Climate and average weather in Bumpe

In Bumpe, the summers are muggy, sweltering, fairly dry, and mostly clear and the winters are warm and mostly cloudy.

Best: late November to late January

Over the course of the year, the temperature in Bumpe typically varies from 22°C to 34°C, and is rarely below 20°C or above 37°C. February is the hottest month of the year, while August is the coldest.

Based on the travel score, the best time of year to visit Bumpe for warm-weather activities is from late November to late January.

Hottest
Feb
34°
Coldest
Aug
22°
Wettest
Aug
522 mm
Driest
Jan
19 mm
Rain / yr
2640 mm
242 wet days
Daylight
11.5–12.5 h
shortest–longest
Elevation
38 m
7.9°N
Clearest
Jan
41% cloud

Bumpe is place in Southern Province, Sierra Leone.

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

Bumpe 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 November to late January.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

Temperatures in Bumpe stay fairly even through the year, without a distinct hot or cool season. The warmest month is February, with an average high of 34°C and low of 23°C; the coolest is August, with an average low of 22°C and high of 28°C.

Days typically run about 8°C warmer than nights, with the widest day–night swing (around 11°C) in February.

15°20°25°30°35°40°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan3322
Feb3423
Mar3424
Apr3224
May3123
Jun2923
Jul2822
Aug2822
Sep2822
Oct2922
Nov3022
Dec3122

How hot and cold Bumpe 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, Bumpe feels like about 39°C (around March 13). About 275 days a year carry some heat stress, peaking in March.

20°25°30°35°40°JanFebMarAprMayJunJulAugSepOctNovDecdangerous heat
Feels-like high (°C)Air high (°C)Feels-like low (°C)Air low (°C)
Jan36332222
Feb38342323
Mar39342424
Apr38322424
May36312323
Jun33292323
Jul31282222
Aug30282222
Sep32282222
Oct33292222
Nov34302222
Dec35312222

Average hourly temperature in Bumpe

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 34°C, and coldest before dawn in August, near 22°C.

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

Bumpe 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
Jan33° / 22°194.311.64.4
Feb34° / 23°224.711.73.5
Mar34° / 24°6011.911.93.0
Apr32° / 24°12618.512.22.9
May31° / 23°25627.512.42.7
Jun29° / 23°35429.112.52.8
Jul28° / 22°42929.412.43.2
Aug28° / 22°52229.512.33.3
Sep28° / 22°45929.5123.0
Oct29° / 22°25729.711.82.9
Nov30° / 22°10720.211.63.8
Dec31° / 22°307.411.54.9

Chance of rain

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

Bumpe gets about 2640 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 6.8 months, from around Apr 23 to Nov 15, peaking in September at about 99% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jan 5.

August is the wettest month by volume, with 522 mm over about 30 wet days; January is the driest, with 19 mm.

0%10%20%30%40%50%60%70%80%90%100%110%JanFebMarAprMayJunJulAugSepOctNovDecdrierwetterdriermostly drysome rainoften wetvery wetSep 20 · 99%Jan 5 · 12%
Rain on a day (%)Rain days
Jan144
Feb185
Mar3812
Apr6219
May8928
Jun9729
Jul9529
Aug9530
Sep9830
Oct9530
Nov6720
Dec257

Monthly rainfall

Over a full year, Bumpe collects about 2640 mm of rain across 242 wet days — roughly 220 mm in an average month.

It doesn’t fall evenly. August is the wettest month with 522 mm, while January is the driest at just 19 mm. The three wettest months alone bring about 53% of the year’s total.

050100150200250300350400450500550600JanFebMarAprMayJunJulAugSepOctNovDec19226012625635442952245925710730
Rainfall (mm)Rain days
Jan194
Feb225
Mar6012
Apr12619
May25628
Jun35429
Jul42929
Aug52230
Sep45930
Oct25730
Nov10720
Dec307

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Bumpe, 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 November 11 and lasts for 4.9 months, ending around April 9. The clearest month is January, when the sky is clear, mostly clear, or partly cloudy 72% of the time on average.

