Açu weather in May

In May, Açu sees average daytime highs of 33°C and overnight lows near 24°C, with 40 mm of rain across 6.7 wet days and about 11.7 hours of daylight. It is the 9th-warmest and 5th-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 33% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 11 h 48 min at the start of May to 11 h 42 min by month's end. Set against the rest of the year, May is Açu's 8th-clearest and 10th-windiest month. For the whole year in context, see Açu's year-round climate.

Daytime high: 33°; 9th warmest
Overnight low: 24°; 6th coldest
Rainfall: 40 mm; 6.7 wet days
Daylight: 11 h 42 min; 5:31 AM – 5:16 PM
Cloud cover: 55%; 8th clearest
Wind: 12 km/h; 10th windiest
Solar energy: 5.08 kWh/m²
Travel score: 3.6; out of 10

Açu is human settlement in Brazil.

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

← April Açu 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 33°C through the month.

A typical May day in Açu reaches about 33°C in the afternoon and slips back to 24°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 36°C. Set against its neighbours, May runs on par with April and on par with 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)	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33
Avg low (°C)	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24

	Avg high (°C)	Avg low (°C)
1	33	24
2	33	24
3	33	24
4	33	24
5	33	24
6	33	24
7	33	24
8	33	24
9	33	24
10	33	24
11	33	24
12	33	24
13	33	24
14	33	24
15	33	24
16	33	24
17	33	24
18	33	24
19	33	24
20	33	24
21	33	24
22	33	24
23	33	24
24	33	24
25	33	24
26	33	24
27	33	24
28	33	24
29	33	24
30	33	24
31	33	24

How May really feels in Açu

Once humidity and wind are folded in, May 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 May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Açu weather by month

How May compares with the rest of the year at a glance. May is the 9th-warmest and 5th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	35° / 24°	50	8.7	12.3	2.7
Feb	34° / 24°	63	10.5	12.2	2.8
Mar	33° / 24°	92	14.8	12	2.9
Apr	33° / 24°	86	13.3	11.9	3.2
May	33° / 24°	40	6.7	11.7	3.6
Jun	33° / 23°	24	4.3	11.7	4.1
Jul	33° / 22°	15	2.4	11.7	4.2
Aug	34° / 22°	3	0.4	11.8	3.7
Sep	35° / 23°	1	0.1	12	3.1
Oct	36° / 23°	1	0.1	12.1	2.7
Nov	36° / 24°	2	0.4	12.3	2.7
Dec	36° / 24°	10	2.5	12.3	2.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 25% of May, with mostly cloudy or overcast conditions the remaining 42%. Skies tend to open up as the month goes on.

	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 (%)	46	46	48	49	50	51	52	53	54	55	56	56	56	58	58	58	59	60	61	61	62	62	63	63	64	64	64	65	65	65	64
Cloudier (%)	54	54	52	51	50	49	48	47	46	45	44	44	44	42	42	42	41	40	39	39	38	38	37	37	36	36	36	35	35	35	36

	Clearer (%)	Cloudier (%)
1	46	54
2	46	54
3	48	52
4	49	51
5	50	50
6	51	49
7	52	48
8	53	47
9	54	46
10	55	45
11	56	44
12	56	44
13	56	44
14	58	42
15	58	42
16	58	42
17	59	41
18	60	40
19	61	39
20	61	39
21	62	38
22	62	38
23	63	37
24	63	37
25	64	36
26	64	36
27	64	36
28	65	35
29	65	35
30	65	35
31	64	36

Chance of precipitation in May

Any precipitation

Açu gets around 40 mm of rain over 6.7 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 22% and peaks near 34% on the wettest days. The odds ease toward the end of the month.

