Isiro weather in May

In May, Isiro sees average daytime highs of 28°C and overnight lows near 21°C, with 152 mm of rain across 24.4 wet days and about 12.1 hours of daylight. It is the 6th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 6% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of May to 12 h 06 min by month's end. Set against the rest of the year, May is Isiro's 4th-clearest and 7th-windiest month. For the whole year in context, see Isiro's year-round climate.

Daytime high: 28°; 6th warmest
Overnight low: 21°; 10th coldest
Rainfall: 152 mm; 24.4 wet days
Daylight: 12 h 06 min; 6:02 AM – 6:10 PM
Cloud cover: 77%; 4th clearest
Wind: 4 km/h; 7th windiest
Solar energy: 4.96 kWh/m²
Travel score: 4.1; out of 10

Isiro is city in the Democratic Republic of Congo, capital of the Haut-Uele province.

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

← April Isiro year-round climate June →Best places to visit in May

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical May day in Isiro reaches about 28°C in the afternoon and slips back to 21°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 30°C. Set against its neighbours, May runs on par with April and on par with June.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28
Avg low (°C)	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	20	20	20	20	20	20

	Avg high (°C)	Avg low (°C)
1	28	21
2	28	21
3	28	21
4	28	21
5	28	21
6	28	21
7	28	21
8	28	21
9	28	21
10	28	21
11	28	21
12	28	21
13	28	21
14	28	21
15	28	21
16	28	21
17	28	21
18	28	21
19	28	21
20	28	21
21	28	21
22	28	21
23	28	21
24	28	21
25	28	21
26	28	20
27	28	20
28	28	20
29	28	20
30	28	20
31	28	20

How May really feels in Isiro

Once humidity and wind are folded in, May averages 0 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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Isiro weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 6th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	31° / 20°	37	6.6	11.9	4.7
Feb	32° / 20°	60	9.7	11.9	4.0
Mar	30° / 21°	146	20.3	12	3.7
Apr	28° / 21°	188	23.9	12.1	3.8
May	28° / 21°	152	24.4	12.1	4.1
Jun	27° / 20°	134	24	12.2	4.1
Jul	27° / 20°	149	25.2	12.1	4.2
Aug	27° / 20°	178	26.3	12.1	4.0
Sep	27° / 20°	190	26.5	12	3.8
Oct	27° / 20°	229	28.3	11.9	3.6
Nov	27° / 20°	201	24	11.9	4.1
Dec	29° / 20°	58	10.1	11.8	5.3

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 79%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	19	19	19	20	19	20	20	20	20	20	20	20	21	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	21	21
Cloudier (%)	81	81	81	80	81	80	80	80	80	80	80	80	79	78	78	78	78	78	78	78	78	78	78	78	78	78	78	78	78	79	79

	Clearer (%)	Cloudier (%)
1	19	81
2	19	81
3	19	81
4	20	80
5	19	81
6	20	80
7	20	80
8	20	80
9	20	80
10	20	80
11	20	80
12	20	80
13	21	79
14	22	78
15	22	78
16	22	78
17	22	78
18	22	78
19	22	78
20	22	78
21	22	78
22	22	78
23	22	78
24	22	78
25	22	78
26	22	78
27	22	78
28	22	78
29	22	78
30	21	79
31	21	79

Chance of precipitation in May

Any precipitation

Isiro gets around 152 mm of rain over 24.4 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 79% and peaks near 81% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	77	77	77	77	77	77	78	78	78	78	78	78	78	78	78	78	78	78	78	78	79	79	79	79	80	80	80	81	81	81	81

	Rain chance (%)
1	77
2	77
3	77
4	77
5	77
6	77
7	78
8	78
9	78
10	78
11	78
12	78
13	78
14	78
15	78
16	78
17	78
18	78
19	78
20	78
21	79
22	79
23	79
24	79
25	80
26	80
27	80
28	81
29	81
30	81
31	81

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 72% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Muggy (%)	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	25	26	26	27	28	29	30	31	32	33	35	36	38	39	41
Oppressive (%)	76	76	76	76	76	76	76	76	76	76	76	76	76	76	76	76	75	74	74	73	72	71	70	69	68	67	65	64	62	61	59

