Morretes weather in September

In September, Morretes sees average daytime highs of 22°C and overnight lows near 15°C, with 159 mm of rain across 16.8 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 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 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 Morretes's 8th-clearest and 3rd-windiest month. For the whole year in context, see Morretes's year-round climate.

Daytime high
22°
9th warmest
Overnight low
15°
4th coldest
Rainfall
159 mm
16.8 wet days
Daylight
11 h 54 min
7:14 AM – 7:05 PM
Cloud cover
76%
8th clearest
Wind
6 km/h
3rd windiest
Solar energy
3.64 kWh/m²
Travel score
5.4
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 Morretes reaches about 22°C in the afternoon and slips back to 15°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 28°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)
12215
22215
32215
42215
52215
62215
72215
82215
92215
102215
112215
122215
132215
142215
152215
162215
172215
182215
192215
202215
212215
222215
232216
242216
252216
262216
272216
282216
292216
302216

Morretes 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
Jan28° / 21°32426.413.43.9
Feb28° / 21°3072312.93.8
Mar27° / 20°23223.712.24.4
Apr25° / 18°13016.411.45.6
May23° / 16°12113.710.86.1
Jun22° / 14°10011.110.46.3
Jul21° / 13°10011.610.66.2
Aug22° / 14°8611.211.16.4
Sep22° / 15°15916.811.85.4
Oct24° / 17°17820.412.64.9
Nov25° / 18°1882113.24.8
Dec27° / 20°25122.513.64.4

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 74%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14159
24060
33862
43664
53466
63367
73169
83070
92872
102872
112674
122674
132575
142476
152476
162476
172476
182377
192377
202278
212278
222179
232179
242179
252080
262080
271981
281981
291783
301783

Chance of precipitation in September

Any precipitation

Morretes gets around 159 mm of rain over 16.8 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 55% and peaks near 65% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
142
243
344
445
547
648
749
850
951
1051
1152
1253
1353
1454
1554
1655
1756
1857
1958
2059
2159
2260
2361
2461
2562
2663
2763
2864
2964
3065

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 40% of days. Sticky, muggy-or-worse air turns up on roughly 13% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12033398
22033399
319323910
419313910
519313911
619303911
719303912
819294012
918294012
1018294112
1118294112
1217294112
1317294113
1416294213
1516294113
1616294113
1715304113
1815304114
1915314014
2015314014
2114314014
2214323914
2314323915
2413323915
2513314016
2613314016
2712314017
2812304018
2912304018
3011294019

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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
211.57:307:00
311.57:297:00
411.57:287:01
511.67:267:01
611.67:257:01
711.67:247:02
811.67:237:02
911.77:227:02
1011.77:217:03
1111.77:207:03
1211.87:197:04
1311.87:177:04
1411.87:167:04
1511.87:157:05
1611.97:147:05
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
2412.17:057:08
2512.17:047:09
2612.17:037:09
2712.17:027:10
2812.27:017:10
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 3.64 kWh/m².

For context, solar energy here swings from a low near 2.64 kWh/m² to a high of 5.27 kWh/m² in December across the year — September's 3.64 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
103.7Moderate
113.7Moderate
123.7Moderate
133.7Moderate
143.7Moderate
153.7Moderate
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

Hazard calendar for Morretes

In seasonPeak

In September, Morretes sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Morretes's rainy season runs September–March, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Morretes?

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

5.4
Sightseeing
6th-best month of the year
3.9
Beach & pool
11th-best month of the year

September is a reasonable time to visit Morretes for sightseeing.

What to pack for Morretes in September

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

In September, Morretes sees daytime highs around 22°C and nights near 15°C. Pack rain gear. Worth having: light clothes. About 17 days see rain.

rain gearlight clothes

Sea temperature near Morretes 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 49 km away) is warmest in February at about 27°C and coldest in August near 19°C.

It's comfortable for a long swim from Sep 18 to Jun 29 — about 9.4 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr25Warm
May23Refreshing
Jun21Refreshing
Jul19Cool
Aug19Cool
Sep20Cool
Oct22Refreshing
Nov23Refreshing
Dec25Warm

UV index in Morretes in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Morretes peaks around January 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 20UV 14Jul 11UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr8Very high
May6High
Jun5High
Jul5Moderate
Aug7High
Sep7Very high
Oct10Extreme
Nov12Extreme
Dec13Extreme
Location & terrain

Where is Morretes?

Morretes sits at 25.5°S, 48.8°W, 13 m above sea level, in Brazil. The nearest listed city is Antonina, 13 km away.

Topography around Morretes

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

Within 3 km, the terrain around Morretes has only modest variations in elevation — a maximum elevation change of 180 m around an average of 24 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,546 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,808 m.

The land around Morretes is covered by trees (82%) within 3 km, trees (90%) within 16 km, and trees (71%) within 80 km.

3 km
180 m
16 km
1,546 m
80 km
1,808 m
treesgrasslandcroplandartificial surfaceswatermangroves
September weather nearby: Antonina 13 km · Piraquara 24 km · Quatro Barras 27 km · Campina Grande do Sul 29 km · Paranaguá 31 km · Pinhais 36 km · São José dos Pinhais 38 km · Pontal do Paraná 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 Morretes (-25.4769°, -48.8344°, elevation 13 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).