	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 (%)	34	32	31	30	29	27	26	25	24	23	22	21	21	20	20	20	20	20	20	20	20	19	19	19	19	19	18	18	18	17	17

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

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 97% 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	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	3	3	3	4	4	5	5	6	7	7
Muggy (%)	25	26	27	29	30	31	32	34	35	36	37	38	39	40	40	41	42	43	43	44	45	45	46	47	48	48	49	51	51	52	54
Oppressive (%)	71	70	69	67	66	65	64	62	61	60	59	58	57	56	56	56	55	54	54	53	52	51	50	49	48	47	46	44	43	41	39
Miserable (%)	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	1	1	1	1	1	1	1	1	1	0	0	0	0	0	0	0

	Humid (%)	Muggy (%)	Oppressive (%)	Miserable (%)
1	2	25	71	2
2	2	26	70	2
3	2	27	69	2
4	2	29	67	2
5	2	30	66	2
6	2	31	65	2
7	2	32	64	2
8	2	34	62	2
9	2	35	61	2
10	2	36	60	2
11	2	37	59	2
12	2	38	58	2
13	2	39	57	2
14	2	40	56	2
15	2	40	56	2
16	2	41	56	1
17	2	42	55	1
18	2	43	54	1
19	2	43	54	1
20	2	44	53	1
21	2	45	52	1
22	3	45	51	1
23	3	46	50	1
24	3	47	49	1
25	4	48	48	0
26	4	48	47	0
27	5	49	46	0
28	5	51	44	0
29	6	51	43	0
30	7	52	41	0
31	7	54	39	0

Wind in May

Winds average 12 km/h in May.

Across May, daily wind ranges from about 11 km/h on the calmest days to 13 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)	11	11	11	11	11	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	13	13	13	13	13	13	13	13	13	13	13
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

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

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 48 min at the start of May to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over May. Sunrise moves from 5:31 AM to 5:34 AM, and sunset from 5:19 PM to 5:16 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)	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.7	11.7	11.7	11.7	11.7	11.7	11.7	11.7	11.7	11.7	11.7	11.7	11.7	11.7	11.7	11.7
Sunrise (AM)	5:31	5:31	5:31	5:31	5:31	5:31	5:31	5:31	5:31	5:31	5:31	5:31	5:31	5:31	5:31	5:31	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:33	5:33	5:33	5:33	5:33	5:34	5:34	5:34
Sunset (PM)	5:19	5:19	5:19	5:18	5:18	5:18	5:18	5:17	5:17	5:17	5:17	5:17	5:17	5:17	5:16	5:16	5:16	5:16	5:16	5:16	5:16	5:16	5:16	5:16	5:16	5:16	5:16	5:16	5:16	5:16	5:16

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.8	5:31	5:19
2	11.8	5:31	5:19
3	11.8	5:31	5:19
4	11.8	5:31	5:18
5	11.8	5:31	5:18
6	11.8	5:31	5:18
7	11.8	5:31	5:18
8	11.8	5:31	5:17
9	11.8	5:31	5:17
10	11.8	5:31	5:17
11	11.8	5:31	5:17
12	11.8	5:31	5:17
13	11.8	5:31	5:17
14	11.8	5:31	5:17
15	11.8	5:31	5:16
16	11.7	5:31	5:16
17	11.7	5:32	5:16
18	11.7	5:32	5:16
19	11.7	5:32	5:16
20	11.7	5:32	5:16
21	11.7	5:32	5:16
22	11.7	5:32	5:16
23	11.7	5:32	5:16
24	11.7	5:33	5:16
25	11.7	5:33	5:16
26	11.7	5:33	5:16
27	11.7	5:33	5:16
28	11.7	5:33	5:16
29	11.7	5:34	5:16
30	11.7	5:34	5:16
31	11.7	5:34	5:16

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.08 kWh/m².

