Climate and average weather in São José do Vale do Rio Preto

In São José do Vale do Rio Preto, 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 December.

Best: mid April to late September

Over the course of the year, the temperature in São José do Vale do Rio Preto typically varies from 13°C to 28°C, and is rarely below 10°C or above 31°C. February is the hottest month of the year, while July is the coldest.

Based on the travel score, the best time of year to visit São José do Vale do Rio Preto for warm-weather activities is from mid April to late September.

Hottest
Feb
28°
Coldest
Jul
13°
Wettest
Dec
316 mm
Driest
Jun
36 mm
Rain / yr
1805 mm
179 wet days
Daylight
10.6–13.4 h
shortest–longest
Elevation
582 m
22.2°S
Clearest
Jul
49% cloud

São José do Vale do Rio Preto 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 São José do Vale do Rio Preto, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

Temperatures in São José do Vale do Rio Preto 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 July, with an average low of 13°C and high of 22°C.

Days typically run about 8°C warmer than nights year-round.

10°15°20°25°30°35°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2719
Feb2819
Mar2719
Apr2517
May2315
Jun2213
Jul2213
Aug2313
Sep2415
Oct2517
Nov2518
Dec2619

Average hourly temperature in São José do Vale do Rio Preto

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 July, near 13°C.

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

São José do Vale do Rio Preto 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°30321.913.24.5
Feb28° / 19°2041712.85.0
Mar27° / 19°2162112.24.8
Apr25° / 17°10114.411.56.0
May23° / 15°6611.4116.6
Jun22° / 13°366.510.77.3
Jul22° / 13°366.710.87.4
Aug23° / 13°407.211.27.4
Sep24° / 15°9311.711.96.7
Oct25° / 17°14516.312.55.7
Nov25° / 18°25121.313.14.7
Dec26° / 19°31623.713.34.4

Chance of rain

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

São José do Vale do Rio Preto gets about 1805 mm of precipitation a year. On a typical day the chance of rain is very wet, but that rises and falls sharply with the seasons.

The wetter season lasts 6.4 months, from around Sep 30 to Apr 13, peaking in December at about 79% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jun 25.

December is the wettest month by volume, with 316 mm over about 24 wet days; June is the driest, with 36 mm.

0%10%20%30%40%50%60%70%80%90%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetDec 24 · 79%Jun 25 · 19%
Rain on a day (%)Rain days
Jan7022
Feb6117
Mar6721
Apr4914
May3711
Jun227
Jul217
Aug247
Sep3912
Oct5316
Nov7121
Dec7624

Monthly rainfall

Over a full year, São José do Vale do Rio Preto collects about 1805 mm of rain across 179 wet days — roughly 150 mm in an average month.

It doesn’t fall evenly. December is the wettest month with 316 mm, while June is the driest at just 36 mm. The three wettest months alone bring about 48% of the year’s total.

050100150200250300350JanFebMarAprMayJunJulAugSepOctNovDec3032042161016636364093145251316
Rainfall (mm)Rain days
Jan30322
Feb20417
Mar21621
Apr10114
May6611
Jun367
Jul367
Aug407
Sep9312
Oct14516
Nov25121
Dec31624

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In São José do Vale do Rio Preto, 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 April 6 and lasts for 5.5 months, ending around September 19. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 59% of the time on average.

The cloudier part of the year begins around September 20 and lasts for 6.5 months, ending around April 5. The cloudiest month is November, when it is overcast or mostly cloudy 81% 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%JanFebMarAprMayJunJulAugSepOctNovDecJul 26 · 60%Dec 7 · 15%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan2575
Feb3367
Mar3268
Apr4357
May4456
Jun5545
Jul5941
Aug5842
Sep4357
Oct2872
Nov1981
Dec2080

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 December 18, brings about 13 h 24 min of light; the shortest, around June 18, 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)
Jan13.26:247:38
Feb12.86:447:29
Mar12.26:577:06
Apr11.57:076:37
May11.07:206:16
Jun10.77:326:12
Jul10.87:346:20
Aug11.27:196:33
Sep11.96:506:42
Oct12.56:216:52
Nov13.16:057:09
Dec13.36:077:28

Sunny days

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

São José do Vale do Rio Preto averages about 7 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 2 and 14 days.

The sunnier stretch runs 4.2 months, from around May 18 to Sep 22. The sunniest month is July, with roughly 13 sunny days (mixed).

The greyest month is December, down near 3 sunny days — about 80% fewer than the July peak.

05101520JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightJul 2614 daysDec 22 days
Sunny daysSky
Jan4Gloomy
Feb5Gloomy
Mar5Gloomy
Apr6Gloomy
May8Gloomy
Jun12Mixed
Jul13Mixed
Aug13Mixed
Sep9Mixed
Oct5Gloomy
Nov2Gloomy
Dec3Gloomy

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 São José do Vale do Rio Preto, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 6.7 months, from around October 11 to May 1. The muggiest month is January, when the air feels humid, muggy or worse about 100% of the time.

