Porto da Folha weather in September

In September, Porto da Folha sees average daytime highs of 30°C and overnight lows near 21°C, with 19 mm of rain across 7.3 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 29°C in the first days to 31°C by the end. The sky is clear or mostly clear about 29% 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 da Folha's 2nd-clearest and 3rd-windiest month. For the whole year in context, see Porto da Folha's year-round climate.

Daytime high: 30°; 9th warmest
Overnight low: 21°; 3rd coldest
Rainfall: 19 mm; 7.3 wet days
Daylight: 11 h 54 min; 5:25 AM – 5:22 PM
Cloud cover: 50%; 2nd clearest
Wind: 12 km/h; 3rd windiest
Solar energy: 5.21 kWh/m²
Travel score: 5.5; out of 10

← August Porto da Folha year-round climate October →Best places to visit in September

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 29°C in the first days to 31°C by the end.

A typical September day in Porto da Folha reaches about 30°C in the afternoon and slips back to 21°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°C cooler than October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	29	29	29	29	29	29	29	29	29	29	29	29	30	30	30	30	30	30	30	30	30	30	31	31	31	31	31	31	31	31
Avg low (°C)	20	20	20	20	20	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21

	Avg high (°C)	Avg low (°C)
1	29	20
2	29	20
3	29	20
4	29	20
5	29	20
6	29	21
7	29	21
8	29	21
9	29	21
10	29	21
11	29	21
12	29	21
13	30	21
14	30	21
15	30	21
16	30	21
17	30	21
18	30	21
19	30	21
20	30	21
21	30	21
22	30	21
23	31	21
24	31	21
25	31	21
26	31	21
27	31	21
28	31	21
29	31	21
30	31	21

How September really feels in Porto da Folha

Once humidity and wind are folded in, September averages 9 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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Porto da Folha weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 10th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	34° / 24°	35	6.7	12.5	3.4
Feb	34° / 24°	36	7.7	12.3	3.4
Mar	33° / 24°	41	9.4	12.1	3.4
Apr	32° / 23°	44	10.5	11.8	3.9
May	30° / 22°	51	13.3	11.6	4.7
Jun	28° / 21°	47	14.3	11.4	5.5
Jul	27° / 20°	39	13.9	11.5	5.9
Aug	28° / 20°	27	10.9	11.7	6.1
Sep	30° / 21°	19	7.3	11.9	5.5
Oct	32° / 22°	17	4.6	12.2	4.6
Nov	33° / 23°	20	4	12.5	3.9
Dec	34° / 23°	18	3.7	12.6	3.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 42% of September, with mostly cloudy or overcast conditions the remaining 29%. Skies tend to open up as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	65	65	65	65	65	65	65	66	66	67	68	68	69	69	71	72	72	73	74	75	75	76	76	76	76	77	77	76	76	76
Cloudier (%)	35	35	35	35	35	35	35	34	34	33	32	32	31	31	29	28	28	27	26	25	25	24	24	24	24	23	23	24	24	24

	Clearer (%)	Cloudier (%)
1	65	35
2	65	35
3	65	35
4	65	35
5	65	35
6	65	35
7	65	35
8	66	34
9	66	34
10	67	33
11	68	32
12	68	32
13	69	31
14	69	31
15	71	29
16	72	28
17	72	28
18	73	27
19	74	26
20	75	25
21	75	25
22	76	24
23	76	24
24	76	24
25	76	24
26	77	23
27	77	23
28	76	24
29	76	24
30	76	24

Chance of precipitation in September

Any precipitation

Porto da Folha gets around 19 mm of rain over 7.3 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 24% and peaks near 29% on the wettest days. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	27	27	27	28	28	28	29	29	29	29	29	29	28	28	27	26	26	24	23	22	21	20	19	18	17	16	16	15	15	15

	Rain chance (%)
1	27
2	27
3	27
4	28
5	28
6	28
7	29
8	29
9	29
10	29
11	29
12	29
13	28
14	28
15	27
16	26
17	26
18	24
19	23
20	22
21	21
22	20
23	19
24	18
25	17
26	16
27	16
28	15
29	15
30	15

