Climate and average weather in Monte Alegre

In Monte Alegre, the weather is muggy, sweltering, wet, and partly cloudy and remarkably steady, with daytime highs holding near sweltering levels all year. The wettest stretch peaks around March.

Best: late June to early October

Over the course of the year, the temperature in Monte Alegre typically varies from 24°C to 33°C, and is rarely below 23°C or above 35°C. October is the hottest month of the year, while March is the coldest.

Based on the travel score, the best time of year to visit Monte Alegre for warm-weather activities is from late June to early October.

Hottest
Oct
33°
Coldest
Mar
24°
Wettest
Mar
297 mm
Driest
Sep
32 mm
Rain / yr
1758 mm
214 wet days
Daylight
11.9–12.1 h
shortest–longest
Elevation
57 m
2.0°S
Clearest
Aug
41% cloud

Monte Alegre is settlement in Brazil.

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

Monte Alegre 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 June to early October.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

Temperatures in Monte Alegre stay fairly even through the year, without a distinct hot or cool season. The warmest month is October, with an average high of 33°C and low of 26°C; the coolest is March, with an average low of 24°C and high of 30°C.

Days typically run about 7°C warmer than nights year-round.

20°25°30°35°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan3125
Feb3024
Mar3024
Apr3024
May3024
Jun3124
Jul3124
Aug3225
Sep3326
Oct3326
Nov3326
Dec3225

How hot and cold Monte Alegre 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, Monte Alegre feels like about 39°C (around September 27). Nearly every day a year carries some heat stress, peaking in September.

20°25°30°35°40°JanFebMarAprMayJunJulAugSepOctNovDecdangerous heat
Feels-like high (°C)Air high (°C)Feels-like low (°C)Air low (°C)
Jan36312525
Feb35302424
Mar35302424
Apr36302424
May37302424
Jun36312424
Jul36312424
Aug37322525
Sep38332626
Oct39332626
Nov38332626
Dec37322525

Average hourly temperature in Monte Alegre

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 33°C, and coldest before dawn in March, near 24°C.

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

Monte Alegre 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
Jan31° / 25°22824.112.13.0
Feb30° / 24°22523.612.13.0
Mar30° / 24°29727.2122.9
Apr30° / 24°29227.4122.8
May30° / 24°22327.411.92.9
Jun31° / 24°11921.611.93.4
Jul31° / 24°6714.811.94.2
Aug32° / 25°357.611.94.3
Sep33° / 26°326.4123.8
Oct33° / 26°477.3123.5
Nov33° / 26°7910.712.13.3
Dec32° / 25°11615.612.13.3

Chance of rain

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

Monte Alegre gets about 1758 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 Dec 22 to Jul 5, peaking in April at about 93% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Sep 23.

March is the wettest month by volume, with 297 mm over about 27 wet days; September is the driest, with 32 mm.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecwetterdriermostly drysome rainoften wetvery wetApr 26 · 93%Sep 23 · 20%
Rain on a day (%)Rain days
Jan7724
Feb8424
Mar8827
Apr9127
May8827
Jun7322
Jul4715
Aug258
Sep216
Oct257
Nov3411
Dec5116

Monthly rainfall

Over a full year, Monte Alegre collects about 1758 mm of rain across 214 wet days — roughly 147 mm in an average month.

It doesn’t fall evenly. March is the wettest month with 297 mm, while September is the driest at just 32 mm. The three wettest months alone bring about 46% of the year’s total.

050100150200250300350JanFebMarAprMayJunJulAugSepOctNovDec2282252972922231196735324779116
Rainfall (mm)Rain days
Jan22824
Feb22524
Mar29727
Apr29227
May22327
Jun11922
Jul6715
Aug358
Sep326
Oct477
Nov7911
Dec11616

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Monte Alegre, 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 6 and lasts for 5.2 months, ending around November 10. The clearest month is August, when the sky is clear, mostly clear, or partly cloudy 80% of the time on average.

The cloudier part of the year begins around December 2 and lasts for 6.1 months, ending around June 5. The cloudiest month is April, when it is overcast or mostly cloudy 91% 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 · 81%Apr 2 · 8%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan1981
Feb1387
Mar1189
Apr991
May2278
Jun4951
Jul6832
Aug8020
Sep7327
Oct5545
Nov4060
Dec3367

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, Monte Alegre barely changes through the year: days stay near 12 h 06 min of light in every season.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan12.16:426:49
Feb12.16:496:53
Mar12.06:466:46
Apr12.06:386:35
May11.96:356:30
Jun11.96:406:33
Jul11.96:456:39
Aug11.96:426:38
Sep12.06:316:30
Oct12.06:206:23
Nov12.16:196:24
Dec12.16:296:36

Sunny days

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

Monte Alegre 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 4.8 months, from around Jun 15 to Nov 7. The sunniest month is August, with roughly 18 sunny days (bright).

The greyest month is March, down near 0 sunny days — about 98% fewer than the August peak.