	Muggy (%)	Oppressive (%)
1	24	76
2	24	76
3	24	76
4	24	76
5	24	76
6	24	76
7	24	76
8	24	76
9	24	76
10	24	76
11	24	76
12	24	76
13	24	76
14	24	76
15	24	76
16	24	76
17	25	75
18	26	74
19	26	74
20	27	73
21	28	72
22	29	71
23	30	70
24	31	69
25	32	68
26	33	67
27	35	65
28	36	64
29	38	62
30	39	61
31	41	59

Wind in May

Winds average 4 km/h in May.

Across May, daily wind ranges from about 4 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	5	5	5	5	5	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	5	calm
2	5	calm
3	5	calm
4	5	calm
5	5	calm
6	4	calm
7	4	calm
8	4	calm
9	4	calm
10	4	calm
11	4	calm
12	4	calm
13	4	calm
14	4	calm
15	4	calm
16	4	calm
17	4	calm
18	4	calm
19	4	calm
20	4	calm
21	4	calm
22	4	calm
23	4	calm
24	4	calm
25	4	calm
26	4	calm
27	4	calm
28	4	calm
29	4	calm
30	4	calm
31	4	calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 06 min at the start of May to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over May. Sunrise moves from 6:04 AM to 6:03 AM, and sunset from 6:10 PM to 6:11 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1
Sunrise (AM)	6:04	6:04	6:03	6:03	6:03	6:03	6:03	6:03	6:03	6:02	6:02	6:02	6:02	6:02	6:02	6:02	6:02	6:02	6:02	6:02	6:02	6:02	6:02	6:02	6:02	6:02	6:02	6:02	6:02	6:02	6:03
Sunset (PM)	6:10	6:10	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:10	6:10	6:10	6:10	6:10	6:10	6:10	6:10	6:10	6:10	6:11	6:11	6:11	6:11	6:11	6:11

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.1	6:04	6:10
2	12.1	6:04	6:10
3	12.1	6:03	6:09
4	12.1	6:03	6:09
5	12.1	6:03	6:09
6	12.1	6:03	6:09
7	12.1	6:03	6:09
8	12.1	6:03	6:09
9	12.1	6:03	6:09
10	12.1	6:02	6:09
11	12.1	6:02	6:09
12	12.1	6:02	6:09
13	12.1	6:02	6:09
14	12.1	6:02	6:09
15	12.1	6:02	6:09
16	12.1	6:02	6:10
17	12.1	6:02	6:10
18	12.1	6:02	6:10
19	12.1	6:02	6:10
20	12.1	6:02	6:10
21	12.1	6:02	6:10
22	12.1	6:02	6:10
23	12.1	6:02	6:10
24	12.1	6:02	6:10
25	12.1	6:02	6:10
26	12.1	6:02	6:11
27	12.1	6:02	6:11
28	12.1	6:02	6:11
29	12.1	6:02	6:11
30	12.1	6:02	6:11
31	12.1	6:03	6:11

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.96 kWh/m².

For context, solar energy here swings from a low near 4.62 kWh/m² to a high of 5.75 kWh/m² in February across the year — May's 4.96 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	4.9	4.9	4.9	4.9	4.9	4.9	4.8	4.8	4.8	4.8
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.0	Bright
2	5.0	Bright
3	5.0	Bright
4	5.0	Bright
5	5.0	Bright
6	5.0	Bright
7	5.0	Bright
8	5.0	Bright
9	5.0	Bright
10	5.0	Bright
11	5.0	Bright
12	5.0	Bright
13	5.0	Bright
14	5.0	Bright
15	5.0	Bright
16	5.0	Bright
17	5.0	Bright
18	5.0	Bright
19	5.0	Bright
20	5.0	Bright
21	5.0	Bright
22	4.9	Bright
23	4.9	Bright
24	4.9	Bright
25	4.9	Bright
26	4.9	Bright
27	4.9	Bright
28	4.8	Bright
29	4.8	Bright
30	4.8	Bright
31	4.8	Bright

Planning a trip in May

Is May a good time to visit Isiro?

