Areia Branca weather in September

In September, Areia Branca sees average daytime highs of 30°C and overnight lows near 24°C, with 1 mm of rain across 0.2 wet days and about 12 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 81% of the time in September, and the air most often feels muggy.

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 Areia Branca's 1st-clearest and 3rd-windiest month. For the whole year in context, see Areia Branca's year-round climate.

Daytime high
30°
1st warmest
Overnight low
24°
3rd coldest
Rainfall
1 mm
0.2 wet days
Daylight
12 hours
5:24 AM – 5:22 PM
Cloud cover
24%
1st clearest
Wind
24 km/h
3rd windiest
Solar energy
6.72 kWh/m²
Travel score
6.6
out of 10

Areia Branca 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

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Areia Branca reaches about 30°C in the afternoon and slips back to 24°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 31°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13024
23024
33024
43024
53024
63024
73024
83024
93024
103024
113024
123024
133024
143024
153024
163024
173024
183024
193024
203024
213024
223024
233024
243024
253024
263024
273024
283024
293024
303024

How September really feels in Areia Branca

Once humidity and wind are folded in, September averages 30 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
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Areia Branca weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 25°7011.812.34.9
Feb30° / 25°9313.812.24.5
Mar30° / 25°14819.8124.1
Apr30° / 25°14118.411.94.1
May30° / 25°6510.411.85.1
Jun30° / 24°336.211.75.7
Jul30° / 24°213.111.76.2
Aug30° / 23°20.511.86.5
Sep30° / 24°10.2126.6
Oct30° / 24°10.212.16.5
Nov30° / 25°20.512.26.4
Dec30° / 25°14412.35.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 81% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 6%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1928
2937
3937
4937
5937
6928
7928
8928
9928
10937
11937
12946
13946
14946
15946
16955
17955
18955
19955
20964
21964
22964
23964
24964
25955
26955
27955
28955
29955
30946

Chance of precipitation in September

Any precipitation

Areia Branca gets around 1 mm of rain over 0.2 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 1% and peaks near 1% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
41
51
61
71
81
91
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
250
260
270
280
290
300

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 78% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
138215
238215
338215
428315
528315
628315
728315
828315
928315
1028216
1128216
1228117
1328117
1428018
1518019
1618019
1717920
1817821
1917722
2017623
2117524
2207525
2307426
2407327
2507228
2607129
2707030
2807030
2906931
3006832

Wind in September

Winds average 24 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
124breezy
224breezy
324breezy
424breezy
524breezy
624breezy
724breezy
824breezy
924breezy
1024breezy
1124breezy
1224breezy
1324breezy
1424breezy
1524breezy
1624breezy
1724breezy
1824breezy
1924breezy
2025breezy
2125breezy
2225breezy
2325breezy
2425breezy
2525breezy
2625breezy
2725breezy
2825breezy
2925breezy
3025breezy

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 5:31 AM to 5:17 AM, and sunset from 5:25 PM to 5:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:315:25
211.95:315:25
311.95:305:25
411.95:305:25
511.95:295:25
611.95:295:24
711.95:285:24
811.95:285:24
911.95:275:24
1011.95:275:23
1112.05:265:23
1212.05:265:23
1312.05:255:23
1412.05:255:23
1512.05:245:22
1612.05:245:22
1712.05:235:22
1812.05:235:22
1912.05:225:21
2012.05:225:21
2112.05:215:21
2212.05:215:21
2312.05:205:20
2412.05:205:20
2512.05:195:20
2612.05:195:20
2712.05:185:20
2812.05:185:19
2912.05:175:19
3012.05:175:19

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.72 kWh/m².

For context, solar energy here swings from a low near 4.98 kWh/m² to a high of 6.94 kWh/m² in October across the year — September's 6.72 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.4Intense
26.4Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.5Intense
96.6Intense
106.6Intense
116.6Intense
126.6Intense
136.7Intense
146.7Intense
156.7Intense
166.7Intense
176.7Intense
186.8Intense
196.8Intense
206.8Intense
216.8Intense
226.8Intense
236.9Intense
246.9Intense
256.9Intense
266.9Intense
276.9Intense
286.9Intense
297.0Intense
307.0Intense
Planning a trip in September

Hazard calendar for Areia Branca

In seasonPeak

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

Areia Branca's rainy season runs January–April, 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 Areia Branca?

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

6.6
Sightseeing
1st-best month of the year
9.0
Beach & pool
1st-best month of the year

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

What to pack for Areia Branca in September

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

In September, Areia Branca sees daytime highs around 30°C and nights near 24°C. Pack light clothes and sun protection. Worth having: a windbreaker.

light clothessun protectiona windbreaker

Sea temperature near Areia Branca in September

The nearest coast averages about 27°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore 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
Jan28Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun28Warm
Jul27Warm
Aug26Warm
Sep27Warm
Oct27Warm
Nov28Warm
Dec28Tropical

UV index in Areia Branca 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 Areia Branca peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 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 16UV 15Jul 13UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec11Extreme
Location & terrain

Where is Areia Branca?

Areia Branca sits at 5.0°S, 37.1°W, 11 m above sea level, in Brazil. The nearest listed city is Mossoró, 34 km away.

Topography around Areia Branca

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

Within 3 km, the terrain around Areia Branca has only modest variations in elevation — a maximum elevation change of 12 m around an average of 1 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 186 m; within 80 km, significant variations in elevation — a maximum elevation change of 272 m.

The land around Areia Branca is covered by water (77%) within 3 km, water (51%) and shrubs (30%) within 16 km, and shrubs (42%) and water (33%) within 80 km.

3 km
12 m
16 km
186 m
80 km
272 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Mossoró 34 km · Icapuí 36 km · Baraúna 55 km · Macau 58 km · Jaguaruana 73 km · Açu 73 km · Aracati 83 km · Guamaré 92 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 Areia Branca (-4.9561°, -37.1369°, elevation 11 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).