Climate and average weather in Karusi

In Karusi, the weather is warm, wet, and partly cloudy and remarkably steady, with daytime highs holding near warm levels all year. The wettest stretch peaks around November.

Best: mid May to late September

Over the course of the year, the temperature in Karusi typically varies from 15°C to 27°C, and is rarely below 13°C or above 29°C. September is the hottest month of the year, while April is the coldest.

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

Hottest
Sep
27°
Coldest
Apr
16°
Wettest
Nov
247 mm
Driest
Jul
3 mm
Rain / yr
1625 mm
192 wet days
Daylight
11.8–12.2 h
shortest–longest
Elevation
1,627 m
3.1°S
Clearest
Jul
62% cloud

Karusi is human settlement.

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

Karusi 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 May to late September.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

Temperatures in Karusi stay fairly even through the year, without a distinct hot or cool season. The warmest month is September, with an average high of 27°C and low of 17°C; the coolest is April, with an average low of 16°C and high of 24°C.

Days typically run about 10°C warmer than nights year-round.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2516
Feb2616
Mar2516
Apr2416
May2516
Jun2515
Jul2615
Aug2716
Sep2717
Oct2616
Nov2516
Dec2515

Average hourly temperature in Karusi

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 September afternoons, near 27°C, and coldest before dawn in April, near 16°C.

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

Karusi 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
Jan25° / 16°20123.312.24.6
Feb26° / 16°17821.412.14.5
Mar25° / 16°21726.3124.2
Apr24° / 16°21025.311.94.2
May25° / 16°8813.211.96.3
Jun25° / 15°9211.87.8
Jul26° / 15°30.711.88.0
Aug27° / 16°172.511.97.4
Sep27° / 17°527.2126.6
Oct26° / 16°16117.912.15.3
Nov25° / 16°24725.812.14.1
Dec25° / 15°24225.912.24.3

Chance of rain

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

Karusi gets about 1625 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 7.0 months, from around Oct 12 to May 11, peaking in November at about 89% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 9.

November is the wettest month by volume, with 247 mm over about 26 wet days; July is the driest, with 3 mm.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetNov 27 · 89%Jul 9 · 2%
Rain on a day (%)Rain days
Jan7623
Feb7621
Mar8526
Apr8425
May4213
Jun72
Jul31
Aug93
Sep257
Oct5718
Nov8526
Dec8326

Monthly rainfall

Over a full year, Karusi collects about 1625 mm of rain across 192 wet days — roughly 135 mm in an average month.

It doesn’t fall evenly. November is the wettest month with 247 mm, while July is the driest at just 3 mm. The three wettest months alone bring about 43% of the year’s total.

050100150200250300JanFebMarAprMayJunJulAugSepOctNovDec20117821721088931752161247242
Rainfall (mm)Rain days
Jan20123
Feb17821
Mar21726
Apr21025
May8813
Jun92
Jul31
Aug173
Sep527
Oct16118
Nov24726
Dec24226

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Karusi, 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 May 8 and lasts for 5.0 months, ending around October 7. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 40% of the time on average.

The cloudier part of the year begins around October 8 and lasts for 7.0 months, ending around May 7. The cloudiest month is November, 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%JanFebMarAprMayJunJulAugSepOctNovDecJul 11 · 44%Nov 17 · 7%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan1882
Feb2179
Mar1981
Apr1288
May3169
Jun3664
Jul4060
Aug3466
Sep3169
Oct1981
Nov892
Dec1486

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, Karusi 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)
Jan12.26:046:13
Feb12.16:116:17
Mar12.06:086:10
Apr11.96:025:58
May11.96:005:51
Jun11.86:055:54
Jul11.86:106:00
Aug11.96:076:00
Sep12.05:545:53
Oct12.15:425:46
Nov12.15:405:49
Dec12.25:506:01

Sunny days

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

Karusi averages about 2 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 0 and 6 days.

The sunnier stretch runs 4.7 months, from around May 17 to Oct 6. The sunniest month is July, with roughly 5 sunny days (gloomy).

The greyest month is November, down near 1 sunny days — about 89% fewer than the July peak.

0510JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedJul 106 daysNov 120 days
Sunny daysSky
Jan1Gloomy
Feb2Gloomy
Mar2Gloomy
Apr1Gloomy
May3Gloomy
Jun4Gloomy
Jul5Gloomy
Aug5Gloomy
Sep3Gloomy
Oct2Gloomy
Nov1Gloomy
Dec1Gloomy

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

The more humid part of the year lasts 6.7 months, from around October 21 to May 13. The muggiest month is March, when the air feels humid, muggy or worse about 82% of the time.

The most comfortable stretch runs from around May 14 to October 20, and July is the most comfortable month — the air is dry or comfortable 100% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 14 · 100%Mar 30 · 12%humiddrycomfortablehumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)
Jan127721
Feb227701
Mar017811
Apr016831
May1345420
Jun702550
Jul95500
Aug831430
Sep5235130
Oct1642420
Nov120790
Dec022780

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 Karusi is typically calm, near 6 km/h, and varies little with the seasons.

