Climate and average weather in Santa Rosa de Viterbo

In Santa Rosa de Viterbo, the weather is hot, wet, and partly cloudy and remarkably steady, with daytime highs holding near hot levels all year. The wettest stretch peaks around January.

Best: late April to late August

Over the course of the year, the temperature in Santa Rosa de Viterbo typically varies from 13°C to 30°C, and is rarely below 9°C or above 35°C. October is the hottest month of the year, while June is the coldest.

Based on the travel score, the best time of year to visit Santa Rosa de Viterbo for warm-weather activities is from late April to late August.

Hottest
Oct
30°
Coldest
Jun
14°
Wettest
Jan
239 mm
Driest
Aug
19 mm
Rain / yr
1251 mm
140 wet days
Daylight
10.7–13.3 h
shortest–longest
Elevation
677 m
21.5°S
Clearest
Aug
30% cloud

Santa Rosa de Viterbo is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Santa Rosa de Viterbo 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 late April to late August.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

Temperatures in Santa Rosa de Viterbo stay fairly even through the year, without a distinct hot or cool season. The warmest month is October, with an average high of 30°C and low of 19°C; the coolest is June, with an average low of 14°C and high of 26°C.

Days typically run about 11°C warmer than nights, with the widest day–night swing (around 13°C) in August.

10°20°30°40°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2921
Feb3020
Mar2920
Apr2918
May2615
Jun2614
Jul2613
Aug2815
Sep3017
Oct3019
Nov3020
Dec2920

Average hourly temperature in Santa Rosa de Viterbo

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 October afternoons, near 30°C, and coldest before dawn in June, near 14°C.

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

Santa Rosa de Viterbo 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
Jan29° / 21°23922.313.23.7
Feb30° / 20°16718.112.73.9
Mar29° / 20°14417.212.24.5
Apr29° / 18°598.311.56.1
May26° / 15°446.1117.5
Jun26° / 14°263.210.78.1
Jul26° / 13°212.410.88.3
Aug28° / 15°192.911.37.6
Sep30° / 17°677.311.95.7
Oct30° / 19°10413.112.54.6
Nov30° / 20°15917134.3
Dec29° / 20°20321.713.33.8

Chance of rain

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

Santa Rosa de Viterbo gets about 1251 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 11 to Apr 5, peaking in December at about 72% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jun 30.

January is the wettest month by volume, with 239 mm over about 22 wet days; August is the driest, with 19 mm.

0%10%20%30%40%50%60%70%80%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetDec 26 · 72%Jun 30 · 8%
Rain on a day (%)Rain days
Jan7122
Feb6518
Mar5517
Apr298
May206
Jun113
Jul82
Aug103
Sep247
Oct4313
Nov5717
Dec6922

Monthly rainfall

Over a full year, Santa Rosa de Viterbo collects about 1251 mm of rain across 140 wet days — roughly 104 mm in an average month.

It doesn’t fall evenly. January is the wettest month with 239 mm, while August is the driest at just 19 mm. The three wettest months alone bring about 49% of the year’s total.

050100150200250300JanFebMarAprMayJunJulAugSepOctNovDec239167144594426211967104159203
Rainfall (mm)Rain days
Jan23922
Feb16718
Mar14417
Apr598
May446
Jun263
Jul212
Aug193
Sep677
Oct10413
Nov15917
Dec20322

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Santa Rosa de Viterbo, 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 28 and lasts for 6.1 months, ending around September 29. The clearest month is August, when the sky is clear, mostly clear, or partly cloudy 79% of the time on average.

The cloudier part of the year begins around September 30 and lasts for 5.9 months, ending around March 27. The cloudiest month is January, when it is overcast or mostly cloudy 73% 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 22 · 80%Jan 8 · 25%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan2773
Feb3862
Mar5050
Apr6436
May6337
Jun7129
Jul7624
Aug7921
Sep6634
Oct4654
Nov3961
Dec3268

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 18 min of light; the shortest, around June 6, only 10 h 42 min — a swing of roughly 2 h 36 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan13.26:437:54
Feb12.77:027:46
Mar12.27:157:24
Apr11.57:246:55
May11.07:366:35
Jun10.77:496:31
Jul10.87:516:39
Aug11.37:366:51
Sep11.97:077:00
Oct12.56:397:10
Nov13.06:237:26
Dec13.36:277:45

Sunny days

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

Santa Rosa de Viterbo averages about 12 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 4 and 21 days.

The sunnier stretch runs 6.0 months, from around Apr 5 to Oct 5. The sunniest month is August, with roughly 20 sunny days (bright).

The greyest month is January, down near 4 sunny days — about 79% fewer than the August peak.

0510152025JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightbrilliantAug 2021 daysJan 44 days
Sunny daysSky
Jan4Gloomy
Feb6Gloomy
Mar9Mixed
Apr14Mixed
May15Mixed
Jun17Bright
Jul19Bright
Aug21Bright
Sep16Bright
Oct10Mixed
Nov7Gloomy
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 Santa Rosa de Viterbo, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 6.5 months, from around October 10 to April 25. The muggiest month is January, when the air feels humid, muggy or worse about 99% of the time.

