Sertânia weather in September

In September, Sertânia sees average daytime highs of 32°C and overnight lows near 19°C, with 2 mm of rain across 0.7 wet days and about 12 hours of daylight. It is the 7th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 31°C in the first days to 33°C by the end. The sky is clear or mostly clear about 56% of the time in September, and the air most often feels humid.

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

Daytime high: 32°; 7th warmest
Overnight low: 19°; 3rd coldest
Rainfall: 2 mm; 0.7 wet days
Daylight: 12 hours; 5:25 AM – 5:22 PM
Cloud cover: 39%; 1st clearest
Wind: 17 km/h; 1st windiest
Solar energy: 6.45 kWh/m²
Travel score: 5.2; out of 10

Sertânia is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← August Sertânia 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 31°C in the first days to 33°C by the end.

A typical September day in Sertânia reaches about 32°C in the afternoon and slips back to 19°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 33°C. Set against its neighbours, September runs about 2°C warmer than August and about 1°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)	31	31	31	31	31	31	31	31	31	31	31	31	31	32	32	32	32	32	32	32	32	32	32	32	33	33	33	33	33	33
Avg low (°C)	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	20

	Avg high (°C)	Avg low (°C)
1	31	19
2	31	19
3	31	19
4	31	19
5	31	19
6	31	19
7	31	19
8	31	19
9	31	19
10	31	19
11	31	19
12	31	19
13	31	19
14	32	19
15	32	19
16	32	19
17	32	19
18	32	19
19	32	19
20	32	19
21	32	19
22	32	19
23	32	19
24	32	19
25	33	19
26	33	19
27	33	19
28	33	19
29	33	19
30	33	20

How September really feels in Sertânia

Once humidity and wind are folded in, September averages 11 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.

Sertânia weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 12th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	33° / 22°	45	6.3	12.4	3.8
Feb	33° / 21°	50	6.9	12.3	3.8
Mar	32° / 22°	66	9.1	12.1	3.9
Apr	31° / 21°	58	8.4	11.8	4.3
May	30° / 20°	40	7.7	11.6	5.2
Jun	29° / 19°	22	5.2	11.5	6.2
Jul	28° / 19°	14	3.9	11.6	6.5
Aug	30° / 18°	7	1.6	11.7	6.2
Sep	32° / 19°	2	0.7	12	5.2
Oct	33° / 20°	5	0.8	12.2	4.3
Nov	33° / 21°	9	1	12.4	4.0
Dec	33° / 21°	14	2	12.5	3.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 23%. 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 (%)	69	69	70	70	70	70	70	70	71	71	71	72	73	74	75	76	77	78	79	81	82	84	85	85	86	86	87	87	86	86
Cloudier (%)	31	31	30	30	30	30	30	30	29	29	29	28	27	26	25	24	23	22	21	19	18	16	15	15	14	14	13	13	14	14

	Clearer (%)	Cloudier (%)
1	69	31
2	69	31
3	70	30
4	70	30
5	70	30
6	70	30
7	70	30
8	70	30
9	71	29
10	71	29
11	71	29
12	72	28
13	73	27
14	74	26
15	75	25
16	76	24
17	77	23
18	78	22
19	79	21
20	81	19
21	82	18
22	84	16
23	85	15
24	85	15
25	86	14
26	86	14
27	87	13
28	87	13
29	86	14
30	86	14

Chance of precipitation in September

Any precipitation

Sertânia gets around 2 mm of rain over 0.7 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 2% and peaks near 3% on the wettest days.

	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 (%)	3	3	3	3	3	3	3	3	3	3	3	3	3	3	2	2	2	2	2	2	2	1	1	1	1	1	1	1	1	1

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

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 52% of days. It rarely turns muggy — the humid and sticky bands barely register.

	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
Dry (%)	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
Comfortable (%)	43	43	43	43	43	43	43	43	43	43	43	44	44	44	45	45	46	47	47	48	48	49	49	49	50	50	51	51	51	50
Humid (%)	55	55	55	55	55	55	55	55	55	55	54	53	53	53	53	53	52	51	51	50	50	50	49	49	49	49	48	48	48	49
Muggy (%)	1	1	1	1	1	1	1	1	1	1	2	2	2	2	1	1	1	1	1	1	1	1	1	1	1	0	0	0	0	0

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	1	43	55	1
2	1	43	55	1
3	1	43	55	1
4	1	43	55	1
5	1	43	55	1
6	1	43	55	1
7	1	43	55	1
8	1	43	55	1
9	1	43	55	1
10	1	43	55	1
11	1	43	54	2
12	1	44	53	2
13	1	44	53	2
14	1	44	53	2
15	1	45	53	1
16	1	45	53	1
17	1	46	52	1
18	1	47	51	1
19	1	47	51	1
20	1	48	50	1
21	1	48	50	1
22	1	49	50	1
23	1	49	49	1
24	1	49	49	1
25	1	50	49	1
26	1	50	49	0
27	1	51	48	0
28	1	51	48	0
29	1	51	48	0
30	1	50	49	0

