Altamira weather in May

In May, Altamira sees average daytime highs of 30°C and overnight lows near 23°C, with 190 mm of rain across 26.2 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 6% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of May to 11 h 48 min by month's end. Set against the rest of the year, May is Altamira's 8th-clearest and 12th-windiest month. For the whole year in context, see Altamira's year-round climate.

Daytime high: 30°; 8th warmest
Overnight low: 23°; 8th coldest
Rainfall: 190 mm; 26.2 wet days
Daylight: 11 h 54 min; 6:29 AM – 6:21 PM
Cloud cover: 78%; 8th clearest
Wind: 6 km/h; 12th windiest
Solar energy: 4.06 kWh/m²
Travel score: 3.0; out of 10

Altamira is human settlement in Brazil.

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

← April Altamira 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 30°C through the month.

A typical May day in Altamira reaches about 30°C in the afternoon and slips back to 23°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°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)	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30
Avg low (°C)	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23

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

How May really feels in Altamira

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.

Altamira weather by month

How May compares with the rest of the year at a glance. May is the 8th-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	30° / 23°	248	28.1	12.2	2.8
Feb	29° / 23°	273	26.5	12.1	2.8
Mar	30° / 23°	328	29.1	12	2.8
Apr	30° / 23°	281	28.2	11.9	2.7
May	30° / 23°	190	26.2	11.9	3.0
Jun	31° / 23°	71	16.6	11.8	3.9
Jul	31° / 22°	46	10.2	11.8	4.4
Aug	33° / 23°	31	7.3	11.9	3.9
Sep	33° / 24°	34	7	12	3.7
Oct	33° / 24°	60	11.2	12.1	3.4
Nov	32° / 24°	100	15	12.1	3.3
Dec	31° / 24°	152	21.9	12.2	3.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 79%. 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 (%)	7	8	9	10	11	12	13	14	16	17	18	20	20	22	22	23	24	24	24	25	25	25	26	26	27	28	29	31	32	33	35
Cloudier (%)	93	92	91	90	89	88	87	86	84	83	82	80	80	78	78	77	76	76	76	75	75	75	74	74	73	72	71	69	68	67	65

	Clearer (%)	Cloudier (%)
1	7	93
2	8	92
3	9	91
4	10	90
5	11	89
6	12	88
7	13	87
8	14	86
9	16	84
10	17	83
11	18	82
12	20	80
13	20	80
14	22	78
15	22	78
16	23	77
17	24	76
18	24	76
19	24	76
20	25	75
21	25	75
22	25	75
23	26	74
24	26	74
25	27	73
26	28	72
27	29	71
28	31	69
29	32	68
30	33	67
31	35	65

Chance of precipitation in May

Any precipitation

Altamira gets around 190 mm of rain over 26.2 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 84% and peaks near 91% 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 (%)	91	91	90	90	90	89	89	88	88	87	87	86	86	86	85	85	85	84	84	83	82	82	81	80	79	78	77	75	74	73	71

	Rain chance (%)
1	91
2	91
3	90
4	90
5	90
6	89
7	89
8	88
9	88
10	87
11	87
12	86
13	86
14	86
15	85
16	85
17	85
18	84
19	84
20	83
21	82
22	82
23	81
24	80
25	79
26	78
27	77
28	75
29	74
30	73
31	71

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 65% of days. Sticky, muggy-or-worse air turns up on roughly 100% 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
Oppressive (%)	67	67	66	66	65	65	64	63	63	62	61	61	61	60	60	61	61	61	62	62	63	64	65	66	68	69	70	72	73	74	75
Miserable (%)	33	33	34	34	35	35	36	37	37	38	39	39	39	40	40	39	39	39	38	38	37	36	35	34	32	31	30	28	27	26	25

	Oppressive (%)	Miserable (%)
1	67	33
2	67	33
3	66	34
4	66	34
5	65	35
6	65	35
7	64	36
8	63	37
9	63	37
10	62	38
11	61	39
12	61	39
13	61	39
14	60	40
15	60	40
16	61	39
17	61	39
18	61	39
19	62	38
20	62	38
21	63	37
22	64	36
23	65	35
24	66	34
25	68	32
26	69	31
27	70	30
28	72	28
29	73	27
30	74	26
31	75	25

Wind in May

Winds average 6 km/h in May, the calmest month.

