Goianinha weather in September

In September, Goianinha sees average daytime highs of 29°C and overnight lows near 22°C, with 20 mm of rain across 7.7 wet days and about 12 hours of daylight. It is the 9th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 54% 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 Goianinha's 1st-clearest and 1st-windiest month. For the whole year in context, see Goianinha's year-round climate.

Daytime high
29°
9th warmest
Overnight low
22°
3rd coldest
Rainfall
20 mm
7.7 wet days
Daylight
12 hours
5:16 AM – 5:14 PM
Cloud cover
40%
1st clearest
Wind
17 km/h
1st windiest
Solar energy
5.85 kWh/m²
Travel score
6.1
out of 10

Goianinha 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 29°C through the month.

A typical September day in Goianinha reaches about 29°C in the afternoon and slips back to 22°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 30°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12822
22822
32822
42822
52822
62922
72922
82922
92922
102922
112922
122922
132922
142922
152922
162922
172922
182922
192922
202922
212922
222922
232922
242923
252923
262923
272923
282923
292923
302923

How September really feels in Goianinha

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.

Goianinha weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°5215.412.34.3
Feb31° / 24°6615.212.24.0
Mar31° / 24°9420.2123.7
Apr30° / 24°11920.911.93.8
May29° / 23°9217.411.74.6
Jun28° / 23°941711.65.1
Jul28° / 22°7715.711.75.8
Aug28° / 22°3110.711.86.3
Sep29° / 22°207.7126.1
Oct30° / 23°146.212.15.9
Nov30° / 24°156.512.35.5
Dec30° / 24°2610.312.44.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 34% of September, with mostly cloudy or overcast conditions the remaining 12%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18515
28515
38515
48515
58515
68515
78515
88515
98515
108614
118713
128713
138812
148812
158812
168812
178911
189010
199010
209010
219010
22919
23919
24919
25919
26919
279010
289010
299010
309010

Chance of precipitation in September

Any precipitation

Goianinha gets around 20 mm of rain over 7.7 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 26% and peaks near 31% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
131
231
331
431
530
630
729
829
929
1028
1128
1228
1327
1427
1526
1626
1726
1825
1925
2024
2124
2223
2323
2422
2522
2621
2721
2821
2921
3021

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 71% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
117425
227325
327424
427424
527424
627424
727424
827424
927325
1017425
1117326
1217326
1317227
1417227
1517128
1617029
1717029
1816930
1916930
2016831
2116831
2216831
2316831
2416831
2516732
2616732
2716732
2816732
2916633
3016633

Wind in September

Winds average 17 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 17 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze

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 5:24 AM to 5:09 AM, and sunset from 5:17 PM to 5:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:245:17
211.95:245:17
311.95:235:17
411.95:235:16
511.95:225:16
611.95:225:16
711.95:215:16
811.95:215:16
911.95:205:16
1011.95:195:15
1111.95:195:15
1211.95:185:15
1311.95:185:15
1412.05:175:15
1512.05:175:14
1612.05:165:14
1712.05:165:14
1812.05:155:14
1912.05:155:14
2012.05:145:13
2112.05:135:13
2212.05:135:13
2312.05:125:13
2412.05:125:13
2512.05:115:12
2612.05:115:12
2712.05:105:12
2812.05:105:12
2912.05:095:12
3012.05:095:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.85 kWh/m².

For context, solar energy here swings from a low near 4.36 kWh/m² to a high of 6.25 kWh/m² in November across the year — September's 5.85 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
216.0Bright
226.0Bright
236.0Bright
246.0Intense
256.0Intense
266.0Intense
276.1Intense
286.1Intense
296.1Intense
306.1Intense
Planning a trip in September

Hazard calendar for Goianinha

In seasonPeak

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

Goianinha's rainy season runs February–July, 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 Goianinha?

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

6.1
Sightseeing
2nd-best month of the year
7.6
Beach & pool
2nd-best month of the year

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

What to pack for Goianinha in September

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

In September, Goianinha sees daytime highs around 29°C and nights near 22°C. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

Sea temperature near Goianinha in September

The nearest coast averages about 26°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 39 km away) is warmest in March at about 29°C and coldest in August near 26°C.

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

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb28Tropical
Mar29Tropical
Apr29Tropical
May28Tropical
Jun27Warm
Jul27Warm
Aug26Warm
Sep26Warm
Oct27Warm
Nov27Warm
Dec28Warm

UV index in Goianinha 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 Goianinha peaks around March 11 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 14 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 11UV 15Jul 14UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is Goianinha?

Goianinha sits at 6.3°S, 35.2°W, 32 m above sea level, in Brazil. The nearest listed city is Canguaretama, 15 km away.

Topography around Goianinha

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

Within 3 km, the terrain around Goianinha has only modest variations in elevation — a maximum elevation change of 82 m around an average of 26 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 198 m; within 80 km, large variations in elevation — a maximum elevation change of 634 m.

The land around Goianinha is covered by grassland (71%) within 3 km, grassland (52%) and trees (21%) within 16 km, and grassland (43%) and water (28%) within 80 km.

3 km
82 m
16 km
198 m
80 km
634 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetlandmangroves
September weather nearby: Canguaretama 15 km · Tibau do Sul 16 km · Nísia Floresta 19 km · São José de Mipibu 22 km · Monte Alegre 26 km · Santo Antônio 30 km · Nova Cruz 34 km · Parnamirim 39 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 Goianinha (-6.2662°, -35.2097°, elevation 32 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).