Marco weather in September

In September, Marco sees average daytime highs of 34°C and overnight lows near 25°C, with 2 mm of rain across 0.4 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 34°C through the month. The sky is clear or mostly clear about 85% 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 Marco's 1st-clearest and 1st-windiest month. For the whole year in context, see Marco's year-round climate.

Daytime high
34°
1st warmest
Overnight low
25°
9th coldest
Rainfall
2 mm
0.4 wet days
Daylight
12 hours
5:35 AM – 5:34 PM
Cloud cover
22%
1st clearest
Wind
21 km/h
1st windiest
Solar energy
6.79 kWh/m²
Travel score
4.3
out of 10

Marco 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 Marco reaches about 34°C in the afternoon and slips back to 25°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 35°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)
13424
23424
33424
43425
53425
63425
73425
83425
93425
103425
113425
123425
133425
143425
153425
163425
173425
183425
193425
203325
213325
223325
233325
243325
253325
263325
273325
283325
293325
303425

How September really feels in Marco

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.

Marco 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
Jan32° / 25°10317.412.23.4
Feb31° / 24°1452112.13.1
Mar30° / 24°23126.4123.0
Apr30° / 24°26225.411.93.0
May31° / 24°11317.111.93.9
Jun32° / 24°286.711.84.7
Jul32° / 24°142.511.84.8
Aug33° / 24°30.511.94.4
Sep34° / 25°20.4124.3
Oct33° / 25°50.912.14.2
Nov33° / 25°61.312.14.1
Dec33° / 25°23612.24.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 85% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 4%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1955
2955
3955
4955
5955
6955
7955
8955
9955
10955
11955
12955
13955
14964
15964
16964
17973
18973
19973
20973
21973
22973
23973
24973
25973
26973
27955
28955
29955
30955

Chance of precipitation in September

Any precipitation

Marco gets around 2 mm of rain over 0.4 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 2% and peaks near 2% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
41
51
61
71
81
92
102
112
122
132
142
152
162
172
182
192
202
212
222
232
242
252
262
271
281
292
302

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 67% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
107327
207426
307426
407525
517425
617524
717524
817425
917425
1017326
1117227
1217128
1317029
1416930
1506931
1606832
1706634
1806535
1906337
2006238
2106139
2206040
2306040
2405941
2505941
2605842
2705842
2805842
2905743
3005743

Wind in September

Winds average 21 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 20 km/h on the calmest days to 21 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
120breezy
220breezy
321breezy
421breezy
521breezy
621breezy
721breezy
821breezy
921breezy
1021breezy
1121breezy
1221breezy
1321breezy
1421breezy
1521breezy
1621breezy
1721breezy
1821breezy
1921breezy
2021breezy
2121breezy
2221breezy
2321breezy
2421breezy
2521breezy
2621breezy
2721breezy
2821breezy
2921breezy
3021breezy

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 5:42 AM to 5:29 AM, and sunset from 5:38 PM to 5:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:425:38
211.95:425:38
311.95:415:38
411.95:415:38
512.05:405:37
612.05:405:37
712.05:405:37
812.05:395:37
912.05:395:36
1012.05:385:36
1112.05:385:36
1212.05:375:36
1312.05:375:35
1412.05:365:35
1512.05:365:35
1612.05:355:34
1712.05:355:34
1812.05:345:34
1912.05:345:34
2012.05:345:33
2112.05:335:33
2212.05:335:33
2312.05:325:32
2412.05:325:32
2512.05:315:32
2612.05:315:32
2712.05:305:31
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 6.79 kWh/m².

For context, solar energy here swings from a low near 4.65 kWh/m² to a high of 6.8 kWh/m² in October across the year — September's 6.79 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.6Intense
26.6Intense
36.7Intense
46.7Intense
56.7Intense
66.7Intense
76.7Intense
86.7Intense
96.7Intense
106.8Intense
116.8Intense
126.8Intense
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
286.8Intense
296.9Intense
306.9Intense
Planning a trip in September

Hazard calendar for Marco

In seasonPeak

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

Marco's monsoon runs February–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 Marco?

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

4.3
Sightseeing
4th-best month of the year
8.1
Beach & pool
1st-best month of the year

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

What to pack for Marco in September

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

In September, Marco sees daytime highs around 34°C and nights near 25°C. Pack light clothes and sun protection. Worth having: a windbreaker.

light clothessun protectiona windbreaker

Sea temperature near Marco 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 at the nearest coast (about 41 km away) is warmest in April at about 29°C and coldest in August near 27°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
Mar29Tropical
Apr29Tropical
May29Tropical
Jun28Tropical
Jul27Warm
Aug27Warm
Sep27Warm
Oct27Warm
Nov28Warm
Dec28Tropical

UV index in Marco 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 Marco peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 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 15Jun 23UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar16Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec11Extreme
Location & terrain

Where is Marco?

Marco sits at 3.1°S, 40.1°W, 22 m above sea level, in Brazil. The nearest listed city is Bela Cruz, 8.0 km away.

Topography around Marco

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

Within 3 km, the terrain around Marco has only modest variations in elevation — a maximum elevation change of 58 m around an average of 24 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 129 m; within 80 km, large variations in elevation — a maximum elevation change of 1,010 m.

The land around Marco is covered by grassland (48%) and trees (33%) within 3 km, trees (38%), grassland (35%) and shrubs (26%) within 16 km, and shrubs (31%), water (27%) and trees (21%) within 80 km.

3 km
58 m
16 km
129 m
80 km
1,010 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwatermangroves
September weather nearby: Bela Cruz 8.0 km · Morrinhos 12 km · Acaraú 27 km · Itarema 34 km · Santana do Acaraú 38 km · Jijoca de Jericoacoara 42 km · Amontada 44 km · Massapê 49 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 Marco (-3.1239°, -40.1467°, elevation 22 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).