Wind in September

Winds average 17 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 17 km/h on the calmest days to 17 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)	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17
Feels	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	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	17	light breeze
2	17	light breeze
3	17	light breeze
4	17	light breeze
5	17	light breeze
6	17	light breeze
7	17	light breeze
8	17	light breeze
9	17	light breeze
10	17	light breeze
11	17	light breeze
12	17	light breeze
13	17	light breeze
14	17	light breeze
15	17	light breeze
16	17	light breeze
17	17	light breeze
18	17	light breeze
19	17	light breeze
20	17	light breeze
21	17	light breeze
22	17	light breeze
23	17	light breeze
24	17	light breeze
25	17	light breeze
26	17	light breeze
27	17	light breeze
28	17	light breeze
29	17	light breeze
30	17	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 5:33 AM to 5:16 AM, and sunset from 5:24 PM to 5:20 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	11.9	11.9	11.9	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	12.0	12.0	12.1	12.1
Sunrise (AM)	5:33	5:33	5:32	5:32	5:31	5:31	5:30	5:29	5:29	5:28	5:28	5:27	5:26	5:26	5:25	5:25	5:24	5:23	5:23	5:22	5:22	5:21	5:21	5:20	5:19	5:19	5:18	5:18	5:17	5:16
Sunset (PM)	5:24	5:24	5:24	5:24	5:24	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	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:20	5:20	5:20

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

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.45 kWh/m².

For context, solar energy here swings from a low near 4.3 kWh/m² to a high of 6.98 kWh/m² in October across the year — September's 6.45 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)	5.9	5.9	6.0	6.0	6.0	6.1	6.1	6.1	6.2	6.2	6.2	6.3	6.3	6.3	6.4	6.4	6.5	6.5	6.6	6.6	6.7	6.7	6.8	6.8	6.8	6.9	6.9	6.9	6.9	7.0
Level	Bright	Bright	Bright	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	5.9	Bright
2	5.9	Bright
3	6.0	Bright
4	6.0	Intense
5	6.0	Intense
6	6.1	Intense
7	6.1	Intense
8	6.1	Intense
9	6.2	Intense
10	6.2	Intense
11	6.2	Intense
12	6.3	Intense
13	6.3	Intense
14	6.3	Intense
15	6.4	Intense
16	6.4	Intense
17	6.5	Intense
18	6.5	Intense
19	6.6	Intense
20	6.6	Intense
21	6.7	Intense
22	6.7	Intense
23	6.8	Intense
24	6.8	Intense
25	6.8	Intense
26	6.9	Intense
27	6.9	Intense
28	6.9	Intense
29	6.9	Intense
30	7.0	Intense

Planning a trip in September

Is September a good time to visit Sertânia?

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

5.2

Sightseeing

4th-best month of the year

8.2

Beach & pool

2nd-best month of the year

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

What to pack for Sertânia in September

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

In September, Sertânia sees daytime highs around 32°C and nights near 19°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Sertânia in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sertânia peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 10 (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	15	14	11	10	10	10	13	13	13	12
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Extreme

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

Location & terrain

Where is Sertânia?

Sertânia sits at 8.1°S, 37.3°W, 558 m above sea level, in Brazil. The nearest listed city is Monteiro, 26 km away.

Topography around Sertânia

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

Within 3 km, the terrain around Sertânia has only modest variations in elevation — a maximum elevation change of 111 m around an average of 571 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 568 m; within 80 km, large variations in elevation — a maximum elevation change of 792 m.

The land around Sertânia is covered by shrubs (47%) and grassland (36%) within 3 km, shrubs (71%) and grassland (24%) within 16 km, and shrubs (69%) and grassland (22%) within 80 km.

3 km

111 m

shrubs 47%

16 km

568 m

shrubs 71%

80 km

792 m

shrubs 69%

treesshrubsgrasslandcroplandartificial surfaces

← August Sertânia year-round climate October →Best places to visit in September

September weather nearby: Monteiro 26 km · Custódia 42 km · Arcoverde 45 km · Afogados da Ingazeira 55 km · Pedra 59 km · Sumé 62 km · Tabira 62 km · Buíque 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

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 Sertânia (-8.0736°, -37.2644°, elevation 558 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	31	19
2	31	19
3	31	19
4	31	19
5	31	19
6	31	19
7	31	19
8	31	19
9	31	19
10	31	19
11	31	19
12	31	19
13	31	19
14	32	19
15	32	19
16	32	19
17	32	19
18	32	19
19	32	19
20	32	19
21	32	19
22	32	19
23	32	19
24	32	19
25	33	19
26	33	19
27	33	19
28	33	19
29	33	19
30	33	20

