Climate and average weather in Boriziny

In Boriziny, the weather is humid, sweltering, wet, and mostly clear and remarkably steady, with daytime highs holding near sweltering levels all year. The wettest stretch peaks around January.

Best: late May to early September

Over the course of the year, the temperature in Boriziny typically varies from 20°C to 35°C, and is rarely below 18°C or above 38°C. November is the hottest month of the year, while July is the coldest.

Based on the travel score, the best time of year to visit Boriziny for warm-weather activities is from late May to early September.

Hottest
Nov
35°
Coldest
Jul
20°
Wettest
Jan
472 mm
Driest
Jul
1 mm
Rain / yr
1464 mm
119 wet days
Daylight
11.1–12.9 h
shortest–longest
Elevation
22 m
15.6°S
Clearest
Sep
21% cloud

Boriziny 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 May to early September.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

Temperatures in Boriziny stay fairly even through the year, without a distinct hot or cool season. The warmest month is November, with an average high of 35°C and low of 24°C; the coolest is July, with an average low of 20°C and high of 31°C.

Days typically run about 10°C warmer than nights, with the widest day–night swing (around 12°C) in September.

15°20°25°30°35°40°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan3224
Feb3224
Mar3324
Apr3424
May3322
Jun3121
Jul3120
Aug3220
Sep3321
Oct3523
Nov3524
Dec3424

How hot and cold Boriziny 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, Boriziny feels like about 38°C (around March 16). About 281 days a year carry some heat stress, peaking in March.

15°20°25°30°35°40°JanFebMarAprMayJunJulAugSepOctNovDecdangerous heat
Feels-like high (°C)Air high (°C)Feels-like low (°C)Air low (°C)
Jan37322424
Feb37322424
Mar38332424
Apr37342424
May34332222
Jun31312121
Jul31312020
Aug32322020
Sep33332121
Oct35352323
Nov37352424
Dec38342424

Average hourly temperature in Boriziny

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 November afternoons, near 35°C, and coldest before dawn in July, near 20°C.

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

Boriziny 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°4722712.82.4
Feb32° / 24°34424.212.52.5
Mar33° / 24°21719.112.12.8
Apr34° / 24°366.511.73.6
May33° / 22°91.611.34.6
Jun31° / 21°20.411.15.7
Jul31° / 20°10.311.26.1
Aug32° / 20°20.311.55.6
Sep33° / 21°20.611.94.6
Oct35° / 23°214.312.43.2
Nov35° / 24°10212.112.72.4
Dec34° / 24°25622.412.92.3

Chance of rain

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

Boriziny gets about 1464 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 4.8 months, from around Nov 11 to Apr 6, peaking in January at about 90% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 3.

January is the wettest month by volume, with 472 mm over about 27 wet days; July is the driest, with 1 mm.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetJan 28 · 90%Jul 3 · 0%
Rain on a day (%)Rain days
Jan8627
Feb8624
Mar6219
Apr227
May52
Jun10
Jul10
Aug10
Sep21
Oct144
Nov4012
Dec7322

Monthly rainfall

Over a full year, Boriziny collects about 1464 mm of rain across 119 wet days — roughly 122 mm in an average month.

It doesn’t fall evenly. January is the wettest month with 472 mm, while July is the driest at just 1 mm. The three wettest months alone bring about 73% of the year’s total.

050100150200250300350400450500550JanFebMarAprMayJunJulAugSepOctNovDec472344217369212221102256
Rainfall (mm)Rain days
Jan47227
Feb34424
Mar21719
Apr367
May92
Jun20
Jul10
Aug20
Sep21
Oct214
Nov10212
Dec25622

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Boriziny, 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 4 and lasts for 7.5 months, ending around November 17. The clearest month is September, when the sky is clear, mostly clear, or partly cloudy 94% of the time on average.

The cloudier part of the year begins around November 18 and lasts for 4.5 months, ending around April 3. The cloudiest month is January, 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%JanFebMarAprMayJunJulAugSepOctNovDecSep 29 · 95%Jan 10 · 18%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan1981
Feb2377
Mar4555
Apr7822
May8911
Jun8911
Jul9010
Aug946
Sep946
Oct9010
Nov7129
Dec4258

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 12 h 54 min of light; the shortest, around June 1, only 11 h 06 min — a swing of roughly 1 h 48 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan12.85:346:24
Feb12.55:486:19
Mar12.15:566:02
Apr11.76:005:39
May11.36:075:24
Jun11.16:175:22
Jul11.26:205:30
Aug11.56:095:38
Sep11.95:465:41
Oct12.45:245:45
Nov12.75:125:57
Dec12.95:186:13

Sunny days

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

Boriziny averages about 16 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 2 and 25 days.

The sunnier stretch runs 7.2 months, from around Apr 8 to Nov 13. The sunniest month is September, with roughly 25 sunny days (brilliant).

The greyest month is January, down near 3 sunny days — about 89% fewer than the September peak.

051015202530JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightbrilliantSep 2325 daysJan 292 days
Sunny daysSky
Jan3Gloomy
Feb3Gloomy
Mar8Gloomy
Apr18Bright
May23Bright
Jun23Brilliant
Jul24Brilliant
Aug25Brilliant
Sep24Brilliant
Oct23Bright
Nov15Bright
Dec7Gloomy

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 Boriziny, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 7.3 months, from around October 25 to June 4. 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 June 5 to October 24, and August is the most comfortable month — the air is dry or comfortable 85% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecAug 22 · 87%Jan 1 · 0%miserablecomfortablehumidmuggyoppressivedryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
Jan00086527
Feb00036234
Mar000195625
Apr011050354
May08453880
Jun34545700
Jul126818100
Aug147114100
Sep96521500
Oct338351770
Nov0112828301
Dec016225714

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 Boriziny is typically light breeze, near 12 km/h, and varies a lot with the seasons.

