Climate and average weather in Franco da Rocha

In Franco da Rocha, the weather is humid, warm, wet, and partly cloudy and remarkably steady, with daytime highs holding near warm levels all year. The wettest stretch peaks around January.

Best: mid April to late September

Over the course of the year, the temperature in Franco da Rocha typically varies from 12°C to 28°C, and is rarely below 8°C or above 32°C. February is the hottest month of the year, while June is the coldest.

Based on the travel score, the best time of year to visit Franco da Rocha for warm-weather activities is from mid April to late September.

Hottest
Feb
28°
Coldest
Jun
12°
Wettest
Jan
267 mm
Driest
Aug
37 mm
Rain / yr
1498 mm
154 wet days
Daylight
10.6–13.4 h
shortest–longest
Elevation
762 m
23.3°S
Clearest
Aug
42% cloud

Franco da Rocha weather by month, at a glance

The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.

Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around mid April to late September.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Franco da Rocha, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

Temperatures in Franco da Rocha stay fairly even through the year, without a distinct hot or cool season. The warmest month is February, with an average high of 28°C and low of 19°C; the coolest is June, with an average low of 12°C and high of 22°C.

Days typically run about 10°C warmer than nights year-round.

10°15°20°25°30°35°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2719
Feb2819
Mar2718
Apr2616
May2314
Jun2212
Jul2212
Aug2412
Sep2514
Oct2616
Nov2617
Dec2718

Average hourly temperature in Franco da Rocha

A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on February afternoons, near 28°C, and coldest before dawn in June, near 12°C.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM

Franco da Rocha weather by month

Every month at a glance. Click a month for its detailed page.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 19°26723.213.34.4
Feb28° / 19°1952012.84.5
Mar27° / 18°16118.812.25.2
Apr26° / 16°739.711.56.8
May23° / 14°667.310.97.3
Jun22° / 12°495.310.67.7
Jul22° / 12°494.610.77.8
Aug24° / 12°374.811.28.0
Sep25° / 14°919.111.97.0
Oct26° / 16°13214.412.55.9
Nov26° / 17°16916.313.15.5
Dec27° / 18°21020.613.44.8

Chance of rain

How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.

Franco da Rocha gets about 1498 mm of precipitation a year. On a typical day the chance of rain is often wet, but that rises and falls sharply with the seasons.

The wetter season lasts 5.8 months, from around Oct 8 to Apr 3, peaking in January at about 74% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 3.

January is the wettest month by volume, with 267 mm over about 23 wet days; August is the driest, with 37 mm.

0%10%20%30%40%50%60%70%80%90%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetJan 23 · 74%Jul 3 · 15%
Rain on a day (%)Rain days
Jan7423
Feb7120
Mar6019
Apr3310
May247
Jun175
Jul155
Aug165
Sep309
Oct4614
Nov5516
Dec6721

Monthly rainfall

Over a full year, Franco da Rocha collects about 1498 mm of rain across 154 wet days — roughly 125 mm in an average month.

It doesn’t fall evenly. January is the wettest month with 267 mm, while August is the driest at just 37 mm. The three wettest months alone bring about 45% of the year’s total.

050100150200250300JanFebMarAprMayJunJulAugSepOctNovDec267195161736649493791132169210
Rainfall (mm)Rain days
Jan26723
Feb19520
Mar16119
Apr7310
May667
Jun495
Jul495
Aug375
Sep919
Oct13214
Nov16916
Dec21021

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

How often the daytime sky is clear, partly cloudy or overcast.

In Franco da Rocha, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.

The clearer part of the year begins around March 29 and lasts for 5.9 months, ending around September 23. The clearest month is August, when the sky is clear, mostly clear, or partly cloudy 66% of the time on average.

The cloudier part of the year begins around September 24 and lasts for 6.1 months, ending around March 28. The cloudiest month is January, when it is overcast or mostly cloudy 74% of the time.

0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JanFebMarAprMayJunJulAugSepOctNovDecAug 23 · 68%Jan 10 · 24%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan2674
Feb3466
Mar4357
Apr5644
May5347
Jun6139
Jul6337
Aug6634
Sep5347
Oct3565
Nov3466
Dec3070

Daylight, sunrise and sunset

DaylightNight

Hours of daylight through the year, with sunrise and sunset times.

The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around January 1, brings about 13 h 24 min of light; the shortest, around June 4, only 10 h 36 min — a swing of roughly 2 h 48 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan13.36:377:55
Feb12.86:577:46
Mar12.27:127:22
Apr11.57:236:51
May10.97:376:30
Jun10.67:506:24
Jul10.77:526:33
Aug11.27:356:47
Sep11.97:056:57
Oct12.56:357:08
Nov13.16:187:26
Dec13.46:207:46

Sunny days

How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.

Franco da Rocha averages about 9 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 3 and 17 days.

The sunnier stretch runs 5.6 months, from around Apr 8 to Sep 23. The sunniest month is August, with roughly 16 sunny days (bright).

The greyest month is January, down near 3 sunny days — about 79% fewer than the August peak.

05101520JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightAug 2517 daysJan 123 days
Sunny daysSky
Jan3Gloomy
Feb5Gloomy
Mar7Gloomy
Apr11Mixed
May11Mixed
Jun15Mixed
Jul15Bright
Aug17Bright
Sep12Mixed
Oct7Gloomy
Nov6Gloomy
Dec4Gloomy

Humidity comfort

DryComfortableHumidMuggyOppressiveMiserable

Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.

Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.

In Franco da Rocha, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 6.6 months, from around October 8 to April 25. The muggiest month is February, when the air feels humid, muggy or worse about 98% of the time.