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

4.1

Sightseeing

4th-best month of the year

4.4

Beach & pool

6th-best month of the year

May is a reasonable time to visit Isiro for sightseeing.

What to pack for Isiro in May

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

In May, Isiro sees daytime highs around 28°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 24 days see rain.

light clothesrain gearsun protection

UV index in Isiro in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Isiro peaks around March 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 9 (very high).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	10	11	14	13	11	10	9	12	12	13	10	10
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Very high

	UV index (midday)	Level
Jan	10	Extreme
Feb	11	Extreme
Mar	14	Extreme
Apr	13	Extreme
May	11	Extreme
Jun	10	Very high
Jul	9	Very high
Aug	12	Extreme
Sep	12	Extreme
Oct	13	Extreme
Nov	10	Extreme
Dec	10	Very high

Air quality in Isiro 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 Isiro is worst in February — around 130 µg/m³ PM2.5 (unhealthy), about 14.4× the cleanest month (October, 9 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	61	130	49	18	10	15	16	12	9	9	15	36
Level	Unhealthy	Unhealthy	Poor	Moderate	Good	Moderate	Moderate	Moderate	Good	Good	Moderate	Poor

	PM2.5 (µg/m³)	Level
Jan	61	Unhealthy
Feb	130	Unhealthy
Mar	49	Poor
Apr	18	Moderate
May	10	Good
Jun	15	Moderate
Jul	16	Moderate
Aug	12	Moderate
Sep	9	Good
Oct	9	Good
Nov	15	Moderate
Dec	36	Poor

Location & terrain

Where is Isiro?

Isiro sits at 2.8°N, 27.6°E, 761 m above sea level, in Democratic Republic of the Congo. The nearest listed city is Wamba, 81 km away.

Topography around Isiro

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

Within 3 km, the terrain around Isiro has only modest variations in elevation — a maximum elevation change of 60 m around an average of 748 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 286 m; within 80 km, significant variations in elevation — a maximum elevation change of 469 m.

The land around Isiro is covered by artificial surfaces (36%), grassland (32%) and trees (31%) within 3 km, trees (86%) within 16 km, and trees (91%) within 80 km.

3 km

60 m

artificial surfaces 36%

16 km

286 m

trees 86%

80 km

469 m

trees 91%

treesgrasslandartificial surfaces

← April Isiro year-round climate June →Best places to visit in May

May weather nearby: Wamba 81 km · Bakwa 152 km · Watsa 215 km · Yambio 218 km · Mangbwalu 285 km · Babamba 288 km · Mangina 306 km · Hyosha 313 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 Isiro (2.7739°, 27.616°, elevation 761 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).

	Avg high (°C)	Avg low (°C)
1	28	21
2	28	21
3	28	21
4	28	21
5	28	21
6	28	21
7	28	21
8	28	21
9	28	21
10	28	21
11	28	21
12	28	21
13	28	21
14	28	21
15	28	21
16	28	21
17	28	21
18	28	21
19	28	21
20	28	21
21	28	21
22	28	21
23	28	21
24	28	21
25	28	21
26	28	20
27	28	20
28	28	20
29	28	20
30	28	20
31	28	20

	Clearer (%)	Cloudier (%)
1	19	81
2	19	81
3	19	81
4	20	80
5	19	81
6	20	80
7	20	80
8	20	80
9	20	80
10	20	80
11	20	80
12	20	80
13	21	79
14	22	78
15	22	78
16	22	78
17	22	78
18	22	78
19	22	78
20	22	78
21	22	78
22	22	78
23	22	78
24	22	78
25	22	78
26	22	78
27	22	78
28	22	78
29	22	78
30	21	79
31	21	79

	Rain chance (%)
1	77
2	77
3	77
4	77
5	77
6	77
7	78
8	78
9	78
10	78
11	78
12	78
13	78
14	78
15	78
16	78
17	78
18	78
19	78
20	78
21	79
22	79
23	79
24	79
25	80
26	80
27	80
28	81
29	81
30	81
31	81

