Climate and average weather in Pedro do Rosário

In Pedro do Rosário, the weather is muggy, sweltering, wet, and mostly clear and remarkably steady, with daytime highs holding near sweltering levels all year. The wettest stretch peaks around April.

Best: mid June to late September

Over the course of the year, the temperature in Pedro do Rosário typically varies from 23°C to 34°C, and is rarely below 22°C or above 35°C. October is the hottest month of the year, while April is the coldest.

Based on the travel score, the best time of year to visit Pedro do Rosário for warm-weather activities is from mid June to late September.

Hottest
Oct
34°
Coldest
Apr
24°
Wettest
Apr
441 mm
Driest
Sep
17 mm
Rain / yr
2093 mm
205 wet days
Daylight
11.8–12.2 h
shortest–longest
Elevation
28 m
3.0°S
Clearest
Sep
41% cloud

Pedro do Rosário 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 June to late September.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

Temperatures in Pedro do Rosário stay fairly even through the year, without a distinct hot or cool season. The warmest month is October, with an average high of 34°C and low of 24°C; the coolest is April, with an average low of 24°C and high of 30°C.

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

20°25°30°35°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan3224
Feb3124
Mar3024
Apr3024
May3124
Jun3023
Jul3123
Aug3223
Sep3324
Oct3424
Nov3325
Dec3324

How hot and cold Pedro do Rosário really feels

Feels-like highFeels-like lowactual air temp

The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.

On the hottest afternoons, once humidity is folded in, Pedro do Rosário feels like about 38°C (around October 15). Nearly every day a year carries some heat stress, peaking in October.

20°25°30°35°40°JanFebMarAprMayJunJulAugSepOctNovDecdangerous heat
Feels-like high (°C)Air high (°C)Feels-like low (°C)Air low (°C)
Jan36322424
Feb36312424
Mar36302324
Apr36302324
May37312424
Jun35302323
Jul35312323
Aug36322323
Sep37332424
Oct38342424
Nov38332525
Dec37332424

Average hourly temperature in Pedro do Rosário

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 34°C, and coldest before dawn in April, near 24°C.

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

Pedro do Rosário 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
Jan32° / 24°23525.212.22.6
Feb31° / 24°31226.112.12.5
Mar30° / 24°42229.8122.5
Apr30° / 24°44128.411.92.6
May31° / 24°27625.311.93.0
Jun30° / 23°12218.611.83.8
Jul31° / 23°7412.911.84.5
Aug32° / 23°287.311.94.5
Sep33° / 24°174.2124.1
Oct34° / 24°24512.13.6
Nov33° / 25°447.412.13.5
Dec33° / 24°9914.912.23.1

Chance of rain

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

Pedro do Rosário gets about 2093 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 6.2 months, from around Dec 22 to Jun 28, peaking in March at about 98% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Sep 11.

April is the wettest month by volume, with 441 mm over about 28 wet days; September is the driest, with 17 mm.

0%10%20%30%40%50%60%70%80%90%100%110%JanFebMarAprMayJunJulAugSepOctNovDecwetterdriermostly drysome rainoften wetvery wetMar 30 · 98%Sep 11 · 14%
Rain on a day (%)Rain days
Jan8125
Feb9326
Mar9630
Apr9428
May8125
Jun6219
Jul4213
Aug237
Sep154
Oct175
Nov247
Dec4815

Monthly rainfall

Over a full year, Pedro do Rosário collects about 2093 mm of rain across 205 wet days — roughly 174 mm in an average month.

It doesn’t fall evenly. April is the wettest month with 441 mm, while September is the driest at just 17 mm. The three wettest months alone bring about 56% of the year’s total.

050100150200250300350400450500JanFebMarAprMayJunJulAugSepOctNovDec235312422441276122742817244499
Rainfall (mm)Rain days
Jan23525
Feb31226
Mar42230
Apr44128
May27625
Jun12219
Jul7413
Aug287
Sep174
Oct245
Nov447
Dec9915

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Pedro do Rosário, 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 June 1 and lasts for 5.9 months, ending around November 26. The clearest month is August, when the sky is clear, mostly clear, or partly cloudy 89% of the time on average.

The cloudier part of the year begins around November 27 and lasts for 6.1 months, ending around May 31. The cloudiest month is March, when it is overcast or mostly cloudy 92% 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 29 · 89%Mar 30 · 6%mostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan1684
Feb1387
Mar892
Apr1189
May3169
Jun6040
Jul7921
Aug8911
Sep8713
Oct7327
Nov5248
Dec3862

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. Close to the equator, Pedro do Rosário barely changes through the year: days stay near 12 h 12 min of light in every season.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan12.26:066:15
Feb12.16:136:19
Mar12.06:106:12
Apr11.96:046:00
May11.96:025:54
Jun11.86:075:57
Jul11.86:126:02
Aug11.96:086:03
Sep12.05:565:55
Oct12.15:445:48
Nov12.15:435:51
Dec12.25:526:03

Sunny days

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

Pedro do Rosário averages about 7 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 0 and 18 days.

The sunnier stretch runs 5.2 months, from around Jun 9 to Nov 14. The sunniest month is September, with roughly 17 sunny days (bright).

The greyest month is March, down near 1 sunny days — about 97% fewer than the September peak.

05101520JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightSep 618 daysMar 290 days
Sunny daysSky
Jan1Gloomy
Feb1Gloomy
Mar1Gloomy
Apr1Gloomy
May3Gloomy
Jun8Mixed
Jul13Mixed
Aug17Bright
Sep17Bright
Oct13Mixed
Nov8Gloomy
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.

