São Gonçalo do Amarante weather in September

In September, São Gonçalo do Amarante sees average daytime highs of 30°C and overnight lows near 25°C, with 3 mm of rain across 0.6 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 30°C through the month. The sky is clear or mostly clear about 89% of the time in September, and the air most often feels oppressive.

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 São Gonçalo do Amarante's 1st-clearest and 1st-windiest month. For the whole year in context, see São Gonçalo do Amarante's year-round climate.

Daytime high
30°
2nd warmest
Overnight low
25°
8th coldest
Rainfall
3 mm
0.6 wet days
Daylight
12 hours
5:31 AM – 5:30 PM
Cloud cover
20%
1st clearest
Wind
24 km/h
1st windiest
Solar energy
6.78 kWh/m²
Travel score
6.6
out of 10

São Gonçalo do Amarante 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 30°C through the month.

A typical September day in São Gonçalo do Amarante reaches about 30°C in the afternoon and slips back to 25°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 31°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)
13025
23025
33025
43025
53025
63025
73025
83025
93025
103025
113025
123025
133025
143025
153025
163025
173025
183025
193025
203025
213025
223025
233025
243025
253025
263025
273025
283025
293025
303025

How September really feels in São Gonçalo do Amarante

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.

São Gonçalo do Amarante 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
Jan29° / 25°10318.412.24.3
Feb29° / 25°15121.312.13.8
Mar29° / 25°21525.9123.5
Apr29° / 25°25925.811.93.5
May29° / 25°11919.411.84.3
Jun29° / 25°6212.911.85.3
Jul30° / 24°316.511.86.0
Aug30° / 25°61.611.96.4
Sep30° / 25°30.6126.6
Oct30° / 25°4112.16.5
Nov30° / 26°71.912.26.2
Dec30° / 26°277.612.25.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 89% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 7% of September, with mostly cloudy or overcast conditions the remaining 4%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1964
2964
3964
4964
5964
6964
7964
8964
9964
10964
11964
12964
13964
14964
15964
16973
17964
18964
19964
20964
21964
22964
23964
24964
25964
26964
27955
28955
29946
30946

Chance of precipitation in September

Any precipitation

São Gonçalo do Amarante gets around 3 mm of rain over 0.6 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 3% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
13
23
32
42
52
62
72
82
92
103
113
123
133
143
153
163
173
183
192
202
212
222
232
242
252
262
272
282
292
302

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 68% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)
14258
24258
34258
44258
54258
64357
74258
84258
94159
104060
113961
123862
133664
143565
153466
163268
173169
183070
192872
202773
212674
222575
232476
242377
252278
262278
272179
282080
292080
301981

Wind in September

Winds average 24 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 24 km/h on the calmest days to 24 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
124breezy
224breezy
324breezy
424breezy
524breezy
624breezy
724breezy
824breezy
924breezy
1024breezy
1124breezy
1224breezy
1324breezy
1424breezy
1524breezy
1624breezy
1724breezy
1824breezy
1924breezy
2024breezy
2124breezy
2224breezy
2324breezy
2424breezy
2524breezy
2624breezy
2724breezy
2824breezy
2924breezy
3024breezy

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 5:38 AM to 5:24 AM, and sunset from 5:34 PM to 5:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:385:34
211.95:375:33
311.95:375:33
411.95:365:33
511.95:365:33
611.95:355:32
712.05:355:32
812.05:355:32
912.05:345:31
1012.05:345:31
1112.05:335:31
1212.05:335:31
1312.05:325:30
1412.05:325:30
1512.05:315:30
1612.05:315:30
1712.05:305:29
1812.05:305:29
1912.05:295:29
2012.05:295:29
2112.05:285:28
2212.05:285:28
2312.05:275:28
2412.05:275:27
2512.05:275:27
2612.05:265:27
2712.05:265:27
2812.05:255:26
2912.05:255:26
3012.05:245:26

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.78 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.81 kWh/m² to a high of 6.78 kWh/m² in September across the year — September's 6.78 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
296.8Intense
306.8Intense
Planning a trip in September

Hazard calendar for São Gonçalo do Amarante

In seasonPeak

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

São Gonçalo do Amarante's monsoon runs February–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 São Gonçalo do Amarante?

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
9.0
Beach & pool
1st-best month of the year

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

What to pack for São Gonçalo do Amarante in September

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

In September, São Gonçalo do Amarante sees daytime highs around 30°C and nights near 25°C. Pack light clothes and sun protection. Worth having: a windbreaker.

light clothessun protectiona windbreaker

Sea temperature near São Gonçalo do Amarante 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 28 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
Jun28Warm
Jul27Warm
Aug27Warm
Sep27Warm
Oct27Warm
Nov27Warm
Dec28Warm

UV index in São Gonçalo do Amarante 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 São Gonçalo do Amarante 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 São Gonçalo do Amarante?

São Gonçalo do Amarante sits at 3.6°S, 39.0°W, 23 m above sea level, in Brazil. The nearest listed city is Paracuru, 23 km away.

Topography around São Gonçalo do Amarante

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Gonçalo do Amarante.

Within 3 km, the terrain around São Gonçalo do Amarante has only modest variations in elevation — a maximum elevation change of 35 m around an average of 19 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 130 m; within 80 km, large variations in elevation — a maximum elevation change of 1,081 m.

The land around São Gonçalo do Amarante is covered by trees (37%) and grassland (31%) within 3 km, trees (41%), grassland (25%) and shrubs (23%) within 16 km, and water (30%), shrubs (27%) and trees (22%) within 80 km.

3 km
35 m
16 km
130 m
80 km
1,081 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Paracuru 23 km · Paraipaba 27 km · Caucaia 38 km · Pentecoste 39 km · Umirim 43 km · Maranguape 44 km · Maracanaú 48 km · Fortaleza 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 São Gonçalo do Amarante (-3.6072°, -38.9683°, elevation 23 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).