The windier part of the year lasts 5.4 months, from around May 5 to Oct 14. The windiest month is July, averaging about 8 km/h (calm).

The calmer part of the year runs from around Oct 15 to May 4, with December the calmest month at about 4 km/h.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmerwindiercalmercalmlight breezeJul 12 · 8 km/hDec 7 · 4 km/h
Wind speed (km/h)Feels
Jan5calm
Feb5calm
Mar5calm
Apr5calm
May7calm
Jun8calm
Jul8calm
Aug8calm
Sep7calm
Oct6calm
Nov5calm
Dec4calm

Hazard calendar for Karusi

In seasonPeak

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

Karusi's rainy season runs October–April, 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 Karusi

TravelBeach/poolTemperatureCloudsPrecipitation

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

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

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationJul 8 · 8.1

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
Feb4.5fair
Mar4.2fair
Apr4.2fair
May6.2good
Jun7.8ideal
Jul7.9ideal
Aug7.4good
Sep6.6good
Oct5.3fair
Nov4.1fair
Dec4.3fair

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 Karusi for hot-weather activities is from late May to early October, with a peak score in the third week of July.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationJul 15 · 7.6

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 Karusi, 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.

Karusi packs about the same all year — highs hold near 27°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 September, Karusi sees daytime highs around 27°C and nights near 17°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

UV index (midday) in Karusi 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 Karusi peaks around March 17 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 17UV 16Jun 19UV 10
UV index (midday)Level
Jan11Extreme
Feb15Extreme
Mar16Extreme
Apr15Extreme
May12Extreme
Jun10Extreme
Jul11Extreme
Aug11Extreme
Sep14Extreme
Oct14Extreme
Nov13Extreme
Dec12Extreme

Average hourly UV index in Karusi

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 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)
Jan7.55.5
Feb8.57
Mar8.57
Apr8.57
May86
Jun7.55.5
Jul7.55.5
Aug7.55.5
Sep86
Oct8.56.5
Nov86.5
Dec86

Air quality in Karusi 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 Karusi is worst in August — around 68 µg/m³ PM2.5 (unhealthy), and holds fairly steady the rest of the year.

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyUnhealthyAug 1968 µg/m³Apr 1551 µg/m³
PM2.5 (µg/m³)Level
Jan60Unhealthy
Feb59Unhealthy
Mar55Poor
Apr51Poor
May55Unhealthy
Jun65Unhealthy
Jul64Unhealthy
Aug68Unhealthy
Sep66Unhealthy
Oct57Unhealthy
Nov55Poor
Dec57Unhealthy
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Karusi 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. Karusi banks about 3,845 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around September.

01,0002,0003,0004,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan321
Feb297
Mar323
Apr300
May309
Jun301
Jul324
Aug358
Sep358
Oct344
Nov302
Dec310

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.

Karusi receives about 5.5 kWh/m² a day of solar energy — bright — and it stays remarkably steady, holding between 4.9 and 6.0 kWh/m² all year. For solar panels, output here is a flat line, not a seasonal wave.

01234567JanFebMarAprMayJunJulAugSepOctNovDecdimmoderatebrightintenseFeb 236.0 kWhApr 294.9 kWh
Solar energy (kWh/m²)Level
Jan5.7Bright
Feb6.0Bright
Mar5.8Bright
Apr5.0Bright
May5.0Bright
Jun5.1Bright
Jul5.4Bright
Aug5.5Bright
Sep5.9Bright
Oct5.6Bright
Nov5.2Bright
Dec5.4Bright

Where is Karusi?

Karusi sits at 3.1°S, 30.2°E, 1,627 m above sea level, in Burundi. The nearest listed city is Zanandore, 18 km away.

ZanandoreNgoziGitegaBugaramaCendajuruKirundoKabangaKayanza

Topography around Karusi

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

Within 3 km, the terrain around Karusi has only modest variations in elevation — a maximum elevation change of 181 m around an average of 1,552 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 525 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,689 m.

The land around Karusi is covered by cropland (30%), trees (29%) and grassland (26%) within 3 km, cropland (36%), grassland (29%) and trees (23%) within 16 km, and grassland (34%) and cropland (34%) within 80 km.

3 km
181 m
16 km
525 m
80 km
1,689 m
treesshrubsgrasslandcroplandartificial surfaceswater
Nearby: Zanandore 18 km · Ngozi 43 km · Gitega 45 km · Bugarama 48 km · Cendajuru 53 km · Kirundo 58 km · Kabanga 62 km · Kayanza 63 km

Burundi travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type C / E
220 V · 50 Hz
Prices
≈ 34% of US
price level, 2025
GDP per capita
$234
2025
Happiness
3.8 / 10
World Happiness, 2020
Homicide rate
5.6
per 100k, 2016
Road deaths
35.5
per 100k/yr, 2019
Income group
Low
World Bank
Religion
Christian 94%Muslim 3%other 1%none 1%

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 Karusi (-3.1014°, 30.1628°, elevation 1,627 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).