Conceição de Macabu weather in September

In September, Conceição de Macabu sees average daytime highs of 27°C and overnight lows near 18°C, with 66 mm of rain across 9.8 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 33% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 36 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Conceição de Macabu's 6th-clearest and 1st-windiest month. For the whole year in context, see Conceição de Macabu's year-round climate.

Daytime high
27°
8th warmest
Overnight low
18°
4th coldest
Rainfall
66 mm
9.8 wet days
Daylight
11 h 54 min
6:46 AM – 6:38 PM
Cloud cover
58%
6th clearest
Wind
8 km/h
1st windiest
Solar energy
4.62 kWh/m²
Travel score
6.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical September day in Conceição de Macabu reaches about 27°C in the afternoon and slips back to 18°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 32°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12717
22717
32717
42717
52717
62717
72717
82718
92718
102718
112718
122718
132718
142718
152718
162718
172718
182718
192718
202718
212718
222718
232718
242718
252718
262718
272718
282718
292718
302718

How September really feels in Conceição de Macabu

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.

Conceição de Macabu weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 22°20218.113.23.6
Feb31° / 22°11913.912.83.7
Mar30° / 22°18118.712.23.9
Apr29° / 20°9413.811.55.3
May26° / 18°609.7116.7
Jun26° / 17°28610.77.5
Jul26° / 16°285.610.87.7
Aug26° / 17°285.911.27.4
Sep27° / 18°669.811.96.5
Oct28° / 19°10513.212.55.7
Nov28° / 20°22118.513.14.6
Dec30° / 22°24321.113.33.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 54%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16139
26139
36139
46040
56040
65941
75743
85644
95446
105347
115149
125050
134852
144753
154555
164456
174357
184258
194060
203961
213862
223763
233664
243664
253664
263565
273466
283565
293466
303466

Chance of precipitation in September

Any precipitation

Conceição de Macabu gets around 66 mm of rain over 9.8 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 32% and peaks near 40% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
121
222
322
423
523
624
725
826
927
1028
1128
1229
1330
1431
1532
1633
1734
1835
1936
2037
2137
2238
2339
2439
2540
2640
2740
2840
2940
3040

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the humid band about 46% of days. Sticky, muggy-or-worse air turns up on roughly 35% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
142252220
242153220
342153220
432153230
532054230
632053240
732052250
831952260
931951270
1031851280
1131751290
1231750300
1321649321
1421549331
1521548341
1621447361
1721346371
1831345382
1931244392
2031243402
2131242402
2231241413
2331241413
2431140424
2531139424
2631139425
2731138425
2831138426
2931138427
3031137427

Wind in September

Winds average 8 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 36 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over September. Sunrise moves from 7:01 AM to 6:31 AM, and sunset from 6:34 PM to 6:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:016:34
211.67:006:34
311.66:596:34
411.66:586:35
511.66:576:35
611.76:566:35
711.76:556:36
811.76:546:36
911.76:536:36
1011.76:526:36
1111.86:516:37
1211.86:506:37
1311.86:496:37
1411.86:486:37
1511.96:476:38
1611.96:466:38
1711.96:456:38
1811.96:446:39
1911.96:426:39
2012.06:416:39
2112.06:406:39
2212.06:396:40
2312.06:386:40
2412.06:376:40
2512.16:366:41
2612.16:356:41
2712.16:346:41
2812.16:336:42
2912.26:326:42
3012.26:316:42

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.62 kWh/m².

For context, solar energy here swings from a low near 3.45 kWh/m² to a high of 6.1 kWh/m² in February across the year — September's 4.62 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.6Bright
54.6Bright
64.6Bright
74.6Bright
84.6Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.6Bright
214.6Bright
224.6Bright
234.6Bright
244.6Bright
254.6Bright
264.6Bright
274.6Bright
284.7Bright
294.7Bright
304.7Bright
Planning a trip in September

Hazard calendar for Conceição de Macabu

In seasonPeak

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

Conceição de Macabu's rainy season runs November–March, 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 Conceição de Macabu?

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

6.5
Sightseeing
5th-best month of the year
6.6
Beach & pool
4th-best month of the year

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

What to pack for Conceição de Macabu in September

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

In September, Conceição de Macabu sees daytime highs around 27°C and nights near 18°C. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Conceição de Macabu in September

The nearest coast averages about 22°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 41 km away) is warmest in March at about 25°C and coldest in September near 22°C.

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

20°22°24°26°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan24Refreshing
Feb24Warm
Mar25Warm
Apr25Warm
May24Refreshing
Jun23Refreshing
Jul22Refreshing
Aug22Refreshing
Sep22Refreshing
Oct22Refreshing
Nov23Refreshing
Dec24Refreshing

UV index in Conceição de Macabu in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Conceição de Macabu peaks around January 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 21UV 14Jun 23UV 6
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar13Extreme
Apr10Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep8Very high
Oct12Extreme
Nov14Extreme
Dec14Extreme
Location & terrain

Where is Conceição de Macabu?

Conceição de Macabu sits at 22.1°S, 41.9°W, 43 m above sea level, in Brazil. The nearest listed city is Macaé, 34 km away.

Topography around Conceição de Macabu

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

Within 3 km, the terrain around Conceição de Macabu has significant variations in elevation — a maximum elevation change of 557 m around an average of 98 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,236 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,215 m.

The land around Conceição de Macabu is covered by grassland (53%) and trees (42%) within 3 km, trees (52%) and grassland (48%) within 16 km, and grassland (47%), trees (29%) and water (20%) within 80 km.

3 km
557 m
16 km
1,236 m
80 km
2,215 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Macaé 34 km · Quissamã 41 km · Rio das Ostras 50 km · São Fidélis 50 km · Itaocara 51 km · Cordeiro 51 km · Cantagalo 53 km · Casimiro de Abreu 56 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 Conceição de Macabu (-22.0853°, -41.8683°, elevation 43 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).