Castro Alves weather in May

In May, Castro Alves sees average daytime highs of 28°C and overnight lows near 21°C, with 35 mm of rain across 12 wet days and about 11.4 hours of daylight. It is the 8th-warmest and 8th-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 18% of the time in May, and the air most often feels muggy.

Daylight stretches from about 11 h 36 min at the start of May to 11 h 18 min by month's end. Set against the rest of the year, May is Castro Alves's 9th-clearest and 6th-windiest month. For the whole year in context, see Castro Alves's year-round climate.

Daytime high: 28°; 8th warmest
Overnight low: 21°; 6th coldest
Rainfall: 35 mm; 12 wet days
Daylight: 11 h 24 min; 5:52 AM – 5:16 PM
Cloud cover: 60%; 9th clearest
Wind: 10 km/h; 6th windiest
Solar energy: 3.83 kWh/m²
Travel score: 5.5; out of 10

Castro Alves is human settlement in Brazil.

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

← April Castro Alves year-round climate June →Best places to visit in May

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical May day in Castro Alves reaches about 28°C in the afternoon and slips back to 21°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 31°C. Set against its neighbours, May runs about 2°C cooler than April and about 2°C warmer than June.

	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)	29	29	29	29	29	29	29	29	29	29	29	29	29	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28
Avg low (°C)	22	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	20	20

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

How May really feels in Castro Alves

Once humidity and wind are folded in, May 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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Castro Alves weather by month

How May compares with the rest of the year at a glance. May is the 8th-warmest and 8th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 34% of May, with mostly cloudy or overcast conditions the remaining 48%.

	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 (%)	55	55	55	54	53	53	52	52	52	50	50	49	49	48	48	48	48	48	49	50	50	52	52	53	53	53	54	55	55	55	55
Cloudier (%)	45	45	45	46	47	47	48	48	48	50	50	51	51	52	52	52	52	52	51	50	50	48	48	47	47	47	46	45	45	45	45

	Clearer (%)	Cloudier (%)
1	55	45
2	55	45
3	55	45
4	54	46
5	53	47
6	53	47
7	52	48
8	52	48
9	52	48
10	50	50
11	50	50
12	49	51
13	49	51
14	48	52
15	48	52
16	48	52
17	48	52
18	48	52
19	49	51
20	50	50
21	50	50
22	52	48
23	52	48
24	53	47
25	53	47
26	53	47
27	54	46
28	55	45
29	55	45
30	55	45
31	55	45

Chance of precipitation in May

Any precipitation

Castro Alves gets around 35 mm of rain over 12 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 39% and peaks near 44% 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 (%)	44	43	42	41	41	40	40	39	39	38	38	38	38	38	38	38	38	39	39	39	39	39	39	39	39	39	39	39	39	39	39

	Rain chance (%)
1	44
2	43
3	42
4	41
5	41
6	40
7	40
8	39
9	39
10	38
11	38
12	38
13	38
14	38
15	38
16	38
17	38
18	39
19	39
20	39
21	39
22	39
23	39
24	39
25	39
26	39
27	39
28	39
29	39
30	39
31	39

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the muggy band about 62% of days. Sticky, muggy-or-worse air turns up on roughly 93% 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 (%)	2	2	2	3	3	4	4	5	5	6	6	7	7	8	8	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9
Muggy (%)	50	51	53	53	55	55	57	57	58	58	59	59	61	61	61	61	62	63	64	64	65	66	67	68	69	70	71	72	73	74	75
Oppressive (%)	49	47	45	44	42	41	39	38	37	36	35	34	32	31	31	30	29	28	27	27	26	25	24	23	22	21	20	19	18	17	16

	Humid (%)	Muggy (%)	Oppressive (%)
1	2	50	49
2	2	51	47
3	2	53	45
4	3	53	44
5	3	55	42
6	4	55	41
7	4	57	39
8	5	57	38
9	5	58	37
10	6	58	36
11	6	59	35
12	7	59	34
13	7	61	32
14	8	61	31
15	8	61	31
16	9	61	30
17	9	62	29
18	9	63	28
19	9	64	27
20	9	64	27
21	9	65	26
22	9	66	25
23	9	67	24
24	9	68	23
25	9	69	22
26	9	70	21
27	9	71	20
28	9	72	19
29	9	73	18
30	9	74	17
31	9	75	16

Wind in May

Winds average 10 km/h in May.

