Apicum-Açu weather in September

In September, Apicum-Açu sees average daytime highs of 28°C and overnight lows near 26°C, with 18 mm of rain across 6.4 wet days and about 12 hours of daylight. It is the 6th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 73% of the time in September, and the air most often feels oppressive.

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

Daytime high
28°
6th warmest
Overnight low
26°
9th coldest
Rainfall
18 mm
6.4 wet days
Daylight
12 hours
5:55 AM – 5:54 PM
Cloud cover
34%
2nd clearest
Wind
19 km/h
1st windiest
Solar energy
6.09 kWh/m²
Travel score
6.6
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical September day in Apicum-Açu reaches about 28°C in the afternoon and slips back to 26°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 29°C. Set against its neighbours, September runs on par with August and on par with October.

24°26°28°30°32°151015202530
Avg high (°C)Avg low (°C)
12826
22826
32826
42826
52826
62826
72826
82826
92826
102826
112826
122826
132826
142826
152826
162826
172826
182826
192826
202826
212826
222826
232826
242826
252826
262826
272826
282926
292926
302926

How September really feels in Apicum-Açu

Once humidity and wind are folded in, September averages 8 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
8
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.

Apicum-Açu weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 25°19625.512.13.7
Feb28° / 25°29726.4123.4
Mar28° / 25°39830.3123.3
Apr28° / 25°39928.9123.2
May29° / 25°25627.411.93.5
Jun29° / 25°11622.211.94.3
Jul28° / 25°721911.95.0
Aug28° / 26°3312.4125.9
Sep28° / 26°186.4126.6
Oct29° / 26°155.2126.5
Nov29° / 26°205.712.16.2
Dec29° / 26°6515.512.14.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 73% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 7%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1955
2955
3955
4955
5955
6955
7955
8955
9955
10955
11946
12946
13946
14937
15937
16928
17928
18919
19919
20919
21919
22919
23919
24919
25919
26919
27919
28919
29919
30919

Chance of precipitation in September

Any precipitation

Apicum-Açu gets around 18 mm of rain over 6.4 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 22% and peaks near 29% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
129
228
328
427
526
625
725
824
924
1023
1123
1223
1322
1422
1522
1621
1721
1820
1920
2020
2119
2219
2319
2418
2518
2618
2717
2817
2917
3016

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 79% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
17228
27327
37327
47426
57525
67525
77624
87624
97723
107723
117723
127723
137822
147822
157921
167921
178020
188119
198119
208218
218218
228317
238317
248317
258416
268416
278416
288416
298416
308416

Wind in September

Winds average 19 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 19 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 hours 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 0 minutes over September. Sunrise moves from 6:01 AM to 5:49 AM, and sunset from 5:59 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:015:59
212.06:015:59
312.06:005:59
412.06:005:58
512.05:595:58
612.05:595:58
712.05:595:57
812.05:585:57
912.05:585:57
1012.05:575:56
1112.05:575:56
1212.05:575:56
1312.05:565:55
1412.05:565:55
1512.05:555:55
1612.05:555:54
1712.05:545:54
1812.05:545:54
1912.05:545:53
2012.05:535:53
2112.05:535:53
2212.05:525:52
2312.05:525:52
2412.05:525:52
2512.05:515:51
2612.05:515:51
2712.05:505:51
2812.05:505:51
2912.05:505:50
3012.05:495:50

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.09 kWh/m².

For context, solar energy here swings from a low near 4.21 kWh/m² to a high of 6.21 kWh/m² in October across the year — September's 6.09 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
36.0Bright
46.0Bright
56.0Bright
66.0Bright
76.0Intense
86.0Intense
96.0Intense
106.0Intense
116.0Intense
126.0Intense
136.1Intense
146.1Intense
156.1Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
216.1Intense
226.1Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
Planning a trip in September

Hazard calendar for Apicum-Açu

In seasonPeak

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

Apicum-Açu's monsoon runs January–May, 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 Apicum-Açu?

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
7.9
Beach & pool
2nd-best month of the year

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

What to pack for Apicum-Açu in September

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

In September, Apicum-Açu sees daytime highs around 28°C and nights near 26°C. Pack light clothes and sun protection. About 6 days see rain.

light clothessun protection

Sea temperature near Apicum-Açu in September

The nearest coast averages about 28°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 18 km away) is warmest in May at about 29°C and coldest in September near 28°C.

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

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb28Tropical
Mar28Tropical
Apr29Tropical
May29Tropical
Jun29Tropical
Jul28Tropical
Aug28Warm
Sep28Warm
Oct28Warm
Nov28Tropical
Dec28Tropical

UV index in Apicum-Açu 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 Apicum-Açu peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 19 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 17UV 15Jul 19UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar16Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Apicum-Açu 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 Apicum-Açu is worst in February — around 20 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (July, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodFeb 2020 µg/m³Jul 126 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb20Moderate
Mar19Moderate
Apr13Moderate
May8Good
Jun7Good
Jul6Good
Aug8Good
Sep9Good
Oct10Good
Nov10Good
Dec12Good
Location & terrain

Where is Apicum-Açu?

Apicum-Açu sits at 1.5°S, 45.1°W, 1 m above sea level, in Brazil. The nearest listed city is Bacuri, 23 km away.

Topography around Apicum-Açu

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

Within 3 km, the terrain around Apicum-Açu has only modest variations in elevation — a maximum elevation change of 26 m around an average of 12 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 52 m; within 80 km, only modest variations in elevation — a maximum elevation change of 122 m.

The land around Apicum-Açu is covered by mangroves (35%), trees (31%) and grassland (26%) within 3 km, water (36%), mangroves (30%) and trees (26%) within 16 km, and water (44%) and trees (35%) within 80 km.

3 km
26 m
16 km
52 m
80 km
122 m
treesgrasslandartificial surfaceswaterwetlandmangroves
September weather nearby: Bacuri 23 km · Turiaçu 36 km · Cururupu 41 km · Cândido Mendes 73 km · Turilândia 81 km · Santa Helena 82 km · Bequimão 108 km · Pinheiro 110 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 Apicum-Açu (-1.5282°, -45.0786°, elevation 1 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. 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).