Goiânia weather in September

In September, Goiânia sees average daytime highs of 32°C and overnight lows near 20°C, with 30 mm of rain across 5.2 wet days and about 11.9 hours of daylight. It is the 1st-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 53% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Goiânia's 4th-clearest and 3rd-windiest month. For the whole year in context, see Goiânia's year-round climate.

Daytime high
32°
1st warmest
Overnight low
20°
6th coldest
Rainfall
30 mm
5.2 wet days
Daylight
11 h 54 min
7:14 AM – 7:09 PM
Cloud cover
41%
4th clearest
Wind
9 km/h
3rd windiest
Solar energy
5.99 kWh/m²
Travel score
4.4
out of 10

Goiânia is settlement in Brazil.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical September day in Goiânia reaches about 32°C in the afternoon and slips back to 20°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 35°C. Set against its neighbours, September runs about 2°C warmer than August and about 1°C warmer than October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13219
23219
33219
43219
53219
63219
73219
83219
93219
103220
113220
123320
133320
143320
153320
163320
173220
183220
193220
203220
213220
223220
233220
243220
253220
263220
273220
283220
293220
303220

How September really feels in Goiânia

Once humidity and wind are folded in, September averages 29 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
29
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Goiânia weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 20°22422.712.93.9
Feb29° / 20°17220.112.63.9
Mar29° / 20°1782112.14.1
Apr29° / 19°7611.911.65.3
May29° / 17°142.711.26.8
Jun28° / 16°50.9117.4
Jul29° / 16°10.311.17.4
Aug31° / 17°6111.46.0
Sep32° / 20°305.211.94.4
Oct32° / 21°10214.912.43.8
Nov29° / 20°19622.212.83.7
Dec28° / 20°21824.3133.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 28%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18218
28218
38020
48020
58020
68020
78020
87822
97822
107723
117624
127624
137426
147426
157426
167228
177228
187129
197030
206931
216832
226634
236634
246535
256436
266337
276238
286238
296139
306139

Chance of precipitation in September

Any precipitation

Goiânia gets around 30 mm of rain over 5.2 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 18% and peaks near 35% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
17
27
37
47
57
68
78
89
910
1011
1112
1213
1314
1415
1516
1618
1719
1820
1922
2023
2124
2225
2327
2428
2529
2631
2732
2833
2934
3035

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 52% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
17118101
27118101
37118101
47018102
56919102
66819112
76819112
86719113
96619123
106619123
116419134
126220144
136020155
145821165
155522176
165422186
175123197
184923208
194624218
204424239
2141242410
2239252511
2336242713
2434242814
2532242916
2630233017
2728233019
2827223121
2926223122
3025213124

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over September. Sunrise moves from 7:27 AM to 7:02 AM, and sunset from 7:07 PM to 7:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.77:277:07
211.77:267:07
311.77:257:07
411.77:247:07
511.77:237:07
611.77:237:07
711.87:227:08
811.87:217:08
911.87:207:08
1011.87:197:08
1111.87:187:08
1211.87:187:08
1311.97:177:08
1411.97:167:08
1511.97:157:08
1611.97:147:09
1711.97:137:09
1811.97:127:09
1912.07:127:09
2012.07:117:09
2112.07:107:09
2212.07:097:09
2312.07:087:09
2412.07:077:09
2512.17:067:10
2612.17:067:10
2712.17:057:10
2812.17:047:10
2912.17:037:10
3012.17:027:10

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.99 kWh/m².

For context, solar energy here swings from a low near 4.51 kWh/m² to a high of 6.12 kWh/m² in October across the year — September's 5.99 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
65.9Bright
75.9Bright
86.0Bright
96.0Bright
106.0Bright
116.0Bright
126.0Bright
136.0Bright
146.0Bright
156.0Bright
166.0Bright
176.0Bright
186.0Bright
196.0Bright
206.0Bright
216.0Bright
226.0Bright
236.0Bright
246.0Intense
256.0Intense
266.0Intense
276.0Intense
286.0Intense
296.0Intense
306.1Intense
Planning a trip in September

Hazard calendar for Goiânia

In seasonPeak

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

Goiânia's monsoon runs October–March, when most of the year's rain falls.

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

Is September a good time to visit Goiânia?

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

4.4
Sightseeing
6th-best month of the year
7.3
Beach & pool
5th-best month of the year

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

What to pack for Goiânia in September

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

In September, Goiânia sees daytime highs around 32°C and nights near 20°C. Pack light clothes. Worth having: sun protection. About 5 days see rain.

light clothessun protection

UV index in Goiânia in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Goiânia peaks around February 11 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 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 highExtremeFeb 11UV 15Jun 21UV 8
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep12Extreme
Oct13Extreme
Nov14Extreme
Dec14Extreme

Air quality in Goiânia in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Goiânia is worst in September — around 25 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (July, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodSep 1723 µg/m³Jul 1111 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar13Moderate
Apr12Moderate
May12Moderate
Jun11Good
Jul11Good
Aug14Moderate
Sep25Moderate
Oct16Moderate
Nov11Good
Dec11Good
Location & terrain

Where is Goiânia?

Goiânia sits at 16.7°S, 49.3°W, 766 m above sea level, in Brazil. The nearest listed city is Aparecida de Goiânia, 16 km away.

Topography around Goiânia

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

Within 3 km, the terrain around Goiânia has only modest variations in elevation — a maximum elevation change of 143 m around an average of 763 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 296 m; within 80 km, large variations in elevation — a maximum elevation change of 638 m.

The land around Goiânia is covered by artificial surfaces (87%) within 3 km, artificial surfaces (42%) and trees (27%) within 16 km, and cropland (35%), grassland (34%) and trees (27%) within 80 km.

3 km
143 m
16 km
296 m
80 km
638 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Aparecida de Goiânia 16 km · Senador Canedo 17 km · Abadia de Goiás 21 km · Trindade 25 km · Goianira 27 km · Nerópolis 31 km · Hidrolândia 32 km · Guapó 34 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 Goiânia (-16.6786°, -49.2539°, elevation 766 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).