Porto Real weather in September

In September, Porto Real sees average daytime highs of 26°C and overnight lows near 16°C, with 69 mm of rain across 10.7 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 35% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 11 h 30 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Porto Real's 6th-clearest and 1st-windiest month. For the whole year in context, see Porto Real's year-round climate.

Daytime high
26°
8th warmest
Overnight low
16°
5th coldest
Rainfall
69 mm
10.7 wet days
Daylight
11 h 54 min
6:55 AM – 6:48 PM
Cloud cover
58%
6th clearest
Wind
6 km/h
1st windiest
Solar energy
4.67 kWh/m²
Travel score
6.6
out of 10

Porto Real is human settlement in Brazil.

Air quality
Excellent
PM10 9.7 µg/m³ · 2019

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 26°C through the month.

A typical September day in Porto Real reaches about 26°C in the afternoon and slips back to 16°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 31°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12615
22615
32615
42615
52615
62615
72615
82615
92615
102615
112615
122615
132615
142616
152616
162616
172616
182616
192616
202616
212616
222616
232616
242616
252616
262616
272616
282616
292616
302616

Porto Real weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 20°28222.113.23.9
Feb29° / 20°20517.512.84.2
Mar28° / 19°19420.212.24.6
Apr27° / 18°8611.711.56.2
May25° / 15°488.410.97.2
Jun24° / 14°275.310.77.9
Jul24° / 13°285.310.88.0
Aug25° / 14°275.311.27.8
Sep26° / 16°6910.711.96.6
Oct27° / 17°11714.712.55.7
Nov27° / 18°2041913.14.9
Dec28° / 20°24921.313.34.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% 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 (%)
16139
26040
36040
45941
55842
65743
75644
85545
95446
105347
115248
125149
134951
144852
154753
164654
174555
184456
194258
204159
214060
223961
233862
243763
253763
263664
273664
283565
293466
303367

Chance of precipitation in September

Any precipitation

Porto Real gets around 69 mm of rain over 10.7 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 35% and peaks near 45% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
126
227
327
428
529
630
730
831
931
1032
1132
1232
1332
1433
1533
1634
1734
1835
1936
2037
2138
2239
2340
2441
2542
2642
2743
2844
2945
3045

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 40% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12547271
22447271
32347281
42347291
52247291
62247301
72146312
82046322
92045332
101945352
111844362
121744373
131643383
141543393
151442394
161442404
171341415
181340426
191239426
201238437
211237438
2211364310
2311354311
2410354312
2510344313
2610334314
2710324316
289314317
299304318
309294319

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 30 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 42 minutes over September. Sunrise moves from 7:10 AM to 6:41 AM, and sunset from 6:43 PM to 6:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:106:43
211.67:106:44
311.67:096:44
411.67:086:44
511.67:076:44
611.77:066:45
711.77:056:45
811.77:046:45
911.77:036:46
1011.77:016:46
1111.87:006:46
1211.86:596:46
1311.86:586:47
1411.86:576:47
1511.96:566:47
1611.96:556:48
1711.96:546:48
1811.96:536:48
1911.96:526:49
2012.06:516:49
2112.06:506:49
2212.06:496:49
2312.06:486:50
2412.06:476:50
2512.16:466:50
2612.16:456:51
2712.16:446:51
2812.16:436:51
2912.26:426:52
3012.26:416:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.67 kWh/m².

For context, solar energy here swings from a low near 3.47 kWh/m² to a high of 5.62 kWh/m² in February across the year — September's 4.67 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.7Bright
114.7Bright
124.7Bright
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 Porto Real

In seasonPeak

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

Porto Real'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 September a good time to visit Porto Real?

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

6.6
Sightseeing
5th-best month of the year
6.3
Beach & pool
5th-best month of the year

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

What to pack for Porto Real in September

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

In September, Porto Real sees daytime highs around 26°C and nights near 16°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

UV index in Porto Real in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Porto Real peaks around February 9 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 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 highExtremeFeb 9UV 15Jul 11UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7Very high
Jun6High
Jul6High
Aug8Very high
Sep7Very high
Oct12Extreme
Nov14Extreme
Dec14Extreme

Air quality in Porto Real 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 Porto Real is worst in September — around 33 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 15 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 1332 µg/m³Dec 2115 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb16Moderate
Mar17Moderate
Apr19Moderate
May24Moderate
Jun29Moderate
Jul31Moderate
Aug27Moderate
Sep33Moderate
Oct20Moderate
Nov17Moderate
Dec15Moderate
Location & terrain

Where is Porto Real?

Porto Real sits at 22.4°S, 44.3°W, 392 m above sea level, in Brazil. The nearest listed city is Resende, 17 km away.

Topography around Porto Real

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

Within 3 km, the terrain around Porto Real has only modest variations in elevation — a maximum elevation change of 154 m around an average of 404 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,065 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,761 m.

The land around Porto Real is covered by grassland (66%) within 3 km, grassland (59%) and trees (37%) within 16 km, and trees (50%) and grassland (42%) within 80 km.

3 km
154 m
16 km
1,065 m
80 km
2,761 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Resende 17 km · Barra Mansa 18 km · Volta Redonda 22 km · Itatiaia 29 km · Pinheiral 32 km · Rio Claro 37 km · Piraí 47 km · Barra do Piraí 48 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 Porto Real (-22.4197°, -44.2903°, elevation 392 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).