The most comfortable stretch runs from around April 26 to October 9, and July is the most comfortable month — the air is dry or comfortable 96% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 21 · 96%Jan 1 · 0%oppressivecomfortablemuggyhumiddryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
Jan01137214
Feb02147410
Mar0221707
Apr42039361
May24403240
Jun42441300
Jul6432400
Aug7121800
Sep41292460
Oct132138270
Nov31332512
Dec0219718

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 Santa Rosa de Viterbo is steady company: average speeds sit near 8 km/hcalm — in every month of the year, with no meaningful windy or calm season.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmlight breezeSep 15 · 9 km/hFeb 27 · 7 km/h
Wind speed (km/h)Feels
Jan7calm
Feb7calm
Mar7calm
Apr7calm
May7calm
Jun8calm
Jul8calm
Aug9calm
Sep9calm
Oct9calm
Nov8calm
Dec7calm

Hazard calendar for Santa Rosa de Viterbo

In seasonPeak

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

Santa Rosa de Viterbo's monsoon runs November–March, when most of the year's rain falls.

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

Best time to visit Santa Rosa de Viterbo

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Santa Rosa de Viterbo throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around early May, Santa Rosa de Viterbo 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 Santa Rosa de Viterbo for general outdoor tourist activities is from late April to late August, with a peak score in the first week of July.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationJul 4 · 8.3

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
Jan3.7fair
Feb3.9fair
Mar4.5fair
Apr6.1good
May7.4good
Jun8.1ideal
Jul8.3ideal
Aug7.5ideal
Sep5.7good
Oct4.6fair
Nov4.3fair
Dec3.8fair

The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Santa Rosa de Viterbo for hot-weather activities is from early April to early October, with a peak score in the last week of August.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationAug 23 · 8.5

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 Santa Rosa de Viterbo, 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.

Santa Rosa de Viterbo packs about the same all year — highs hold near 30°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 October, Santa Rosa de Viterbo sees daytime highs around 30°C and nights near 19°C. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

UV index (midday) in Santa Rosa de Viterbo 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 Santa Rosa de Viterbo peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 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 21UV 15Jul 10UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7Very high
Jun6High
Jul6High
Aug8Very high
Sep9Very high
Oct11Extreme
Nov14Extreme
Dec14Extreme

Average hourly UV index in Santa Rosa de Viterbo

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
Feb8.57
Mar86
Apr75
May63
Jun5.52
Jul5.52
Aug6.54
Sep74.5
Oct86
Nov8.56.5
Dec97

Air quality in Santa Rosa de Viterbo 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 Santa Rosa de Viterbo is worst in September — around 32 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (November, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1430 µg/m³Nov 2310 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb12Good
Mar12Good
Apr13Moderate
May15Moderate
Jun15Moderate
Jul16Moderate
Aug23Moderate
Sep32Moderate
Oct16Moderate
Nov10Good
Dec10Good
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Santa Rosa de Viterbo 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. Santa Rosa de Viterbo banks about 4,762 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around February.

02,0004,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan464
Feb421
Mar452
Apr398
May330
Jun291
Jul301
Aug353
Sep403
Oct452
Nov436
Dec460

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.

Santa Rosa de Viterbo receives about 5.2 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.9 and 6.0 kWh/m².

The brighter stretch of the year lasts 7.0 months, from around Aug 22 to Mar 22. The brightest month is October, averaging about 6.0 kWh/m² (bright).

The dimmest month is June, down near 3.9 kWh/m² — roughly 34% less than the October peak.

01234567JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseOct 196.0 kWhJun 43.9 kWh
Solar energy (kWh/m²)Level
Jan5.6Bright
Feb5.8Bright
Mar5.3Bright
Apr4.9Bright
May4.2Bright
Jun3.9Moderate
Jul4.2Bright
Aug5.0Bright
Sep5.7Bright
Oct6.0Bright
Nov5.9Bright
Dec5.8Bright

Where is Santa Rosa de Viterbo?

Santa Rosa de Viterbo sits at 21.5°S, 47.4°W, 677 m above sea level, in Brazil. The nearest listed city is Cajuru, 23 km away.

Topography around Santa Rosa de Viterbo

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santa Rosa de Viterbo.

Within 3 km, the terrain around Santa Rosa de Viterbo has only modest variations in elevation — a maximum elevation change of 229 m around an average of 688 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 379 m; within 80 km, large variations in elevation — a maximum elevation change of 1,085 m.

The land around Santa Rosa de Viterbo is covered by trees (35%) and cropland (33%) within 3 km, cropland (41%) and trees (40%) within 16 km, and cropland (45%) and trees (36%) within 80 km.

3 km
229 m
16 km
379 m
80 km
1,085 m
treesgrasslandcroplandartificial surfaceswater
Nearby: Cajuru 23 km · Tambaú 27 km · Santa Rita do Passa Quatro 29 km · Mococa 37 km · Serrana 38 km · Cravinhos 41 km · Santa Cruz das Palmeiras 41 km · Casa Branca 44 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 Santa Rosa de Viterbo (-21.4728°, -47.3631°, elevation 677 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).