Joinville weather in September

In September, Joinville sees average daytime highs of 23°C and overnight lows near 16°C, with 145 mm of rain across 14.6 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 17% of the time in September, and the air most often feels humid.

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

Daytime high
23°
9th warmest
Overnight low
16°
4th coldest
Rainfall
145 mm
14.6 wet days
Daylight
11 h 48 min
7:14 AM – 7:05 PM
Cloud cover
75%
8th clearest
Wind
7 km/h
3rd windiest
Solar energy
3.49 kWh/m²
Travel score
5.8
out of 10

Joinville 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 23°C through the month.

A typical September day in Joinville reaches about 23°C in the afternoon and slips back to 16°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 27°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12315
22315
32315
42315
52315
62315
72315
82315
92315
102316
112316
122316
132316
142316
152316
162316
172316
182316
192316
202316
212316
222316
232316
242316
252316
262316
272316
282316
292316
302316

How September really feels in Joinville

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.

Joinville weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 22°27924.413.53.6
Feb29° / 22°25521.612.93.6
Mar28° / 21°20222.412.24.3
Apr26° / 19°11614.111.45.8
May24° / 16°10712.210.76.5
Jun22° / 14°1041010.46.6
Jul21° / 13°899.910.56.5
Aug22° / 14°879.311.16.7
Sep23° / 16°14514.611.85.8
Oct24° / 18°14917.312.65.4
Nov26° / 19°16117.713.35.1
Dec28° / 21°19320.713.64.3

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 9% of September, with mostly cloudy or overcast conditions the remaining 75%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14159
23961
33862
43664
53565
63268
73169
83070
92872
102773
112674
122674
132575
142476
152476
162476
172377
182278
192179
202179
212080
222080
232080
242080
251981
261882
271882
281981
291882
301783

Chance of precipitation in September

Any precipitation

Joinville gets around 145 mm of rain over 14.6 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 48% and peaks near 56% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
138
239
340
441
542
643
744
844
945
1045
1146
1246
1346
1447
1547
1647
1748
1848
1949
2050
2150
2251
2352
2453
2553
2654
2755
2855
2956
3056

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 17% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1212642110
2212642110
3202641120
4202641130
5202641140
6202540140
7202540150
8192540160
9192540160
10192441160
11182441170
12172441170
13172441170
14172441180
15162441180
16162441180
17162441180
18162541180
19162540180
20162640180
21152640180
22152640181
23142640181
24142641181
25132641191
26132641191
27132641201
28122541201
29122541211
30122541221

Wind in September

Winds average 7 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.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
308calm

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 7:31 AM to 6:58 AM, and sunset from 6:59 PM to 7:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:316:59
211.57:306:59
311.57:297:00
411.57:287:00
511.67:277:00
611.67:267:01
711.67:257:01
811.67:247:02
911.77:227:02
1011.77:217:03
1111.77:207:03
1211.77:197:03
1311.87:187:04
1411.87:177:04
1511.87:157:05
1611.87:147:05
1711.97:137:06
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
2712.17:027:10
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 3.49 kWh/m².

For context, solar energy here swings from a low near 2.53 kWh/m² to a high of 5.23 kWh/m² in December across the year — September's 3.49 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.5Moderate
33.5Moderate
43.5Moderate
53.5Moderate
63.5Moderate
73.5Moderate
83.5Moderate
93.5Moderate
103.5Moderate
113.5Moderate
123.5Moderate
133.5Moderate
143.5Moderate
153.5Moderate
163.5Moderate
173.5Moderate
183.5Moderate
193.5Moderate
203.5Moderate
213.5Moderate
223.5Moderate
233.5Moderate
243.5Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.5Moderate
293.5Moderate
303.6Moderate
Planning a trip in September

Is September a good time to visit Joinville?

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

5.8
Sightseeing
5th-best month of the year
4.5
Beach & pool
11th-best month of the year

September is a reasonable time to visit Joinville for sightseeing.

What to pack for Joinville in September

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

In September, Joinville sees daytime highs around 23°C and nights near 16°C. Pack rain gear. Worth having: light clothes. About 15 days see rain.

rain gearlight clothes

Sea temperature near Joinville in September

The nearest coast averages about 20°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 23 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 26 to Jun 19 — about 8.8 months when the water holds above 20°C.

20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar26Warm
Apr25Warm
May22Refreshing
Jun20Refreshing
Jul19Cool
Aug18Cool
Sep20Cool
Oct21Refreshing
Nov23Refreshing
Dec25Warm

UV index in Joinville 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 Joinville peaks around January 18 at about 14 (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 14Jul 12UV 5
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May6High
Jun5High
Jul5Moderate
Aug6High
Sep9Very high
Oct10Very high
Nov12Extreme
Dec13Extreme

Air quality in Joinville 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 Joinville is worst in August — around 15 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (February, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1115 µg/m³Feb 229 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar9Good
Apr10Good
May12Good
Jun14Moderate
Jul15Moderate
Aug15Moderate
Sep14Moderate
Oct12Good
Nov9Good
Dec9Good
Location & terrain

Where is Joinville?

Joinville sits at 26.3°S, 48.8°W, 9 m above sea level, in Brazil. The nearest listed city is Araquari, 14 km away.

Topography around Joinville

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

Within 3 km, the terrain around Joinville has only modest variations in elevation — a maximum elevation change of 225 m around an average of 26 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 952 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,647 m.

The land around Joinville is covered by artificial surfaces (58%) and trees (35%) within 3 km, trees (52%) within 16 km, and trees (60%) and water (26%) within 80 km.

3 km
225 m
16 km
952 m
80 km
1,647 m
treesgrasslandcroplandartificial surfaceswatermangroves
September weather nearby: Araquari 14 km · São Francisco do Sul 22 km · Guaramirim 24 km · Schroeder 26 km · Jaraguá do Sul 30 km · Garuva 31 km · Itapoá 31 km · Massaranduba 38 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 Joinville (-26.3044°, -48.8456°, elevation 9 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).