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 88% of days. Sticky, muggy-or-worse air turns up on roughly 91% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Humid (%)	10	10	10	10	11	11	11	11	11	11	11	10	10	10	10	10	10	9	9	9	8	8	7	7	6	6	6	5	5	5
Muggy (%)	88	88	88	88	87	87	87	87	86	86	86	87	87	87	87	87	87	88	88	87	88	88	89	89	90	90	90	91	90	90
Oppressive (%)	2	2	2	2	2	2	2	2	3	3	3	3	3	3	3	3	3	3	3	4	4	4	4	4	4	4	4	4	5	5

	Humid (%)	Muggy (%)	Oppressive (%)
1	10	88	2
2	10	88	2
3	10	88	2
4	10	88	2
5	11	87	2
6	11	87	2
7	11	87	2
8	11	87	2
9	11	86	3
10	11	86	3
11	11	86	3
12	10	87	3
13	10	87	3
14	10	87	3
15	10	87	3
16	10	87	3
17	10	87	3
18	9	88	3
19	9	88	3
20	9	87	4
21	8	88	4
22	8	88	4
23	7	89	4
24	7	89	4
25	6	90	4
26	6	90	4
27	6	90	4
28	5	91	4
29	5	90	5
30	5	90	5

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	13	13	13	13
Feels	calm	calm	calm	calm	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	12	calm
2	12	calm
3	12	calm
4	12	calm
5	12	light breeze
6	12	light breeze
7	12	light breeze
8	12	light breeze
9	12	light breeze
10	12	light breeze
11	12	light breeze
12	12	light breeze
13	12	light breeze
14	12	light breeze
15	12	light breeze
16	12	light breeze
17	12	light breeze
18	12	light breeze
19	12	light breeze
20	12	light breeze
21	12	light breeze
22	12	light breeze
23	12	light breeze
24	12	light breeze
25	12	light breeze
26	12	light breeze
27	13	light breeze
28	13	light breeze
29	13	light breeze
30	13	light breeze

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 5:35 AM to 5:16 AM, and sunset from 5:23 PM to 5:21 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	11.8	11.8	11.8	11.8	11.8	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.1	12.1	12.1
Sunrise (AM)	5:35	5:34	5:33	5:33	5:32	5:32	5:31	5:30	5:30	5:29	5:28	5:28	5:27	5:26	5:26	5:25	5:24	5:24	5:23	5:22	5:22	5:21	5:21	5:20	5:19	5:19	5:18	5:17	5:17	5:16
Sunset (PM)	5:23	5:23	5:23	5:23	5:23	5:23	5:23	5:23	5:22	5:22	5:22	5:22	5:22	5:22	5:22	5:22	5:22	5:22	5:22	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:21

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.8	5:35	5:23
2	11.8	5:34	5:23
3	11.8	5:33	5:23
4	11.8	5:33	5:23
5	11.8	5:32	5:23
6	11.9	5:32	5:23
7	11.9	5:31	5:23
8	11.9	5:30	5:23
9	11.9	5:30	5:22
10	11.9	5:29	5:22
11	11.9	5:28	5:22
12	11.9	5:28	5:22
13	11.9	5:27	5:22
14	11.9	5:26	5:22
15	11.9	5:26	5:22
16	11.9	5:25	5:22
17	12.0	5:24	5:22
18	12.0	5:24	5:22
19	12.0	5:23	5:22
20	12.0	5:22	5:21
21	12.0	5:22	5:21
22	12.0	5:21	5:21
23	12.0	5:21	5:21
24	12.0	5:20	5:21
25	12.0	5:19	5:21
26	12.0	5:19	5:21
27	12.0	5:18	5:21
28	12.1	5:17	5:21
29	12.1	5:17	5:21
30	12.1	5:16	5:21

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.21 kWh/m².

