Boma weather in May

In May, Boma sees average daytime highs of 29°C and overnight lows near 23°C, with 63 mm of rain across 11.6 wet days and about 11.7 hours of daylight. It is the 7th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 30°C in the first days to 28°C by the end. The sky is clear or mostly clear about 2% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 11 h 48 min at the start of May to 11 h 42 min by month's end. Set against the rest of the year, May is Boma's 3rd-clearest and 7th-windiest month. For the whole year in context, see Boma's year-round climate.

Daytime high
29°
7th warmest
Overnight low
23°
6th coldest
Rainfall
63 mm
11.6 wet days
Daylight
11 h 42 min
6:12 AM – 5:56 PM
Cloud cover
77%
3rd clearest
Wind
5 km/h
7th windiest
Solar energy
3.61 kWh/m²
Travel score
4.9
out of 10

Boma is city in Democratic Republic of the Congo.

Density
4,569/km²
people per km²
Founded
1550

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 30°C in the first days to 28°C by the end.

A typical May day in Boma reaches about 29°C in the afternoon and slips back to 23°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, May runs about 1°C cooler than April and about 2°C warmer than June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13024
23024
33024
43024
53024
63024
73023
83023
93023
103023
113023
123023
133023
143023
152923
162923
172923
182923
192923
202923
212923
222922
232922
242922
252922
262922
272822
282822
292822
302822
312822

How May really feels in Boma

Once humidity and wind are folded in, May averages 23 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
23
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Boma weather by month

How May compares with the rest of the year at a glance. May is the 7th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°17621.912.33.4
Feb30° / 24°14419.212.23.4
Mar31° / 24°14720.5123.3
Apr31° / 24°18422.211.93.2
May29° / 23°6311.611.74.9
Jun27° / 20°30.411.77.5
Jul26° / 18°20.111.77.7
Aug26° / 19°60.811.87.3
Sep27° / 20°122.6126.8
Oct29° / 22°5210.412.15.0
Nov30° / 23°1552212.33.4
Dec30° / 23°18723.412.33.4

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 83%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11090
21090
31189
41189
51288
61288
71387
81486
91585
101585
111783
121882
131981
141981
152179
162179
172179
182179
192179
202179
212080
222080
231981
241981
251882
261684
271783
281684
291684
301585
311585

Chance of precipitation in May

Any precipitation

Boma gets around 63 mm of rain over 11.6 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 38% and peaks near 72% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
172
270
369
467
564
662
760
857
954
1051
1148
1246
1343
1441
1538
1636
1734
1831
1929
2027
2125
2222
2320
2419
2517
2615
2714
2812
2911
309
318

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the oppressive band about 69% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
105050
205248
305446
405545
505743
615841
716138
816336
926434
1026632
1136829
1237027
1347125
1457223
1567321
1667519
1777617
1887616
1997714
20107713
21117811
22127810
2314779
2415787
2517776
2618775
2721754
2823743
2926713
3029692
3132671

Wind in May

Winds average 5 km/h in May.

Across May, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 48 min at the start of May to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over May. Sunrise moves from 6:11 AM to 6:15 AM, and sunset from 5:59 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:115:59
211.86:115:59
311.86:115:58
411.86:115:58
511.86:115:58
611.86:115:58
711.86:115:57
811.86:115:57
911.86:115:57
1011.86:115:57
1111.86:115:57
1211.76:125:57
1311.76:125:56
1411.76:125:56
1511.76:125:56
1611.76:125:56
1711.76:125:56
1811.76:125:56
1911.76:125:56
2011.76:135:56
2111.76:135:56
2211.76:135:56
2311.76:135:56
2411.76:135:56
2511.76:135:56
2611.76:145:56
2711.76:145:56
2811.76:145:56
2911.76:145:56
3011.76:145:56
3111.76:155:56

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.61 kWh/m².

For context, solar energy here swings from a low near 3.07 kWh/m² to a high of 4.86 kWh/m² in March across the year — May's 3.61 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.9Moderate
43.9Moderate
53.8Moderate
63.8Moderate
73.8Moderate
83.8Moderate
93.8Moderate
103.8Moderate
113.7Moderate
123.7Moderate
133.7Moderate
143.7Moderate
153.7Moderate
163.6Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.5Moderate
213.5Moderate
223.5Moderate
233.5Moderate
243.4Moderate
253.4Moderate
263.4Moderate
273.3Moderate
283.3Moderate
293.3Moderate
303.3Moderate
313.3Moderate
Planning a trip in May

Hazard calendar for Boma

In seasonPeak

None of Boma's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Boma's rainy season runs November–April, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Boma?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.9
Sightseeing
6th-best month of the year
6.3
Beach & pool
6th-best month of the year

May is a reasonable time to visit Boma for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Boma in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Boma sees daytime highs around 29°C and nights near 23°C. Pack light clothes. Worth having: rain gear. About 12 days see rain.

light clothesrain gear

UV index in Boma in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Boma peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 18 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeMar 15UV 15Jul 18UV 6
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar15Extreme
Apr13Extreme
May8Very high
Jun7High
Jul6High
Aug7High
Sep10Very high
Oct13Extreme
Nov11Extreme
Dec11Extreme

Air quality in Boma in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Boma is worst in July — around 30 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (November, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJul 1429 µg/m³Nov 1710 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb14Moderate
Mar12Moderate
Apr14Moderate
May20Moderate
Jun27Moderate
Jul30Moderate
Aug24Moderate
Sep19Moderate
Oct13Moderate
Nov10Good
Dec12Good
Location & terrain

Where is Boma?

Boma sits at 5.9°S, 13.1°E, 11 m above sea level, in Democratic Republic of the Congo. The nearest listed city is Matadi, 45 km away.

Buco Zau

Topography around Boma

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

Within 3 km, the terrain around Boma has only modest variations in elevation — a maximum elevation change of 142 m around an average of 27 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 436 m; within 80 km, significant variations in elevation — a maximum elevation change of 585 m.

The land around Boma is covered by artificial surfaces (33%), grassland (23%) and water (20%) within 3 km, grassland (58%) and trees (22%) within 16 km, and trees (54%) and grassland (37%) within 80 km.

3 km
142 m
16 km
436 m
80 km
585 m
treesshrubsgrasslandartificial surfaceswaterwetlandmangroves
May weather nearby: Matadi 45 km · Kenge 67 km · Moanda 76 km · Soyo 82 km · Tshela 96 km · Cabinda 100 km · Tombôco 110 km · Buco Zau 133 km

Democratic Republic of the Congo travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type C / E
220 V · 50 Hz
Prices
≈ 42% of US
price level, 2025
GDP per capita
$807
2025
Happiness
3.8 / 10
World Happiness, 2025
Safe drinking water
12%
of population, 2024
Road deaths
34.9
per 100k/yr, 2019
Income group
Low
World Bank
English
Very low
EF EPI 400

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 Boma (-5.851°, 13.0536°, elevation 11 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).