Castro Alves weather in December

In December, Castro Alves sees average daytime highs of 31°C and overnight lows near 22°C, with 56 mm of rain across 9.4 wet days and about 12.7 hours of daylight. It is the 4th-warmest and 3rd-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 23% of the time in December, and the air most often feels muggy.

Daylight stretches from about 12 h 42 min at the start of December to 12 h 42 min by month's end. Set against the rest of the year, December is Castro Alves's 11th-clearest and 12th-windiest month. For the whole year in context, see Castro Alves's year-round climate.

Daytime high: 31°; 4th warmest
Overnight low: 22°; 8th coldest
Rainfall: 56 mm; 9.4 wet days
Daylight: 12 h 42 min; 5:11 AM – 5:56 PM
Cloud cover: 63%; 11th clearest
Wind: 9 km/h; 12th windiest
Solar energy: 5.86 kWh/m²
Travel score: 4.3; out of 10

Castro Alves is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← November Castro Alves year-round climate January →Best places to visit in December

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

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 Castro Alves reaches about 31°C in the afternoon and slips back to 22°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 34°C. Set against its neighbours, December runs on par with November and on par with January.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31
Avg low (°C)	21	21	21	21	21	21	21	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22

	Avg high (°C)	Avg low (°C)
1	31	21
2	31	21
3	31	21
4	31	21
5	31	21
6	31	21
7	31	21
8	31	22
9	31	22
10	31	22
11	31	22
12	31	22
13	31	22
14	31	22
15	31	22
16	31	22
17	31	22
18	31	22
19	31	22
20	31	22
21	31	22
22	31	22
23	31	22
24	31	22
25	31	22
26	31	22
27	31	22
28	31	22
29	31	22
30	31	22
31	31	22

How December really feels in Castro Alves

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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Castro Alves weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	31° / 22°	69	12.2	12.7	4.1
Feb	32° / 22°	47	11.5	12.4	4.0
Mar	31° / 22°	60	13.9	12.1	3.9
Apr	30° / 22°	49	14.9	11.7	4.4
May	28° / 21°	35	12	11.4	5.5
Jun	27° / 20°	34	12.9	11.3	6.1
Jul	26° / 19°	36	13.2	11.3	6.2
Aug	27° / 19°	33	13.7	11.6	6.0
Sep	28° / 19°	26	10.5	11.9	5.9
Oct	30° / 20°	34	10.6	12.3	5.1
Nov	31° / 21°	56	11.1	12.6	4.5
Dec	31° / 22°	56	9.4	12.7	4.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 23% of December, with mostly cloudy or overcast conditions the remaining 54%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	43	43	43	43	45	44	44	45	44	45	45	45	46	46	46	46	47	47	48	48	47	47	47	47	47	48	48	48	48	48	49
Cloudier (%)	57	57	57	57	55	56	56	55	56	55	55	55	54	54	54	54	53	53	52	52	53	53	53	53	53	52	52	52	52	52	51

	Clearer (%)	Cloudier (%)
1	43	57
2	43	57
3	43	57
4	43	57
5	45	55
6	44	56
7	44	56
8	45	55
9	44	56
10	45	55
11	45	55
12	45	55
13	46	54
14	46	54
15	46	54
16	46	54
17	47	53
18	47	53
19	48	52
20	48	52
21	47	53
22	47	53
23	47	53
24	47	53
25	47	53
26	48	52
27	48	52
28	48	52
29	48	52
30	48	52
31	49	51

Chance of precipitation in December

Any precipitation

Castro Alves gets around 56 mm of rain over 9.4 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 31% and peaks near 35% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	35	34	33	33	32	31	30	30	30	30	30	30	30	30	30	30	31	31	31	31	31	31	31	31	31	31	31	31	31	31	32

	Rain chance (%)
1	35
2	34
3	33
4	33
5	32
6	31
7	30
8	30
9	30
10	30
11	30
12	30
13	30
14	30
15	30
16	30
17	31
18	31
19	31
20	31
21	31
22	31
23	31
24	31
25	31
26	31
27	31
28	31
29	31
30	31
31	32

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 61% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Humid (%)	0	0	0	0	0	0	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	0	0	0	0	0	0
Muggy (%)	66	65	64	64	63	63	61	61	61	61	61	60	60	60	60	61	61	61	61	61	61	61	61	61	61	62	62	61	61	60	59
Oppressive (%)	34	35	36	36	37	37	38	38	38	38	38	39	39	39	39	38	38	38	38	38	38	38	38	38	38	38	38	39	39	40	41