For context, solar energy here swings from a low near 4.66 kWh/m² to a high of 6.8 kWh/m² in October across the year — May's 5.08 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)	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.1	5.1	5.1	5.1	5.1	5.1	5.1	5.1	5.1	5.1	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	4.9	4.9	4.9	4.9
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	5.2	Bright
2	5.2	Bright
3	5.2	Bright
4	5.2	Bright
5	5.2	Bright
6	5.2	Bright
7	5.2	Bright
8	5.2	Bright
9	5.2	Bright
10	5.1	Bright
11	5.1	Bright
12	5.1	Bright
13	5.1	Bright
14	5.1	Bright
15	5.1	Bright
16	5.1	Bright
17	5.1	Bright
18	5.1	Bright
19	5.1	Bright
20	5.0	Bright
21	5.0	Bright
22	5.0	Bright
23	5.0	Bright
24	5.0	Bright
25	5.0	Bright
26	5.0	Bright
27	5.0	Bright
28	4.9	Bright
29	4.9	Bright
30	4.9	Bright
31	4.9	Bright

Planning a trip in May

Is May a good time to visit Açu?

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

3.6

Sightseeing

4th-best month of the year

6.6

Beach & pool

5th-best month of the year

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

What to pack for Açu in May

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

In May, Açu sees daytime highs around 33°C and nights near 24°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Açu in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Açu peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 14 at about 10 (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)	13	14	15	14	11	10	10	10	12	12	12	12
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Extreme

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

Location & terrain

Where is Açu?

Açu sits at 5.6°S, 36.9°W, 36 m above sea level, in Brazil. The nearest listed city is Jucurutu, 52 km away.

Topography around Açu

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

Within 3 km, the terrain around Açu has only modest variations in elevation — a maximum elevation change of 78 m around an average of 37 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 132 m; within 80 km, large variations in elevation — a maximum elevation change of 749 m.

The land around Açu is covered by grassland (35%) and artificial surfaces (22%) within 3 km, shrubs (49%) and grassland (35%) within 16 km, and shrubs (66%) and grassland (20%) within 80 km.

3 km

78 m

grassland 35%

16 km

132 m

shrubs 49%

80 km

749 m

shrubs 66%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland

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

May weather nearby: Jucurutu 52 km · Macau 60 km · Mossoró 65 km · Areia Branca 73 km · Lagoa Nova 75 km · Caraúbas 76 km · Guamaré 83 km · Currais Novos 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

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 Açu (-5.5767°, -36.9086°, elevation 36 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	33	24
2	33	24
3	33	24
4	33	24
5	33	24
6	33	24
7	33	24
8	33	24
9	33	24
10	33	24
11	33	24
12	33	24
13	33	24
14	33	24
15	33	24
16	33	24
17	33	24
18	33	24
19	33	24
20	33	24
21	33	24
22	33	24
23	33	24
24	33	24
25	33	24
26	33	24
27	33	24
28	33	24
29	33	24
30	33	24
31	33	24

	Clearer (%)	Cloudier (%)
1	46	54
2	46	54
3	48	52
4	49	51
5	50	50
6	51	49
7	52	48
8	53	47
9	54	46
10	55	45
11	56	44
12	56	44
13	56	44
14	58	42
15	58	42
16	58	42
17	59	41
18	60	40
19	61	39
20	61	39
21	62	38
22	62	38
23	63	37
24	63	37
25	64	36
26	64	36
27	64	36
28	65	35
29	65	35
30	65	35
31	64	36

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

	Humid (%)	Muggy (%)	Oppressive (%)	Miserable (%)
1	2	25	71	2
2	2	26	70	2
3	2	27	69	2
4	2	29	67	2
5	2	30	66	2
6	2	31	65	2
7	2	32	64	2
8	2	34	62	2
9	2	35	61	2
10	2	36	60	2
11	2	37	59	2
12	2	38	58	2
13	2	39	57	2
14	2	40	56	2
15	2	40	56	2
16	2	41	56	1
17	2	42	55	1
18	2	43	54	1
19	2	43	54	1
20	2	44	53	1
21	2	45	52	1
22	3	45	51	1
23	3	46	50	1
24	3	47	49	1
25	4	48	48	0
26	4	48	47	0
27	5	49	46	0
28	5	51	44	0
29	6	51	43	0
30	7	52	41	0
31	7	54	39	0

