Koro weather in September

In September, Koro sees average daytime highs of 34°C and overnight lows near 24°C, with 69 mm of rain across 10.8 wet days and about 12.1 hours of daylight. It is the 9th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 32°C in the first days to 35°C by the end. The sky is clear or mostly clear about 38% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Koro's 10th-clearest and 11th-windiest month. For the whole year in context, see Koro's year-round climate.

Daytime high
34°
9th warmest
Overnight low
24°
8th coldest
Rainfall
69 mm
10.8 wet days
Daylight
12 h 06 min
6:04 AM – 6:09 PM
Cloud cover
52%
10th clearest
Wind
8 km/h
11th windiest
Solar energy
6.26 kWh/m²
Travel score
3.1
out of 10

Koro is city in Mali.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 32°C in the first days to 35°C by the end.

A typical September day in Koro reaches about 34°C in the afternoon and slips back to 24°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 36°C. Set against its neighbours, September runs about 2°C warmer than August and about 3°C cooler than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13224
23224
33224
43224
53224
63224
73324
83324
93324
103324
113324
123324
133324
143324
153324
163424
173424
183424
193424
203424
213424
223424
233524
243524
253524
263524
273524
283525
293525
303625

How September really feels in Koro

Once humidity and wind are folded in, September averages 30 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
30
7 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

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

Koro weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 16°10.111.36.1
Feb34° / 18°0011.54.0
Mar38° / 22°00.111.91.5
Apr40° / 25°51.512.30.1
May40° / 28°82.812.60.1
Jun38° / 27°287.112.81.2
Jul34° / 25°991512.72.6
Aug32° / 24°15917.612.53.3
Sep34° / 24°6910.812.13.1
Oct37° / 23°143.411.72.0
Nov36° / 19°0011.32.9
Dec32° / 16°0011.25.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 24% of September, with mostly cloudy or overcast conditions the remaining 38%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14951
24951
35149
45149
55248
65347
75446
85545
95644
105743
115842
125941
136040
146139
156139
166238
176436
186436
196535
206634
216733
226931
236931
247129
257129
267228
277327
287327
297327
307327

Chance of precipitation in September

Any precipitation

Koro gets around 69 mm of rain over 10.8 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 36% and peaks near 49% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
149
248
348
447
546
645
744
843
942
1042
1141
1240
1339
1438
1537
1636
1735
1834
1933
2032
2131
2230
2329
2428
2527
2626
2725
2823
2922
3022

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 82% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10001954
20001954
30001954
40001945
50001945
60002935
70002935
80002935
90003925
100003925
110004915
120004906
130005896
140006886
150007876
160008866
170009856
1800011845
1900112825
2000114805
2100116785
2200218764
2300220744
2400322714
2500424693
2600526663
2710628632
2811730592
2911832562
3011933542

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over September. Sunrise moves from 6:04 AM to 6:05 AM, and sunset from 6:20 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:046:20
212.36:046:20
312.26:046:19
412.26:046:18
512.26:046:17
612.26:046:17
712.26:046:16
812.26:046:15
912.26:046:14
1012.26:046:14
1112.16:046:13
1212.16:046:12
1312.16:046:11
1412.16:046:10
1512.16:046:10
1612.16:046:09
1712.16:046:08
1812.16:046:07
1912.06:046:07
2012.06:046:06
2112.06:046:05
2212.06:056:04
2312.06:056:04
2412.06:056:03
2512.06:056:02
2611.96:056:01
2711.96:056:01
2811.96:056:00
2911.96:055:59
3011.96:055:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.26 kWh/m².

For context, solar energy here swings from a low near 5.5 kWh/m² to a high of 6.97 kWh/m² in April across the year — September's 6.26 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.0Bright
26.0Intense
36.0Intense
46.1Intense
56.1Intense
66.1Intense
76.1Intense
86.2Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.2Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.3Intense
206.3Intense
216.3Intense
226.3Intense
236.3Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
Planning a trip in September

Hazard calendar for Koro

In seasonPeak

In September, Koro sits inside its dust season. The full year is below, with each hazard's peak months called out.

Koro sees seasonal dust haze (January–October), heaviest in May.

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

Is September a good time to visit Koro?

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

3.1
Sightseeing
5th-best month of the year
5.8
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in Koro.

What to pack for Koro in September

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

In September, Koro sees daytime highs around 34°C and nights near 24°C. Pack light clothes and sun protection. Worth having: rain gear. About 11 days see rain.

light clothessun protectionrain gear

UV index in Koro in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Koro peaks around March 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highMar 16UV 13Dec 17UV 8
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar14Extreme
Apr11Extreme
May11Extreme
Jun11Extreme
Jul11Extreme
Aug13Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Koro in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Koro is worst in February — around 70 µg/m³ PM2.5 (unhealthy), about 5.0× the cleanest month (August, 14 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorFeb 2270 µg/m³Aug 2014 µg/m³
PM2.5 (µg/m³)Level
Jan62Unhealthy
Feb70Unhealthy
Mar70Unhealthy
Apr57Unhealthy
May45Poor
Jun38Poor
Jul22Moderate
Aug14Moderate
Sep17Moderate
Oct32Moderate
Nov36Poor
Dec52Poor
Location & terrain

Where is Koro?

Koro sits at 14.1°N, 3.1°W, 260 m above sea level, in Mali. The nearest listed city is Bankass, 48 km away.

DouentzaTouganTitaoGourcyMopti

Topography around Koro

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

Within 3 km, the terrain around Koro has only modest variations in elevation — a maximum elevation change of 5 m around an average of 257 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 15 m; within 80 km, significant variations in elevation — a maximum elevation change of 505 m.

The land around Koro is covered by cropland (45%) and grassland (33%) within 3 km, cropland (62%) and grassland (29%) within 16 km, and grassland (58%) and cropland (24%) within 80 km.

3 km
5 m
16 km
15 m
80 km
505 m
shrubsgrasslandcroplandartificial surfacesbare terrainwetland
September weather nearby: Bankass 48 km · Bandiagara 66 km · Ouahigouya 89 km · Douentza 106 km · Tougan 110 km · Titao 114 km · Gourcy 123 km · Mopti 128 km

Mali travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type C / E
220 V · 50 Hz
Prices
≈ 34% of US
price level, 2025
GDP per capita
$1,193
2025
Happiness
4.6 / 10
World Happiness, 2025
Road deaths
22.7
per 100k/yr, 2019
Income group
Low
World Bank
English
Very low
EF EPI 408
Religion
Muslim 94%Christian 3%none 3%animist 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 Koro (14.064°, -3.0754°, elevation 260 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).