Acará weather in September

In September, Acará sees average daytime highs of 34°C and overnight lows near 23°C, with 22 mm of rain across 5.7 wet days and about 12 hours of daylight. It is the 2nd-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 37% 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 Acará's 3rd-clearest and 1st-windiest month. For the whole year in context, see Acará's year-round climate.

Daytime high
34°
2nd warmest
Overnight low
23°
9th coldest
Rainfall
22 mm
5.7 wet days
Daylight
12 hours
6:07 AM – 6:07 PM
Cloud cover
48%
3rd clearest
Wind
9 km/h
1st windiest
Solar energy
6.06 kWh/m²
Travel score
3.3
out of 10

Acará 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 34°C through the month.

A typical September day in Acará reaches about 34°C in the afternoon and slips back to 23°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 36°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13423
23423
33423
43423
53423
63423
73423
83423
93423
103423
113423
123423
133423
143423
153423
163423
173423
183423
193423
203423
213423
223423
233423
243423
253423
263423
273423
283423
293423
303423

How September really feels in Acará

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.

Acará weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°22025.612.12.6
Feb31° / 23°29525.812.12.6
Mar30° / 23°37629.9122.5
Apr30° / 23°37728.9122.5
May31° / 23°23926.311.92.8
Jun31° / 23°9918.811.93.4
Jul32° / 22°5512.411.93.8
Aug34° / 23°26711.93.6
Sep34° / 23°225.7123.3
Oct34° / 23°296.9123.1
Nov34° / 24°537.812.13.1
Dec33° / 24°1051612.12.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 39% of September, with mostly cloudy or overcast conditions the remaining 24%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17822
27723
37723
47723
57723
67723
77723
87723
97723
107723
117723
127624
137624
147624
157723
167624
177624
187624
197624
207525
217525
227525
237525
247525
257525
267525
277426
287426
297327
307228

Chance of precipitation in September

Any precipitation

Acará gets around 22 mm of rain over 5.7 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 19% and peaks near 20% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
120
220
320
420
520
619
719
819
919
1019
1119
1219
1319
1419
1519
1619
1719
1819
1919
2019
2119
2219
2319
2419
2519
2619
2719
2818
2919
3019

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 89% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
16922
26922
37921
47921
58911
68911
79901
89901
99901
109901
119901
129901
1310891
1410891
1510891
1610891
1710891
1810891
1910891
2011881
2111890
2211890
2311890
2412880
2512880
2613870
2713870
2813870
2913870
3013870

Wind in September

Winds average 9 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

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 6:14 AM to 6:02 AM, and sunset from 6:11 PM to 6:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:146:11
212.06:136:11
312.06:136:11
412.06:126:11
512.06:126:10
612.06:126:10
712.06:116:10
812.06:116:09
912.06:106:09
1012.06:106:09
1112.06:106:08
1212.06:096:08
1312.06:096:08
1412.06:086:07
1512.06:086:07
1612.06:076:07
1712.06:076:06
1812.06:076:06
1912.06:066:06
2012.06:066:06
2112.06:056:05
2212.06:056:05
2312.06:046:05
2412.06:046:04
2512.06:046:04
2612.06:036:04
2712.06:036:03
2812.06:026:03
2912.06:026:03
3012.06:026:03

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.06 kWh/m².

For context, solar energy here swings from a low near 4.06 kWh/m² to a high of 6.16 kWh/m² in October across the year — September's 6.06 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
46.0Bright
56.0Bright
66.0Bright
76.0Bright
86.0Bright
96.0Bright
106.0Intense
116.0Intense
126.0Intense
136.0Intense
146.0Intense
156.0Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
Planning a trip in September

Hazard calendar for Acará

In seasonPeak

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

Acará'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 Acará?

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

3.3
Sightseeing
4th-best month of the year
6.6
Beach & pool
2nd-best month of the year

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

What to pack for Acará in September

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

In September, Acará sees daytime highs around 34°C and nights near 23°C. Pack light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Acará 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 Acará peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 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 15Nov 22UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct11Extreme
Nov10Extreme
Dec10Extreme

Air quality in Acará 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 Acará is worst in November — around 32 µg/m³ PM2.5 (moderate), about 3.4× the cleanest month (June, 9 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 1931 µg/m³Jun 1410 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb18Moderate
Mar18Moderate
Apr15Moderate
May10Good
Jun9Good
Jul11Good
Aug14Moderate
Sep16Moderate
Oct19Moderate
Nov32Moderate
Dec27Moderate
Location & terrain

Where is Acará?

Acará sits at 2.0°S, 48.2°W, 6 m above sea level, in Brazil. The nearest listed city is Concórdia do Pará, 28 km away.

Topography around Acará

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

Within 3 km, the terrain around Acará has only modest variations in elevation — a maximum elevation change of 60 m around an average of 19 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 76 m; within 80 km, only modest variations in elevation — a maximum elevation change of 88 m.

The land around Acará is covered by trees (76%) within 3 km, trees (91%) within 16 km, and trees (78%) within 80 km.

3 km
60 m
16 km
76 m
80 km
88 m
treesgrasslandartificial surfaceswater
September weather nearby: Concórdia do Pará 28 km · Tomé-Açu 51 km · Bujaru 52 km · São Domingos do Capim 57 km · Moju 64 km · Belém 66 km · Benevides 67 km · Ananindeua 69 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 Acará (-1.9608°, -48.1967°, elevation 6 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).