Climate averages 1991–2020

Saint-Denis weather
in January.

A hot, very wet month: the 2nd warmest and the wettest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 28.1°C Daytime mean, January

Average low 24.9°C Night-time mean, January

Rainfall 249 mm 22 days with ≥1 mm

Daylight 13 h Sunrise to sunset, per day

January is a hot month in Saint-Denis: daytime highs average 28.1°C and nights cool to about 24.9°C. By daytime temperature it is the 2nd warmest of the 12 months.

Expect about 249 mm of rain on roughly 22 days, which makes January a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 15 min on an average January day.

The nearest other city in this atlas is Saint-Paul (23 km away). In January its highs average 28.1°C, about as warm as Saint-Denis, with 183 mm of rain.

Among the 3 cities listed in Reunion, Saint-Denis ranks joint 2nd of 3 for the warmest January highs and 2nd of 3 for the driest January (rainfall, lowest first). The mean January high of those 3 cities is 28.6°C; Saint-Denis is 0.5°C cooler than that mean.

From January to February, average highs rise by 0.1°C to 28.2°C, and monthly rainfall falls from 249 mm to 245 mm.

The annual picture

January in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Saint-Denis climate table

1991–2020

Monthly climate averages for Saint-Denis, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January, selected	28.1°C24.9°C	24.9°C	249	21.7	13.213 h
February	28.2°C25.1°C	25.1°C	245	22.1	12.813 h
March	28.0°C24.8°C	24.8°C	219	22.0	12.212 h
April	27.3°C23.9°C	23.9°C	78	16.7	11.612 h
May	25.7°C22.2°C	22.2°C	74	16.0	11.111 h
June	24.3°C20.5°C	20.5°C	40	11.0	10.911 h
July	23.5°C19.5°C	19.5°C	36	11.9	11.011 h
August	23.7°C19.3°C	19.3°C	34	10.0	11.411 h
September	24.3°C19.8°C	19.8°C	36	10.1	12.012 h
October	25.3°C21.0°C	21.0°C	47	11.0	12.613 h
November	26.3°C22.3°C	22.3°C	84	15.4	13.113 h
December	27.5°C24.0°C	24.0°C	138	18.9	13.413 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

January in nearby cities

Distance from Saint-Denis

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Saint-Denis) is explained once on the Saint-Denis year overview and on the Sources, method and limits page.