Across May, daily wind ranges from about 10 km/h on the calmest days to 11 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)	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	11	11	11
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	10	calm
2	10	calm
3	10	calm
4	10	calm
5	10	calm
6	10	calm
7	10	calm
8	10	calm
9	10	calm
10	10	calm
11	10	calm
12	10	calm
13	10	calm
14	10	calm
15	10	calm
16	10	calm
17	10	calm
18	10	calm
19	10	calm
20	10	calm
21	10	calm
22	10	calm
23	10	calm
24	10	calm
25	10	calm
26	10	calm
27	10	calm
28	10	calm
29	11	calm
30	11	calm
31	11	calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 36 min at the start of May to 11 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over May. Sunrise moves from 5:48 AM to 5:56 AM, and sunset from 5:21 PM to 5:14 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)	11.6	11.5	11.5	11.5	11.5	11.5	11.5	11.5	11.5	11.5	11.5	11.4	11.4	11.4	11.4	11.4	11.4	11.4	11.4	11.4	11.4	11.4	11.4	11.4	11.3	11.3	11.3	11.3	11.3	11.3	11.3
Sunrise (AM)	5:48	5:49	5:49	5:49	5:49	5:49	5:49	5:50	5:50	5:50	5:50	5:51	5:51	5:51	5:51	5:52	5:52	5:52	5:52	5:53	5:53	5:53	5:53	5:54	5:54	5:54	5:55	5:55	5:55	5:56	5:56
Sunset (PM)	5:21	5:21	5:21	5:20	5:20	5:19	5:19	5:19	5:18	5:18	5:18	5:17	5:17	5:17	5:17	5:16	5:16	5:16	5:16	5:16	5:15	5:15	5:15	5:15	5:15	5:15	5:15	5:15	5:14	5:14	5:14

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.6	5:48	5:21
2	11.5	5:49	5:21
3	11.5	5:49	5:21
4	11.5	5:49	5:20
5	11.5	5:49	5:20
6	11.5	5:49	5:19
7	11.5	5:49	5:19
8	11.5	5:50	5:19
9	11.5	5:50	5:18
10	11.5	5:50	5:18
11	11.5	5:50	5:18
12	11.4	5:51	5:17
13	11.4	5:51	5:17
14	11.4	5:51	5:17
15	11.4	5:51	5:17
16	11.4	5:52	5:16
17	11.4	5:52	5:16
18	11.4	5:52	5:16
19	11.4	5:52	5:16
20	11.4	5:53	5:16
21	11.4	5:53	5:15
22	11.4	5:53	5:15
23	11.4	5:53	5:15
24	11.4	5:54	5:15
25	11.3	5:54	5:15
26	11.3	5:54	5:15
27	11.3	5:55	5:15
28	11.3	5:55	5:15
29	11.3	5:55	5:14
30	11.3	5:56	5:14
31	11.3	5:56	5:14

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.83 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 — May's 3.83 kWh/m² sits near the bottom.

	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)	4.2	4.1	4.1	4.1	4.0	4.0	4.0	4.0	3.9	3.9	3.9	3.9	3.9	3.8	3.8	3.8	3.8	3.8	3.8	3.7	3.7	3.7	3.7	3.7	3.7	3.6	3.6	3.6	3.6	3.6	3.6
Level	Bright	Bright	Bright	Bright	Bright	Bright	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	4.2	Bright
2	4.1	Bright
3	4.1	Bright
4	4.1	Bright
5	4.0	Bright
6	4.0	Bright
7	4.0	Moderate
8	4.0	Moderate
9	3.9	Moderate
10	3.9	Moderate
11	3.9	Moderate
12	3.9	Moderate
13	3.9	Moderate
14	3.8	Moderate
15	3.8	Moderate
16	3.8	Moderate
17	3.8	Moderate
18	3.8	Moderate
19	3.8	Moderate
20	3.7	Moderate
21	3.7	Moderate
22	3.7	Moderate
23	3.7	Moderate
24	3.7	Moderate
25	3.7	Moderate
26	3.6	Moderate
27	3.6	Moderate
28	3.6	Moderate
29	3.6	Moderate
30	3.6	Moderate
31	3.6	Moderate

Planning a trip in May

Is May a good time to visit Castro Alves?

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

5.5

Sightseeing

5th-best month of the year

6.5

Beach & pool

4th-best month of the year

May 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 May

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

In May, Castro Alves sees daytime highs around 28°C and nights near 21°C. Pack light clothes. Worth having: rain gear. About 12 days see rain.

light clothesrain gear

UV index in Castro Alves in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 9 (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

← April Castro Alves year-round climate June →Best places to visit in May

May 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	29	22
2	29	21
3	29	21
4	29	21
5	29	21
6	29	21
7	29	21
8	29	21
9	29	21
10	29	21
11	29	21
12	29	21
13	29	21
14	28	21
15	28	21
16	28	21
17	28	21
18	28	21
19	28	21
20	28	21
21	28	21
22	28	21
23	28	21
24	28	21
25	28	21
26	28	21
27	28	21
28	28	21
29	28	21
30	28	20
31	28	20

