San weather in September

In September, San sees average daytime highs of 32°C and overnight lows near 24°C, with 107 mm of rain across 14.8 wet days and about 12.1 hours of daylight. It is the 10th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 31°C in the first days to 33°C by the end. The sky is clear or mostly clear about 28% 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 San's 10th-clearest and 12th-windiest month. For the whole year in context, see San's year-round climate.

Daytime high
32°
10th warmest
Overnight low
24°
6th coldest
Rainfall
107 mm
14.8 wet days
Daylight
12 h 06 min
6:12 AM – 6:16 PM
Cloud cover
58%
10th clearest
Wind
7 km/h
12th windiest
Solar energy
5.97 kWh/m²
Travel score
3.5
out of 10

San is town in Mali.

Density
666/km²
people per km²
Founded
1400

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 31°C in the first days to 33°C by the end.

A typical September day in San reaches about 32°C in the afternoon and slips back to 24°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°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
33124
43124
53124
63124
73124
83124
93124
103224
113224
123224
133224
143224
153224
163224
173224
183224
193224
203224
213324
223324
233324
243324
253324
263324
273324
283324
293424
303424

How September really feels in San

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.

San weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 18°10.211.35.3
Feb35° / 21°0011.63.4
Mar38° / 24°10.411.91.3
Apr40° / 27°92.612.30.3
May39° / 28°205.912.60.6
Jun36° / 27°4310.412.81.9
Jul33° / 25°12317.412.73.0
Aug31° / 24°19620.912.43.3
Sep32° / 24°10714.812.13.5
Oct35° / 24°265.811.72.7
Nov35° / 21°10.211.43.0
Dec33° / 18°0011.24.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 50%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13367
23565
33565
43763
53862
64060
74060
84258
94357
104555
114654
124753
134753
144852
155050
165149
175248
185446
195446
205644
215743
225743
235941
246040
256040
266238
276337
286337
296436
306436

Chance of precipitation in September

Any precipitation

San gets around 107 mm of rain over 14.8 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 49% and peaks near 64% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
164
263
363
462
561
660
759
858
957
1056
1155
1254
1353
1452
1551
1650
1749
1848
1946
2045
2144
2242
2341
2439
2538
2637
2735
2834
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 89% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1000946
2000946
3000946
4000946
5000946
6000946
7000946
8000946
9000937
10000937
11000937
12000928
13000928
14000919
15000919
160009010
170009010
180008911
190018811
200018811
210018811
220028711
230028810
240038710
250048610
26015859
27016849
28018838
290110818
301211797

Wind in September

Winds average 7 km/h in September, the calmest month.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:11 AM to 6:12 AM, and sunset from 6:27 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:116:27
212.26:126:26
312.26:126:26
412.26:126:25
512.26:126:24
612.26:126:24
712.26:126:23
812.26:126:22
912.26:126:21
1012.16:126:21
1112.16:126:20
1212.16:126:19
1312.16:126:18
1412.16:126:18
1512.16:126:17
1612.16:126:16
1712.16:126:15
1812.06:126:15
1912.06:126:14
2012.06:126:13
2112.06:126:12
2212.06:126:12
2312.06:126:11
2412.06:126:10
2512.06:126:09
2611.96:126:09
2711.96:126:08
2811.96:126:07
2911.96:126:06
3011.96:126:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.97 kWh/m².

For context, solar energy here swings from a low near 5.35 kWh/m² to a high of 6.79 kWh/m² in March across the year — September's 5.97 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.6Bright
35.6Bright
45.6Bright
55.7Bright
65.7Bright
75.7Bright
85.8Bright
95.8Bright
105.8Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
156.0Bright
166.0Bright
176.0Intense
186.0Intense
196.0Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
Planning a trip in September

Hazard calendar for San

In seasonPeak

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

San's monsoon runs July–September, when most of the year's rain falls.

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

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

Is September a good time to visit San?

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

3.5
Sightseeing
3rd-best month of the year
5.6
Beach & pool
6th-best month of the year

September is a weaker month for outdoor sightseeing in San.

What to pack for San in September

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

In September, San sees daytime highs around 32°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

UV index in San 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 San peaks around March 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 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 17UV 13Jan 10UV 8
UV index (midday)Level
Jan8Very high
Feb10Extreme
Mar13Extreme
Apr11Extreme
May11Extreme
Jun11Extreme
Jul11Extreme
Aug13Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in San 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 San is worst in March — around 68 µg/m³ PM2.5 (unhealthy), about 4.7× the cleanest month (August, 14 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorMar 1068 µg/m³Aug 1815 µg/m³
PM2.5 (µg/m³)Level
Jan55Poor
Feb67Unhealthy
Mar68Unhealthy
Apr56Unhealthy
May41Poor
Jun33Moderate
Jul21Moderate
Aug14Moderate
Sep19Moderate
Oct29Moderate
Nov32Moderate
Dec46Poor
Location & terrain

Where is San?

San sits at 13.3°N, 4.9°W, 277 m above sea level, in Mali. The nearest listed city is Djenné, 77 km away.

BlaYorossoDiourouMoninnpébougouKoutialaKouri

Topography around San

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

Within 3 km, the terrain around San has only modest variations in elevation — a maximum elevation change of 21 m around an average of 278 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 39 m; within 80 km, only modest variations in elevation — a maximum elevation change of 205 m.

The land around San is covered by artificial surfaces (40%) and cropland (37%) within 3 km, grassland (40%) and cropland (38%) within 16 km, and grassland (43%), cropland (30%) and shrubs (21%) within 80 km.

3 km
21 m
16 km
39 m
80 km
205 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Djenné 77 km · Ké-Macina 89 km · Bla 101 km · Yorosso 105 km · Diourou 110 km · Moninnpébougou 116 km · Koutiala 118 km · Kouri 124 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 San (13.297°, -4.8963°, elevation 277 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).