São Bento do Sul weather in September

In September, São Bento do Sul sees average daytime highs of 21°C and overnight lows near 12°C, with 176 mm of rain across 11.6 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 3rd-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 25% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 30 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is São Bento do Sul's 6th-clearest and 1st-windiest month. For the whole year in context, see São Bento do Sul's year-round climate.

Daytime high
21°
8th warmest
Overnight low
12°
5th coldest
Rainfall
176 mm
11.6 wet days
Daylight
11 h 48 min
7:16 AM – 7:07 PM
Cloud cover
69%
6th clearest
Wind
11 km/h
1st windiest
Solar energy
3.97 kWh/m²
Travel score
6.0
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 São Bento do Sul reaches about 21°C in the afternoon and slips back to 12°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 28°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12111
22111
32111
42111
52111
62111
72111
82111
92111
102111
112111
122111
132112
142112
152112
162112
172112
182112
192112
202112
212112
222112
232112
242112
252112
262112
272112
282112
292112
302112

São Bento do Sul weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 17°21122.613.54.7
Feb26° / 17°19020.712.94.6
Mar25° / 17°13218.412.25.4
Apr23° / 14°8511.411.46.4
May20° / 11°1029.710.76.2
Jun19° / 10°1259.810.46.0
Jul19° / 1039.110.56.2
Aug20° / 10°1018.311.16.6
Sep21° / 12°17611.611.86.0
Oct22° / 13°1691612.65.4
Nov23° / 15°13816.513.35.6
Dec25° / 16°17319.313.65.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 9% 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 (%)
14951
24753
34654
44555
54456
64258
74060
83862
93763
103664
113664
123565
133466
143466
153367
163268
173268
183070
193070
203070
212971
222872
232872
242674
252773
262575
272575
282575
292476
302476

Chance of precipitation in September

Any precipitation

São Bento do Sul gets around 176 mm of rain over 11.6 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 38% and peaks near 48% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
129
229
330
430
531
631
732
832
933
1034
1134
1235
1336
1436
1537
1638
1739
1840
1941
2042
2143
2243
2344
2445
2545
2646
2747
2847
2947
3048

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 53% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1633340
2623440
3613450
4603550
5583660
6583660
7573760
8563770
9553870
10553870
11543880
12533980
13513991
14513991
155039101
165138101
175138101
185038111
195038111
205137111
215037121
225037121
235037131
244937130
254837140
264738150
274738150
284638160
294538170
304438180

Wind in September

Winds average 11 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 30 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 42 minutes over September. Sunrise moves from 7:34 AM to 7:00 AM, and sunset from 7:01 PM to 7:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:347:01
211.57:327:01
311.57:317:02
411.57:307:02
511.67:297:03
611.67:287:03
711.67:277:03
811.67:267:04
911.77:257:04
1011.77:237:05
1111.77:227:05
1211.77:217:06
1311.87:207:06
1411.87:197:06
1511.87:187:07
1611.87:167:07
1711.97:157:08
1811.97:147:08
1911.97:137:09
2012.07:127:09
2112.07:117:09
2212.07:097:10
2312.07:087:10
2412.17:077:11
2512.17:067:11
2612.17:057:12
2712.17:047:12
2812.27:037:12
2912.27:017:13
3012.27:007:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.97 kWh/m².

For context, solar energy here swings from a low near 2.72 kWh/m² to a high of 5.47 kWh/m² in December across the year — September's 3.97 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.1Bright
44.1Bright
54.1Bright
64.1Bright
74.1Bright
84.1Bright
94.0Bright
104.0Bright
114.0Bright
124.0Bright
134.0Bright
144.0Bright
154.0Bright
164.0Bright
174.0Bright
184.0Moderate
194.0Moderate
204.0Moderate
214.0Moderate
224.0Moderate
234.0Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.9Moderate
284.0Moderate
294.0Moderate
304.0Moderate
Planning a trip in September

Is September a good time to visit São Bento do Sul?

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

6.0
Sightseeing
5th-best month of the year
3.6
Beach & pool
8th-best month of the year

September is a reasonable time to visit São Bento do Sul for sightseeing.

What to pack for São Bento do Sul in September

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

In September, São Bento do Sul sees daytime highs around 21°C and nights near 12°C. Worth packing: rain gear. About 12 days see rain.

rain gear

UV index in São Bento do Sul in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (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 Bento do Sul peaks around January 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighHighVery highExtremeJan 18UV 14Jul 13UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr8Very high
May6High
Jun5High
Jul5Moderate
Aug6High
Sep9Very high
Oct10Extreme
Nov12Extreme
Dec13Extreme

Air quality in São Bento do Sul 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 São Bento do Sul is worst in September — around 16 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (February, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1115 µg/m³Feb 139 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar9Good
Apr11Good
May12Moderate
Jun12Good
Jul14Moderate
Aug15Moderate
Sep16Moderate
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is São Bento do Sul?

São Bento do Sul sits at 26.3°S, 49.4°W, 863 m above sea level, in Brazil. The nearest listed city is Rio Negrinho, 14 km away.

Topography around São Bento do Sul

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

Within 3 km, the terrain around São Bento do Sul has only modest variations in elevation — a maximum elevation change of 135 m around an average of 861 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 949 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,647 m.

The land around São Bento do Sul is covered by trees (60%) and artificial surfaces (25%) within 3 km, trees (74%) within 16 km, and trees (75%) within 80 km.

3 km
135 m
16 km
949 m
80 km
1,647 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Rio Negrinho 14 km · Corupá 24 km · Schroeder 35 km · Jaraguá do Sul 41 km · Tijucas do Sul 41 km · Quitandinha 44 km · Rio Negro 45 km · Guaramirim 45 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 Bento do Sul (-26.2503°, -49.3786°, elevation 863 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. 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).