Sumidouro weather in September

In September, Sumidouro sees average daytime highs of 25°C and overnight lows near 15°C, with 69 mm of rain across 9.5 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 34% of the time in September, and the air most often feels comfortable.

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 Sumidouro's 5th-clearest and 1st-windiest month. For the whole year in context, see Sumidouro's year-round climate.

Daytime high
25°
8th warmest
Overnight low
15°
5th coldest
Rainfall
69 mm
9.5 wet days
Daylight
11 h 54 min
6:49 AM – 6:41 PM
Cloud cover
58%
5th clearest
Wind
6 km/h
1st windiest
Solar energy
4.72 kWh/m²
Travel score
7.0
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 25°C through the month.

A typical September day in Sumidouro reaches about 25°C in the afternoon and slips back to 15°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 29°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12414
22514
32514
42515
52515
62515
72515
82515
92515
102515
112515
122515
132515
142515
152515
162515
172515
182516
192516
202516
212516
222516
232516
242516
252516
262516
272516
282516
292516
302516

Sumidouro weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 20°24119.213.24.8
Feb28° / 19°14214.312.84.9
Mar28° / 19°14317.412.25.2
Apr26° / 17°6610.611.56.5
May24° / 15°437117.4
Jun23° / 14°19410.78.0
Jul23° / 13°234.410.88.0
Aug24° / 14°25511.28.0
Sep25° / 15°699.511.97.0
Oct26° / 17°11914.212.55.9
Nov26° / 18°21719.613.14.9
Dec27° / 19°25621.913.34.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16238
26139
36139
45941
55941
65842
75743
85545
95446
105347
115149
125050
134951
144753
154654
164555
174357
184258
194258
204060
213961
223961
233763
243763
253763
263664
273763
283763
293664
303565

Chance of precipitation in September

Any precipitation

Sumidouro gets around 69 mm of rain over 9.5 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 31% and peaks near 43% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
121
221
321
421
522
622
723
823
924
1025
1126
1227
1328
1429
1530
1631
1733
1834
1935
2036
2137
2238
2339
2440
2541
2642
2742
2843
2943
3043

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 45% of days. Sticky, muggy-or-worse air turns up on roughly 5% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12849221
22750231
32750231
42650231
52551231
62550241
72450251
82351251
92251261
102150282
112050292
121949302
131749313
141648323
151648333
161547344
171446354
181445365
191444375
201343386
211342387
221341398
231240398
241239409
2512384010
2612374011
2711364012
2811354113
2911344114
3011334115

Wind in September

Winds average 6 km/h in September, the windiest month of the year.

Across September, 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.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 7:04 AM to 6:35 AM, and sunset from 6:37 PM to 6:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:046:37
211.67:036:37
311.67:026:38
411.67:016:38
511.67:006:38
611.76:596:38
711.76:586:39
811.76:576:39
911.76:566:39
1011.76:556:40
1111.86:546:40
1211.86:536:40
1311.86:526:40
1411.86:516:41
1511.96:506:41
1611.96:496:41
1711.96:486:42
1811.96:476:42
1911.96:466:42
2012.06:456:42
2112.06:446:43
2212.06:436:43
2312.06:426:43
2412.06:416:44
2512.16:406:44
2612.16:396:44
2712.16:386:44
2812.16:376:45
2912.26:366:45
3012.26:356:45

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.72 kWh/m².

For context, solar energy here swings from a low near 3.49 kWh/m² to a high of 5.97 kWh/m² in February across the year — September's 4.72 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.7Bright
144.7Bright
154.7Bright
164.7Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
Planning a trip in September

Hazard calendar for Sumidouro

In seasonPeak

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

Sumidouro'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 Sumidouro?

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

7.0
Sightseeing
5th-best month of the year
6.2
Beach & pool
3rd-best month of the year

September is one of the better times to visit Sumidouro for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Sumidouro in September

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

In September, Sumidouro sees daytime highs around 25°C and nights near 15°C. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

UV index in Sumidouro in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sumidouro peaks around January 24 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 24UV 15Jul 10UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep8Very high
Oct12Extreme
Nov14Extreme
Dec14Extreme

Air quality in Sumidouro 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 Sumidouro is worst in September — around 19 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (January, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1518 µg/m³Jan 1210 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar11Good
Apr12Moderate
May14Moderate
Jun14Moderate
Jul14Moderate
Aug14Moderate
Sep19Moderate
Oct13Moderate
Nov11Good
Dec10Good
Location & terrain

Where is Sumidouro?

Sumidouro sits at 22.0°S, 42.7°W, 366 m above sea level, in Brazil. The nearest listed city is Carmo, 15 km away.

Topography around Sumidouro

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

Within 3 km, the terrain around Sumidouro has large variations in elevation — a maximum elevation change of 658 m around an average of 492 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,230 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,252 m.

The land around Sumidouro is covered by trees (49%) and grassland (49%) within 3 km, grassland (50%) and trees (49%) within 16 km, and trees (49%) and grassland (49%) within 80 km.

3 km
658 m
16 km
1,230 m
80 km
2,252 m
treesgrasslandartificial surfaces
September weather nearby: Carmo 15 km · Além Paraíba 18 km · Sapucaia 25 km · São José do Vale do Rio Preto 28 km · Bom Jardim 29 km · Nova Friburgo 30 km · Cordeiro 32 km · Cantagalo 33 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 Sumidouro (-22.0497°, -42.6747°, elevation 366 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).