Diéma weather in September

In September, Diéma sees average daytime highs of 33°C and overnight lows near 24°C, with 112 mm of rain across 14 wet days and about 12.1 hours of daylight. It is the 9th-warmest and 2nd-wettest month of the year here.

Highs climb over the month, from about 31°C in the first days to 34°C by the end. The sky is clear or mostly clear about 31% 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 Diéma's 10th-clearest and 12th-windiest month. For the whole year in context, see Diéma's year-round climate.

Daytime high
33°
9th warmest
Overnight low
24°
8th coldest
Rainfall
112 mm
14 wet days
Daylight
12 h 06 min
6:29 AM – 6:33 PM
Cloud cover
59%
10th clearest
Wind
8 km/h
12th windiest
Solar energy
5.92 kWh/m²
Travel score
3.3
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 31°C in the first days to 34°C by the end.

A typical September day in Diéma reaches about 33°C in the afternoon and slips back to 24°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 35°C. Set against its neighbours, September runs about 1°C warmer than August and about 3°C cooler than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13124
23124
33224
43224
53224
63224
73224
83224
93224
103224
113224
123224
133224
143224
153224
163324
173324
183324
193324
203324
213324
223324
233324
243424
253424
263424
273424
283424
293424
303424

How September really feels in Diéma

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
heat index over the day's high
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.

Diéma weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 17°10.211.25.6
Feb34° / 20°00.111.53.7
Mar38° / 23°10.211.91.5
Apr40° / 26°10.512.30.0
May41° / 28°92.412.70.0
Jun39° / 28°337.512.80.8
Jul34° / 25°11114.812.82.8
Aug31° / 24°18518.512.53.4
Sep33° / 24°1121412.13.3
Oct36° / 23°305.411.72.3
Nov35° / 20°10.211.32.9
Dec32° / 18°00.111.24.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 51%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13466
23466
33664
43664
53862
63862
74159
84258
94258
104555
114555
124753
134753
144951
155050
165149
175248
185347
195446
205545
215644
225743
235743
245941
255941
266040
276040
286040
296139
306139

Chance of precipitation in September

Any precipitation

Diéma gets around 112 mm of rain over 14 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 47% and peaks near 61% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
161
260
359
458
557
656
755
853
952
1051
1151
1250
1349
1448
1547
1646
1745
1845
1944
2043
2142
2241
2340
2438
2537
2636
2735
2833
2933
3032

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 79% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100008416
200008416
300008317
400008317
500008317
600008218
700008218
800008218
900008119
1000008119
1100008119
1200008020
1300008020
1400008020
1500017920
1600017920
1700017920
1800017920
1900018019
2000027919
2100028018
2200037918
2300147817
2400157816
2500167815
2600277714
2711297413
28112107412
29113127211
30113147110

Wind in September

Winds average 8 km/h in September, the calmest month.

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 6:28 AM to 6:30 AM, and sunset from 6:45 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:286:45
212.36:286:44
312.36:286:44
412.26:286:43
512.26:286:42
612.26:286:41
712.26:286:41
812.26:286:40
912.26:286:39
1012.26:286:38
1112.16:286:37
1212.16:296:37
1312.16:296:36
1412.16:296:35
1512.16:296:34
1612.16:296:33
1712.16:296:33
1812.16:296:32
1912.06:296:31
2012.06:296:30
2112.06:296:30
2212.06:296:29
2312.06:296:28
2412.06:296:27
2512.06:296:26
2611.96:296:26
2711.96:296:25
2811.96:296:24
2911.96:296:23
3011.96:306:23

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.92 kWh/m².

For context, solar energy here swings from a low near 5.27 kWh/m² to a high of 7.23 kWh/m² in April across the year — September's 5.92 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.6Bright
45.6Bright
55.6Bright
65.7Bright
75.7Bright
85.7Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.9Bright
145.9Bright
155.9Bright
166.0Bright
176.0Bright
186.0Intense
196.0Intense
206.0Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.1Intense
266.1Intense
276.1Intense
286.2Intense
296.2Intense
306.2Intense
Planning a trip in September

Hazard calendar for Diéma

In seasonPeak

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

Diéma sees seasonal dust haze (February–October), heaviest in June.

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

Is September a good time to visit Diéma?

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

3.3
Sightseeing
5th-best month of the year
5.6
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in Diéma.

What to pack for Diéma in September

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

In September, Diéma sees daytime highs around 33°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 14 days see rain.

light clothesrain gearsun protection

UV index in Diéma 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 Diéma peaks around August 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 17UV 13Dec 18UV 7
UV index (midday)Level
Jan8Very high
Feb10Extreme
Mar13Extreme
Apr11Extreme
May11Extreme
Jun10Very high
Jul11Extreme
Aug13Extreme
Sep12Extreme
Oct10Very high
Nov9Very high
Dec7High

Air quality in Diéma 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 Diéma is worst in February — around 67 µg/m³ PM2.5 (unhealthy), about 4.4× the cleanest month (August, 15 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorFeb 1867 µg/m³Aug 2016 µg/m³
PM2.5 (µg/m³)Level
Jan58Unhealthy
Feb67Unhealthy
Mar64Unhealthy
Apr52Poor
May46Poor
Jun44Poor
Jul24Moderate
Aug15Moderate
Sep19Moderate
Oct47Poor
Nov54Poor
Dec54Poor
Location & terrain

Where is Diéma?

Diéma sits at 14.5°N, 9.2°W, 255 m above sea level, in Mali. The nearest listed city is Nioro, 88 km away.

MahinaKolokaniKitaBafoulabéNaraBanambaTembedgha

Topography around Diéma

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

Within 3 km, the terrain around Diéma has only modest variations in elevation — a maximum elevation change of 19 m around an average of 254 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 70 m; within 80 km, only modest variations in elevation — a maximum elevation change of 243 m.

The land around Diéma is covered by cropland (60%) and grassland (27%) within 3 km, cropland (59%) and grassland (34%) within 16 km, and grassland (58%) and cropland (23%) within 80 km.

3 km
19 m
16 km
70 m
80 km
243 m
shrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Nioro 88 km · Mahina 121 km · Kolokani 165 km · Kita 170 km · Bafoulabé 195 km · Nara 216 km · Banamba 218 km · Tembedgha 218 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 Diéma (14.54°, -9.1921°, elevation 255 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).