Santana do Acaraú weather in September

In September, Santana do Acaraú sees average daytime highs of 34°C and overnight lows near 24°C, with 2 mm of rain across 0.3 wet days and about 12 hours of daylight. It is the 3rd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 83% 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 Santana do Acaraú's 1st-clearest and 1st-windiest month. For the whole year in context, see Santana do Acaraú's year-round climate.

Daytime high
34°
3rd warmest
Overnight low
24°
8th coldest
Rainfall
2 mm
0.3 wet days
Daylight
12 hours
5:36 AM – 5:35 PM
Cloud cover
24%
1st clearest
Wind
16 km/h
1st windiest
Solar energy
6.77 kWh/m²
Travel score
3.8
out of 10

Santana do Acaraú is 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 34°C through the month.

A typical September day in Santana do Acaraú reaches about 34°C in the afternoon and slips back to 24°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 35°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13423
23423
33423
43423
53423
63424
73424
83424
93424
103424
113424
123424
133424
143424
153424
163424
173424
183424
193424
203424
213424
223424
233424
243424
253424
263424
273424
283424
293424
303524

How September really feels in Santana do Acaraú

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.

Santana do Acaraú weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 24°11317.612.23.2
Feb31° / 24°13920.712.13.1
Mar30° / 23°20125.8123.0
Apr30° / 23°20824.111.93.2
May31° / 23°9015.111.84.1
Jun31° / 23°25611.84.8
Jul32° / 23°142.811.84.8
Aug33° / 23°50.911.94.3
Sep34° / 24°20.3123.8
Oct35° / 24°40.912.13.5
Nov34° / 24°61.212.23.5
Dec34° / 24°27612.23.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 83% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 6%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1937
2937
3937
4937
5937
6937
7937
8937
9946
10946
11955
12955
13955
14955
15964
16964
17964
18964
19964
20964
21964
22955
23955
24955
25955
26955
27955
28946
29937
30937

Chance of precipitation in September

Any precipitation

Santana do Acaraú gets around 2 mm of rain over 0.3 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 2% 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
152
162
172
182
192
202
212
221
231
241
251
261
271
281
291
301

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 80% of days. Sticky, muggy-or-worse air turns up on roughly 82% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
124751
224751
324751
425741
525741
625741
725741
825741
924751
1024751
1123761
1222771
1321781
1421781
1520782
1619792
1718802
1817812
1916822
2015832
2115832
2214842
2313852
2412862
2512853
2611863
2711863
2811863
2910873
3010873

Wind in September

Winds average 16 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2915light breeze
3015light breeze

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 5:43 AM to 5:29 AM, and sunset from 5:39 PM to 5:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:435:39
211.95:425:38
311.95:425:38
411.95:415:38
511.95:415:38
611.95:405:37
712.05:405:37
812.05:395:37
912.05:395:37
1012.05:395:36
1112.05:385:36
1212.05:385:36
1312.05:375:35
1412.05:375:35
1512.05:365:35
1612.05:365:35
1712.05:355:34
1812.05:355:34
1912.05:345:34
2012.05:345:34
2112.05:335:33
2212.05:335:33
2312.05:325:33
2412.05:325:32
2512.05:325:32
2612.05:315:32
2712.05:315:32
2812.05:305:31
2912.05:305:31
3012.05:295:31

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.77 kWh/m².

For context, solar energy here swings from a low near 4.67 kWh/m² to a high of 6.78 kWh/m² in October across the year — September's 6.77 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.6Intense
26.6Intense
36.6Intense
46.6Intense
56.7Intense
66.7Intense
76.7Intense
86.7Intense
96.7Intense
106.7Intense
116.7Intense
126.7Intense
136.8Intense
146.8Intense
156.8Intense
166.8Intense
176.8Intense
186.8Intense
196.8Intense
206.8Intense
216.8Intense
226.8Intense
236.8Intense
246.8Intense
256.8Intense
266.8Intense
276.8Intense
286.9Intense
296.9Intense
306.9Intense
Planning a trip in September

Hazard calendar for Santana do Acaraú

In seasonPeak

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

Santana do Acaraú's monsoon runs January–April, when most of the year's rain falls.

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

Is September a good time to visit Santana do Acaraú?

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

3.8
Sightseeing
5th-best month of the year
7.8
Beach & pool
3rd-best month of the year

September is a weaker month for outdoor sightseeing in Santana do Acaraú. The water and warmth also suit a beach or pool day.

What to pack for Santana do Acaraú in September

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

In September, Santana do Acaraú sees daytime highs around 34°C and nights near 24°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Santana do Acaraú 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 Santana do Acaraú peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 16UV 15Jun 22UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Extreme
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec11Extreme

Air quality in Santana do Acaraú in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Santana do Acaraú is worst in December — around 17 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (July, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateDec 1017 µg/m³Jul 216 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb13Moderate
Mar12Moderate
Apr12Good
May10Good
Jun7Good
Jul6Good
Aug6Good
Sep7Good
Oct10Good
Nov17Moderate
Dec17Moderate
Location & terrain

Where is Santana do Acaraú?

Santana do Acaraú sits at 3.5°S, 40.2°W, 46 m above sea level, in Brazil. The nearest listed city is Massapê, 16 km away.

Topography around Santana do Acaraú

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

Within 3 km, the terrain around Santana do Acaraú has only modest variations in elevation — a maximum elevation change of 235 m around an average of 60 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 631 m; within 80 km, large variations in elevation — a maximum elevation change of 1,063 m.

The land around Santana do Acaraú is covered by shrubs (46%) and grassland (38%) within 3 km, shrubs (67%) and grassland (23%) within 16 km, and shrubs (48%), grassland (24%) and trees (21%) within 80 km.

3 km
235 m
16 km
631 m
80 km
1,063 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Massapê 16 km · Morrinhos 27 km · Meruoca 28 km · Sobral 29 km · Forquilha 38 km · Marco 38 km · Amontada 44 km · Bela Cruz 46 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 Santana do Acaraú (-3.4606°, -40.2122°, elevation 46 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).