Itapoã weather in September

In September, Itapoã sees average daytime highs of 30°C and overnight lows near 18°C, with 28 mm of rain across 4.9 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 30°C through the month. The sky is clear or mostly clear about 51% 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 Itapoã's 4th-clearest and 3rd-windiest month. For the whole year in context, see Itapoã's year-round climate.

Daytime high
30°
1st warmest
Overnight low
18°
5th coldest
Rainfall
28 mm
4.9 wet days
Daylight
11 h 54 min
7:08 AM – 7:03 PM
Cloud cover
41%
4th clearest
Wind
9 km/h
3rd windiest
Solar energy
6.14 kWh/m²
Travel score
5.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Itapoã reaches about 30°C in the afternoon and slips back to 18°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 33°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13017
23017
33017
43017
53017
63017
73017
83017
93017
103017
113017
123018
133018
143018
153018
163018
173018
183018
193018
203018
213018
223018
233018
243018
253018
263018
273019
283019
293019
303019

Itapoã 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
Jan27° / 19°1932212.84.5
Feb27° / 19°16518.612.54.7
Mar27° / 19°17820.612.14.8
Apr28° / 18°7412.311.76.1
May27° / 16°163.611.37.6
Jun26° / 15°40.611.18.5
Jul27° / 14°0011.28.7
Aug28° / 15°51.311.57.7
Sep30° / 18°284.911.95.8
Oct30° / 19°10313.712.44.7
Nov28° / 19°20121.612.74.4
Dec27° / 19°21822.712.94.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% 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 (%)
18317
28218
38119
48119
58020
68020
78020
87822
97822
107822
117723
127624
137525
147525
157327
167327
177228
187030
196931
206931
216733
226634
236436
246337
256238
266040
276040
285941
295941
305842

Chance of precipitation in September

Any precipitation

Itapoã gets around 28 mm of rain over 4.9 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 17% and peaks near 32% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
18
28
38
48
58
68
78
88
99
109
1110
1211
1312
1413
1514
1615
1716
1818
1919
2021
2122
2223
2325
2426
2527
2629
2730
2830
2931
3032

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 61% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1791560
2791560
3791560
4791560
5791560
6781570
7781570
8771670
9761680
10761680
11741790
127317100
137118101
146919111
156720121
166521131
176222151
186023161
195624182
205524192
215225212
224925233
234626253
244426273
254126294
263926304
273726325
283626345
293426355
303325366

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
149calm
159calm
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 7:20 AM to 6:57 AM, and sunset from 7:01 PM to 7:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.77:207:01
211.77:197:02
311.77:197:02
411.77:187:02
511.77:177:02
611.87:167:02
711.87:157:02
811.87:157:02
911.87:147:02
1011.87:137:02
1111.87:127:02
1211.97:117:02
1311.97:107:03
1411.97:107:03
1511.97:097:03
1611.97:087:03
1711.97:077:03
1811.97:067:03
1912.07:067:03
2012.07:057:03
2112.07:047:03
2212.07:037:03
2312.07:027:03
2412.07:017:03
2512.07:017:04
2612.17:007:04
2712.16:597:04
2812.16:587:04
2912.16:577:04
3012.16:577:04

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.14 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.66 kWh/m² to a high of 6.14 kWh/m² in September across the year — September's 6.14 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.1Intense
46.1Intense
56.1Intense
66.1Intense
76.1Intense
86.2Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.2Intense
146.2Intense
156.2Intense
166.2Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.1Intense
266.1Intense
276.1Intense
286.1Intense
296.1Intense
306.1Intense
Planning a trip in September

Hazard calendar for Itapoã

In seasonPeak

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

Itapoã'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 Itapoã?

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

5.8
Sightseeing
6th-best month of the year
7.9
Beach & pool
4th-best month of the year

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

What to pack for Itapoã in September

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

In September, Itapoã sees daytime highs around 30°C and nights near 18°C. Pack light clothes and sun protection. About 5 days see rain.

light clothessun protection

UV index in Itapoã in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Itapoã peaks around February 16 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 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 16UV 16Jun 23UV 8
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar15Extreme
Apr12Extreme
May10Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep13Extreme
Oct13Extreme
Nov14Extreme
Dec13Extreme

Air quality in Itapoã 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 Itapoã is worst in September — around 32 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (January, 11 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateSep 1830 µg/m³Jan 1511 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar15Moderate
Apr14Moderate
May15Moderate
Jun13Moderate
Jul13Moderate
Aug15Moderate
Sep32Moderate
Oct21Moderate
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Itapoã?

Itapoã sits at 15.7°S, 47.8°W, 1,066 m above sea level, in Brazil. The nearest listed city is Paranoá, 3.0 km away.

Topography around Itapoã

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

Within 3 km, the terrain around Itapoã has only modest variations in elevation — a maximum elevation change of 220 m around an average of 1,123 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 421 m; within 80 km, large variations in elevation — a maximum elevation change of 803 m.

The land around Itapoã is covered by artificial surfaces (26%), shrubs (25%) and trees (22%) within 3 km, grassland (36%) and trees (22%) within 16 km, and grassland (34%), trees (26%) and cropland (20%) within 80 km.

3 km
220 m
16 km
421 m
80 km
803 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Paranoá 3.0 km · Lago Norte 10 km · Sobradinho 12 km · Plano Piloto 13 km · Jardim Botânico 14 km · Sobradinho II 15 km · Lago Sul 16 km · São Sebastião 17 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 Itapoã (-15.7494°, -47.7686°, elevation 1,066 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).