	Clearer (%)	Cloudier (%)
1	69	31
2	69	31
3	70	30
4	70	30
5	70	30
6	70	30
7	70	30
8	70	30
9	71	29
10	71	29
11	71	29
12	72	28
13	73	27
14	74	26
15	75	25
16	76	24
17	77	23
18	78	22
19	79	21
20	81	19
21	82	18
22	84	16
23	85	15
24	85	15
25	86	14
26	86	14
27	87	13
28	87	13
29	86	14
30	86	14

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	1	43	55	1
2	1	43	55	1
3	1	43	55	1
4	1	43	55	1
5	1	43	55	1
6	1	43	55	1
7	1	43	55	1
8	1	43	55	1
9	1	43	55	1
10	1	43	55	1
11	1	43	54	2
12	1	44	53	2
13	1	44	53	2
14	1	44	53	2
15	1	45	53	1
16	1	45	53	1
17	1	46	52	1
18	1	47	51	1
19	1	47	51	1
20	1	48	50	1
21	1	48	50	1
22	1	49	50	1
23	1	49	49	1
24	1	49	49	1
25	1	50	49	1
26	1	50	49	0
27	1	51	48	0
28	1	51	48	0
29	1	51	48	0
30	1	50	49	0

	Avg high (°C)	Avg low (°C)
1	31	19
2	31	19
3	31	19
4	31	19
5	31	19
6	31	19
7	31	19
8	31	19
9	31	19
10	31	19
11	31	19
12	31	19
13	31	19
14	32	19
15	32	19
16	32	19
17	32	19
18	32	19
19	32	19
20	32	19
21	32	19
22	32	19
23	32	19
24	32	19
25	33	19
26	33	19
27	33	19
28	33	19
29	33	19
30	33	20

	Clearer (%)	Cloudier (%)
1	69	31
2	69	31
3	70	30
4	70	30
5	70	30
6	70	30
7	70	30
8	70	30
9	71	29
10	71	29
11	71	29
12	72	28
13	73	27
14	74	26
15	75	25
16	76	24
17	77	23
18	78	22
19	79	21
20	81	19
21	82	18
22	84	16
23	85	15
24	85	15
25	86	14
26	86	14
27	87	13
28	87	13
29	86	14
30	86	14

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	1	43	55	1
2	1	43	55	1
3	1	43	55	1
4	1	43	55	1
5	1	43	55	1
6	1	43	55	1
7	1	43	55	1
8	1	43	55	1
9	1	43	55	1
10	1	43	55	1
11	1	43	54	2
12	1	44	53	2
13	1	44	53	2
14	1	44	53	2
15	1	45	53	1
16	1	45	53	1
17	1	46	52	1
18	1	47	51	1
19	1	47	51	1
20	1	48	50	1
21	1	48	50	1
22	1	49	50	1
23	1	49	49	1
24	1	49	49	1
25	1	50	49	1
26	1	50	49	0
27	1	51	48	0
28	1	51	48	0
29	1	51	48	0
30	1	50	49	0

	Avg high (°C)	Avg low (°C)
1	31	19
2	31	19
3	31	19
4	31	19
5	31	19
6	31	19
7	31	19
8	31	19
9	31	19
10	31	19
11	31	19
12	31	19
13	31	19
14	32	19
15	32	19
16	32	19
17	32	19
18	32	19
19	32	19
20	32	19
21	32	19
22	32	19
23	32	19
24	32	19
25	33	19
26	33	19
27	33	19
28	33	19
29	33	19
30	33	20

	Clearer (%)	Cloudier (%)
1	69	31
2	69	31
3	70	30
4	70	30
5	70	30
6	70	30
7	70	30
8	70	30
9	71	29
10	71	29
11	71	29
12	72	28
13	73	27
14	74	26
15	75	25
16	76	24
17	77	23
18	78	22
19	79	21
20	81	19
21	82	18
22	84	16
23	85	15
24	85	15
25	86	14
26	86	14
27	87	13
28	87	13
29	86	14
30	86	14

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	1	43	55	1
2	1	43	55	1
3	1	43	55	1
4	1	43	55	1
5	1	43	55	1
6	1	43	55	1
7	1	43	55	1
8	1	43	55	1
9	1	43	55	1
10	1	43	55	1
11	1	43	54	2
12	1	44	53	2
13	1	44	53	2
14	1	44	53	2
15	1	45	53	1
16	1	45	53	1
17	1	46	52	1
18	1	47	51	1
19	1	47	51	1
20	1	48	50	1
21	1	48	50	1
22	1	49	50	1
23	1	49	49	1
24	1	49	49	1
25	1	50	49	1
26	1	50	49	0
27	1	51	48	0
28	1	51	48	0
29	1	51	48	0
30	1	50	49	0