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

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 54 min at the start of May to 11 h 48 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 6:29 AM to 6:31 AM, and sunset from 6:23 PM to 6:21 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)	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	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
Sunrise (AM)	6:29	6:29	6:29	6:29	6:29	6:29	6:29	6:29	6:29	6:29	6:29	6:29	6:29	6:29	6:29	6:29	6:29	6:30	6:30	6:30	6:30	6:30	6:30	6:30	6:30	6:31	6:31	6:31	6:31	6:31	6:31
Sunset (PM)	6:23	6:23	6:22	6:22	6:22	6:22	6:22	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21	6:21

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.9	6:29	6:23
2	11.9	6:29	6:23
3	11.9	6:29	6:22
4	11.9	6:29	6:22
5	11.9	6:29	6:22
6	11.9	6:29	6:22
7	11.9	6:29	6:22
8	11.9	6:29	6:21
9	11.9	6:29	6:21
10	11.9	6:29	6:21
11	11.9	6:29	6:21
12	11.9	6:29	6:21
13	11.9	6:29	6:21
14	11.9	6:29	6:21
15	11.9	6:29	6:21
16	11.9	6:29	6:21
17	11.9	6:29	6:21
18	11.9	6:30	6:21
19	11.8	6:30	6:21
20	11.8	6:30	6:21
21	11.8	6:30	6:21
22	11.8	6:30	6:21
23	11.8	6:30	6:21
24	11.8	6:30	6:21
25	11.8	6:30	6:21
26	11.8	6:31	6:21
27	11.8	6:31	6:21
28	11.8	6:31	6:21
29	11.8	6:31	6:21
30	11.8	6:31	6:21
31	11.8	6:31	6:21

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.06 kWh/m².

For context, solar energy here swings from a low near 3.84 kWh/m² to a high of 6.18 kWh/m² in October across the year — May's 4.06 kWh/m² falls in the middle.

	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)	3.9	3.9	3.9	3.9	3.9	3.9	4.0	4.0	4.0	4.0	4.0	4.0	4.1	4.1	4.1	4.1	4.1	4.1	4.1	4.1	4.1	4.1	4.1	4.2	4.2	4.2	4.2	4.2	4.2	4.3	4.3
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	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	3.9	Moderate
2	3.9	Moderate
3	3.9	Moderate
4	3.9	Moderate
5	3.9	Moderate
6	3.9	Moderate
7	4.0	Moderate
8	4.0	Moderate
9	4.0	Moderate
10	4.0	Bright
11	4.0	Bright
12	4.0	Bright
13	4.1	Bright
14	4.1	Bright
15	4.1	Bright
16	4.1	Bright
17	4.1	Bright
18	4.1	Bright
19	4.1	Bright
20	4.1	Bright
21	4.1	Bright
22	4.1	Bright
23	4.1	Bright
24	4.2	Bright
25	4.2	Bright
26	4.2	Bright
27	4.2	Bright
28	4.2	Bright
29	4.2	Bright
30	4.3	Bright
31	4.3	Bright

Planning a trip in May

Hazard calendar for Altamira

In seasonPeak

In May, Altamira sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Altamira's monsoon runs December–May, when most of the year's rain falls.

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is May a good time to visit Altamira?

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

3.0

Sightseeing

8th-best month of the year

4.2

Beach & pool

8th-best month of the year

May is a weaker month for outdoor sightseeing in Altamira.

What to pack for Altamira in May

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

In May, Altamira sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. About 26 days see rain.

light clothesrain gear

UV index in Altamira 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 Altamira peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 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	15	15	15	11	10	10	10	12	12	10	11
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Extreme	Extreme	Extreme	Very high	Extreme

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

Air quality in Altamira in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Altamira is worst in November — around 40 µg/m³ PM2.5 (poor), about 4.7× the cleanest month (June, 9 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	15	15	15	13	10	9	9	12	18	34	40	23
Level	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Good	Moderate	Moderate	Poor	Moderate

	PM2.5 (µg/m³)	Level
Jan	15	Moderate
Feb	15	Moderate
Mar	15	Moderate
Apr	13	Moderate
May	10	Good
Jun	9	Good
Jul	9	Good
Aug	12	Good
Sep	18	Moderate
Oct	34	Moderate
Nov	40	Poor
Dec	23	Moderate

Location & terrain

Where is Altamira?

Altamira sits at 3.2°S, 52.2°W, 101 m above sea level, in Brazil. The nearest listed city is Brasil Novo, 39 km away.

Topography around Altamira

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

Within 3 km, the terrain around Altamira has only modest variations in elevation — a maximum elevation change of 105 m around an average of 116 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 210 m; within 80 km, significant variations in elevation — a maximum elevation change of 405 m.

The land around Altamira is covered by trees (31%), artificial surfaces (29%) and grassland (21%) within 3 km, grassland (44%) and trees (42%) within 16 km, and trees (65%) and grassland (29%) within 80 km.

