Petrópolis weather in July

In July, Petrópolis sees average daytime highs of 24°C and overnight lows near 15°C, with 40 mm of rain across 6.6 wet days and about 10.8 hours of daylight. It is the 12th-warmest and 12th-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 46% of the time in July, and the air most often feels comfortable.

Daylight stretches from about 10 h 36 min at the start of July to 10 h 54 min by month's end. Set against the rest of the year, July is Petrópolis's 1st-clearest and 5th-windiest month. For the whole year in context, see Petrópolis's year-round climate.

Daytime high
24°
12th warmest
Overnight low
15°
1st coldest
Rainfall
40 mm
6.6 wet days
Daylight
10 h 42 min
7:36 AM – 6:21 PM
Cloud cover
46%
1st clearest
Wind
6 km/h
5th windiest
Solar energy
3.45 kWh/m²
Travel score
7.8
out of 10

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 24°C through the month.

A typical July day in Petrópolis 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 19°C and 28°C. Set against its neighbours, July runs on par with June and on par with August.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12415
22415
32415
42415
52415
62415
72415
82415
92415
102415
112415
122415
132415
142415
152415
162415
172415
182415
192415
202415
212415
222415
232415
242415
252415
262415
272415
282415
292415
302415
312415

How July really feels in Petrópolis

Once humidity and wind are folded in, July 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

July sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Petrópolis weather by month

How July compares with the rest of the year at a glance. July is the 12th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 21°31522.813.23.7
Feb30° / 21°23118.512.83.9
Mar29° / 21°24422.112.24.2
Apr27° / 19°10514.111.55.8
May25° / 16°701110.96.8
Jun24° / 15°41710.67.6
Jul24° / 15°406.610.87.8
Aug25° / 15°427.211.27.6
Sep26° / 17°8810.711.96.6
Oct26° / 18°13715.112.55.7
Nov27° / 19°2522013.14.8
Dec28° / 21°29623.313.44.1

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in July, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 15% of July, with mostly cloudy or overcast conditions the remaining 39%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26040
36040
46040
56040
66040
76139
86040
96040
106139
116139
126139
136139
146139
156139
166139
176238
186139
196139
206238
216238
226238
236238
246238
256238
266238
276337
286337
296238
306238
316238

Chance of precipitation in July

Any precipitation

Petrópolis gets around 40 mm of rain over 6.6 wet days in July, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 22% and peaks near 23% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
120
221
321
422
522
622
723
823
923
1023
1123
1223
1323
1423
1522
1622
1722
1822
1921
2021
2121
2220
2320
2420
2520
2620
2721
2821
2921
3021
3121

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the comfortable band about 49% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1847432
2847422
3948422
41048411
51148401
61148401
71248391
81249381
91349380
101350370
111450360
121451350
131451350
141452340
151451341
161451341
171451341
181550341
191551331
201551331
211551331
221551331
231650322
241650322
251650322
261749322
271749322
281748332
291747332
301747332
311746342

Wind in July

Winds average 6 km/h in July.

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

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 10 h 36 min at the start of July to 10 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over July. Sunrise moves from 7:37 AM to 7:31 AM, and sunset from 6:15 PM to 6:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.67:376:15
210.67:376:15
310.67:376:16
410.77:376:16
510.77:376:16
610.77:376:17
710.77:376:17
810.77:376:18
910.77:376:18
1010.77:376:18
1110.77:376:19
1210.77:376:19
1310.77:376:19
1410.77:366:20
1510.77:366:20
1610.77:366:21
1710.87:366:21
1810.87:366:21
1910.87:356:22
2010.87:356:22
2110.87:356:23
2210.87:346:23
2310.87:346:24
2410.87:346:24
2510.97:336:24
2610.97:336:25
2710.97:336:25
2810.97:326:26
2910.97:326:26
3010.97:316:27
3110.97:316:27

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 3.45 kWh/m².

For context, solar energy here swings from a low near 3.35 kWh/m² to a high of 5.87 kWh/m² in February across the year — July's 3.45 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.4Moderate
23.4Moderate
33.4Moderate
43.4Moderate
53.4Moderate
63.4Moderate
73.4Moderate
83.4Moderate
93.4Moderate
103.4Moderate
113.4Moderate
123.4Moderate
133.4Moderate
143.4Moderate
153.4Moderate
163.4Moderate
173.4Moderate
183.5Moderate
193.5Moderate
203.5Moderate
213.5Moderate
223.5Moderate
233.5Moderate
243.6Moderate
253.6Moderate
263.6Moderate
273.6Moderate
283.7Moderate
293.7Moderate
303.7Moderate
313.8Moderate
Planning a trip in July

Hazard calendar for Petrópolis

In seasonPeak

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

Petrópolis'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 July a good time to visit Petrópolis?

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

7.8
Sightseeing
1st-best month of the year
6.6
Beach & pool
2nd-best month of the year

July is one of the better times to visit Petrópolis for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Petrópolis in July

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

In July, Petrópolis sees daytime highs around 24°C and nights near 15°C. Worth packing: light clothes. About 7 days see rain.

light clothes

Sea temperature near Petrópolis in July

The nearest coast averages about 22°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 69 km away) is warmest in March at about 25°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°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan25Warm
Feb25Warm
Mar25Warm
Apr25Warm
May24Refreshing
Jun23Refreshing
Jul22Refreshing
Aug21Refreshing
Sep21Refreshing
Oct22Refreshing
Nov23Refreshing
Dec24Warm

UV index in Petrópolis in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Petrópolis peaks around January 24 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 24UV 15Jul 12UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr9Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep7High
Oct12Extreme
Nov14Extreme
Dec14Extreme

Air quality in Petrópolis in July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July falls, not just the annual average.

Air quality in Petrópolis is worst in July — around 38 µg/m³ PM2.5 (poor), about 2.0× the cleanest month (December, 19 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateModerateJul 1237 µg/m³Dec 2319 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb19Moderate
Mar21Moderate
Apr24Moderate
May31Moderate
Jun36Poor
Jul38Poor
Aug32Moderate
Sep37Poor
Oct24Moderate
Nov20Moderate
Dec19Moderate
Location & terrain

Where is Petrópolis?

Petrópolis sits at 22.5°S, 43.2°W, 819 m above sea level, in Brazil. The nearest listed city is Guapimirim, 21 km away.

Topography around Petrópolis

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

Within 3 km, the terrain around Petrópolis has large variations in elevation — a maximum elevation change of 611 m around an average of 927 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,242 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,252 m.

The land around Petrópolis is covered by trees (70%) and artificial surfaces (23%) within 3 km, trees (81%) within 16 km, and trees (47%) and grassland (32%) within 80 km.

3 km
611 m
16 km
2,242 m
80 km
2,252 m
treesgrasslandartificial surfaceswaterwetlandmangroves
July weather nearby: Guapimirim 21 km · Magé 22 km · Teresópolis 23 km · São Pedro 24 km · Paty do Alferes 26 km · Miguel Pereira 30 km · Duque de Caxias 34 km · Belford Roxo 37 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 Petrópolis (-22.505°, -43.1786°, elevation 819 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).