Cunha weather in September

In September, Cunha sees average daytime highs of 24°C and overnight lows near 15°C, with 85 mm of rain across 11.3 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 24°C through the month. The sky is clear or mostly clear about 34% of the time in September, and the air most often feels comfortable.

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 Cunha's 6th-clearest and 1st-windiest month. For the whole year in context, see Cunha's year-round climate.

Daytime high
24°
8th warmest
Overnight low
15°
5th coldest
Rainfall
85 mm
11.3 wet days
Daylight
11 h 54 min
6:58 AM – 6:50 PM
Cloud cover
57%
6th clearest
Wind
6 km/h
1st windiest
Solar energy
4.73 kWh/m²
Travel score
6.8
out of 10

Cunha 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 24°C through the month.

A typical September day in Cunha reaches about 24°C in the afternoon and slips back to 15°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 29°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)
12414
22414
32414
42414
52414
62414
72414
82414
92414
102415
112415
122415
132415
142415
152415
162415
172415
182415
192415
202415
212415
222415
232415
242415
252415
262415
272415
282415
292415
302415

Cunha weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 19°26825.913.34.1
Feb27° / 19°18421.512.84.4
Mar26° / 18°17322.112.24.8
Apr25° / 17°7812.911.56.4
May23° / 14°589.410.96.9
Jun22° / 13°366.510.67.4
Jul22° / 12°446.210.77.4
Aug23° / 13°386.511.27.7
Sep24° / 15°8511.311.96.8
Oct25° / 16°11316.512.55.7
Nov25° / 17°15419.713.15.1
Dec26° / 18°2142313.44.5

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 15% of September, with mostly cloudy or overcast conditions the remaining 50%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16337
26238
36139
46040
56040
65941
75842
85644
95545
105446
115347
125347
135248
145149
155149
165050
174951
184852
194654
204555
214555
224456
234456
244258
254159
264060
273961
283961
293763
303763

Chance of precipitation in September

Any precipitation

Cunha gets around 85 mm of rain over 11.3 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 37% and peaks near 50% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
127
227
328
428
529
629
730
830
931
1031
1132
1232
1333
1433
1534
1635
1736
1838
1939
2040
2142
2243
2344
2446
2547
2648
2748
2849
2950
3050

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 48% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1464690
2454690
34447100
44247100
54147110
64048120
73948130
83849140
93749140
103549150
113450160
123250180
133150190
142951200
152851210
162751220
172651230
182650240
192550250
202449260
212449270
222348281
232248291
242247301
252146311
262145332
272045342
281944352
291943362
301842372

Wind in September

Winds average 6 km/h in September, the windiest month of the year.

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
126calm
136calm
146calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
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 7:14 AM to 6:43 AM, and sunset from 6:45 PM to 6:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:146:45
211.67:136:46
311.67:126:46
411.67:116:46
511.67:106:47
611.67:096:47
711.77:086:47
811.77:076:48
911.77:056:48
1011.77:046:48
1111.87:036:49
1211.87:026:49
1311.87:016:49
1411.87:006:50
1511.86:596:50
1611.96:586:50
1711.96:576:51
1811.96:566:51
1911.96:556:51
2012.06:546:51
2112.06:536:52
2212.06:526:52
2312.06:516:52
2412.16:506:53
2512.16:496:53
2612.16:486:53
2712.16:476:54
2812.16:466:54
2912.26:456:54
3012.26:436:55

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.73 kWh/m².

For context, solar energy here swings from a low near 3.46 kWh/m² to a high of 5.65 kWh/m² in February across the year — September's 4.73 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Hazard calendar for Cunha

In seasonPeak

None of Cunha's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Cunha's rainy season runs November–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 Cunha?

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

6.8
Sightseeing
5th-best month of the year
5.8
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Cunha for sightseeing.

What to pack for Cunha in September

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

In September, Cunha sees daytime highs around 24°C and nights near 15°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Cunha in September

The nearest coast averages about 22°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 35 km away) is warmest in February at about 27°C and coldest in August near 21°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb27Warm
Mar27Warm
Apr26Warm
May24Refreshing
Jun23Refreshing
Jul22Refreshing
Aug21Refreshing
Sep22Refreshing
Oct22Refreshing
Nov23Refreshing
Dec25Warm

UV index in Cunha 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 Cunha peaks around January 21 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 21UV 14Jul 11UV 5
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Cunha 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 Cunha is worst in September — around 18 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (March, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1517 µg/m³Mar 149 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb9Good
Mar9Good
Apr10Good
May12Good
Jun13Moderate
Jul13Moderate
Aug14Moderate
Sep18Moderate
Oct12Moderate
Nov10Good
Dec9Good
Location & terrain

Where is Cunha?

Cunha sits at 23.1°S, 45.0°W, 953 m above sea level, in Brazil. The nearest listed city is Paraty, 30 km away.

Topography around Cunha

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

Within 3 km, the terrain around Cunha has significant variations in elevation — a maximum elevation change of 269 m around an average of 940 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 945 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,761 m.

The land around Cunha is covered by grassland (60%) and trees (32%) within 3 km, grassland (61%) and trees (38%) within 16 km, and trees (45%), grassland (26%) and water (26%) within 80 km.

3 km
269 m
16 km
945 m
80 km
2,761 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Paraty 30 km · Guaratinguetá 37 km · Aparecida 37 km · Potim 39 km · Ubatuba 42 km · Lorena 42 km · Cachoeira Paulista 46 km · Pindamonhangaba 54 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 Cunha (-23.0744°, -44.9597°, elevation 953 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).