	Avg high (°C)	Avg low (°C)
1	33	24
2	33	24
3	33	24
4	33	24
5	33	24
6	33	24
7	33	24
8	33	24
9	33	24
10	33	24
11	33	24
12	33	24
13	33	24
14	33	24
15	33	24
16	33	24
17	33	24
18	33	24
19	33	24
20	33	24
21	33	24
22	33	24
23	33	24
24	33	24
25	33	24
26	33	24
27	33	24
28	33	24
29	33	24
30	33	24
31	33	24

	Clearer (%)	Cloudier (%)
1	46	54
2	46	54
3	48	52
4	49	51
5	50	50
6	51	49
7	52	48
8	53	47
9	54	46
10	55	45
11	56	44
12	56	44
13	56	44
14	58	42
15	58	42
16	58	42
17	59	41
18	60	40
19	61	39
20	61	39
21	62	38
22	62	38
23	63	37
24	63	37
25	64	36
26	64	36
27	64	36
28	65	35
29	65	35
30	65	35
31	64	36

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

	Humid (%)	Muggy (%)	Oppressive (%)	Miserable (%)
1	2	25	71	2
2	2	26	70	2
3	2	27	69	2
4	2	29	67	2
5	2	30	66	2
6	2	31	65	2
7	2	32	64	2
8	2	34	62	2
9	2	35	61	2
10	2	36	60	2
11	2	37	59	2
12	2	38	58	2
13	2	39	57	2
14	2	40	56	2
15	2	40	56	2
16	2	41	56	1
17	2	42	55	1
18	2	43	54	1
19	2	43	54	1
20	2	44	53	1
21	2	45	52	1
22	3	45	51	1
23	3	46	50	1
24	3	47	49	1
25	4	48	48	0
26	4	48	47	0
27	5	49	46	0
28	5	51	44	0
29	6	51	43	0
30	7	52	41	0
31	7	54	39	0

	Avg high (°C)	Avg low (°C)
1	33	24
2	33	24
3	33	24
4	33	24
5	33	24
6	33	24
7	33	24
8	33	24
9	33	24
10	33	24
11	33	24
12	33	24
13	33	24
14	33	24
15	33	24
16	33	24
17	33	24
18	33	24
19	33	24
20	33	24
21	33	24
22	33	24
23	33	24
24	33	24
25	33	24
26	33	24
27	33	24
28	33	24
29	33	24
30	33	24
31	33	24

	Clearer (%)	Cloudier (%)
1	46	54
2	46	54
3	48	52
4	49	51
5	50	50
6	51	49
7	52	48
8	53	47
9	54	46
10	55	45
11	56	44
12	56	44
13	56	44
14	58	42
15	58	42
16	58	42
17	59	41
18	60	40
19	61	39
20	61	39
21	62	38
22	62	38
23	63	37
24	63	37
25	64	36
26	64	36
27	64	36
28	65	35
29	65	35
30	65	35
31	64	36

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

	Humid (%)	Muggy (%)	Oppressive (%)	Miserable (%)
1	2	25	71	2
2	2	26	70	2
3	2	27	69	2
4	2	29	67	2
5	2	30	66	2
6	2	31	65	2
7	2	32	64	2
8	2	34	62	2
9	2	35	61	2
10	2	36	60	2
11	2	37	59	2
12	2	38	58	2
13	2	39	57	2
14	2	40	56	2
15	2	40	56	2
16	2	41	56	1
17	2	42	55	1
18	2	43	54	1
19	2	43	54	1
20	2	44	53	1
21	2	45	52	1
22	3	45	51	1
23	3	46	50	1
24	3	47	49	1
25	4	48	48	0
26	4	48	47	0
27	5	49	46	0
28	5	51	44	0
29	6	51	43	0
30	7	52	41	0
31	7	54	39	0