The most comfortable stretch runs from around April 26 to October 7, and July is the most comfortable month — the air is dry or comfortable 98% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 14 · 99%Feb 23 · 2%muggyhumidcomfortabledryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
Jan0322732
Feb0220752
Mar0531640
Apr52442290
May27462520
Jun4943900
Jul6533200
Aug6233600
Sep33422320
Oct112848140
Nov52044300
Dec0833581

Wind

Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.

This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.

Wind in Franco da Rocha is steady company: average speeds sit near 10 km/hcalm — in every month of the year, with no meaningful windy or calm season.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmlight breezeSep 27 · 11 km/hFeb 17 · 9 km/h
Wind speed (km/h)Feels
Jan9calm
Feb9calm
Mar9calm
Apr9calm
May10calm
Jun9calm
Jul10calm
Aug10calm
Sep11calm
Oct11calm
Nov11calm
Dec10calm

Hazard calendar for Franco da Rocha

In seasonPeak

When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.

Franco da Rocha's rainy season runs October–March, when most of the year's rain falls.

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

Best time to visit Franco da Rocha

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Franco da Rocha throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around mid April, Franco da Rocha is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.

Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.

The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Franco da Rocha for general outdoor tourist activities is from mid April to late September, with a peak score in the third week of August.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationAug 17 · 8.1

The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Travel score (0–10)Rating
Jan4.4fair
Feb4.6fair
Mar5.2fair
Apr6.7good
May7.3good
Jun7.7ideal
Jul7.8ideal
Aug8.0ideal
Sep7.0good
Oct5.9good
Nov5.5fair
Dec4.8fair

The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best times of year to visit Franco da Rocha for hot-weather activities run from late March to mid May and again from mid June to mid October, with a peak score in the last week of August.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationAug 26 · 7.0

The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

What to pack for Franco da Rocha, by month

EssentialRecommendedOptional

Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.

Franco da Rocha packs about the same all year — highs hold near 28°C. Across the year the things worth having are light clothes, rain gear and sun protection.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In February, Franco da Rocha sees daytime highs around 28°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

UV index (midday) in Franco da Rocha by month

LowModerateHighVery highExtreme

Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.

Under clear skies, the midday UV index in Franco da Rocha peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 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 15Jul 12UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Average hourly UV index in Franco da Rocha

LowModerateHighVery highExtreme

Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.

The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

UV falls off far faster than brightness as the sun drops, so even in January the burn window is concentrated in the middle of the day: about 9 hours a day reach index 3 (protection recommended), and 7 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM
UV ≥ 3 (h/day)UV ≥ 6 (h/day)
Jan97
Feb8.56.5
Mar86
Apr74.5
May62.5
Jun50
Jul50
Aug6.53.5
Sep74
Oct85.5
Nov8.56.5
Dec97

Air quality in Franco da Rocha by month

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly average.

Air quality in Franco da Rocha is worst in June — around 71 µg/m³ PM2.5 (unhealthy), about 2.3× the cleanest month (December, 31 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyPoorModerateJun 2370 µg/m³Dec 2031 µg/m³
PM2.5 (µg/m³)Level
Jan32Moderate
Feb34Moderate
Mar41Poor
Apr48Poor
May62Unhealthy
Jun71Unhealthy
Jul70Unhealthy
Aug60Unhealthy
Sep53Poor
Oct39Poor
Nov32Moderate
Dec31Moderate
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Franco da Rocha is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecfrost-free year round
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr1000
May1000
Jun1000
Jul1000
Aug1000
Sep1000
Oct1000
Nov1000
Dec1000

Growing degree days

Degree days (base 10°C)Frost-free shaded

Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Franco da Rocha banks about 3,823 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around February.

01,0002,0003,0004,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan407
Feb372
Mar390
Apr333
May261
Jun222
Jul218
Aug251
Sep292
Oct341
Nov345
Dec391

Solar energy

Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.

Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.

Franco da Rocha receives about 4.8 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.5 and 5.8 kWh/m².

The brighter stretch of the year lasts 7.1 months, from around Aug 26 to Mar 28. The brightest month is November, averaging about 5.7 kWh/m² (bright).

The dimmest month is May, down near 3.7 kWh/m² — roughly 34% less than the November peak.

01234567JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseNov 285.8 kWhMay 313.5 kWh
Solar energy (kWh/m²)Level
Jan5.4Bright
Feb5.5Bright
Mar5.0Bright
Apr4.5Bright
May3.7Moderate
Jun3.5Moderate
Jul3.7Moderate
Aug4.5Bright
Sep5.0Bright
Oct5.5Bright
Nov5.7Bright
Dec5.7Bright

Where is Franco da Rocha?

Franco da Rocha sits at 23.3°S, 46.7°W, 762 m above sea level, in Brazil. The nearest listed city is Francisco Morato, 5.0 km away.

Topography around Franco da Rocha

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

Within 3 km, the terrain around Franco da Rocha has only modest variations in elevation — a maximum elevation change of 125 m around an average of 775 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 542 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,708 m.

The land around Franco da Rocha is covered by artificial surfaces (45%) and trees (39%) within 3 km, trees (66%) within 16 km, and trees (54%) and grassland (23%) within 80 km.

3 km
125 m
16 km
542 m
80 km
1,708 m
treesgrasslandcroplandartificial surfacesbare terrainwater
Nearby: Francisco Morato 5.0 km · Caieiras 5.0 km · Perus 10 km · Jaraguá 13 km · Anhanguera 14 km · Campo Limpo Paulista 14 km · Mairiporã 14 km · Brasilandia 15 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 Franco da Rocha (-23.3217°, -46.7269°, elevation 762 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. 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).