Tibau do Sul weather in September

In September, Tibau do Sul sees average daytime highs of 27°C and overnight lows near 24°C, with 37 mm of rain across 14.7 wet days and about 12 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 71% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Tibau do Sul's 1st-clearest and 2nd-windiest month. For the whole year in context, see Tibau do Sul's year-round climate.

Daytime high
27°
10th warmest
Overnight low
24°
3rd coldest
Rainfall
37 mm
14.7 wet days
Daylight
12 hours
5:16 AM – 5:14 PM
Cloud cover
34%
1st clearest
Wind
25 km/h
2nd windiest
Solar energy
5.98 kWh/m²
Travel score
6.2
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical September day in Tibau do Sul reaches about 27°C in the afternoon and slips back to 24°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 27°C. Set against its neighbours, September runs on par with August and on par with October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12724
22724
32724
42724
52724
62724
72724
82724
92724
102724
112724
122724
132724
142724
152724
162724
172724
182724
192724
202724
212724
222724
232724
242724
252724
262724
272724
282724
292724
302724

How September really feels in Tibau do Sul

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.

Tibau do Sul weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 25°6116.612.35.1
Feb28° / 25°8416.312.24.8
Mar29° / 25°12221124.4
Apr28° / 25°17223.511.94.1
May28° / 25°15423.211.74.7
Jun27° / 24°17924.211.64.6
Jul26° / 23°1552511.74.7
Aug26° / 23°6819.911.85.5
Sep27° / 24°3714.7126.2
Oct27° / 24°229.312.16.9
Nov28° / 25°208.212.36.9
Dec28° / 25°3211.412.45.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 71% 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 7%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1919
2919
3919
4919
5919
6919
7919
8919
9919
10928
11928
12928
13928
14928
15937
16937
17937
18937
19946
20946
21946
22946
23946
24946
25946
26946
27946
28946
29946
30937

Chance of precipitation in September

Any precipitation

Tibau do Sul gets around 37 mm of rain over 14.7 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 49% and peaks near 59% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
159
258
358
457
557
657
757
857
957
1056
1156
1255
1355
1454
1553
1652
1751
1849
1948
2046
2144
2242
2340
2438
2537
2635
2734
2833
2932
3032

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 54% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
104852
204852
304852
404852
514851
614851
714851
814851
914752
1014752
1114752
1214653
1314653
1414653
1514653
1614653
1714653
1814554
1914554
2014554
2114554
2204555
2304555
2404555
2504456
2604456
2704357
2804258
2904159
3004159

Wind in September

Winds average 25 km/h in September.

Across September, daily wind ranges from about 24 km/h on the calmest days to 25 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
125breezy
225breezy
325breezy
425breezy
525breezy
625breezy
725breezy
825breezy
925breezy
1025breezy
1125breezy
1225breezy
1325breezy
1425breezy
1525breezy
1625breezy
1725breezy
1824breezy
1924breezy
2024breezy
2124breezy
2224breezy
2324breezy
2424breezy
2524breezy
2624breezy
2724breezy
2824breezy
2924breezy
3024breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over September. Sunrise moves from 5:24 AM to 5:08 AM, and sunset from 5:16 PM to 5:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:245:16
211.95:235:16
311.95:235:16
411.95:225:16
511.95:225:16
611.95:215:16
711.95:215:15
811.95:205:15
911.95:195:15
1011.95:195:15
1111.95:185:15
1211.95:185:14
1311.95:175:14
1412.05:175:14
1512.05:165:14
1612.05:165:14
1712.05:155:13
1812.05:155:13
1912.05:145:13
2012.05:145:13
2112.05:135:13
2212.05:125:13
2312.05:125:12
2412.05:115:12
2512.05:115:12
2612.05:105:12
2712.05:105:12
2812.05:095:11
2912.05:095:11
3012.05:085:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.98 kWh/m².

For context, solar energy here swings from a low near 4.45 kWh/m² to a high of 6.33 kWh/m² in November across the year — September's 5.98 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
156.0Bright
166.0Bright
176.0Bright
186.0Intense
196.0Intense
206.0Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.1Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
Planning a trip in September

Hazard calendar for Tibau do Sul

In seasonPeak

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

Tibau do Sul's rainy season runs February–July, 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 Tibau do Sul?

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

6.2
Sightseeing
3rd-best month of the year
6.2
Beach & pool
4th-best month of the year

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

What to pack for Tibau do Sul in September

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

In September, Tibau do Sul sees daytime highs around 27°C and nights near 24°C. Pack rain gear. Worth having: light clothes, sun protection and a windbreaker. About 15 days see rain.

rain gearlight clothessun protectiona windbreaker

Sea temperature near Tibau do Sul 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 25 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
Jun28Warm
Jul27Warm
Aug26Warm
Sep26Warm
Oct27Warm
Nov27Warm
Dec28Warm

UV index in Tibau do Sul 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 Tibau do Sul peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 13UV 15Jul 12UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is Tibau do Sul?

Tibau do Sul sits at 6.2°S, 35.1°W, 39 m above sea level, in Brazil. The nearest listed city is Goianinha, 16 km away.

Topography around Tibau do Sul

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

Within 3 km, the terrain around Tibau do Sul has only modest variations in elevation — a maximum elevation change of 79 m around an average of 9 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 109 m; within 80 km, significant variations in elevation — a maximum elevation change of 554 m.

The land around Tibau do Sul is covered by water (64%) within 3 km, water (46%) and grassland (24%) within 16 km, and grassland (40%) and water (34%) within 80 km.

3 km
79 m
16 km
109 m
80 km
554 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Goianinha 16 km · Nísia Floresta 17 km · São José de Mipibu 20 km · Canguaretama 22 km · Monte Alegre 30 km · Parnamirim 36 km · Santo Antônio 45 km · Natal 45 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 Tibau do Sul (-6.1867°, -35.0919°, elevation 39 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).