Climate and monthly weather forecastSaint-Louis, Reunion
Climate and monthly weather forecast
The climate of Saint-Louis
Saint-Louis, located in Reunion, has a climate that aligns precisely with the Köppen climate classification referred to as Cfb, also known as Marine west coast, warm summer. This characterization concisely describes the year-round weather conditions prevalent in Saint-Louis.The town experiences a relatively stable range of temperatures throughout the year, with the average highs hovering between 21.3°C (70.3°F) in July to 26.3°C (79.3°F) in January to March period. Correspondingly, the average low temperatures shift in a narrow band from 18.8°C (65.8°F) to 24.3°C (75.7°F). Humidity percentages remain consistently high, with monthly averages ranging from 77% to 81%.
Rainfall in Saint-Louis varies throughout the year, with the wettest months being January, with 162mm (6.38") of rain, while the driest month is September, registering just 10mm (0.39"). The town sees a significant decrease in daylight hours from 13.4h in December to 10.9h in June. Sunshine hours follow a similar pattern, dwindling from 10.9h in October to 6.9h in May. Cloud cover fluctuates moderately between the lowest 21% in September and peaks at 38% in February.
The best time to visit Saint-Louis
Analysing the weather data, the best time to visit Saint-Louis would be between September and November. These months offer an amalgamation of comfortable temperatures, with highs ranging from 21.7°C (71.1°F) to 24.3°C (75.7°F) and lows between 19.5°C (67.1°F) to 21.6°C (70.9°F). Furthermore, these months provide the least amount of rainfall, averaging from 10mm (0.39") to 34mm (1.34") alongside reduced cloud cover percentages. The daylight conditions are favourable as well, stretching from 12h to 13.1h, along with sunshine hours increasing from 9.3h to 10.6h.The worst time to visit Saint-Louis
In contrast, the least appealing period to visit Saint-Louis is between January and March. These months endure the highest temperatures, averaging from 24.3°C (75.7°F) to 26.3°C (79.3°F). Coupled with higher humidity percentages of around 81%, it tends to feel much hotter. The shower intensity also soars, reaching up to 162mm (6.38") in January. Though the daylight hours are longer around this time, ranging from 12.2h to 13.3h, the cloud cover percentage is also at its peak, impeding clear visibility.Spring weather in Saint-Louis
March, April, and May define the spring season in Saint-Louis. March sustains high temperatures, with average highs and lows clocking in at 26.3°C (79.3°F) and 23.9°C (75°F), respectively. But, a transition occurs from April to May, the temperature barometer skews downwards from 25.3°C (77.5°F) to 23.6°C (74.5°F) for average highs and from 22.8°C (73°F) to 21.2°C (70.2°F) for lows. Rainfall decreases from 119mm (4.69") to 44mm (1.73") throughout the spring season, and the overall humidity drops to 79% by May.Summer weather in Saint-Louis
Identified by June, July, and August, the summer months in Saint-Louis present a mildly cool climate with average highs settling between 21.3°C (70.3°F) and 22.3°C (72.1°F). Average low temperatures slide to 18.8°C (65.8°F) in July, the lowest for the year. Rainfall further diminishes during this season, dropping to 16mm (0.63") in July and 11mm (0.43") in August, coupled with relatively low cloud cover around 25%-26%. Humidity also tends to reduce during the summer months, hovering at 77%.Autumn weather in Saint-Louis
September to November is autumn in Saint-Louis, displaying a slight increase in temperatures. Average highs increase from 21.7°C (71.1°F) to 24.3°C (75.7°F), and lows rise from 19.5°C (67.1°F) to 21.6°C (70.9°F). Rainfall totals elevate a bit to 79mm (3.11") by November, but this season still maintains a lower humidity level of 78%-79%. The daylight hours start to increase, peaking at 13.1h in November.Winter weather in Saint-Louis
December to February marks the winter season in Saint-Louis. The average high temperature in December is 25.6°C (78.1°F), which remains constant at 26.3°C (79.3°F) for January and February. This season is characterized by high humidity of 81% and considerable precipitation, with rainfall shooting up to 162mm (6.38") in January. Despite being crowned as one of the rainiest months, daylight duration remains significant, oscillating between 12.8h to 13.3h.Weather in January
In Saint-Louis, Reunion, the month of January kicks off with temperatures similar to those of December. Days tend to be humid with generous cumulative amounts of rainfall reaching up to 162mm (6.38"). The city experiences daylight for an average of 13.3 hours with the majority of the time being sunny. Weather in January »Weather in February
