Saint-Louis in Fall
In fall (March, April and May), Saint-Louis sees average daytime highs around 24°C and overnight lows near 19°C, with 390 mm of rain over about 57 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 25°C in early March to 21°C by late May. The sky is clear or mostly clear about 18% of the time across fall, and the air most often feels muggy.
Fall is Saint-Louis's 3rd-best season to visit on our travel score. For the whole year in context, see Saint-Louis's year-round climate.
- Avg daytime high
- 24°C
- 2nd-warmest season
- Avg overnight low
- 19°C
- Rainfall
- 390 mm
- 57 wet days
- Avg wind
- 8 km/h
- Travel score
- 5.5
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Saint-Louis in Fall
Over the season highs ease from about 25°C in early March to 21°C by late May.
A typical fall day in Saint-Louis reaches about 24°C and drops to 19°C overnight. The warmest of the three months is March, the coolest May.
Saint-Louis weather by month
How the three fall months (March, April and May) 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 Fall
The sky is clear or mostly clear about 18% of the time across fall.
Chance of precipitation in Fall
Saint-Louis gets around 390 mm of rain over 57 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 8 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 30 min in early March to 10 h 48 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 5.1 kWh/m².
Hazard calendar for Saint-Louis
In fall, Saint-Louis overlaps its cyclone and monsoon 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 fall a good time to visit Saint-Louis?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Saint-Louis for sightseeing.
What to pack for Saint-Louis in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Saint-Louis sees daytime highs around 24°C and nights near 19°C. Pack rain gear. Worth having: light clothes and sun protection. About 57 days see rain.
Sea temperature near Saint-Louis in Fall
The nearest coast averages about 27°C across fall — 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 Fall
Clear-sky midday UV across fall averages around 10 (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.