Porto Calvo weather in September

In September, Porto Calvo sees average daytime highs of 28°C and overnight lows near 21°C, with 58 mm of rain across 17.6 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 8th-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 21% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Porto Calvo's 1st-clearest and 4th-windiest month. For the whole year in context, see Porto Calvo's year-round climate.

Daytime high
28°
9th warmest
Overnight low
21°
3rd coldest
Rainfall
58 mm
17.6 wet days
Daylight
12 hours
5:17 AM – 5:14 PM
Cloud cover
53%
1st clearest
Wind
9 km/h
4th windiest
Solar energy
5.26 kWh/m²
Travel score
5.3
out of 10

Porto Calvo is former frequesia and town of the Pernambuco Captaincy, actual old town of Porto Calvo, Alagoas.

Founded
1575

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 28°C through the month.

A typical September day in Porto Calvo reaches about 28°C in the afternoon and slips back to 21°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 29°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12721
22721
32721
42721
52721
62721
72721
82721
92721
102721
112721
122721
132721
142721
152721
162721
172821
182821
192821
202821
212821
222821
232821
242821
252821
262821
272821
282821
292821
302821

How September really feels in Porto Calvo

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.

Porto Calvo weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°5817.412.54.0
Feb31° / 23°6416.712.33.8
Mar31° / 24°8019.812.13.7
Apr30° / 23°962111.83.8
May28° / 23°12223.611.64.1
Jun27° / 22°14025.311.54.2
Jul26° / 21°12825.311.54.4
Aug27° / 21°8322.211.74.8
Sep28° / 21°5817.611.95.3
Oct29° / 22°421512.25.1
Nov30° / 23°3112.112.44.8
Dec31° / 23°3312.712.54.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 46% of September, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16436
26436
36337
46337
56337
66337
76238
86337
96337
106337
116337
126436
136436
146535
156535
166535
176634
186733
196733
206931
216931
227030
237030
247129
257228
267228
277327
287327
297228
307228

Chance of precipitation in September

Any precipitation

Porto Calvo gets around 58 mm of rain over 17.6 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 59% and peaks near 69% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
169
269
368
468
568
667
767
866
966
1065
1165
1264
1363
1462
1561
1660
1759
1858
1956
2055
2153
2252
2351
2449
2548
2647
2747
2846
2946
3046

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 75% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
137720
237720
337621
437621
537621
637522
737522
837522
937522
1037522
1137522
1237522
1337522
1437621
1537621
1627721
1727820
1827820
1927721
2027721
2127721
2217722
2317722
2417623
2517524
2617425
2717326
2817227
2917128
3017029

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 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
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 48 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 18 minutes over September. Sunrise moves from 5:27 AM to 5:09 AM, and sunset from 5:16 PM to 5:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.85:275:16
211.85:265:16
311.85:255:16
411.85:255:16
511.95:245:16
611.95:245:16
711.95:235:15
811.95:225:15
911.95:225:15
1011.95:215:15
1111.95:215:15
1211.95:205:15
1311.95:195:15
1411.95:195:15
1511.95:185:15
1612.05:175:14
1712.05:175:14
1812.05:165:14
1912.05:165:14
2012.05:155:14
2112.05:145:14
2212.05:145:14
2312.05:135:14
2412.05:125:14
2512.05:125:13
2612.05:115:13
2712.05:115:13
2812.15:105:13
2912.15:095:13
3012.15:095:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.26 kWh/m².

For context, solar energy here swings from a low near 3.91 kWh/m² to a high of 6.02 kWh/m² in November across the year — September's 5.26 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.1Bright
105.1Bright
115.1Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.4Bright
215.4Bright
225.4Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
Planning a trip in September

Hazard calendar for Porto Calvo

In seasonPeak

None of Porto Calvo'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 Calvo's rainy season runs February–August, 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 Porto Calvo?

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

5.3
Sightseeing
1st-best month of the year
5.6
Beach & pool
5th-best month of the year

September is a reasonable time to visit Porto Calvo for sightseeing.

What to pack for Porto Calvo in September

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

In September, Porto Calvo sees daytime highs around 28°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

Sea temperature near Porto Calvo in September

The nearest coast averages about 26°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 31 km away) is warmest in April at about 29°C and coldest in August near 26°C.

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

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb28Tropical
Mar29Tropical
Apr29Tropical
May28Tropical
Jun27Warm
Jul26Warm
Aug26Warm
Sep26Warm
Oct27Warm
Nov27Warm
Dec27Warm

UV index in Porto Calvo 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 Porto Calvo peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 10 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 12UV 15Aug 10UV 9
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug9Very high
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is Porto Calvo?

Porto Calvo sits at 9.0°S, 35.4°W, 20 m above sea level, in Brazil. The nearest listed city is Matriz de Camaragibe, 19 km away.

Topography around Porto Calvo

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

Within 3 km, the terrain around Porto Calvo has only modest variations in elevation — a maximum elevation change of 111 m around an average of 24 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 159 m; within 80 km, large variations in elevation — a maximum elevation change of 853 m.

The land around Porto Calvo is covered by grassland (80%) within 3 km, grassland (65%) and trees (27%) within 16 km, and grassland (43%), water (31%) and trees (20%) within 80 km.

3 km
111 m
16 km
159 m
80 km
853 m
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
September weather nearby: Matriz de Camaragibe 19 km · Maragogi 20 km · São José da Coroa Grande 32 km · Barreiros 34 km · São Luís do Quitunde 35 km · Colônia Leopoldina 39 km · Joaquim Gomes 40 km · Água Preta 40 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 Calvo (-9.045°, -35.3983°, elevation 20 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).