Biguaçu weather in September

In September, Biguaçu sees average daytime highs of 22°C and overnight lows near 14°C, with 150 mm of rain across 13.5 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 19% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 24 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Biguaçu's 8th-clearest and 3rd-windiest month. For the whole year in context, see Biguaçu's year-round climate.

Daytime high
22°
9th warmest
Overnight low
14°
5th coldest
Rainfall
150 mm
13.5 wet days
Daylight
11 h 48 min
7:14 AM – 7:04 PM
Cloud cover
73%
8th clearest
Wind
8 km/h
3rd windiest
Solar energy
3.75 kWh/m²
Travel score
5.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical September day in Biguaçu reaches about 22°C in the afternoon and slips back to 14°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 27°C. Set against its neighbours, September runs on par with August and about 2°C cooler than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12213
22213
32213
42213
52214
62214
72214
82214
92214
102214
112214
122214
132214
142214
152214
162214
172214
182214
192214
202214
212214
222214
232214
242214
252214
262214
272215
282215
292215
302215

Biguaçu weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 20°23422.613.54.4
Feb28° / 20°21320.3134.4
Mar27° / 19°14919.612.25.0
Apr25° / 17°9512.211.46.4
May22° / 14°11310.810.76.6
Jun21° / 12°969.610.36.4
Jul20° / 11°899.510.46.4
Aug21° / 12°909.3116.6
Sep22° / 14°15013.511.85.8
Oct23° / 16°14315.512.75.6
Nov25° / 17°14716.613.45.5
Dec27° / 19°16718.913.75.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 70%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14159
24060
34060
43862
53763
63565
73466
83367
93268
103268
113070
123169
133169
143070
152971
162971
172971
182773
192773
202773
212674
222674
232674
242674
252476
262377
272278
282278
292179
302179

Chance of precipitation in September

Any precipitation

Biguaçu gets around 150 mm of rain over 13.5 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 44% and peaks near 51% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
134
234
335
436
537
638
739
840
941
1041
1142
1243
1344
1444
1545
1645
1746
1847
1947
2048
2148
2249
2350
2450
2550
2651
2751
2851
2951
3051

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 34% of days. Sticky, muggy-or-worse air turns up on roughly 5% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13432313
23432323
33331323
43331333
53331333
63331334
73230344
83230344
93230344
103230344
113130354
123130354
133130354
143030355
153030355
163030355
173030355
183030356
193030346
203030346
213030346
223030336
232930347
242930347
252830347
262830348
272730358
282730358
292630358
302630359

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 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
17calm
27calm
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 24 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 48 minutes over September. Sunrise moves from 7:32 AM to 6:57 AM, and sunset from 6:57 PM to 7:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:326:57
211.57:306:58
311.57:296:58
411.57:286:59
511.57:276:59
611.67:266:59
711.67:257:00
811.67:237:00
911.67:227:01
1011.77:217:01
1111.77:207:02
1211.77:197:02
1311.87:177:03
1411.87:167:03
1511.87:157:04
1611.87:147:04
1711.97:137:05
1811.97:117:05
1911.97:107:06
2012.07:097:06
2112.07:087:06
2212.07:077:07
2312.07:057:07
2412.17:047:08
2512.17:037:08
2612.17:027:09
2712.17:017:09
2812.26:597:10
2912.26:587:10
3012.26:577:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.75 kWh/m².

For context, solar energy here swings from a low near 2.61 kWh/m² to a high of 5.61 kWh/m² in December across the year — September's 3.75 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.8Moderate
43.8Moderate
53.8Moderate
63.8Moderate
73.8Moderate
83.8Moderate
93.7Moderate
103.7Moderate
113.7Moderate
123.7Moderate
133.7Moderate
143.7Moderate
153.7Moderate
163.8Moderate
173.8Moderate
183.8Moderate
193.8Moderate
203.8Moderate
213.8Moderate
223.8Moderate
233.8Moderate
243.8Moderate
253.8Moderate
263.8Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Is September a good time to visit Biguaçu?

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

5.8
Sightseeing
6th-best month of the year
3.9
Beach & pool
10th-best month of the year

September is a reasonable time to visit Biguaçu for sightseeing.

What to pack for Biguaçu in September

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

In September, Biguaçu sees daytime highs around 22°C and nights near 14°C. Worth packing: rain gear. About 14 days see rain.

rain gear

Sea temperature near Biguaçu in September

The nearest coast averages about 19°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 31 km away) is warmest in February at about 26°C and coldest in August near 18°C.

It's comfortable for a long swim from Oct 6 to Jun 10 — about 8.2 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar25Warm
Apr24Warm
May22Refreshing
Jun20Cool
Jul18Cool
Aug18Cool
Sep19Cool
Oct21Refreshing
Nov23Refreshing
Dec24Warm

UV index in Biguaçu 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 Biguaçu peaks around January 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 18UV 14Jul 11UV 5
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May5High
Jun5Moderate
Jul5Moderate
Aug6High
Sep8Very high
Oct9Very high
Nov12Extreme
Dec13Extreme
Location & terrain

Where is Biguaçu?

Biguaçu sits at 27.5°S, 48.7°W, 6 m above sea level, in Brazil. The nearest listed city is Campinas, 12 km away.

Topography around Biguaçu

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

Within 3 km, the terrain around Biguaçu has significant variations in elevation — a maximum elevation change of 394 m around an average of 48 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 595 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,813 m.

The land around Biguaçu is covered by trees (37%), artificial surfaces (21%) and water (21%) within 3 km, trees (47%) and water (26%) within 16 km, and trees (52%) and water (35%) within 80 km.

3 km
394 m
16 km
595 m
80 km
1,813 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Campinas 12 km · São José 14 km · Florianopolis 15 km · Trindade 17 km · Palhoça 17 km · Pantanal 19 km · Governador Celso Ramos 22 km · Santo Amaro da Imperatriz 25 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 Biguaçu (-27.4942°, -48.6556°, 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. 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).