Indaial weather in September

In September, Indaial sees average daytime highs of 22°C and overnight lows near 13°C, with 168 mm of rain across 13.5 wet days and about 11.8 hours of daylight. It is the 8th-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 17% of the time in September, and the air most often feels comfortable.

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 Indaial's 8th-clearest and 3rd-windiest month. For the whole year in context, see Indaial's year-round climate.

Daytime high
22°
8th warmest
Overnight low
13°
5th coldest
Rainfall
168 mm
13.5 wet days
Daylight
11 h 48 min
7:16 AM – 7:07 PM
Cloud cover
74%
8th clearest
Wind
7 km/h
3rd windiest
Solar energy
3.62 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 Indaial reaches about 22°C in the afternoon and slips back to 13°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 about 1°C warmer than August and about 2°C cooler than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12213
22213
32213
42213
52213
62213
72213
82213
92213
102213
112213
122113
132113
142113
152113
162113
172114
182114
192114
202114
212114
222114
232114
242114
252114
262214
272214
282214
292214
302214

Indaial weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 20°24222.513.54.4
Feb28° / 20°21820.2134.5
Mar27° / 19°14819.212.25.1
Apr25° / 16°9611.811.46.4
May21° / 13°11211.110.76.4
Jun20° / 12°11410.310.36.1
Jul19° / 11°10410.610.56.1
Aug21° / 12°10010.111.16.4
Sep22° / 13°16813.511.85.8
Oct23° / 15°16117.312.65.4
Nov25° / 17°15518.313.35.3
Dec27° / 18°18919.813.74.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% 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 72%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24258
33961
43862
53664
63664
73367
83268
93268
102971
112971
122971
132773
142773
152674
162674
172575
182476
192476
202476
212377
222377
232377
242377
252278
262278
272179
282179
292080
301981

Chance of precipitation in September

Any precipitation

Indaial gets around 168 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 45% and peaks near 53% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
135
235
336
436
537
638
738
839
940
1041
1142
1242
1343
1444
1544
1645
1746
1846
1947
2048
2149
2249
2350
2451
2551
2652
2752
2853
2953
3053

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the comfortable band about 33% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13235294
23234304
33234304
43134305
53133315
63133315
73133315
83132315
93132316
103032326
113032326
122933326
132933327
142933327
152833327
162833327
172833318
182833318
192833318
202833318
212833318
222833318
232733318
242733318
252633329
262633329
272533339
282533339
292433349
302433349

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 7:33 AM to 6:59 AM, and sunset from 7:00 PM to 7:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:337:00
211.57:327:00
311.57:317:01
411.57:307:01
511.57:297:02
611.67:287:02
711.67:277:03
811.67:257:03
911.77:247:03
1011.77:237:04
1111.77:227:04
1211.77:217:05
1311.87:207:05
1411.87:187:06
1511.87:177:06
1611.87:167:07
1711.97:157:07
1811.97:147:07
1911.97:127:08
2012.07:117:08
2112.07:107:09
2212.07:097:09
2312.07:087:10
2412.17:067:10
2512.17:057:11
2612.17:047:11
2712.17:037:12
2812.27:027:12
2912.27:017:12
3012.26:597:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.62 kWh/m².

For context, solar energy here swings from a low near 2.49 kWh/m² to a high of 5.41 kWh/m² in December across the year — September's 3.62 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
83.7Moderate
93.7Moderate
103.6Moderate
113.6Moderate
123.6Moderate
133.6Moderate
143.6Moderate
153.6Moderate
163.6Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.6Moderate
213.6Moderate
223.6Moderate
233.6Moderate
243.6Moderate
253.6Moderate
263.6Moderate
273.6Moderate
283.6Moderate
293.6Moderate
303.7Moderate
Planning a trip in September

Is September a good time to visit Indaial?

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
3.8
Beach & pool
9th-best month of the year

September is a reasonable time to visit Indaial for sightseeing.

What to pack for Indaial in September

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

In September, Indaial sees daytime highs around 22°C and nights near 13°C. Worth packing: rain gear. About 14 days see rain.

rain gear

Sea temperature near Indaial 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 60 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 Indaial 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 Indaial peaks around January 19 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 19UV 14Jul 11UV 5
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May6High
Jun5Moderate
Jul5Moderate
Aug6High
Sep8Very high
Oct10Very high
Nov12Extreme
Dec13Extreme

Air quality in Indaial in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Indaial is worst in September — around 15 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (December, 10 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 915 µg/m³Dec 1710 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb10Good
Mar10Good
Apr11Good
May13Moderate
Jun13Moderate
Jul14Moderate
Aug15Moderate
Sep15Moderate
Oct12Good
Nov10Good
Dec10Good
Location & terrain

Where is Indaial?

Indaial sits at 26.9°S, 49.2°W, 66 m above sea level, in Brazil. The nearest listed city is Timbó, 9.0 km away.

Topography around Indaial

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

Within 3 km, the terrain around Indaial has significant variations in elevation — a maximum elevation change of 297 m around an average of 89 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 752 m; within 80 km, large variations in elevation — a maximum elevation change of 1,180 m.

The land around Indaial is covered by trees (50%) and artificial surfaces (28%) within 3 km, trees (77%) within 16 km, and trees (74%) within 80 km.

3 km
297 m
16 km
752 m
80 km
1,180 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Timbó 9.0 km · Blumenau 17 km · Pomerode 18 km · Gaspar 27 km · Ibirama 33 km · Guabiruba 34 km · Brusque 39 km · Massaranduba 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 Indaial (-26.8978°, -49.2317°, elevation 66 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).