Laguna weather in September

In September, Laguna sees average daytime highs of 19°C and overnight lows near 17°C, with 129 mm of rain across 11.9 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 19°C through the month. The sky is clear or mostly clear about 34% 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 Laguna's 11th-clearest and 1st-windiest month. For the whole year in context, see Laguna's year-round climate.

Daytime high
19°
9th warmest
Overnight low
17°
4th coldest
Rainfall
129 mm
11.9 wet days
Daylight
11 h 48 min
7:14 AM – 7:04 PM
Cloud cover
60%
11th clearest
Wind
21 km/h
1st windiest
Solar energy
4.34 kWh/m²
Travel score
5.8
out of 10

Laguna 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 19°C through the month.

A typical September day in Laguna reaches about 19°C in the afternoon and slips back to 17°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 22°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)
11916
21916
31916
41916
51916
61916
71916
81916
91916
101916
111916
121916
131917
141917
151917
161917
171917
181917
191917
201917
211917
221917
231917
241917
251917
261917
271917
281917
291917
302017

Laguna 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
Jan25° / 23°13414.113.66.2
Feb25° / 23°10413.6136.1
Mar25° / 23°11614.712.26.2
Apr23° / 21°9810.911.36.8
May21° / 18°13611.310.66.4
Jun19° / 16°1099.910.26.2
Jul18° / 15°10410.110.46.0
Aug18° / 15°10810.1116.2
Sep19° / 17°12911.911.85.8
Oct21° / 18°13013.912.75.7
Nov22° / 20°10912.313.46.4
Dec24° / 22°9511.413.86.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 54%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15446
25248
35149
45050
55050
64852
74753
84852
94753
104753
114753
124753
134654
144753
154654
164753
174753
184654
194555
204555
214654
224555
234456
244456
254456
264456
274258
284258
294159
304159

Chance of precipitation in September

Any precipitation

Laguna gets around 129 mm of rain over 11.9 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 40% and peaks near 47% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
131
232
332
433
533
634
734
835
935
1036
1137
1237
1338
1439
1540
1640
1741
1842
1942
2043
2144
2244
2345
2446
2546
2646
2747
2847
2947
3047

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 5% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12731393
22730393
32630403
42630403
52630403
62630404
72630414
82630414
92530414
102530414
112530414
122530424
132529424
142429424
152429434
162529424
172528425
182528425
192528415
202528416
212529416
222428416
232428417
242328417
252328428
262228428
272228429
282127429
2921274210
3020274211

Wind in September

Winds average 21 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 21 km/h on the calmest days to 21 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
121breezy
221breezy
321breezy
421breezy
521breezy
621breezy
721breezy
821breezy
921breezy
1021breezy
1121breezy
1221breezy
1321breezy
1421breezy
1521breezy
1621breezy
1721breezy
1821breezy
1921breezy
2021breezy
2121breezy
2221breezy
2321breezy
2421breezy
2521breezy
2621breezy
2721breezy
2821breezy
2921breezy
3021breezy

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 6:57 AM, and sunset from 6:57 PM to 7:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:336:57
211.47:326:57
311.57:306:58
411.57:296:58
511.57:286:59
611.57:276:59
711.67:267:00
811.67:247:00
911.67:237:01
1011.77:227:01
1111.77:217:02
1211.77:197:02
1311.77:187:03
1411.87:177:03
1511.87:167:04
1611.87:147:04
1711.97:137:05
1811.97:127:05
1911.97:117:06
2011.97:097:06
2112.07:087:07
2212.07:077:07
2312.07:067:08
2412.17:057:08
2512.17:037:09
2612.17:027:10
2712.27:017:10
2812.27:007:11
2912.26:587:11
3012.26:577:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.34 kWh/m².

For context, solar energy here swings from a low near 2.75 kWh/m² to a high of 6.63 kWh/m² in December across the year — September's 4.34 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.2Bright
34.2Bright
44.2Bright
54.2Bright
64.2Bright
74.2Bright
84.2Bright
94.2Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.4Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.6Bright
Planning a trip in September

Is September a good time to visit Laguna?

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

5.8
Sightseeing
11th-best month of the year
2.6
Beach & pool
10th-best month of the year

September is a reasonable time to visit Laguna for sightseeing.

What to pack for Laguna in September

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

In September, Laguna sees daytime highs around 19°C and nights near 17°C. Worth packing: rain gear and a windbreaker. About 12 days see rain.

rain geara windbreaker

Sea temperature near Laguna in September

The nearest coast averages about 18°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 18 km away) is warmest in February at about 25°C and coldest in August near 17°C.

It's comfortable for a long swim from Oct 23 to Jun 1 — about 7.3 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan25Warm
Feb25Warm
Mar25Warm
Apr24Refreshing
May21Refreshing
Jun19Cool
Jul17Cool
Aug17Cool
Sep18Cool
Oct20Cool
Nov21Refreshing
Dec23Refreshing

UV index in Laguna 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 Laguna peaks around January 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 22UV 13Jul 10UV 4
UV index (midday)Level
Jan13Extreme
Feb13Extreme
Mar10Extreme
Apr8Very high
May5Moderate
Jun4Moderate
Jul4Moderate
Aug6High
Sep8Very high
Oct10Very high
Nov12Extreme
Dec12Extreme
Location & terrain

Where is Laguna?

Laguna sits at 28.5°S, 48.8°W, 7 m above sea level, in Brazil. The nearest listed city is Capivari de Baixo, 18 km away.

Topography around Laguna

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

Within 3 km, the terrain around Laguna has only modest variations in elevation — a maximum elevation change of 131 m around an average of 6 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 384 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,794 m.

The land around Laguna is covered by water (55%) within 3 km, water (63%) within 16 km, and water (41%) and trees (39%) within 80 km.

3 km
131 m
16 km
384 m
80 km
1,794 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Capivari de Baixo 18 km · Tubarão 22 km · Jaguaruna 28 km · Imbituba 29 km · Braço do Norte 44 km · Morro da Fumaça 46 km · Orleans 52 km · Urussanga 53 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 Laguna (-28.4825°, -48.7808°, elevation 7 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).