	Humid (%)	Muggy (%)	Oppressive (%)
1	0	66	34
2	0	65	35
3	0	64	36
4	0	64	36
5	0	63	37
6	0	63	37
7	1	61	38
8	1	61	38
9	1	61	38
10	1	61	38
11	1	61	38
12	1	60	39
13	1	60	39
14	1	60	39
15	1	60	39
16	1	61	38
17	1	61	38
18	1	61	38
19	1	61	38
20	1	61	38
21	1	61	38
22	1	61	38
23	1	61	38
24	1	61	38
25	1	61	38
26	0	62	38
27	0	62	38
28	0	61	39
29	0	61	39
30	0	60	40
31	0	59	41

Wind in December

Winds average 9 km/h in December, the calmest month.

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

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	9	calm
2	9	calm
3	9	calm
4	9	calm
5	9	calm
6	9	calm
7	9	calm
8	9	calm
9	9	calm
10	9	calm
11	9	calm
12	9	calm
13	9	calm
14	9	calm
15	9	calm
16	9	calm
17	9	calm
18	9	calm
19	9	calm
20	9	calm
21	9	calm
22	9	calm
23	9	calm
24	9	calm
25	9	calm
26	9	calm
27	9	calm
28	9	calm
29	9	calm
30	9	calm
31	9	calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 42 min at the start of December to 12 h 42 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 5:07 AM to 5:19 AM, and sunset from 5:48 PM to 6:03 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	12.7	12.7	12.7	12.7	12.7	12.7	12.7	12.7	12.7	12.7	12.7	12.7	12.7	12.7	12.7	12.7	12.7	12.7	12.8	12.8	12.8	12.8	12.8	12.8	12.8	12.7	12.7	12.7	12.7	12.7	12.7
Sunrise (AM)	5:07	5:07	5:07	5:07	5:08	5:08	5:08	5:08	5:09	5:09	5:10	5:10	5:10	5:11	5:11	5:11	5:12	5:12	5:13	5:13	5:14	5:14	5:15	5:15	5:16	5:16	5:17	5:17	5:18	5:18	5:19
Sunset (PM)	5:48	5:49	5:49	5:50	5:51	5:51	5:52	5:52	5:53	5:53	5:54	5:54	5:55	5:55	5:56	5:56	5:57	5:57	5:58	5:58	5:59	5:59	6:00	6:00	6:01	6:01	6:01	6:02	6:02	6:03	6:03

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.7	5:07	5:48
2	12.7	5:07	5:49
3	12.7	5:07	5:49
4	12.7	5:07	5:50
5	12.7	5:08	5:51
6	12.7	5:08	5:51
7	12.7	5:08	5:52
8	12.7	5:08	5:52
9	12.7	5:09	5:53
10	12.7	5:09	5:53
11	12.7	5:10	5:54
12	12.7	5:10	5:54
13	12.7	5:10	5:55
14	12.7	5:11	5:55
15	12.7	5:11	5:56
16	12.7	5:11	5:56
17	12.7	5:12	5:57
18	12.7	5:12	5:57
19	12.8	5:13	5:58
20	12.8	5:13	5:58
21	12.8	5:14	5:59
22	12.8	5:14	5:59
23	12.8	5:15	6:00
24	12.8	5:15	6:00
25	12.8	5:16	6:01
26	12.7	5:16	6:01
27	12.7	5:17	6:01
28	12.7	5:17	6:02
29	12.7	5:18	6:02
30	12.7	5:18	6:03
31	12.7	5:19	6:03

