 2.6°S, 44.1°W, 6 m above sea level, in Brazil. The nearest listed city is Paço do Lumiar, 6.0 km away.

Topography around São José de Ribamar

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São José de Ribamar.

Within 3 km, the terrain around São José de Ribamar has only modest variations in elevation — a maximum elevation change of 54 m around an average of 12 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 66 m; within 80 km, only modest variations in elevation — a maximum elevation change of 115 m.

The land around São José de Ribamar is covered by water (43%) and trees (26%) within 3 km, water (49%) and trees (24%) within 16 km, and water (40%) and trees (32%) within 80 km.

3 km
54 m
16 km
66 m
80 km
115 m
treesshrubsgrasslandartificial surfaceswaterwetlandmangroves
December weather nearby: Paço do Lumiar 6.0 km · Raposa 16 km · Icatu 24 km · São Luís 27 km · Morros 34 km · Alcântara 43 km · Rosário 48 km · Bacabeira 54 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 São José de Ribamar (-2.5557°, -44.0599°, elevation 6 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).