The windier part of the year lasts 6.3 months, from around Apr 25 to Nov 3. The windiest month is August, averaging about 17 km/h (light breeze).

The calmer part of the year runs from around Nov 4 to Apr 24, with January the calmest month at about 7 km/h.

0510152025JanFebMarAprMayJunJulAugSepOctNovDeccalmerwindiercalmercalmlight breezebreezyAug 25 · 17 km/hJan 31 · 7 km/h
Wind speed (km/h)Feels
Jan7calm
Feb7calm
Mar9calm
Apr11calm
May13light breeze
Jun16light breeze
Jul17light breeze
Aug17light breeze
Sep17light breeze
Oct14light breeze
Nov11calm
Dec8calm

Hazard calendar for Boriziny

In seasonPeak

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

Boriziny's monsoon runs December–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 Boriziny

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around late August, Boriziny 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 Boriziny for general outdoor tourist activities is from late May to early September, with a peak score in the second week of July.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationJul 10 · 6.2

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
Jan2.4poor
Feb2.5poor
Mar2.8poor
Apr3.6fair
May4.6fair
Jun5.7good
Jul6.1good
Aug5.6good
Sep4.5fair
Oct3.2poor
Nov2.4poor
Dec2.3poor

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 Boriziny for hot-weather activities is from late April to mid October, with a peak score in the first week of July.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationJul 6 · 8.8

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 Boriziny, 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.

Boriziny packs about the same all year — highs hold near 35°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 November, Boriziny sees daytime highs around 35°C and nights near 24°C. Pack light clothes and sun protection. Worth having: rain gear. About 12 days see rain.

UV index (midday) in Boriziny 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 Boriziny peaks around February 10 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 10UV 15Jun 19UV 8
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov12Extreme
Dec14Extreme

Average hourly UV index in Boriziny

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
Mar86.5
Apr7.55.5
May74.5
Jun63.5
Jul6.54
Aug75
Sep86
Oct86.5
Nov8.56.5
Dec97

Air quality in Boriziny 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 Boriziny is worst in November — around 21 µg/m³ PM2.5 (moderate), about 5.3× the cleanest month (July, 4 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateNov 1620 µg/m³Jul 154 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb6Good
Mar6Good
Apr5Good
May5Good
Jun4Good
Jul4Good
Aug5Good
Sep6Good
Oct12Good
Nov21Moderate
Dec12Good
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Boriziny 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. Boriziny banks about 6,427 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)
Jan557
Feb501
Mar572
Apr559
May546
Jun477
Jul472
Aug488
Sep509
Oct578
Nov584
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.

Boriziny receives about 5.8 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 4.7 and 7.2 kWh/m².

The brighter stretch of the year lasts 4.2 months, from around Aug 25 to Dec 29. The brightest month is November, averaging about 7.1 kWh/m² (intense).

The dimmest month is June, down near 4.7 kWh/m² — roughly 33% less than the November peak.

012345678JanFebMarAprMayJunJulAugSepOctNovDecdimmerbrighterdimmoderatebrightintenseNov 17.2 kWhJun 194.7 kWh
Solar energy (kWh/m²)Level
Jan5.4Bright
Feb5.3Bright
Mar5.8Bright
Apr5.8Bright
May5.2Bright
Jun4.7Bright
Jul4.8Bright
Aug5.5Bright
Sep6.5Intense
Oct7.1Intense
Nov7.0Intense
Dec6.4Intense

Where is Boriziny?

Boriziny sits at 15.6°S, 47.7°E, 22 m above sea level, in Madagascar. The nearest listed city is Mampikony, 60 km away.

BefandrianaMarovoayTsaratananaAmbato BoenyMahajangaMaromandia

Topography around Boriziny

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

Within 3 km, the terrain around Boriziny has only modest variations in elevation — a maximum elevation change of 69 m around an average of 22 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 306 m; within 80 km, large variations in elevation — a maximum elevation change of 1,122 m.

The land around Boriziny is covered by cropland (49%) and grassland (33%) within 3 km, grassland (53%) and trees (24%) within 16 km, and grassland (61%) and trees (25%) within 80 km.

3 km
69 m
16 km
306 m
80 km
1,122 m
treesshrubsgrasslandcroplandwatermangroves
Nearby: Mampikony 60 km · Antsohihy 82 km · Befandriana 99 km · Marovoay 126 km · Tsaratanana 139 km · Ambato Boeny 144 km · Mahajanga 146 km · Maromandia 155 km

Madagascar travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
220 V · 50 Hz
Prices
≈ 31% of US
price level, 2025
GDP per capita
$599
2025
Happiness
4.2 / 10
World Happiness, 2025
Safe drinking water
22%
of population, 2024
Road deaths
29.2
per 100k/yr, 2019
Income group
Low
World Bank
English
Low
EF EPI 457
Religion
Church of Jesus Christ in Madagascar/Malagasy Lutheran Church/Anglican Church 34%Roman Catholic 32%none 22%other Christian 8%

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 Boriziny (-15.55°, 47.6667°, elevation 22 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).