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 3.41 kWh/m² to a high of 5.87 kWh/m² in January across the year — December's 5.86 kWh/m² sits near the top of that range.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	5.7	5.7	5.7	5.7	5.7	5.8	5.8	5.8	5.8	5.8	5.8	5.8	5.9	5.9	5.9	5.9	5.9	5.9	5.9	5.9	5.9	5.9	5.9	5.9	5.9	5.9	5.9	5.9	5.9	5.9	5.9
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.7	Bright
2	5.7	Bright
3	5.7	Bright
4	5.7	Bright
5	5.7	Bright
6	5.8	Bright
7	5.8	Bright
8	5.8	Bright
9	5.8	Bright
10	5.8	Bright
11	5.8	Bright
12	5.8	Bright
13	5.9	Bright
14	5.9	Bright
15	5.9	Bright
16	5.9	Bright
17	5.9	Bright
18	5.9	Bright
19	5.9	Bright
20	5.9	Bright
21	5.9	Bright
22	5.9	Bright
23	5.9	Bright
24	5.9	Bright
25	5.9	Bright
26	5.9	Bright
27	5.9	Bright
28	5.9	Bright
29	5.9	Bright
30	5.9	Bright
31	5.9	Bright

Planning a trip in December

Is December a good time to visit Castro Alves?

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

4.3

Sightseeing

9th-best month of the year

6.5

Beach & pool

3rd-best month of the year

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

What to pack for Castro Alves in December

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

In December, Castro Alves sees daytime highs around 31°C and nights near 22°C. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Castro Alves 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 Castro Alves peaks around February 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 9 (very high).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	14	15	14	12	9	9	9	10	11	13	13	12
Level	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	15	Extreme
Mar	14	Extreme
Apr	12	Extreme
May	9	Very high
Jun	9	Very high
Jul	9	Very high
Aug	10	Extreme
Sep	11	Extreme
Oct	13	Extreme
Nov	13	Extreme
Dec	12	Extreme

Location & terrain

Where is Castro Alves?

Castro Alves sits at 12.8°S, 39.4°W, 255 m above sea level, in Brazil. The nearest listed city is Sapeaçu, 27 km away.

Topography around Castro Alves

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

Within 3 km, the terrain around Castro Alves has only modest variations in elevation — a maximum elevation change of 134 m around an average of 248 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 689 m; within 80 km, large variations in elevation — a maximum elevation change of 931 m.

The land around Castro Alves is covered by grassland (87%) within 3 km, grassland (78%) within 16 km, and grassland (60%) and trees (30%) within 80 km.

3 km

134 m

grassland 87%

16 km

689 m

grassland 78%

80 km

931 m

grassland 60%

treesshrubsgrasslandcroplandartificial surfaceswatermangroves

← November Castro Alves year-round climate January →Best places to visit in December

December weather nearby: Sapeaçu 27 km · Conceição do Almeida 28 km · Santo Antônio de Jesus 29 km · Itatim 30 km · Amargosa 35 km · Cabaceiras do Paraguaçu 36 km · Cruz das Almas 37 km · São Felipe 38 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

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 Castro Alves (-12.7656°, -39.4283°, elevation 255 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	31	21
2	31	21
3	31	21
4	31	21
5	31	21
6	31	21
7	31	21
8	31	22
9	31	22
10	31	22
11	31	22
12	31	22
13	31	22
14	31	22
15	31	22
16	31	22
17	31	22
18	31	22
19	31	22
20	31	22
21	31	22
22	31	22
23	31	22
24	31	22
25	31	22
26	31	22
27	31	22
28	31	22
29	31	22
30	31	22
31	31	22

	Clearer (%)	Cloudier (%)
1	43	57
2	43	57
3	43	57
4	43	57
5	45	55
6	44	56
7	44	56
8	45	55
9	44	56
10	45	55
11	45	55
12	45	55
13	46	54
14	46	54
15	46	54
16	46	54
17	47	53
18	47	53
19	48	52
20	48	52
21	47	53
22	47	53
23	47	53
24	47	53
25	47	53
26	48	52
27	48	52
28	48	52
29	48	52
30	48	52
31	49	51

	Rain chance (%)
1	35
2	34
3	33
4	33
5	32
6	31
7	30
8	30
9	30
10	30
11	30
12	30
13	30
14	30
15	30
16	30
17	31
18	31
19	31
20	31
21	31
22	31
23	31
24	31
25	31
26	31
27	31
28	31
29	31
30	31
31	32

	Humid (%)	Muggy (%)	Oppressive (%)
1	0	66	34
2	0	65	35
3	0	64	36
4	0	64	36
5	0	63	37
6	0	63	37
7	1	61	38
8	1	61	38
9	1	61	38
10	1	61	38
11	1	61	38
12	1	60	39
13	1	60	39
14	1	60	39
15	1	60	39
16	1	61	38
17	1	61	38
18	1	61	38
19	1	61	38
20	1	61	38
21	1	61	38
22	1	61	38
23	1	61	38
24	1	61	38
25	1	61	38
26	0	62	38
27	0	62	38
28	0	61	39
29	0	61	39
30	0	60	40
31	0	59	41

