Saint-Denis in Winter
In winter (June, July and August), Saint-Denis sees average daytime highs around 21°C and overnight lows near 17°C, with 110 mm of rain over about 33 wet days across the season. It is the coldest season of the year and the driest season of the year.
Across winter, daytime highs hold fairly steady around 21°C. The sky is clear or mostly clear about 53% of the time across winter, and the air most often feels comfortable.
Winter is Saint-Denis's best season of the year to visit on our travel score. Saint-Denis has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Saint-Denis's year-round climate.
- Avg daytime high
- 21°C
- coldest season of the year
- Avg overnight low
- 17°C
- Rainfall
- 110 mm
- 33 wet days
- Avg wind
- 8 km/h
- Travel score
- 6.6
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Saint-Denis in Winter
Across winter, daytime highs hold fairly steady around 21°C.
A typical winter day in Saint-Denis reaches about 21°C and drops to 17°C overnight. The warmest of the three months is June, the coolest August.
Saint-Denis weather by month
How the three winter months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 26° / 22° | 251 | 21.7 | 13.1 | 4.9 |
| Feb | 26° / 22° | 244 | 21.9 | 12.7 | 4.5 |
| Mar | 26° / 22° | 219 | 22 | 12.1 | 5.0 |
| Apr | 25° / 21° | 78 | 16.7 | 11.5 | 5.8 |
| May | 23° / 19° | 74 | 16 | 11 | 6.2 |
| Jun | 21° / 17° | 40 | 11 | 10.8 | 6.6 |
| Jul | 21° / 16° | 36 | 11.9 | 10.9 | 6.5 |
| Aug | 21° / 16° | 34 | 10 | 11.3 | 6.8 |
| Sep | 21° / 17° | 36 | 10.1 | 11.9 | 6.8 |
| Oct | 23° / 18° | 47 | 11 | 12.5 | 6.7 |
| Nov | 24° / 19° | 84 | 15.4 | 13 | 6.1 |
| Dec | 25° / 21° | 138 | 18.9 | 13.2 | 5.4 |
Cloud cover in Winter
The sky is clear or mostly clear about 53% of the time across winter.
Chance of precipitation in Winter
Saint-Denis gets around 110 mm of rain over 33 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 8 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 10 h 48 min in early June to 11 h 36 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 4.3 kWh/m².
Hazard calendar for Saint-Denis
None of Saint-Denis's seasonal hazards peak in winter. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Saint-Denis sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Saint-Denis's monsoon runs December–March, when most of the year's rain falls.
Is winter a good time to visit Saint-Denis?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a reasonable time to visit Saint-Denis for sightseeing.
What to pack for Saint-Denis in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Saint-Denis sees daytime highs around 21°C and nights near 17°C. Worth packing: rain gear and sun protection. About 33 days see rain.
Sea temperature near Saint-Denis in Winter
The nearest coast averages about 24°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in February at about 28°C and coldest in August near 24°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 28 | 28 | 28 | 28 | 27 | 25 | 24 | 24 | 24 | 24 | 25 | 27 |
| Comfort | Warm | Tropical | Tropical | Warm | Warm | Warm | Warm | Refreshing | Refreshing | Warm | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Warm |
| Feb | 28 | Tropical |
| Mar | 28 | Tropical |
| Apr | 28 | Warm |
| May | 27 | Warm |
| Jun | 25 | Warm |
| Jul | 24 | Warm |
| Aug | 24 | Refreshing |
| Sep | 24 | Refreshing |
| Oct | 24 | Warm |
| Nov | 25 | Warm |
| Dec | 27 | Warm |
UV index in Saint-Denis in Winter
Clear-sky midday UV across winter averages around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Saint-Denis peaks around January 18 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 6 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 16 | 15 | 13 | 10 | 8 | 6 | 6 | 9 | 10 | 12 | 13 | 14 |
| Level | Extreme | Extreme | Extreme | Very high | Very high | High | High | Very high | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 16 | Extreme |
| Feb | 15 | Extreme |
| Mar | 13 | Extreme |
| Apr | 10 | Very high |
| May | 8 | Very high |
| Jun | 6 | High |
| Jul | 6 | High |
| Aug | 9 | Very high |
| Sep | 10 | Extreme |
| Oct | 12 | Extreme |
| Nov | 13 | Extreme |
| Dec | 14 | Extreme |
Where is Saint-Denis?
Saint-Denis sits at 20.9°S, 55.5°E, 44 m above sea level, in Reunion. The nearest listed city is Sainte-Marie, 11 km away.
Topography around Saint-Denis
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Saint-Denis.
Within 3 km, the terrain around Saint-Denis has large variations in elevation — a maximum elevation change of 635 m around an average of 104 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,258 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,030 m.
The land around Saint-Denis is covered by water (40%), trees (33%) and artificial surfaces (24%) within 3 km, water (55%) and trees (34%) within 16 km, and water (78%) within 80 km.
Reunion travel facts
- Power plugs
- Type C / E
- 220 V · 50 Hz
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 Saint-Denis (-20.8823°, 55.4504°, elevation 44 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.