The cloudier part of the year begins around April 10 and lasts for 7.1 months, ending around November 10. The cloudiest month is August, when it is overcast or mostly cloudy 99% 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%JanFebMarAprMayJunJulAugSepOctNovDecFeb 2 · 76%Aug 24 · 1%clearmostly clearpartly cloudymostly cloudyovercastclearercloudierclearer
Clearer (%)Cloudier (%)
Jan7228
Feb7030
Mar4852
Apr2476
May892
Jun694
Jul397
Aug199
Sep496
Oct1387
Nov3466
Dec6436

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 June 12, brings about 12 h 30 min of light; the shortest, around January 1, only 11 h 30 min — a swing of roughly 1 hour.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan11.67:096:45
Feb11.77:106:54
Mar11.96:596:56
Apr12.26:436:53
May12.46:336:55
Jun12.56:347:02
Jul12.46:417:06
Aug12.36:447:00
Sep12.06:416:43
Oct11.86:386:27
Nov11.66:446:22
Dec11.56:576:30

Sunny days

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

Bumpe averages about 5 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 0 and 17 days.

The sunnier stretch runs 4.0 months, from around Nov 24 to Mar 25. The sunniest month is January, with roughly 16 sunny days (bright).

The greyest month is May, down near 0 sunny days — about 99% fewer than the January peak.

05101520JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyersunniergloomymixedbrightJan 117 daysMay 240 days
Sunny daysSky
Jan17Bright
Feb13Mixed
Mar8Gloomy
Apr2Gloomy
May0Gloomy
Jun0Gloomy
Jul0Gloomy
Aug0Gloomy
Sep0Gloomy
Oct1Gloomy
Nov4Gloomy
Dec13Mixed

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.

Bumpe 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 February, when it feels muggy, oppressive or miserable about 96% of the time. Even in January, the mildest month, the air is dry or comfortable only 2% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecmiserableoppressivemuggy
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
Jan11437561
Feb00435574
Mar001186318
Apr00065143
May00005644
Jun0000928
Jul0003970
Aug0003970
Sep0000991
Oct0000937
Nov00008812
Dec0019836

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 Bumpe is steady company: average speeds sit near 5 km/hcalm — in every month of the year, with no meaningful windy or calm season.

0510JanFebMarAprMayJunJulAugSepOctNovDeccalmAug 10 · 6 km/hNov 9 · 4 km/h
Wind speed (km/h)Feels
Jan5calm
Feb6calm
Mar6calm
Apr5calm
May4calm
Jun5calm
Jul6calm
Aug6calm
Sep5calm
Oct4calm
Nov4calm
Dec4calm

Hazard calendar for Bumpe

In seasonPeak

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

Bumpe's monsoon runs May–October, when most of the year's rain falls.

Bumpe sees seasonal dust haze (February–April), heaviest in February.

Monsoon
Dust
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Best time to visit Bumpe

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around mid January, Bumpe 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 Bumpe for general outdoor tourist activities is from late November to late January, with a peak score in the last week of December.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timetravel scoretemperaturecloudsprecipitationDec 22 · 5.1

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
Jan4.4fair
Feb3.5poor
Mar3.0poor
Apr2.9poor
May2.7poor
Jun2.8poor
Jul3.2poor
Aug3.3poor
Sep3.0poor
Oct2.9poor
Nov3.8fair
Dec4.9fair

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 Bumpe for hot-weather activities is from late November to early March, with a peak score in the last week of December.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationDec 31 · 7.7

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 Bumpe, 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.

For a warm-season trip around February (highs near 34°C), the essentials are light clothes and sun protection. In the cold season around August (highs near 28°C), pack light clothes and rain gear.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In February, Bumpe sees daytime highs around 34°C and nights near 23°C. Pack light clothes. Worth having: sun protection. About 5 days see rain.