	Avg high (°C)	Avg low (°C)
1	31	21
2	31	21
3	31	21
4	31	21
5	31	21
6	31	21
7	31	21
8	31	22
9	31	22
10	31	22
11	31	22
12	31	22
13	31	22
14	31	22
15	31	22
16	31	22
17	31	22
18	31	22
19	31	22
20	31	22
21	31	22
22	31	22
23	31	22
24	31	22
25	31	22
26	31	22
27	31	22
28	31	22
29	31	22
30	31	22
31	31	22

	Clearer (%)	Cloudier (%)
1	43	57
2	43	57
3	43	57
4	43	57
5	45	55
6	44	56
7	44	56
8	45	55
9	44	56
10	45	55
11	45	55
12	45	55
13	46	54
14	46	54
15	46	54
16	46	54
17	47	53
18	47	53
19	48	52
20	48	52
21	47	53
22	47	53
23	47	53
24	47	53
25	47	53
26	48	52
27	48	52
28	48	52
29	48	52
30	48	52
31	49	51

	Rain chance (%)
1	35
2	34
3	33
4	33
5	32
6	31
7	30
8	30
9	30
10	30
11	30
12	30
13	30
14	30
15	30
16	30
17	31
18	31
19	31
20	31
21	31
22	31
23	31
24	31
25	31
26	31
27	31
28	31
29	31
30	31
31	32

	Humid (%)	Muggy (%)	Oppressive (%)
1	0	66	34
2	0	65	35
3	0	64	36
4	0	64	36
5	0	63	37
6	0	63	37
7	1	61	38
8	1	61	38
9	1	61	38
10	1	61	38
11	1	61	38
12	1	60	39
13	1	60	39
14	1	60	39
15	1	60	39
16	1	61	38
17	1	61	38
18	1	61	38
19	1	61	38
20	1	61	38
21	1	61	38
22	1	61	38
23	1	61	38
24	1	61	38
25	1	61	38
26	0	62	38
27	0	62	38
28	0	61	39
29	0	61	39
30	0	60	40
31	0	59	41

	Avg high (°C)	Avg low (°C)
1	31	21
2	31	21
3	31	21
4	31	21
5	31	21
6	31	21
7	31	21
8	31	22
9	31	22
10	31	22
11	31	22
12	31	22
13	31	22
14	31	22
15	31	22
16	31	22
17	31	22
18	31	22
19	31	22
20	31	22
21	31	22
22	31	22
23	31	22
24	31	22
25	31	22
26	31	22
27	31	22
28	31	22
29	31	22
30	31	22
31	31	22

	Clearer (%)	Cloudier (%)
1	43	57
2	43	57
3	43	57
4	43	57
5	45	55
6	44	56
7	44	56
8	45	55
9	44	56
10	45	55
11	45	55
12	45	55
13	46	54
14	46	54
15	46	54
16	46	54
17	47	53
18	47	53
19	48	52
20	48	52
21	47	53
22	47	53
23	47	53
24	47	53
25	47	53
26	48	52
27	48	52
28	48	52
29	48	52
30	48	52
31	49	51

	Rain chance (%)
1	35
2	34
3	33
4	33
5	32
6	31
7	30
8	30
9	30
10	30
11	30
12	30
13	30
14	30
15	30
16	30
17	31
18	31
19	31
20	31
21	31
22	31
23	31
24	31
25	31
26	31
27	31
28	31
29	31
30	31
31	32

	Humid (%)	Muggy (%)	Oppressive (%)
1	0	66	34
2	0	65	35
3	0	64	36
4	0	64	36
5	0	63	37
6	0	63	37
7	1	61	38
8	1	61	38
9	1	61	38
10	1	61	38
11	1	61	38
12	1	60	39
13	1	60	39
14	1	60	39
15	1	60	39
16	1	61	38
17	1	61	38
18	1	61	38
19	1	61	38
20	1	61	38
21	1	61	38
22	1	61	38
23	1	61	38
24	1	61	38
25	1	61	38
26	0	62	38
27	0	62	38
28	0	61	39
29	0	61	39
30	0	60	40
31	0	59	41