	Clearer (%)	Cloudier (%)
1	55	45
2	55	45
3	55	45
4	54	46
5	53	47
6	53	47
7	52	48
8	52	48
9	52	48
10	50	50
11	50	50
12	49	51
13	49	51
14	48	52
15	48	52
16	48	52
17	48	52
18	48	52
19	49	51
20	50	50
21	50	50
22	52	48
23	52	48
24	53	47
25	53	47
26	53	47
27	54	46
28	55	45
29	55	45
30	55	45
31	55	45

	Rain chance (%)
1	44
2	43
3	42
4	41
5	41
6	40
7	40
8	39
9	39
10	38
11	38
12	38
13	38
14	38
15	38
16	38
17	38
18	39
19	39
20	39
21	39
22	39
23	39
24	39
25	39
26	39
27	39
28	39
29	39
30	39
31	39

	Humid (%)	Muggy (%)	Oppressive (%)
1	2	50	49
2	2	51	47
3	2	53	45
4	3	53	44
5	3	55	42
6	4	55	41
7	4	57	39
8	5	57	38
9	5	58	37
10	6	58	36
11	6	59	35
12	7	59	34
13	7	61	32
14	8	61	31
15	8	61	31
16	9	61	30
17	9	62	29
18	9	63	28
19	9	64	27
20	9	64	27
21	9	65	26
22	9	66	25
23	9	67	24
24	9	68	23
25	9	69	22
26	9	70	21
27	9	71	20
28	9	72	19
29	9	73	18
30	9	74	17
31	9	75	16

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

	Clearer (%)	Cloudier (%)
1	55	45
2	55	45
3	55	45
4	54	46
5	53	47
6	53	47
7	52	48
8	52	48
9	52	48
10	50	50
11	50	50
12	49	51
13	49	51
14	48	52
15	48	52
16	48	52
17	48	52
18	48	52
19	49	51
20	50	50
21	50	50
22	52	48
23	52	48
24	53	47
25	53	47
26	53	47
27	54	46
28	55	45
29	55	45
30	55	45
31	55	45

	Rain chance (%)
1	44
2	43
3	42
4	41
5	41
6	40
7	40
8	39
9	39
10	38
11	38
12	38
13	38
14	38
15	38
16	38
17	38
18	39
19	39
20	39
21	39
22	39
23	39
24	39
25	39
26	39
27	39
28	39
29	39
30	39
31	39

	Humid (%)	Muggy (%)	Oppressive (%)
1	2	50	49
2	2	51	47
3	2	53	45
4	3	53	44
5	3	55	42
6	4	55	41
7	4	57	39
8	5	57	38
9	5	58	37
10	6	58	36
11	6	59	35
12	7	59	34
13	7	61	32
14	8	61	31
15	8	61	31
16	9	61	30
17	9	62	29
18	9	63	28
19	9	64	27
20	9	64	27
21	9	65	26
22	9	66	25
23	9	67	24
24	9	68	23
25	9	69	22
26	9	70	21
27	9	71	20
28	9	72	19
29	9	73	18
30	9	74	17
31	9	75	16

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

	Clearer (%)	Cloudier (%)
1	55	45
2	55	45
3	55	45
4	54	46
5	53	47
6	53	47
7	52	48
8	52	48
9	52	48
10	50	50
11	50	50
12	49	51
13	49	51
14	48	52
15	48	52
16	48	52
17	48	52
18	48	52
19	49	51
20	50	50
21	50	50
22	52	48
23	52	48
24	53	47
25	53	47
26	53	47
27	54	46
28	55	45
29	55	45
30	55	45
31	55	45

	Rain chance (%)
1	44
2	43
3	42
4	41
5	41
6	40
7	40
8	39
9	39
10	38
11	38
12	38
13	38
14	38
15	38
16	38
17	38
18	39
19	39
20	39
21	39
22	39
23	39
24	39
25	39
26	39
27	39
28	39
29	39
30	39
31	39

	Humid (%)	Muggy (%)	Oppressive (%)
1	2	50	49
2	2	51	47
3	2	53	45
4	3	53	44
5	3	55	42
6	4	55	41
7	4	57	39
8	5	57	38
9	5	58	37
10	6	58	36
11	6	59	35
12	7	59	34
13	7	61	32
14	8	61	31
15	8	61	31
16	9	61	30
17	9	62	29
18	9	63	28
19	9	64	27
20	9	64	27
21	9	65	26
22	9	66	25
23	9	67	24
24	9	68	23
25	9	69	22
26	9	70	21
27	9	71	20
28	9	72	19
29	9	73	18
30	9	74	17
31	9	75	16