0510152025JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightbrilliantAug 2318 daysMar 150 days
Sunny daysSky
Jan2Gloomy
Feb1Gloomy
Mar0Gloomy
Apr0Gloomy
May2Gloomy
Jun7Gloomy
Jul12Mixed
Aug18Bright
Sep16Bright
Oct11Mixed
Nov7Gloomy
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.

Monte Alegre 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 (%)
Jan07525
Feb07030
Mar05842
Apr03664
May02674
Jun04357
Jul06436
Aug07327
Sep27919
Oct38215
Nov27920
Dec08119

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 Monte Alegre is typically calm, near 9 km/h, and varies little with the seasons.

The windier part of the year lasts 5.1 months, from around Aug 2 to Jan 4. The windiest month is September, averaging about 11 km/h (calm).

The calmer part of the year runs from around Feb 10 to Aug 1, with May the calmest month at about 8 km/h.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmerwindiercalmlight breezeSep 19 · 11 km/hMay 5 · 8 km/h
Wind speed (km/h)Feels
Jan9calm
Feb9calm
Mar8calm
Apr8calm
May8calm
Jun8calm
Jul8calm
Aug10calm
Sep11calm
Oct10calm
Nov10calm
Dec10calm

Hazard calendar for Monte Alegre

In seasonPeak

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

Monte Alegre's rainy season runs January–May, 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 Monte Alegre

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around late September, Monte Alegre 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 Monte Alegre for general outdoor tourist activities is from late June to early October, with a peak score in the last week of July.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationJul 28 · 4.4

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
Jan3.0poor
Feb3.0poor
Mar2.9poor
Apr2.8poor
May2.9poor
Jun3.4poor
Jul4.2fair
Aug4.3fair
Sep3.8fair
Oct3.5poor
Nov3.3poor
Dec3.3poor

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 Monte Alegre for hot-weather activities is from mid July to mid December, with a peak score in the last week of August.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationAug 26 · 7.1

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 Monte Alegre, 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.

Monte Alegre packs about the same all year — highs hold near 33°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, Monte Alegre sees daytime highs around 33°C and nights near 26°C. Pack light clothes and sun protection. About 7 days see rain.

UV index (midday) in Monte Alegre 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 Monte Alegre peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 13UV 15Jun 23UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Average hourly UV index in Monte Alegre

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)
Jan86.5
Feb86.5
Mar8.56.5
Apr86.5
May7.55.5
Jun7.55
Jul7.55
Aug7.55
Sep86
Oct7.55.5
Nov7.55.5
Dec85.5

Air quality in Monte Alegre 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 Monte Alegre is worst in November — around 32 µg/m³ PM2.5 (moderate), about 3.6× the cleanest month (June, 9 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 1631 µg/m³Jun 229 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb16Moderate
Mar16Moderate
Apr14Moderate
May10Good
Jun9Good
Jul9Good
Aug11Good
Sep14Moderate
Oct23Moderate
Nov32Moderate
Dec23Moderate
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Monte Alegre 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. Monte Alegre banks about 6,607 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around October.

02,0004,0006,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan550
Feb483
Mar534
Apr515
May535
Jun520
Jul543
Aug573
Sep580
Oct608
Nov582
Dec583

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.

Monte Alegre receives about 5.1 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 4.0 and 6.5 kWh/m².

The brighter stretch of the year lasts 5.1 months, from around Jul 22 to Dec 23. The brightest month is September, averaging about 6.3 kWh/m² (intense).

The dimmest month is May, down near 4.2 kWh/m² — roughly 34% less than the September peak.

012345678JanFebMarAprMayJunJulAugSepOctNovDecdimmerbrighterdimmoderatebrightintenseSep 306.5 kWhMay 14.0 kWh
Solar energy (kWh/m²)Level
Jan4.7Bright
Feb4.5Bright
Mar4.4Bright
Apr4.1Bright
May4.1Bright
Jun4.5Bright
Jul5.0Bright
Aug5.7Bright
Sep6.3Intense
Oct6.4Intense
Nov6.0Bright
Dec5.4Bright

Where is Monte Alegre?

Monte Alegre sits at 2.0°S, 54.1°W, 57 m above sea level, in Brazil. The nearest listed city is Prainha, 70 km away.

Topography around Monte Alegre

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Monte Alegre.

Within 3 km, the terrain around Monte Alegre has only modest variations in elevation — a maximum elevation change of 143 m around an average of 54 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 423 m; within 80 km, large variations in elevation — a maximum elevation change of 744 m.

The land around Monte Alegre is covered by grassland (51%) within 3 km, grassland (32%), trees (31%) and water (27%) within 16 km, and trees (53%) and grassland (25%) within 80 km.

3 km
143 m
16 km
423 m
80 km
744 m
treesgrasslandartificial surfaceswaterwetland
Nearby: Prainha 70 km · Alenquer 73 km · Santarém 85 km · Mojuí dos Campos 98 km · Belterra 119 km · Óbidos 160 km · Almeirim 175 km · Uruará 195 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 Monte Alegre (-2.0008°, -54.081°, elevation 57 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).