Saint-Louis in Spring
In spring (September, October and November), Saint-Louis sees average daytime highs around 22°C and overnight lows near 16°C, with 197 mm of rain over about 42 wet days across the season. It is the 3rd-warmest season and the 3rd-wettest season.
Over the season highs climb from about 20°C in early September to 24°C by late November. The sky is clear or mostly clear about 23% of the time across spring, and the air most often feels comfortable.
Spring is Saint-Louis's best season of the year to visit on our travel score. For the whole year in context, see Saint-Louis's year-round climate.
- Avg daytime high
- 22°C
- 3rd-warmest season
- Avg overnight low
- 16°C
- Rainfall
- 197 mm
- 42 wet days
- Avg wind
- 7 km/h
- Travel score
- 6.1
- best season of the year
- Months
- Sep · Oct · Nov
Temperature in Saint-Louis in Spring
Over the season highs climb from about 20°C in early September to 24°C by late November.
A typical spring day in Saint-Louis reaches about 22°C and drops to 16°C overnight. The warmest of the three months is November, the coolest September.
Saint-Louis weather by month
How the three spring months (September, October and November) 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 | 25° / 21° | 280 | 23.9 | 13.2 | 4.5 |
| Feb | 25° / 21° | 264 | 22.7 | 12.7 | 4.4 |
| Mar | 25° / 20° | 212 | 21.3 | 12.2 | 5.0 |
| Apr | 24° / 19° | 93 | 18.2 | 11.5 | 5.6 |
| May | 22° / 18° | 86 | 17.1 | 11 | 5.8 |
| Jun | 20° / 16° | 50 | 13.7 | 10.7 | 5.9 |
| Jul | 20° / 15° | 49 | 14.3 | 10.8 | 5.7 |
| Aug | 20° / 15° | 45 | 12.6 | 11.3 | 6.1 |
| Sep | 21° / 15° | 45 | 12 | 11.9 | 6.2 |
| Oct | 22° / 16° | 56 | 13.4 | 12.5 | 6.2 |
| Nov | 24° / 18° | 96 | 16.4 | 13 | 5.8 |
| Dec | 25° / 20° | 174 | 21.6 | 13.3 | 5.0 |
Cloud cover in Spring
The sky is clear or mostly clear about 23% of the time across spring.
Chance of precipitation in Spring
Saint-Louis gets around 197 mm of rain over 42 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 7 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 36 min in early September to 13 h 12 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 6.6 kWh/m².
Hazard calendar for Saint-Louis
In spring, Saint-Louis overlaps its cyclone season. The full year is below, with each hazard's peak months called out.
Saint-Louis sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Saint-Louis's monsoon runs December–March, when most of the year's rain falls.
Is spring a good time to visit Saint-Louis?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a reasonable time to visit Saint-Louis for sightseeing.
What to pack for Saint-Louis in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Saint-Louis sees daytime highs around 22°C and nights near 16°C. Pack rain gear and sun protection. Worth having: light clothes. About 42 days see rain.
Sea temperature near Saint-Louis in Spring
The nearest coast averages about 24°C across spring — 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 23°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 | 27 | 26 | 25 | 24 | 23 | 23 | 24 | 25 | 27 |
| Comfort | Warm | Tropical | Warm | Warm | Warm | Warm | Refreshing | Refreshing | Refreshing | Warm | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Warm |
| Feb | 28 | Tropical |
| Mar | 28 | Warm |
| Apr | 27 | Warm |
| May | 26 | Warm |
| Jun | 25 | Warm |
| Jul | 24 | Refreshing |
| Aug | 23 | Refreshing |
| Sep | 23 | Refreshing |
| Oct | 24 | Warm |
| Nov | 25 | Warm |
| Dec | 27 | Warm |
UV index in Saint-Louis in Spring
Clear-sky midday UV across spring averages 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 Saint-Louis peaks around January 17 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 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) | 17 | 15 | 13 | 10 | 8 | 6 | 6 | 9 | 10 | 12 | 13 | 14 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | High | High | Very high | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 17 | Extreme |
| Feb | 15 | Extreme |
| Mar | 13 | Extreme |
| Apr | 10 | Extreme |
| 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-Louis?
Saint-Louis sits at 21.3°S, 55.4°E, 40 m above sea level, in Reunion. The nearest listed city is Saint-Pierre, 9.0 km away.
Topography around Saint-Louis
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Saint-Louis.
Within 3 km, the terrain around Saint-Louis has only modest variations in elevation — a maximum elevation change of 244 m around an average of 55 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,578 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,030 m.
The land around Saint-Louis is covered by trees (40%) and artificial surfaces (20%) within 3 km, water (43%) and trees (36%) within 16 km, and water (79%) 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-Louis (-21.2858°, 55.4112°, elevation 40 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.