Saint-Denis climate

Name: Saint-Denis
Address: RE

Saint-Denis is warmest in February, with average highs of 28 °C, and coldest in August, when nights average 19 °C. January is the wettest month (266 mm) and August the driest (35 mm). Figures are 1991–2020 climate normals.

Across a full year Saint-Denis averages 1,344 mm of rain and 233 days above 25 °C.

Reunion · population 154,765 · 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 February 28 °C
Coldest month August 19 °C
Driest month August 35 mm
Wettest month January 266 mm
Least cloud July 35 % cloud
Hottest on record December 32 °C
Coldest on record July 14 °C
Warmest sea February 28 °C

What to expectSaint-Denis through the year

Saint-Denis has a clear annual cycle: average daily highs run from 24 °C in August to 28 °C in February, a swing of 5.3 °C in mean temperature across the year.

Counted across a normal year, 233 days a year reach 25 °C, 4 of them reach 30 °C. The warmest reading in the 1991–2020 record is 32 °C, in December.

Rain is strongly seasonal. January averages 266 mm against 35 mm in August — 7.5 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Saint-Denis is warmest in February at 28 °C and coldest in August at 24 °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	28.2 °C	266 mm	65 %
February	28.2 °C	256 mm	64 %
March	28.1 °C	244 mm	60 %
April	27.4 °C	81 mm	50 %
May	25.7 °C	72 mm	43 %
June	24.3 °C	40 mm	36 %
July	23.5 °C	37 mm	35 %
August	23.6 °C	35 mm	35 %
September	24.3 °C	37 mm	38 %
October	25.3 °C	50 mm	45 %
November	26.3 °C	84 mm	51 %
December	27.5 °C	141 mm	57 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	28.2 °C	24.9 °C	26.5 °C	32.0 °C	22.2 °C	31	2
February	28.2 °C	25.1 °C	26.6 °C	32.1 °C	22.6 °C	28	1
March	28.1 °C	24.8 °C	26.3 °C	32.1 °C	21.3 °C	31	1
April	27.4 °C	23.8 °C	25.5 °C	30.9 °C	20.5 °C	30	0
May	25.7 °C	22.1 °C	23.7 °C	29.1 °C	17.6 °C	22	0
June	24.3 °C	20.3 °C	22.2 °C	27.0 °C	16.7 °C	6	0
July	23.5 °C	19.3 °C	21.3 °C	26.5 °C	14.4 °C	1	0
August	23.6 °C	19.2 °C	21.3 °C	26.8 °C	15.8 °C	2	0
September	24.3 °C	19.7 °C	21.9 °C	28.6 °C	16.0 °C	7	0
October	25.3 °C	20.9 °C	23.0 °C	28.9 °C	16.9 °C	19	0
November	26.3 °C	22.3 °C	24.2 °C	29.8 °C	17.9 °C	26	0
December	27.5 °C	23.9 °C	25.6 °C	32.2 °C	21.4 °C	31	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	266 mm	21	13 h/day	65 %	81 %	12 km/h	27.7 °C
February	256 mm	22	13 h/day	64 %	83 %	12 km/h	28.1 °C
March	244 mm	21	12 h/day	60 %	81 %	12 km/h	28.0 °C
April	81 mm	16	12 h/day	50 %	80 %	11 km/h	27.5 °C
May	72 mm	15	11 h/day	43 %	78 %	11 km/h	26.6 °C
June	40 mm	10	11 h/day	36 %	76 %	11 km/h	25.2 °C
July	37 mm	10	11 h/day	35 %	75 %	12 km/h	24.0 °C
August	35 mm	9	11 h/day	35 %	74 %	12 km/h	23.5 °C
September	37 mm	10	12 h/day	38 %	74 %	12 km/h	23.6 °C
October	50 mm	11	13 h/day	45 %	75 %	12 km/h	24.3 °C
November	84 mm	15	13 h/day	51 %	77 %	11 km/h	25.4 °C
December	141 mm	18	13 h/day	57 %	79 %	11 km/h	26.9 °C

Where Saint-Denis ranks

Ranking	Position	Value
Warmest sea temperatures in Africa in February	27th of 50	28 °C
Warmest sea temperatures in Africa in January	27th of 50	28 °C
Best beach destinations in Africa in March	35th of 50	72/100
Best beach destinations in Africa in April	37th of 50	73/100
Warmest sea temperatures in Africa in March	39th of 50	28 °C
Best beach destinations in Africa in November	46th of 50	75/100

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

QuestionsCommon questions about Saint-Denis’s climate

When is the best time to visit Saint-Denis?

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

How hot does Saint-Denis get?

In February, the warmest month, daily highs average 28 °C. About 4 days a year pass 30 °C. The highest value in the 1991–2020 record is 32 °C.

How cold does it get in winter?

Nights average 19 °C in August, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Saint-Denis?

January, averaging 266 mm over 21 days with rain. The driest month is August with 35 mm. The year as a whole averages 1,344 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-Denis 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: -20.882°, 55.450° (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.