Rio Bananal weather in September

In September, Rio Bananal sees average daytime highs of 28°C and overnight lows near 19°C, with 33 mm of rain across 7.4 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 24% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 36 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Rio Bananal's 6th-clearest and 2nd-windiest month. For the whole year in context, see Rio Bananal's year-round climate.

Daytime high
28°
8th warmest
Overnight low
19°
4th coldest
Rainfall
33 mm
7.4 wet days
Daylight
11 h 54 min
6:39 AM – 6:32 PM
Cloud cover
60%
6th clearest
Wind
10 km/h
2nd windiest
Solar energy
4.65 kWh/m²
Travel score
6.3
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical September day in Rio Bananal reaches about 28°C in the afternoon and slips back to 19°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 32°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12818
22818
32818
42818
52818
62818
72818
82818
92819
102819
112819
122819
132819
142819
152819
162819
172819
182819
192819
202819
212819
222819
232819
242819
252819
262819
272819
282920
292920
302920

How September really feels in Rio Bananal

Once humidity and wind are folded in, September 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

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Rio Bananal weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°13914.8133.9
Feb32° / 23°9013.112.73.7
Mar31° / 22°13716.312.13.8
Apr30° / 21°791311.64.7
May28° / 19°387.811.16.4
Jun27° / 18°246.510.97.1
Jul27° / 17°266.9117.1
Aug27° / 17°206.811.37.0
Sep28° / 19°337.411.96.3
Oct29° / 20°8510.412.45.3
Nov29° / 21°18117.712.94.3
Dec30° / 22°19016.913.13.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 24% of September, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25842
35842
45842
55842
65644
75644
85545
95446
105446
115248
125149
135050
144951
154852
164852
174753
184654
194555
204456
214456
224357
234258
244159
254159
264060
273961
283862
293862
303862

Chance of precipitation in September

Any precipitation

Rio Bananal gets around 33 mm of rain over 7.4 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 25% and peaks near 27% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
121
221
321
422
522
622
723
823
924
1024
1124
1225
1325
1426
1526
1626
1726
1827
1927
2027
2126
2226
2326
2426
2526
2626
2726
2826
2927
3027

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 55% of days. Sticky, muggy-or-worse air turns up on roughly 58% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
111139481
211139481
311139481
411139481
511139481
611139481
711139491
801139491
901038511
1001038511
1101037521
120936541
130936532
140835552
150734572
160734572
171733563
181632583
191631593
201631593
211630594
221629604
231628614
241628605
252627605
262626615
272626606
282625616
292624626
302624617

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 10 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
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 36 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over September. Sunrise moves from 6:53 AM to 6:26 AM, and sunset from 6:29 PM to 6:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:536:29
211.66:526:30
311.76:516:30
411.76:506:30
511.76:496:30
611.76:486:31
711.76:476:31
811.76:466:31
911.86:456:31
1011.86:446:31
1111.86:446:31
1211.86:436:32
1311.86:426:32
1411.96:416:32
1511.96:406:32
1611.96:396:32
1711.96:386:33
1811.96:376:33
1911.96:366:33
2012.06:356:33
2112.06:346:33
2212.06:336:34
2312.06:326:34
2412.06:316:34
2512.16:316:34
2612.16:306:34
2712.16:296:35
2812.16:286:35
2912.16:276:35
3012.26:266:35

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.65 kWh/m².

For context, solar energy here swings from a low near 3.47 kWh/m² to a high of 6.03 kWh/m² in February across the year — September's 4.65 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.5Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Hazard calendar for Rio Bananal

In seasonPeak

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

Rio Bananal's rainy season runs November–March, when most of the year's rain falls.

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

Is September a good time to visit Rio Bananal?

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

6.3
Sightseeing
5th-best month of the year
7.2
Beach & pool
4th-best month of the year

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

What to pack for Rio Bananal in September

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

In September, Rio Bananal sees daytime highs around 28°C and nights near 19°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

Sea temperature near Rio Bananal in September

The nearest coast averages about 24°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 63 km away) is warmest in March at about 27°C and coldest in August near 23°C.

The water stays above 20°C all year — warm enough for a swim any month.

22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr27Warm
May25Warm
Jun24Warm
Jul24Refreshing
Aug23Refreshing
Sep24Refreshing
Oct24Warm
Nov25Warm
Dec26Warm

UV index in Rio Bananal in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rio Bananal peaks around February 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeFeb 14UV 15Jun 19UV 7
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May7Very high
Jun7High
Jul7High
Aug9Very high
Sep10Extreme
Oct12Extreme
Nov14Extreme
Dec13Extreme
Location & terrain

Where is Rio Bananal?

Rio Bananal sits at 19.3°S, 40.3°W, 70 m above sea level, in Brazil. The nearest listed city is Sooretama, 26 km away.

Topography around Rio Bananal

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

Within 3 km, the terrain around Rio Bananal has significant variations in elevation — a maximum elevation change of 334 m around an average of 127 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 675 m; within 80 km, large variations in elevation — a maximum elevation change of 1,071 m.

The land around Rio Bananal is covered by trees (48%) and grassland (47%) within 3 km, trees (56%) and grassland (42%) within 16 km, and grassland (46%) and trees (41%) within 80 km.

3 km
334 m
16 km
675 m
80 km
1,071 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Sooretama 26 km · Linhares 31 km · São Gabriel da Palha 35 km · Colatina 44 km · Jaguaré 48 km · Pancas 55 km · Nova Venécia 62 km · Aracruz 62 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 Rio Bananal (-19.265°, -40.3333°, elevation 70 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).