Climate and average weather in São José dos Campos

In São José dos Campos, the weather is humid, hot, wet, and partly cloudy and remarkably steady, with daytime highs holding near hot levels all year. The wettest stretch peaks around January.

Best: mid April to late September

Over the course of the year, the temperature in São José dos Campos typically varies from 12°C to 28°C, and is rarely below 9°C or above 32°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 dos Campos for warm-weather activities is from mid April to late September.

Hottest
Feb
28°
Coldest
Jul
12°
Wettest
Jan
226 mm
Driest
Aug
35 mm
Rain / yr
1266 mm
151 wet days
Daylight
10.6–13.4 h
shortest–longest
Elevation
600 m
23.2°S
Clearest
Aug
44% cloud

São José dos Campos is human settlement in Brazil.

Air quality
Good
PM10 30 µg/m³ · 2014

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

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

Temperatures in São José dos Campos 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 20°C; the coolest is July, with an average low of 12°C and high of 23°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)
Jan2820
Feb2820
Mar2819
Apr2617
May2415
Jun2313
Jul2312
Aug2413
Sep2515
Oct2617
Nov2718
Dec2819

Average hourly temperature in São José dos Campos

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 12°C.

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

São José dos Campos 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
Jan28° / 20°22622.113.34.4
Feb28° / 20°17118.512.84.3
Mar28° / 19°13918.112.25.2
Apr26° / 17°579.511.56.7
May24° / 15°577.610.97.3
Jun23° / 13°385.110.67.8
Jul23° / 12°445.110.77.8
Aug24° / 13°355.211.27.9
Sep25° / 15°769.911.96.8
Oct26° / 17°10913.612.55.9
Nov27° / 18°14216.613.15.4
Dec28° / 19°17220.113.44.8

Chance of rain

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

São José dos Campos gets about 1266 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 4, peaking in January at about 71% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jun 24.

January is the wettest month by volume, with 226 mm over about 22 wet days; August is the driest, with 35 mm.

0%10%20%30%40%50%60%70%80%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetJan 11 · 71%Jun 24 · 15%
Rain on a day (%)Rain days
Jan7022
Feb6619
Mar5718
Apr3210
May258
Jun175
Jul175
Aug185
Sep3210
Oct4514
Nov5517
Dec6520

Monthly rainfall

Over a full year, São José dos Campos collects about 1266 mm of rain across 151 wet days — roughly 106 mm in an average month.

It doesn’t fall evenly. January is the wettest month with 226 mm, while August is the driest at just 35 mm. The three wettest months alone bring about 45% of the year’s total.

050100150200250JanFebMarAprMayJunJulAugSepOctNovDec226171139575738443576109142172
Rainfall (mm)Rain days
Jan22622
Feb17119
Mar13918
Apr5710
May578
Jun385
Jul445
Aug355
Sep7610
Oct10914
Nov14217
Dec17220

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In São José dos Campos, 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 31 and lasts for 5.7 months, ending around September 20. The clearest month is August, when the sky is clear, mostly clear, or partly cloudy 63% of the time on average.

The cloudier part of the year begins around September 21 and lasts for 6.3 months, ending around March 30. The cloudiest month is January, when it is overcast or mostly cloudy 75% 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 24 · 65%Jan 6 · 24%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan2575
Feb3367
Mar4060
Apr5446
May5248
Jun6040
Jul6139
Aug6337
Sep4951
Oct3466
Nov3268
Dec2872

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 5, 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)
Jan13.36:347:51
Feb12.86:547:42
Mar12.27:087:18
Apr11.57:206:48
May10.97:336:26
Jun10.67:466:21
Jul10.77:486:30
Aug11.27:326:43
Sep11.97:026:54
Oct12.56:327:05
Nov13.16:157:23
Dec13.46:177:42

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 dos Campos averages about 9 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 4 and 17 days.

The sunnier stretch runs 5.5 months, from around Apr 10 to Sep 22. The sunniest month is August, with roughly 16 sunny days (bright).

The greyest month is January, down near 4 sunny days — about 76% fewer than the August peak.

05101520JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightAug 2317 daysJan 94 days
Sunny daysSky
Jan4Gloomy
Feb5Gloomy
Mar7Gloomy
Apr10Mixed
May11Mixed
Jun14Mixed
Jul15Mixed
Aug16Bright
Sep11Mixed
Oct6Gloomy
Nov6Gloomy
Dec5Gloomy

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 dos Campos, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 6.8 months, from around October 4 to April 28. The muggiest month is February, when the air feels humid, muggy or worse about 99% of the time.

