Saint-Louis climate

Name: Saint-Louis
Address: SN

Saint-Louis is warmest in October, with average highs of 32 °C, and coldest in January, when nights average 18 °C. August is the wettest month (67 mm) and May the driest (0.06 mm). Figures are 1991–2020 climate normals.

Across a full year Saint-Louis averages 172 mm of rain and 338 days above 25 °C.

Senegal · population 254,171 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month October 32 °C
Coldest month January 18 °C
Driest month May 0 mm
Wettest month August 67 mm
Least cloud May 24 % cloud
Hottest on record April 44 °C
Coldest on record January 13 °C
Warmest sea September 28 °C

What to expectSaint-Louis through the year

Saint-Louis has a clear annual cycle: average daily highs run from 28 °C in January to 32 °C in October, a swing of 5.9 °C in mean temperature across the year.

Counted across a normal year, 338 days a year reach 25 °C, 149 of them reach 30 °C. The warmest reading in the 1991–2020 record is 44 °C, in April.

Rain is strongly seasonal. August averages 67 mm against 0 mm in May — 1,123 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Saint-Louis is warmest in September at 28 °C and coldest in February at 19 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	27.5 °C	3 mm	42 %
February	27.9 °C	2 mm	39 %
March	28.4 °C	under 1 mm	27 %
April	28.0 °C	under 1 mm	27 %
May	28.3 °C	under 1 mm	24 %
June	28.9 °C	1 mm	28 %
July	29.5 °C	16 mm	45 %
August	30.1 °C	67 mm	61 %
September	31.0 °C	62 mm	55 %
October	32.3 °C	17 mm	39 %
November	31.5 °C	1 mm	48 %
December	29.0 °C	2 mm	48 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	27.5 °C	18.3 °C	22.6 °C	37.9 °C	12.6 °C	24	6
February	27.9 °C	18.9 °C	22.9 °C	38.9 °C	14.8 °C	22	7
March	28.4 °C	19.3 °C	23.1 °C	40.5 °C	15.4 °C	25	10
April	28.0 °C	19.4 °C	22.9 °C	43.5 °C	15.8 °C	25	7
May	28.3 °C	20.6 °C	23.7 °C	42.5 °C	17.3 °C	29	7
June	28.9 °C	22.7 °C	25.3 °C	42.8 °C	18.7 °C	30	6
July	29.5 °C	24.6 °C	26.7 °C	36.3 °C	21.1 °C	31	10
August	30.1 °C	25.7 °C	27.6 °C	35.8 °C	22.9 °C	31	16
September	31.0 °C	26.1 °C	28.2 °C	40.6 °C	23.2 °C	30	22
October	32.3 °C	25.5 °C	28.4 °C	41.8 °C	21.7 °C	31	27
November	31.5 °C	23.1 °C	26.8 °C	40.4 °C	18.2 °C	30	21
December	29.0 °C	20.2 °C	24.2 °C	38.1 °C	14.8 °C	30	10

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	3 mm	0	11 h/day	42 %	38 %	23 km/h	19.6 °C
February	2 mm	0	12 h/day	39 %	43 %	24 km/h	18.6 °C
March	under 1 mm	0	12 h/day	27 %	51 %	24 km/h	18.7 °C
April	under 1 mm	0	13 h/day	27 %	61 %	25 km/h	19.1 °C
May	under 1 mm	0	13 h/day	24 %	65 %	25 km/h	20.7 °C
June	1 mm	0	13 h/day	28 %	73 %	23 km/h	23.9 °C
July	16 mm	2	13 h/day	45 %	75 %	23 km/h	26.4 °C
August	67 mm	9	13 h/day	61 %	78 %	21 km/h	27.7 °C
September	62 mm	8	12 h/day	55 %	77 %	19 km/h	28.2 °C
October	17 mm	3	12 h/day	39 %	66 %	21 km/h	27.5 °C
November	1 mm	0	11 h/day	48 %	48 %	21 km/h	25.0 °C
December	2 mm	0	11 h/day	48 %	41 %	22 km/h	22.3 °C

How Saint-Louis compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Saint-Louis	32 °C	18 °C	172 mm	338
Touba · Senegal	38 °C	17 °C	369 mm	365
Thiès · Senegal	34 °C	17 °C	355 mm	364
Thiès Nones · Senegal	33 °C	18 °C	355 mm	362
Diourbel · Senegal	37 °C	18 °C	388 mm	365
Rufisque · Senegal	32 °C	19 °C	292 mm	350
Dakar · Senegal	30 °C	19 °C	287 mm	299

Where Saint-Louis ranks

Ranking	Position	Value
The driest places in Africa in May	1st of 50	0.06 mm
The driest places in the world in May	2nd of 50	0.06 mm
Best beach destinations in Africa year-round	6th of 50	88/100
Best beach destinations in Africa in December	7th of 50	95/100
Best beach destinations in Africa in November	9th of 50	92/100
Best beach destinations in Africa in July	10th of 50	98/100

Planning a trip? See the best time to visit Saint-Louis.

QuestionsCommon questions about Saint-Louis’s climate

When is the best time to visit Saint-Louis?

That depends on what you want, so the honest answer is a comparison rather than a single month. January, February, April sit closest to 20 °C on average, October is the warmest month and May the driest. The month-by-month table above has the full picture.

How hot does Saint-Louis get?

In October, the warmest month, daily highs average 32 °C. About 149 days a year pass 30 °C. The highest value in the 1991–2020 record is 44 °C.

How cold does it get in winter?

Nights average 18 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Saint-Louis?

August, averaging 67 mm over 9 days with rain. The driest month is May with 0 mm. The year as a whole averages 172 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Saint-Louis rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 16.018°, -16.490° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.