As per the climate data of Saint-Louis, Reunion, February continues to uphold the summer vibes from the previous month. Notably, there is a slight reduction of rainfall down to 110mm (4.33"), making February moderately drier compared to January. Weather in February »Weather in March
In Saint-Louis, Reunion, March promises a slight change in weather compared to February. The month experiences a slight increase in rainfall, up from 110mm (4.33") to 119mm (4.69"), indicating that March ushers in more wet days. The high temperatures prevail, albeit, with a slight dip, making the days warm and the nights a bit cooler than the preceding month. Weather in March »Weather in April
The climate in Saint-Louis, Reunion, undergoes further change as April takes over from March. Significantly, there is a considerable reduction in rainfall, down to 84mm (3.31"), and this is a key characteristic of April's weather. Weather in April »Weather in May
Despite the year progressing, May in Saint-Louis, Reunion, carries forward the lower rainfall pattern from April, reducing further to 44mm (1.73"). The days start to get shorter with dimming sunlight hours, indicating the gradual transition towards the winter season. Weather in May »Weather in June
As per Saint-Louis, Reunion's weather data, June continues to follow May's descending temperature trend with weather turning relatively cooler. When it comes to rainfall, with only 21mm (0.83"), June exhibits the commencement of a notably drier season. Weather in June »Weather in July
Saint-Louis, Reunion experiences the coldest month of the year in July as high temperatures drop to 21.3°C (70.3°F). The rainfall reduces to 16mm (0.63"), which implies that July is the driest month of the year. Despite being the peak winter month, the region does not experience extreme cold, meaning daytime conditions remain suitable for outdoor exploration. Weather in July »Weather in August
According to Saint-Louis, Reunion's climate data, August showcases a minor upward shift in both rainfall and temperature, promising a slight transition from the cold climax of July. It is however still winter, with cooler conditions characteristic of most days and nights. Weather in August »Weather in September
Saint-Louis, Reunion greets September with a warmer embrace as compared to previous chill months. However, a key highlight of the month's weather is its low rainfall, only slightly above August's, at 10mm (0.39"). The humble rise in temperature gradually marks the onset of summer, replacing the winter blues with warmer hues. Weather in September »Weather in October
Entering the month of October, Saint-Louis, Reunion witnesses a considerable rise in temperature, setting the stage for the incoming summer. October differentiates itself with a threefold increase in rainfall from the previous month, clocking in at 34mm (1.34"). Weather in October »Weather in November
The weather in November in Saint-Louis, Reunion, presents an anticipation of brighter and warmer days as it is on the brink of the hottest time of the year. Another considerable elevation in rainfall surfaces in November, reaching 79mm (3.11"), indicating the start of the rainy season. Weather in November »Weather in December
December marks the arrival of summer in Saint-Louis, Reunion, bringing in the highest temperatures of the year. Interestingly, in contrast to November, December experiences a decrease in rainfall, bringing the figure down to 66mm (2.6"). Weather in December »Updated: Feb 5, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
During January through March, Saint-Louis experiences its average highest temperatures, peaking at 26.3°C (79.3°F).
The months with the highest humidity are January through April, with an average relative humidity of 81%.
The month with the most rainfall is January, when the rain falls for 23.7 days and typically aggregates up to 162mm (6.38") of precipitation.
Throughout the year, in Saint-Louis, there are 207.9 rainfall days, and 756mm (29.76") of precipitation is accumulated.
January, March through December, with an average maximum UV index of 6, are months with the lowest UV index.
February is the month with the highest UV index in Saint-Louis, with an average maximum UV index of 7.
With an average of 6.9h of sunshine, May has the least sunshine of the year.
The month with the shortest days is June, with an average of 10h and 54min of daylight.