For context, solar energy here swings from a low near 3.84 kWh/m² to a high of 6.32 kWh/m² in December across the year — September's 5.21 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	4.8	4.8	4.8	4.9	4.9	4.9	4.9	5.0	5.0	5.0	5.0	5.1	5.1	5.1	5.2	5.2	5.2	5.3	5.3	5.4	5.4	5.4	5.5	5.5	5.5	5.6	5.6	5.6	5.6	5.7
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.8	Bright
2	4.8	Bright
3	4.8	Bright
4	4.9	Bright
5	4.9	Bright
6	4.9	Bright
7	4.9	Bright
8	5.0	Bright
9	5.0	Bright
10	5.0	Bright
11	5.0	Bright
12	5.1	Bright
13	5.1	Bright
14	5.1	Bright
15	5.2	Bright
16	5.2	Bright
17	5.2	Bright
18	5.3	Bright
19	5.3	Bright
20	5.4	Bright
21	5.4	Bright
22	5.4	Bright
23	5.5	Bright
24	5.5	Bright
25	5.5	Bright
26	5.6	Bright
27	5.6	Bright
28	5.6	Bright
29	5.6	Bright
30	5.7	Bright

Planning a trip in September

Is September a good time to visit Porto da Folha?

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

5.5

Sightseeing

3rd-best month of the year

7.4

Beach & pool

1st-best month of the year

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

What to pack for Porto da Folha in September

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

In September, Porto da Folha sees daytime highs around 30°C and nights near 21°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Porto da Folha in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (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 da Folha peaks around February 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 9 (very high).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	14	15	14	13	10	9	9	10	11	12	13	12
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Very high	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	15	Extreme
Mar	14	Extreme
Apr	13	Extreme
May	10	Extreme
Jun	9	Very high
Jul	9	Very high
Aug	10	Very high
Sep	11	Extreme
Oct	12	Extreme
Nov	13	Extreme
Dec	12	Extreme

Location & terrain

Where is Porto da Folha?

Porto da Folha sits at 9.9°S, 37.3°W, 42 m above sea level, in Brazil. The nearest listed city is Pão de Açúcar, 26 km away.

Topography around Porto da Folha

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

Within 3 km, the terrain around Porto da Folha has only modest variations in elevation — a maximum elevation change of 180 m around an average of 60 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 358 m; within 80 km, large variations in elevation — a maximum elevation change of 812 m.

The land around Porto da Folha is covered by grassland (70%) within 3 km, grassland (54%) and shrubs (27%) within 16 km, and grassland (67%) within 80 km.

3 km

180 m

grassland 70%

16 km

358 m

grassland 54%

80 km

812 m

grassland 67%

treesshrubsgrasslandcroplandartificial surfaceswaterwetland

← August Porto da Folha year-round climate October →Best places to visit in September

September weather nearby: Pão de Açúcar 26 km · Traipu 31 km · Batalha 31 km · Nossa Senhora da Glória 37 km · São José da Tapera 41 km · Olho d'Água das Flores 42 km · Poço Redondo 46 km · Girau do Ponciano 49 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

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 da Folha (-9.9172°, -37.2783°, elevation 42 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	29	20
2	29	20
3	29	20
4	29	20
5	29	20
6	29	21
7	29	21
8	29	21
9	29	21
10	29	21
11	29	21
12	29	21
13	30	21
14	30	21
15	30	21
16	30	21
17	30	21
18	30	21
19	30	21
20	30	21
21	30	21
22	30	21
23	31	21
24	31	21
25	31	21
26	31	21
27	31	21
28	31	21
29	31	21
30	31	21

	Clearer (%)	Cloudier (%)
1	65	35
2	65	35
3	65	35
4	65	35
5	65	35
6	65	35
7	65	35
8	66	34
9	66	34
10	67	33
11	68	32
12	68	32
13	69	31
14	69	31
15	71	29
16	72	28
17	72	28
18	73	27
19	74	26
20	75	25
21	75	25
22	76	24
23	76	24
24	76	24
25	76	24
26	77	23
27	77	23
28	76	24
29	76	24
30	76	24

	Rain chance (%)
1	27
2	27
3	27
4	28
5	28
6	28
7	29
8	29
9	29
10	29
11	29
12	29
13	28
14	28
15	27
16	26
17	26
18	24
19	23
20	22
21	21
22	20
23	19
24	18
25	17
26	16
27	16
28	15
29	15
30	15

	Humid (%)	Muggy (%)	Oppressive (%)
1	10	88	2
2	10	88	2
3	10	88	2
4	10	88	2
5	11	87	2
6	11	87	2
7	11	87	2
8	11	87	2
9	11	86	3
10	11	86	3
11	11	86	3
12	10	87	3
13	10	87	3
14	10	87	3
15	10	87	3
16	10	87	3
17	10	87	3
18	9	88	3
19	9	88	3
20	9	87	4
21	8	88	4
22	8	88	4
23	7	89	4
24	7	89	4
25	6	90	4
26	6	90	4
27	6	90	4
28	5	91	4
29	5	90	5
30	5	90	5

