Ilhota weather in September

In September, Ilhota sees average daytime highs of 21°C and overnight lows near 16°C, with 153 mm of rain across 12.9 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 21°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 Ilhota's 11th-clearest and 5th-windiest month. For the whole year in context, see Ilhota's year-round climate.

Daytime high
21°
9th warmest
Overnight low
16°
4th coldest
Rainfall
153 mm
12.9 wet days
Daylight
11 h 48 min
7:14 AM – 7:05 PM
Cloud cover
71%
11th clearest
Wind
10 km/h
5th windiest
Solar energy
3.65 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 21°C through the month.

A typical September day in Ilhota reaches about 21°C in the afternoon and slips back to 16°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 24°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C cooler than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12115
22115
32115
42115
52115
62115
72115
82115
92115
102115
112115
122115
132115
142115
152115
162116
172116
182116
192116
202116
212116
222116
232116
242116
252116
262116
272116
282116
292116
302116

Ilhota 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
Jan27° / 22°21521.813.54.7
Feb27° / 22°19419.5134.7
Mar26° / 21°14719.512.25.2
Apr25° / 19°9812.611.46.4
May22° / 16°11511.610.76.4
Jun20° / 14°1099.810.36.3
Jul19° / 13°9810.410.56.1
Aug20° / 14°989.911.16.3
Sep21° / 16°15312.911.85.8
Oct22° / 17°14315.412.65.6
Nov24° / 19°14316.913.35.7
Dec26° / 21°15718.413.75.2

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 15% of September, with mostly cloudy or overcast conditions the remaining 66%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14654
24555
34456
44357
54258
63961
73961
83763
93763
103466
113466
123466
133367
143268
153268
163268
173268
183268
193169
203268
213169
223070
233070
242971
252971
262971
272773
282773
292773
302674

Chance of precipitation in September

Any precipitation

Ilhota gets around 153 mm of rain over 12.9 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 42% and peaks near 50% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
134
234
335
436
536
637
738
838
939
1039
1140
1241
1341
1442
1542
1643
1743
1844
1944
2045
2146
2246
2347
2448
2548
2649
2749
2850
2950
3050

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 41% of days. Sticky, muggy-or-worse air turns up on roughly 9% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12629405
22629406
32529406
42529406
52528407
62528407
72528417
82427417
92427418
102427428
112426428
122326428
132326429
142326439
152325439
162325429
1723254210
1823264210
1923264110
2023264110
2123264110
2222274111
2322274111
2421274111
2521274112
2620274112
2720264113
2819264113
2919264114
3018264114

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 6:58 AM, and sunset from 6:58 PM to 7:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:326:58
211.57:316:59
311.57:306:59
411.57:287:00
511.57:277:00
611.67:267:01
711.67:257:01
811.67:247:01
911.77:237:02
1011.77:217:02
1111.77:207:03
1211.77:197:03
1311.87:187:04
1411.87:177:04
1511.87:167:04
1611.87:147:05
1711.97:137:05
1811.97:127:06
1911.97:117:06
2012.07:107:07
2112.07:087:07
2212.07:077:08
2312.07:067:08
2412.17:057:09
2512.17:047:09
2612.17:037:09
2712.17:017:10
2812.27:007:10
2912.26:597:11
3012.26:587:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.65 kWh/m².

For context, solar energy here swings from a low near 2.55 kWh/m² to a high of 5.54 kWh/m² in December across the year — September's 3.65 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.7Moderate
33.7Moderate
43.7Moderate
53.7Moderate
63.7Moderate
73.7Moderate
83.6Moderate
93.6Moderate
103.6Moderate
113.6Moderate
123.6Moderate
133.6Moderate
143.6Moderate
153.6Moderate
163.7Moderate
173.7Moderate
183.7Moderate
193.7Moderate
203.7Moderate
213.7Moderate
223.7Moderate
233.7Moderate
243.7Moderate
253.7Moderate
263.7Moderate
273.7Moderate
283.7Moderate
293.7Moderate
303.7Moderate
Planning a trip in September

Is September a good time to visit Ilhota?

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
3.4
Beach & pool
9th-best month of the year

September is a reasonable time to visit Ilhota for sightseeing.

What to pack for Ilhota in September

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

In September, Ilhota sees daytime highs around 21°C and nights near 16°C. Worth packing: rain gear. About 13 days see rain.

rain gear

Sea temperature near Ilhota 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 20 km away) is warmest in February at about 27°C and coldest in August near 18°C.

It's comfortable for a long swim from Sep 30 to Jun 16 — about 8.5 months when the water holds above 20°C.

20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb27Warm
Mar26Warm
Apr25Warm
May22Refreshing
Jun20Refreshing
Jul18Cool
Aug18Cool
Sep19Cool
Oct21Refreshing
Nov23Refreshing
Dec25Warm

UV index in Ilhota in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ilhota peaks around January 18 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 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 13Jul 12UV 5
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May5High
Jun5Moderate
Jul5Moderate
Aug6High
Sep8Very high
Oct10Very high
Nov12Extreme
Dec13Extreme
Location & terrain

Where is Ilhota?

Ilhota sits at 26.9°S, 48.8°W, 8 m above sea level, in Brazil. The nearest listed city is Gaspar, 14 km away.

Topography around Ilhota

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

Within 3 km, the terrain around Ilhota has significant variations in elevation — a maximum elevation change of 332 m around an average of 20 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 806 m; within 80 km, large variations in elevation — a maximum elevation change of 1,138 m.

The land around Ilhota is covered by grassland (52%) within 3 km, trees (52%) and grassland (27%) within 16 km, and trees (60%) and water (27%) within 80 km.

3 km
332 m
16 km
806 m
80 km
1,138 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Gaspar 14 km · Itajaí 16 km · Navegantes 17 km · Balneário Piçarras 22 km · Balneário Camboriú 22 km · Camboriú 22 km · Penha 23 km · Brusque 24 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 Ilhota (-26.8997°, -48.8272°, elevation 8 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).