São Cristóvão weather in December

In December, São Cristóvão sees average daytime highs of 28°C and overnight lows near 24°C, with 33 mm of rain across 10.1 wet days and about 12.6 hours of daylight. It is the 4th-warmest and 12th-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 48% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 36 min at the start of December to 12 h 36 min by month's end. Set against the rest of the year, December is São Cristóvão's 7th-clearest and 3rd-windiest month. For the whole year in context, see São Cristóvão's year-round climate.

Daytime high
28°
4th warmest
Overnight low
24°
8th coldest
Rainfall
33 mm
10.1 wet days
Daylight
12 h 36 min
5:06 AM – 5:44 PM
Cloud cover
49%
7th clearest
Wind
17 km/h
3rd windiest
Solar energy
6.46 kWh/m²
Travel score
5.9
out of 10

São Cristóvão 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 28°C through the month.

A typical December day in São Cristóvão reaches about 28°C in the afternoon and slips back to 24°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, December runs on par with November and on par with January.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12824
22824
32824
42824
52824
62824
72824
82824
92824
102824
112824
122824
132824
142824
152824
162824
172824
182824
192824
202824
212824
222824
232824
242824
252824
262824
272824
282824
292824
302824
312824

How December really feels in São Cristóvão

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.

São Cristóvão weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 24°5615.212.65.2
Feb29° / 25°6316.412.44.8
Mar29° / 25°7118.112.14.7
Apr28° / 25°11220.311.84.6
May27° / 24°15722.911.54.8
Jun26° / 23°1482411.44.7
Jul25° / 22°12523.911.44.9
Aug25° / 22°9822.111.65.2
Sep26° / 22°6417.211.95.8
Oct27° / 23°5213.912.26.2
Nov28° / 24°4111.112.56.3
Dec28° / 24°3310.112.65.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% 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 37%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26337
36337
46436
56436
66436
76436
86436
96436
106436
116436
126337
136436
146436
156436
166436
176535
186436
196436
206436
216436
226337
236337
246238
256238
266337
276238
286238
296238
306238
316139

Chance of precipitation in December

Any precipitation

São Cristóvão gets around 33 mm of rain over 10.1 wet days in December, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 33% and peaks near 38% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
132
231
330
430
529
629
729
829
929
1030
1130
1231
1331
1432
1533
1633
1734
1834
1934
2035
2135
2235
2335
2435
2536
2636
2736
2836
2936
3037
3138

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 92% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)
1793
2793
3793
4793
5793
6793
7793
8793
9793
10793
11793
12793
13892
14892
15892
16892
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991
31991

Wind in December

Winds average 17 km/h in December.

Across December, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 36 min at the start of December to 12 h 36 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 5:01 AM to 5:13 AM, and sunset from 5:37 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:015:37
212.65:015:37
312.65:015:38
412.65:015:38
512.65:025:39
612.65:025:39
712.65:025:40
812.65:035:40
912.65:035:41
1012.65:035:41
1112.65:045:42
1212.65:045:42
1312.65:055:43
1412.65:055:43
1512.65:055:44
1612.65:065:44
1712.65:065:45
1812.65:075:45
1912.65:075:46
2012.65:085:46
2112.65:085:47
2212.65:085:47
2312.65:095:48
2412.65:095:48
2512.65:105:49
2612.65:105:49
2712.65:115:49
2812.65:115:50
2912.65:125:50
3012.65:125:51
3112.65:135:51

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.46 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4 kWh/m² to a high of 6.46 kWh/m² in December across the year — December's 6.46 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.4Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.5Intense
96.5Intense
106.5Intense
116.5Intense
126.5Intense
136.5Intense
146.5Intense
156.5Intense
166.4Intense
176.4Intense
186.4Intense
196.4Intense
206.4Intense
216.4Intense
226.4Intense
236.4Intense
246.4Intense
256.4Intense
266.4Intense
276.4Intense
286.4Intense
296.4Intense
306.4Intense
316.4Intense
Planning a trip in December

Hazard calendar for São Cristóvão

In seasonPeak

None of São Cristóvão'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 Cristóvão's rainy season runs March–August, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit São Cristóvão?

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

5.9
Sightseeing
3rd-best month of the year
7.0
Beach & pool
1st-best month of the year

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

What to pack for São Cristóvão in December

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

In December, São Cristóvão sees daytime highs around 28°C and nights near 24°C. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.

light clothessun protectionrain gear

Sea temperature near São Cristóvão in December

The nearest coast averages about 27°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 15 km away) is warmest in April at about 28°C and coldest in August near 26°C.

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

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb28Warm
Mar28Tropical
Apr28Tropical
May28Warm
Jun27Warm
Jul26Warm
Aug26Warm
Sep26Warm
Oct26Warm
Nov26Warm
Dec27Warm

UV index in São Cristóvão in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 12 (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 Cristóvão peaks around February 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 16UV 15Jul 10UV 9
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar14Extreme
Apr13Extreme
May10Very high
Jun9Very high
Jul9Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov13Extreme
Dec12Extreme
Location & terrain

Where is São Cristóvão?

São Cristóvão sits at 11.0°S, 37.2°W, 38 m above sea level, in Brazil. The nearest listed city is Itaporanga d'Ajuda, 12 km away.

Topography around São Cristóvão

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

Within 3 km, the terrain around São Cristóvão has only modest variations in elevation — a maximum elevation change of 89 m around an average of 26 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 146 m; within 80 km, large variations in elevation — a maximum elevation change of 694 m.

The land around São Cristóvão is covered by trees (43%) and grassland (32%) within 3 km, trees (36%) and grassland (33%) within 16 km, and grassland (44%) and water (29%) within 80 km.

3 km
89 m
16 km
146 m
80 km
694 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
December weather nearby: Itaporanga d'Ajuda 12 km · Aracaju 19 km · Nossa Senhora do Socorro 20 km · Barra dos Coqueiros 22 km · Laranjeiras 24 km · Salgado 29 km · Areia Branca 31 km · Maruim 34 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 Cristóvão (-11.0147°, -37.2064°, elevation 38 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).