Catu weather in September

In September, Catu sees average daytime highs of 28°C and overnight lows near 20°C, with 37 mm of rain across 12 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 27°C in the first days to 29°C by the end. The sky is clear or mostly clear about 23% 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 Catu's 2nd-clearest and 4th-windiest month. For the whole year in context, see Catu's year-round climate.

Daytime high
28°
8th warmest
Overnight low
20°
3rd coldest
Rainfall
37 mm
12 wet days
Daylight
11 h 54 min
5:30 AM – 5:26 PM
Cloud cover
55%
2nd clearest
Wind
11 km/h
4th windiest
Solar energy
5.03 kWh/m²
Travel score
5.7
out of 10

Catu is human settlement in Brazil.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 27°C in the first days to 29°C by the end.

A typical September day in Catu reaches about 28°C in the afternoon and slips back to 20°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 31°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°C cooler than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12719
22719
32719
42719
52819
62819
72820
82820
92820
102820
112820
122820
132820
142820
152820
162820
172820
182820
192920
202920
212920
222920
232920
242920
252920
262920
272920
282920
292921
302921

How September really feels in Catu

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.

Catu weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°571112.63.8
Feb32° / 23°5211.912.43.6
Mar32° / 23°6514.812.13.6
Apr30° / 22°8118.811.73.9
May28° / 21°9519.811.44.7
Jun27° / 20°7820.111.35.1
Jul26° / 19°621811.35.5
Aug27° / 19°4916.511.65.6
Sep28° / 20°371211.95.7
Oct30° / 21°378.412.35.1
Nov31° / 22°529.112.64.4
Dec32° / 23°458.112.74.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 40% of September, with mostly cloudy or overcast conditions the remaining 37%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16040
26040
36040
46040
56040
66040
75941
85941
95941
106040
116040
126139
136238
146238
156337
166337
176535
186535
196535
206535
216634
226634
236733
246733
256733
266733
276733
286733
296733
306733

Chance of precipitation in September

Any precipitation

Catu gets around 37 mm of rain over 12 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 40% and peaks near 47% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
145
246
346
446
546
647
747
847
947
1046
1146
1245
1344
1443
1542
1641
1739
1838
1937
2036
2135
2234
2333
2432
2531
2631
2730
2829
2929
3029

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 83% of days. Sticky, muggy-or-worse air turns up on roughly 88% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1117802
2117802
3117802
4116812
5116812
6116812
7116812
8115813
9015823
10014833
11014833
12113833
13113833
14112834
15111844
16110854
17110854
1819855
1919855
2018865
2118856
2208866
2308857
2408848
2508848
2608839
27088210
28088210
29078211
30078112

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 5:40 AM to 5:20 AM, and sunset from 5:26 PM to 5:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.85:405:26
211.85:405:26
311.85:395:26
411.85:385:26
511.85:385:26
611.85:375:26
711.85:365:26
811.85:365:26
911.95:355:26
1011.95:345:26
1111.95:335:26
1211.95:335:26
1311.95:325:26
1411.95:315:26
1511.95:315:26
1611.95:305:26
1711.95:295:26
1812.05:285:26
1912.05:285:26
2012.05:275:26
2112.05:265:26
2212.05:265:26
2312.05:255:26
2412.05:245:26
2512.05:235:26
2612.15:235:26
2712.15:225:26
2812.15:215:26
2912.15:215:26
3012.15:205:26

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.03 kWh/m².

For context, solar energy here swings from a low near 3.59 kWh/m² to a high of 6.01 kWh/m² in December across the year — September's 5.03 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.9Bright
114.9Bright
124.9Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.1Bright
185.1Bright
195.1Bright
205.2Bright
215.2Bright
225.2Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
Planning a trip in September

Is September a good time to visit Catu?

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

5.7
Sightseeing
1st-best month of the year
6.6
Beach & pool
4th-best month of the year

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

What to pack for Catu in September

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

In September, Catu sees daytime highs around 28°C and nights near 20°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

Sea temperature near Catu 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 55 km away) is warmest in April at about 28°C and coldest in August near 25°C.

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

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb28Warm
Mar28Tropical
Apr28Tropical
May28Warm
Jun27Warm
Jul26Warm
Aug25Warm
Sep26Warm
Oct26Warm
Nov26Warm
Dec27Warm

UV index in Catu 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 Catu peaks around February 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 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 highExtremeFeb 17UV 15Jun 23UV 9
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun9Very high
Jul9Very high
Aug10Very high
Sep11Extreme
Oct12Extreme
Nov13Extreme
Dec13Extreme
Location & terrain

Where is Catu?

Catu sits at 12.4°S, 38.4°W, 79 m above sea level, in Brazil. The nearest listed city is Pojuca, 10 km away.

Topography around Catu

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

Within 3 km, the terrain around Catu has only modest variations in elevation — a maximum elevation change of 132 m around an average of 124 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 220 m; within 80 km, large variations in elevation — a maximum elevation change of 602 m.

The land around Catu is covered by trees (58%) and grassland (31%) within 3 km, trees (53%) and grassland (46%) within 16 km, and grassland (36%), trees (34%) and water (23%) within 80 km.

3 km
132 m
16 km
220 m
80 km
602 m
treesshrubsgrasslandcroplandartificial surfaceswatermangroves
September weather nearby: Pojuca 10 km · Mata de São João 22 km · São Sebastião do Passé 22 km · Alagoinhas 25 km · Dias d'Ávila 30 km · Camaçari 39 km · Candeias 40 km · Amélia Rodrigues 41 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 Catu (-12.3531°, -38.3789°, elevation 79 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).