The most comfortable stretch runs from around May 2 to October 10, and July is the most comfortable month — the air is dry or comfortable 94% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 13 · 95%Jan 13 · 0%muggycomfortablehumiddryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
Jan0025714
Feb0127693
Mar0230662
Apr11646360
May13443940
Jun26571700
Jul4054600
Aug40481200
Sep22452840
Oct72746190
Nov21543400
Dec0330652

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 São José do Vale do Rio Preto is steady company: average speeds sit near 6 km/hcalm — in every month of the year, with no meaningful windy or calm season.

0510JanFebMarAprMayJunJulAugSepOctNovDeccalmSep 15 · 7 km/hMar 29 · 5 km/h
Wind speed (km/h)Feels
Jan6calm
Feb5calm
Mar5calm
Apr5calm
May5calm
Jun5calm
Jul6calm
Aug6calm
Sep7calm
Oct6calm
Nov6calm
Dec6calm

Hazard calendar for São José do Vale do Rio Preto

In seasonPeak

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

São José do Vale do Rio Preto'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 São José do Vale do Rio Preto

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in São José do Vale do Rio Preto throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around late September, São José do Vale do Rio Preto is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.

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 São José do Vale do Rio Preto for general outdoor tourist activities is from mid April to late September, with a peak score in the last week of June.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationJun 22 · 7.5

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
Jan4.6fair
Feb4.9fair
Mar4.8fair
Apr6.0good
May6.6good
Jun7.3good
Jul7.4good
Aug7.4good
Sep6.7good
Oct5.7good
Nov4.8fair
Dec4.4fair

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 São José do Vale do Rio Preto for hot-weather activities run from late January to mid March and again from late March to late October, with a peak score in the first week of September.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationSep 1 · 6.1

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 São José do Vale do Rio Preto, 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.

São José do Vale do Rio Preto 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, São José do Vale do Rio Preto sees daytime highs around 28°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 17 days see rain.

UV index (midday) in São José do Vale do Rio Preto 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 São José do Vale do Rio Preto peaks around January 24 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 24UV 15Jul 10UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep8Very high
Oct12Extreme
Nov14Extreme
Dec14Extreme

Average hourly UV index in São José do Vale do Rio Preto

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
Apr74.5
May63
Jun5.51.5
Jul5.51.5
Aug6.54
Sep74
Oct86
Nov8.56.5
Dec97

Air quality in São José do Vale do Rio Preto 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 São José do Vale do Rio Preto is worst in September — around 19 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (March, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1518 µg/m³Mar 1110 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar10Good
Apr12Good
May15Moderate
Jun16Moderate
Jul15Moderate
Aug15Moderate
Sep19Moderate
Oct13Moderate
Nov11Good
Dec10Good
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

São José do Vale do Rio Preto 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. São José do Vale do Rio Preto banks about 3,852 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)
Jan412
Feb378
Mar395
Apr335
May270
Jun235
Jul230
Aug251
Sep282
Oct331
Nov339
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.

São José do Vale do Rio Preto receives about 4.6 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.4 and 5.9 kWh/m².

The brighter stretch of the year lasts 6.0 months, from around Sep 28 to Mar 30. The brightest month is February, averaging about 5.8 kWh/m² (bright).

The dimmest month is May, down near 3.6 kWh/m² — roughly 38% less than the February peak.

01234567JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseFeb 85.9 kWhMay 283.4 kWh
Solar energy (kWh/m²)Level
Jan5.7Bright
Feb5.9Bright
Mar5.0Bright
Apr4.3Bright
May3.6Moderate
Jun3.4Moderate
Jul3.5Moderate
Aug4.2Bright
Sep4.6Bright
Oct5.0Bright
Nov5.0Bright
Dec5.5Bright

Where is São José do Vale do Rio Preto?

São José do Vale do Rio Preto sits at 22.2°S, 42.9°W, 582 m above sea level, in Brazil. The nearest listed city is Sapucaia, 17 km away.

Topography around São José do Vale do Rio Preto

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São José do Vale do Rio Preto.

Within 3 km, the terrain around São José do Vale do Rio Preto has significant variations in elevation — a maximum elevation change of 514 m around an average of 705 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,467 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,224 m.

The land around São José do Vale do Rio Preto is covered by trees (68%) and grassland (28%) within 3 km, trees (62%) and grassland (36%) within 16 km, and trees (51%) and grassland (44%) within 80 km.

3 km
514 m
16 km
1,467 m
80 km
2,224 m
treesgrasslandartificial surfaceswater
Nearby: Sapucaia 17 km · Sumidouro 28 km · Três Rios 30 km · Teresópolis 30 km · São Pedro 30 km · Além Paraíba 37 km · Paraíba do Sul 38 km · Carmo 41 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 São José do Vale do Rio Preto (-22.1521°, -42.9233°, elevation 582 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).