	Muggy (%)	Oppressive (%)
1	24	76
2	24	76
3	24	76
4	24	76
5	24	76
6	24	76
7	24	76
8	24	76
9	24	76
10	24	76
11	24	76
12	24	76
13	24	76
14	24	76
15	24	76
16	24	76
17	25	75
18	26	74
19	26	74
20	27	73
21	28	72
22	29	71
23	30	70
24	31	69
25	32	68
26	33	67
27	35	65
28	36	64
29	38	62
30	39	61
31	41	59

	Avg high (°C)	Avg low (°C)
1	28	21
2	28	21
3	28	21
4	28	21
5	28	21
6	28	21
7	28	21
8	28	21
9	28	21
10	28	21
11	28	21
12	28	21
13	28	21
14	28	21
15	28	21
16	28	21
17	28	21
18	28	21
19	28	21
20	28	21
21	28	21
22	28	21
23	28	21
24	28	21
25	28	21
26	28	20
27	28	20
28	28	20
29	28	20
30	28	20
31	28	20

	Clearer (%)	Cloudier (%)
1	19	81
2	19	81
3	19	81
4	20	80
5	19	81
6	20	80
7	20	80
8	20	80
9	20	80
10	20	80
11	20	80
12	20	80
13	21	79
14	22	78
15	22	78
16	22	78
17	22	78
18	22	78
19	22	78
20	22	78
21	22	78
22	22	78
23	22	78
24	22	78
25	22	78
26	22	78
27	22	78
28	22	78
29	22	78
30	21	79
31	21	79

	Rain chance (%)
1	77
2	77
3	77
4	77
5	77
6	77
7	78
8	78
9	78
10	78
11	78
12	78
13	78
14	78
15	78
16	78
17	78
18	78
19	78
20	78
21	79
22	79
23	79
24	79
25	80
26	80
27	80
28	81
29	81
30	81
31	81

	Muggy (%)	Oppressive (%)
1	24	76
2	24	76
3	24	76
4	24	76
5	24	76
6	24	76
7	24	76
8	24	76
9	24	76
10	24	76
11	24	76
12	24	76
13	24	76
14	24	76
15	24	76
16	24	76
17	25	75
18	26	74
19	26	74
20	27	73
21	28	72
22	29	71
23	30	70
24	31	69
25	32	68
26	33	67
27	35	65
28	36	64
29	38	62
30	39	61
31	41	59

	Avg high (°C)	Avg low (°C)
1	28	21
2	28	21
3	28	21
4	28	21
5	28	21
6	28	21
7	28	21
8	28	21
9	28	21
10	28	21
11	28	21
12	28	21
13	28	21
14	28	21
15	28	21
16	28	21
17	28	21
18	28	21
19	28	21
20	28	21
21	28	21
22	28	21
23	28	21
24	28	21
25	28	21
26	28	20
27	28	20
28	28	20
29	28	20
30	28	20
31	28	20

	Clearer (%)	Cloudier (%)
1	19	81
2	19	81
3	19	81
4	20	80
5	19	81
6	20	80
7	20	80
8	20	80
9	20	80
10	20	80
11	20	80
12	20	80
13	21	79
14	22	78
15	22	78
16	22	78
17	22	78
18	22	78
19	22	78
20	22	78
21	22	78
22	22	78
23	22	78
24	22	78
25	22	78
26	22	78
27	22	78
28	22	78
29	22	78
30	21	79
31	21	79

	Rain chance (%)
1	77
2	77
3	77
4	77
5	77
6	77
7	78
8	78
9	78
10	78
11	78
12	78
13	78
14	78
15	78
16	78
17	78
18	78
19	78
20	78
21	79
22	79
23	79
24	79
25	80
26	80
27	80
28	81
29	81
30	81
31	81

	Muggy (%)	Oppressive (%)
1	24	76
2	24	76
3	24	76
4	24	76
5	24	76
6	24	76
7	24	76
8	24	76
9	24	76
10	24	76
11	24	76
12	24	76
13	24	76
14	24	76
15	24	76
16	24	76
17	25	75
18	26	74
19	26	74
20	27	73
21	28	72
22	29	71
23	30	70
24	31	69
25	32	68
26	33	67
27	35	65
28	36	64
29	38	62
30	39	61
31	41	59