3 km

105 m

trees 31%

16 km

210 m

grassland 44%

80 km

405 m

trees 65%

treesgrasslandartificial surfacesbare terrainwater

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

May weather nearby: Brasil Novo 39 km · Vitória do Xingu 42 km · Senador José Porfírio 74 km · Medicilândia 80 km · Anapu 116 km · Porto de Moz 162 km · Uruará 179 km · Pacajá 188 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 Altamira (-3.2033°, -52.2064°, elevation 101 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. 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).

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

	Clearer (%)	Cloudier (%)
1	7	93
2	8	92
3	9	91
4	10	90
5	11	89
6	12	88
7	13	87
8	14	86
9	16	84
10	17	83
11	18	82
12	20	80
13	20	80
14	22	78
15	22	78
16	23	77
17	24	76
18	24	76
19	24	76
20	25	75
21	25	75
22	25	75
23	26	74
24	26	74
25	27	73
26	28	72
27	29	71
28	31	69
29	32	68
30	33	67
31	35	65

	Rain chance (%)
1	91
2	91
3	90
4	90
5	90
6	89
7	89
8	88
9	88
10	87
11	87
12	86
13	86
14	86
15	85
16	85
17	85
18	84
19	84
20	83
21	82
22	82
23	81
24	80
25	79
26	78
27	77
28	75
29	74
30	73
31	71

	Oppressive (%)	Miserable (%)
1	67	33
2	67	33
3	66	34
4	66	34
5	65	35
6	65	35
7	64	36
8	63	37
9	63	37
10	62	38
11	61	39
12	61	39
13	61	39
14	60	40
15	60	40
16	61	39
17	61	39
18	61	39
19	62	38
20	62	38
21	63	37
22	64	36
23	65	35
24	66	34
25	68	32
26	69	31
27	70	30
28	72	28
29	73	27
30	74	26
31	75	25

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

	Clearer (%)	Cloudier (%)
1	7	93
2	8	92
3	9	91
4	10	90
5	11	89
6	12	88
7	13	87
8	14	86
9	16	84
10	17	83
11	18	82
12	20	80
13	20	80
14	22	78
15	22	78
16	23	77
17	24	76
18	24	76
19	24	76
20	25	75
21	25	75
22	25	75
23	26	74
24	26	74
25	27	73
26	28	72
27	29	71
28	31	69
29	32	68
30	33	67
31	35	65

	Rain chance (%)
1	91
2	91
3	90
4	90
5	90
6	89
7	89
8	88
9	88
10	87
11	87
12	86
13	86
14	86
15	85
16	85
17	85
18	84
19	84
20	83
21	82
22	82
23	81
24	80
25	79
26	78
27	77
28	75
29	74
30	73
31	71

	Oppressive (%)	Miserable (%)
1	67	33
2	67	33
3	66	34
4	66	34
5	65	35
6	65	35
7	64	36
8	63	37
9	63	37
10	62	38
11	61	39
12	61	39
13	61	39
14	60	40
15	60	40
16	61	39
17	61	39
18	61	39
19	62	38
20	62	38
21	63	37
22	64	36
23	65	35
24	66	34
25	68	32
26	69	31
27	70	30
28	72	28
29	73	27
30	74	26
31	75	25

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

	Clearer (%)	Cloudier (%)
1	7	93
2	8	92
3	9	91
4	10	90
5	11	89
6	12	88
7	13	87
8	14	86
9	16	84
10	17	83
11	18	82
12	20	80
13	20	80
14	22	78
15	22	78
16	23	77
17	24	76
18	24	76
19	24	76
20	25	75
21	25	75
22	25	75
23	26	74
24	26	74
25	27	73
26	28	72
27	29	71
28	31	69
29	32	68
30	33	67
31	35	65

	Rain chance (%)
1	91
2	91
3	90
4	90
5	90
6	89
7	89
8	88
9	88
10	87
11	87
12	86
13	86
14	86
15	85
16	85
17	85
18	84
19	84
20	83
21	82
22	82
23	81
24	80
25	79
26	78
27	77
28	75
29	74
30	73
31	71

	Oppressive (%)	Miserable (%)
1	67	33
2	67	33
3	66	34
4	66	34
5	65	35
6	65	35
7	64	36
8	63	37
9	63	37
10	62	38
11	61	39
12	61	39
13	61	39
14	60	40
15	60	40
16	61	39
17	61	39
18	61	39
19	62	38
20	62	38
21	63	37
22	64	36
23	65	35
24	66	34
25	68	32
26	69	31
27	70	30
28	72	28
29	73	27
30	74	26
31	75	25