UV index (midday) in Bumpe 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 Bumpe peaks around August 21 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 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 highAug 21UV 13Dec 15UV 8
UV index (midday)Level
Jan10Very high
Feb12Extreme
Mar12Extreme
Apr10Extreme
May12Extreme
Jun11Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov9Very high
Dec8Very high

Average hourly UV index in Bumpe

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 August the burn window is concentrated in the middle of the day: about 8 hours a day reach index 3 (protection recommended), and 6 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)
Jan75
Feb7.55.5
Mar86
Apr7.55.5
May86
Jun86
Jul85.5
Aug86
Sep86
Oct7.55.5
Nov74.5
Dec74

Air quality in Bumpe 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 Bumpe is worst in April — around 202 µg/m³ PM2.5 (very unhealthy), about 19.4× the cleanest month (August, 10 µg/m³).

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

0306090120150180210JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyVery unhealthyModerateGoodModeratePoorApr 9200 µg/m³Aug 2011 µg/m³
PM2.5 (µg/m³)Level
Jan70Unhealthy
Feb77Unhealthy
Mar194Very unhealthy
Apr202Very unhealthy
May33Moderate
Jun19Moderate
Jul13Moderate
Aug10Good
Sep11Good
Oct17Moderate
Nov25Moderate
Dec50Poor
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Bumpe 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. Bumpe banks about 6,037 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around March.

02,0004,0006,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan532
Feb514
Mar579
Apr541
May527
Jun478
Jul469
Aug462
Sep460
Oct490
Nov481
Dec505

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.

Bumpe receives about 4.5 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.2 and 5.6 kWh/m².

The brighter stretch of the year lasts 5.3 months, from around Nov 28 to May 6. The brightest month is February, averaging about 5.6 kWh/m² (bright).

The dimmest month is August, down near 3.3 kWh/m² — roughly 41% less than the February peak.

01234567JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseFeb 285.6 kWhAug 93.2 kWh
Solar energy (kWh/m²)Level
Jan5.3Bright
Feb5.6Bright
Mar5.5Bright
Apr5.0Bright
May4.3Bright
Jun3.9Moderate
Jul3.5Moderate
Aug3.3Moderate
Sep3.8Moderate
Oct4.3Bright
Nov4.4Bright
Dec4.8Bright

Where is Bumpe?

Bumpe sits at 7.9°N, 11.9°W, 38 m above sea level, in Sierra Leone. The nearest listed city is Bo, 20 km away.

BoNjalaMile 91KenemaSegbwemaMakeniLunsarKoidu

Topography around Bumpe

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

Within 3 km, the terrain around Bumpe has only modest variations in elevation — a maximum elevation change of 49 m around an average of 39 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 132 m; within 80 km, large variations in elevation — a maximum elevation change of 820 m.

The land around Bumpe is covered by trees (46%) and shrubs (36%) within 3 km, trees (41%), shrubs (38%) and grassland (21%) within 16 km, and trees (57%) and shrubs (20%) within 80 km.

3 km
49 m
16 km
132 m
80 km
820 m
treesshrubsgrasslandartificial surfaceswaterwetlandmangroves
Nearby: Bo 20 km · Njala 40 km · Mile 91 72 km · Kenema 79 km · Segbwema 106 km · Makeni 112 km · Lunsar 112 km · Koidu 132 km

Sierra Leone travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type D / G
230 V · 50 Hz
Prices
≈ 24% of US
price level, 2025
GDP per capita
$846
2025
Happiness
3.3 / 10
World Happiness, 2025
Safe drinking water
11%
of population, 2024
Homicide rate
2.2
per 100k, 2020
Road deaths
33
per 100k/yr, 2019
Income group
Low
World Bank
Religion
Muslim 77%Christian 23%

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 Bumpe (7.8921°, -11.9054°, elevation 38 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).