The most comfortable stretch runs from around April 29 to October 3, 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 14 · 97%Feb 27 · 1%comfortablemuggyhumiddryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
Jan0116766
Feb0115786
Mar0223713
Apr21941380
May18463230
Jun36511300
Jul5343400
Aug44451000
Sep20443230
Oct72348220
Nov21642390
Dec0529642

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 dos Campos is steady company: average speeds sit near 7 km/hcalm — in every month of the year, with no meaningful windy or calm season.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmlight breezeSep 23 · 8 km/hFeb 19 · 6 km/h
Wind speed (km/h)Feels
Jan7calm
Feb6calm
Mar6calm
Apr7calm
May7calm
Jun7calm
Jul7calm
Aug8calm
Sep8calm
Oct8calm
Nov8calm
Dec7calm

Hazard calendar for São José dos Campos

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 dos Campos'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 dos Campos

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around mid April, São José dos Campos 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 São José dos Campos 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 16 · 8.0

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
Feb4.3fair
Mar5.2fair
Apr6.7good
May7.3good
Jun7.8ideal
Jul7.8ideal
Aug7.9ideal
Sep6.8good
Oct5.9good
Nov5.4fair
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 time of year to visit São José dos Campos for hot-weather activities is from late March to late October, with a peak score in the last week of August.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest 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 São José dos Campos, 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 dos Campos 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 dos Campos sees daytime highs around 28°C and nights near 20°C. Pack light clothes and rain gear. Worth having: sun protection. About 19 days see rain.

UV index (midday) in São José dos Campos 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 dos Campos peaks around February 8 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 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 highExtremeFeb 8UV 15Jul 11UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Average hourly UV index in São José dos Campos

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 February the burn window is concentrated in the middle of the day: about 8.5 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
Jun5.50
Jul50
Aug6.53.5
Sep74
Oct86
Nov8.56.5
Dec97

Air quality in São José dos Campos 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 dos Campos is worst in June — around 32 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 16 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 2132 µg/m³Nov 2316 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb17Moderate
Mar19Moderate
Apr21Moderate
May27Moderate
Jun32Moderate
Jul31Moderate
Aug28Moderate
Sep28Moderate
Oct20Moderate
Nov16Moderate
Dec16Moderate
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

São José dos Campos 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 dos Campos banks about 4,019 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)
Jan426
Feb390
Mar408
Apr351
May281
Jun239
Jul233
Aug264
Sep304
Oct354
Nov361
Dec409

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 dos Campos receives about 4.6 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.4 and 5.5 kWh/m².

The brighter stretch of the year lasts 7.0 months, from around Aug 26 to Mar 26. The brightest month is November, averaging about 5.4 kWh/m² (bright).

The dimmest month is May, down near 3.6 kWh/m² — roughly 33% less than the November peak.

01234567JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseNov 305.5 kWhMay 303.4 kWh
Solar energy (kWh/m²)Level
Jan5.3Bright
Feb5.4Bright
Mar4.8Bright
Apr4.3Bright
May3.6Moderate
Jun3.4Moderate
Jul3.6Moderate
Aug4.4Bright
Sep4.7Bright
Oct5.2Bright
Nov5.4Bright
Dec5.5Bright

Where is São José dos Campos?

São José dos Campos sits at 23.2°S, 45.9°W, 600 m above sea level, in Brazil. The nearest listed city is Jacareí, 16 km away.

Topography around São José dos Campos

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São José dos Campos.

Within 3 km, the terrain around São José dos Campos has only modest variations in elevation — a maximum elevation change of 70 m around an average of 571 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 446 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,040 m.

The land around São José dos Campos is covered by artificial surfaces (42%), trees (27%) and grassland (24%) within 3 km, grassland (46%) and trees (33%) within 16 km, and trees (54%) and grassland (32%) within 80 km.

3 km
70 m
16 km
446 m
80 km
2,040 m
treesgrasslandcroplandartificial surfaceswater
Nearby: Jacareí 16 km · Caçapava 20 km · Guararema 30 km · Paraibuna 32 km · Santa Isabel 37 km · Taubaté 38 km · Salesópolis 39 km · Tremembé 42 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 dos Campos (-23.1794°, -45.8869°, elevation 600 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).