	Avg high (°C)	Avg low (°C)
1	29	20
2	29	20
3	29	20
4	29	20
5	29	20
6	29	21
7	29	21
8	29	21
9	29	21
10	29	21
11	29	21
12	29	21
13	30	21
14	30	21
15	30	21
16	30	21
17	30	21
18	30	21
19	30	21
20	30	21
21	30	21
22	30	21
23	31	21
24	31	21
25	31	21
26	31	21
27	31	21
28	31	21
29	31	21
30	31	21

	Clearer (%)	Cloudier (%)
1	65	35
2	65	35
3	65	35
4	65	35
5	65	35
6	65	35
7	65	35
8	66	34
9	66	34
10	67	33
11	68	32
12	68	32
13	69	31
14	69	31
15	71	29
16	72	28
17	72	28
18	73	27
19	74	26
20	75	25
21	75	25
22	76	24
23	76	24
24	76	24
25	76	24
26	77	23
27	77	23
28	76	24
29	76	24
30	76	24

	Rain chance (%)
1	27
2	27
3	27
4	28
5	28
6	28
7	29
8	29
9	29
10	29
11	29
12	29
13	28
14	28
15	27
16	26
17	26
18	24
19	23
20	22
21	21
22	20
23	19
24	18
25	17
26	16
27	16
28	15
29	15
30	15

	Humid (%)	Muggy (%)	Oppressive (%)
1	10	88	2
2	10	88	2
3	10	88	2
4	10	88	2
5	11	87	2
6	11	87	2
7	11	87	2
8	11	87	2
9	11	86	3
10	11	86	3
11	11	86	3
12	10	87	3
13	10	87	3
14	10	87	3
15	10	87	3
16	10	87	3
17	10	87	3
18	9	88	3
19	9	88	3
20	9	87	4
21	8	88	4
22	8	88	4
23	7	89	4
24	7	89	4
25	6	90	4
26	6	90	4
27	6	90	4
28	5	91	4
29	5	90	5
30	5	90	5

	Avg high (°C)	Avg low (°C)
1	29	20
2	29	20
3	29	20
4	29	20
5	29	20
6	29	21
7	29	21
8	29	21
9	29	21
10	29	21
11	29	21
12	29	21
13	30	21
14	30	21
15	30	21
16	30	21
17	30	21
18	30	21
19	30	21
20	30	21
21	30	21
22	30	21
23	31	21
24	31	21
25	31	21
26	31	21
27	31	21
28	31	21
29	31	21
30	31	21

	Clearer (%)	Cloudier (%)
1	65	35
2	65	35
3	65	35
4	65	35
5	65	35
6	65	35
7	65	35
8	66	34
9	66	34
10	67	33
11	68	32
12	68	32
13	69	31
14	69	31
15	71	29
16	72	28
17	72	28
18	73	27
19	74	26
20	75	25
21	75	25
22	76	24
23	76	24
24	76	24
25	76	24
26	77	23
27	77	23
28	76	24
29	76	24
30	76	24

	Rain chance (%)
1	27
2	27
3	27
4	28
5	28
6	28
7	29
8	29
9	29
10	29
11	29
12	29
13	28
14	28
15	27
16	26
17	26
18	24
19	23
20	22
21	21
22	20
23	19
24	18
25	17
26	16
27	16
28	15
29	15
30	15

	Humid (%)	Muggy (%)	Oppressive (%)
1	10	88	2
2	10	88	2
3	10	88	2
4	10	88	2
5	11	87	2
6	11	87	2
7	11	87	2
8	11	87	2
9	11	86	3
10	11	86	3
11	11	86	3
12	10	87	3
13	10	87	3
14	10	87	3
15	10	87	3
16	10	87	3
17	10	87	3
18	9	88	3
19	9	88	3
20	9	87	4
21	8	88	4
22	8	88	4
23	7	89	4
24	7	89	4
25	6	90	4
26	6	90	4
27	6	90	4
28	5	91	4
29	5	90	5
30	5	90	5