Goiás weather in May

In May, Goiás sees average daytime highs of 31°C and overnight lows near 20°C, with 13 mm of rain across 2.5 wet days and about 11.3 hours of daylight. It is the 5th-warmest and 9th-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 56% of the time in May, and the air most often feels humid.

Daylight stretches from about 11 h 24 min at the start of May to 11 h 06 min by month's end. Set against the rest of the year, May is Goiás's 4th-clearest and 5th-windiest month. For the whole year in context, see Goiás's year-round climate.

Daytime high
31°
5th warmest
Overnight low
20°
3rd coldest
Rainfall
13 mm
2.5 wet days
Daylight
11 h 18 min
7:39 AM – 6:55 PM
Cloud cover
41%
4th clearest
Wind
8 km/h
5th windiest
Solar energy
4.9 kWh/m²
Travel score
5.6
out of 10

Goiás is human settlement in Brazil.

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical May day in Goiás reaches about 31°C in the afternoon and slips back to 20°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 32°C. Set against its neighbours, May runs on par with April and on par with June.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13120
23120
33120
43120
53120
63120
73120
83120
93120
103120
113120
123120
133120
143120
153120
163120
173120
183120
193120
203120
213120
223120
233120
243120
253119
263119
273119
283119
293119
303119
313119

How May really feels in Goiás

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
0
heat index over the day's high
Days feeling ≤ C
0
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.

Goiás weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 21°27825.112.83.4
Feb30° / 21°2172312.53.3
Mar30° / 21°21624.312.13.4
Apr31° / 21°9513.711.74.3
May31° / 20°132.511.35.6
Jun31° / 19°30.711.16.1
Jul31° / 19°10.211.15.9
Aug33° / 20°50.911.54.5
Sep34° / 22°275.411.93.3
Oct33° / 22°11616.612.43.0
Nov30° / 22°20423.412.73.2
Dec29° / 21°27425.612.93.3

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 26%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17525
27525
37525
47426
57426
67426
77327
87228
97129
107030
117030
126931
136832
146931
156931
166931
177030
187030
197129
207228
217426
227426
237525
247624
257624
267822
277921
287921
297921
308020
318020

Chance of precipitation in May

Any precipitation

Goiás gets around 13 mm of rain over 2.5 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 9% and peaks near 14% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
114
213
312
411
510
610
79
89
99
109
1110
1210
1310
1410
1510
1610
1710
1810
199
209
219
229
238
248
257
267
276
286
295
305
315

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the humid band about 44% of days. Sticky, muggy-or-worse air turns up on roughly 22% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
121544345
221745324
321846304
422046284
532246273
632346253
732446242
842645242
942745232
1042744232
1152844222
1252843221
1362943221
1462843211
1572843211
1672844211
1782744200
1892744200
1992744200
20102744190
21112744180
22112745180
23122745170
24122845160
25122845150
26132945130
27133044120
28133144120
29143343110
30143442100
3114364190

Wind in May

Winds average 8 km/h in May.

Across May, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
17calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 24 min at the start of May to 11 h 06 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 7:35 AM to 7:44 AM, and sunset from 7:01 PM to 6:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:357:01
211.47:357:00
311.47:357:00
411.47:356:59
511.47:366:59
611.47:366:58
711.47:366:58
811.37:376:57
911.37:376:57
1011.37:376:57
1111.37:376:56
1211.37:386:56
1311.37:386:56
1411.37:386:55
1511.37:396:55
1611.37:396:55
1711.27:396:54
1811.27:406:54
1911.27:406:54
2011.27:406:54
2111.27:416:53
2211.27:416:53
2311.27:416:53
2411.27:426:53
2511.27:426:53
2611.27:426:52
2711.27:436:52
2811.27:436:52
2911.17:436:52
3011.17:446:52
3111.17:446:52

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.9 kWh/m².

For context, solar energy here swings from a low near 4.56 kWh/m² to a high of 6.09 kWh/m² in October across the year — May's 4.9 kWh/m² sits near the bottom.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in May

Hazard calendar for Goiás

In seasonPeak

None of Goiás's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Goiás's monsoon runs November–March, 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 Goiás?

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

5.6
Sightseeing
3rd-best month of the year
8.1
Beach & pool
3rd-best month of the year

May is a reasonable time to visit Goiás for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Goiás in May

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

In May, Goiás sees daytime highs around 31°C and nights near 20°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Goiás 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 Goiás peaks around January 23 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 23UV 15Jun 22UV 8
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov13Extreme
Dec14Extreme

Air quality in Goiás 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 Goiás is worst in September — around 22 µg/m³ PM2.5 (moderate), about 4.9× the cleanest month (July, 4 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1820 µg/m³Jul 115 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar8Good
Apr7Good
May6Good
Jun5Good
Jul4Good
Aug8Good
Sep22Moderate
Oct14Moderate
Nov7Good
Dec7Good
Location & terrain

Where is Goiás?

Goiás sits at 15.9°S, 50.1°W, 496 m above sea level, in Brazil. The nearest listed city is Itaberaí, 37 km away.

Topography around Goiás

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

Within 3 km, the terrain around Goiás has significant variations in elevation — a maximum elevation change of 402 m around an average of 556 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 676 m; within 80 km, large variations in elevation — a maximum elevation change of 858 m.

The land around Goiás is covered by trees (69%) within 3 km, trees (48%) and grassland (41%) within 16 km, and grassland (50%), trees (25%) and cropland (23%) within 80 km.

3 km
402 m
16 km
676 m
80 km
858 m
treesshrubsgrasslandcroplandartificial surfaces
May weather nearby: Itaberaí 37 km · Itapuranga 46 km · Anicuns 62 km · São Luís de Montes Belos 70 km · Jussara 78 km · Inhumas 83 km · Jaraguá 88 km · Ceres 91 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 Goiás (-15.9344°, -50.1403°, elevation 496 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).