Pedro do Rosário is humid all year round — on a typical day the air feels at least humid, and there is no real dry season to wait for.

The stickiest month is January, when it feels muggy, oppressive or miserable about 100% of the time. Even in January, the mildest month, the air is dry or comfortable only 0% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecmiserableoppressive
Muggy (%)Oppressive (%)Miserable (%)
Jan18910
Feb07426
Mar06040
Apr03961
May03466
Jun06435
Jul38610
Aug4925
Sep4950
Oct6940
Nov3970
Dec1963

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.

Across the year, average wind speed in Pedro do Rosário is typically calm, near 8 km/h, and varies moderately with the seasons.

The windier part of the year lasts 5.2 months, from around Jul 29 to Jan 3. The windiest month is October, averaging about 11 km/h (calm).

The calmer part of the year runs from around Jan 4 to Jul 28, with March the calmest month at about 6 km/h.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmerwindiercalmlight breezeOct 10 · 11 km/hMar 31 · 5 km/h
Wind speed (km/h)Feels
Jan7calm
Feb6calm
Mar6calm
Apr5calm
May6calm
Jun7calm
Jul7calm
Aug9calm
Sep11calm
Oct11calm
Nov10calm
Dec9calm

Hazard calendar for Pedro do Rosário

In seasonPeak

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

Pedro do Rosário's monsoon runs January–May, 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 Pedro do Rosário

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around late September, Pedro do Rosário 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 Pedro do Rosário for general outdoor tourist activities is from mid June to late September, with a peak score in the last week of July.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationJul 31 · 4.8

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
Jan2.6poor
Feb2.5poor
Mar2.5poor
Apr2.6poor
May3.1poor
Jun3.8fair
Jul4.5fair
Aug4.5fair
Sep4.1fair
Oct3.7fair
Nov3.5poor
Dec3.1poor

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 Pedro do Rosário for hot-weather activities is from early July to early December, with a peak score in the first week of September.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationSep 7 · 7.3

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 Pedro do Rosário, 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.

Pedro do Rosário packs about the same all year — highs hold near 34°C. Across the year the things worth having are light clothes, sun protection and rain gear.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In October, Pedro do Rosário sees daytime highs around 34°C and nights near 24°C. Pack light clothes and sun protection. About 5 days see rain.

UV index (midday) in Pedro do Rosário 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 Pedro do Rosário peaks around March 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 15 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 18UV 15Jul 15UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov10Extreme
Dec11Extreme

Average hourly UV index in Pedro do Rosário

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 March the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 6.5 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)
Jan86
Feb8.56.5
Mar8.56.5
Apr86.5
May7.55.5
Jun7.55.5
Jul75
Aug7.55.5
Sep86
Oct86
Nov7.55.5
Dec85.5

Air quality in Pedro do Rosário 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 Pedro do Rosário is worst in November — around 18 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (June, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 1918 µg/m³Jun 199 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb17Moderate
Mar16Moderate
Apr14Moderate
May10Good
Jun9Good
Jul9Good
Aug10Good
Sep9Good
Oct13Moderate
Nov18Moderate
Dec16Moderate
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Pedro do Rosário 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. Pedro do Rosário banks about 6,444 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around November.

02,0004,0006,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan549
Feb481
Mar525
Apr505
May528
Jun504
Jul519
Aug544
Sep555
Oct588
Nov569
Dec578

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.

Pedro do Rosário receives about 5.1 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 4.2 and 6.1 kWh/m².

The brighter stretch of the year lasts 5.4 months, from around Jul 17 to Dec 27. The brightest month is October, averaging about 6.1 kWh/m² (intense).

The dimmest month is April, down near 4.2 kWh/m² — roughly 31% less than the October peak.

01234567JanFebMarAprMayJunJulAugSepOctNovDecdimmerbrighterdimmoderatebrightintenseOct 56.1 kWhApr 24.2 kWh
Solar energy (kWh/m²)Level
Jan4.8Bright
Feb4.6Bright
Mar4.3Bright
Apr4.2Bright
May4.5Bright
Jun4.8Bright
Jul5.1Bright
Aug5.6Bright
Sep6.0Bright
Oct6.1Intense
Nov5.8Bright
Dec5.4Bright

Where is Pedro do Rosário?

Pedro do Rosário sits at 3.0°S, 45.4°W, 28 m above sea level, in Brazil. The nearest listed city is Matinha, 38 km away.

Topography around Pedro do Rosário

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

Within 3 km, the terrain around Pedro do Rosário has only modest variations in elevation — a maximum elevation change of 46 m around an average of 33 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 101 m; within 80 km, only modest variations in elevation — a maximum elevation change of 191 m.

The land around Pedro do Rosário is covered by trees (59%) and grassland (37%) within 3 km, trees (68%) and grassland (31%) within 16 km, and trees (44%) and grassland (44%) within 80 km.

3 km
46 m
16 km
101 m
80 km
191 m
treesgrasslandartificial surfaceswaterwetlandmangroves
Nearby: Matinha 38 km · Penalva 41 km · Presidente Sarney 42 km · Viana 47 km · Zé Doca 48 km · São Vicente Ferrer 53 km · Cajari 54 km · Pinheiro 58 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 Pedro do Rosário (-2.9724°, -45.3513°, elevation 28 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).