July, known for its average high temperature of 21.3°C (70.3°F) and an average low temperature of 18.8°C (65.8°F), is the coldest month in Saint-Louis, Reunion.
The months with the lowest humidity in Saint-Louis are July through September, with an average relative humidity of 77%.
The month with the least rainfall is September, when the rain falls for 9.5 days and typically collects 10mm (0.39") of precipitation.
With an average of 10.9h of sunshine, October has the most sunshine of the year in Saint-Louis.
The month with the longest days is December, with an average of 13h and 24min of daylight.
Saint-Louis, Reunion, does not observe Daylight Saving Time (DST). +04 timezone is used throughout the entire year.
Average temperature
Saint-Louis, Reunion
The warmest months (with the highest average high temperature) are January, February and March (26.3°C).
The month with the lowest average high temperature is July (21.3°C).
The months with the highest average low temperature are January and February (24.3°C).
The coldest month (with the lowest average low temperature) is July (18.8°C).
Average pressure
Saint-Louis, Reunion
- Average pressure in January:
1011.3mbar - Average pressure in February:
1011.1mbar - Average pressure in March:
1012.4mbar - Average pressure in April:
1014.7mbar - Average pressure in May:
1017.5mbar - Average pressure in June:
1019.8mbar
- Average pressure in July:
1020.8mbar - Average pressure in August:
1021.5mbar - Average pressure in September:
1020.9mbar - Average pressure in October:
1018.2mbar - Average pressure in November:
1015.7mbar - Average pressure in December:
1013.4mbar
The month with the highest atmospheric pressure is August (1021.5mbar).
The month with the lowest atmospheric pressure is February (1011.1mbar).
Average wind speed
Saint-Louis, Reunion
- Average wind speed in January:
15.8km/h - Average wind speed in February:
15.6km/h - Average wind speed in March:
16.8km/h - Average wind speed in April:
16.7km/h - Average wind speed in May:
16.7km/h - Average wind speed in June:
19.1km/h
- Average wind speed in July:
19.8km/h - Average wind speed in August:
18.9km/h - Average wind speed in September:
18.2km/h - Average wind speed in October:
15.3km/h - Average wind speed in November:
13.4km/h - Average wind speed in December:
13.5km/h
The windiest month (with the highest average wind speed) is July (19.8km/h).
The calmest month (with the lowest average wind speed) is November (13.4km/h).
Average humidity
Saint-Louis, Reunion
The months with the highest relative humidity are January, February, March and April (81%).
The months with the lowest relative humidity are July, August and September (77%).
Average rainfall
Saint-Louis, Reunion
- Average rainfall in January:
162mm - Average rainfall in February:
110mm - Average rainfall in March:
119mm - Average rainfall in April:
84mm - Average rainfall in May:
44mm - Average rainfall in June:
21mm
The wettest month (with the highest rainfall) is January (162mm).
The driest month (with the least rainfall) is September (10mm).
Average rainfall days
Saint-Louis, Reunion
- Average rainfall days in January:
23.7 days - Average rainfall days in February:
23.4 days - Average rainfall days in March:
24.9 days - Average rainfall days in April:
19.8 days - Average rainfall days in May:
17.5 days - Average rainfall days in June:
13.9 days
- Average rainfall days in July:
12.8 days - Average rainfall days in August:
12.2 days - Average rainfall days in September:
9.5 days - Average rainfall days in October:
12.4 days - Average rainfall days in November:
16.6 days - Average rainfall days in December:
21.2 days
The month with the highest number of rainy days is March (24.9 days).
The month with the least rainy days is September (9.5 days).
Average daylight / Average sunshine
Saint-Louis, Reunion
- Average daylight in January:
13h and 18min - Average daylight in February:
12h and 48min - Average daylight in March:
12h and 12min - Average daylight in April:
11h and 36min - Average daylight in May:
11h and 6min - Average daylight in June:
10h and 54min
- Average daylight in July:
11h and 0min - Average daylight in August:
11h and 24min - Average daylight in September:
12h and 0min - Average daylight in October:
12h and 36min - Average daylight in November:
13h and 6min - Average daylight in December:
13h and 24min
The month with the longest days is December (Average daylight: 13h and 24min).
The month with the shortest days is June (Average daylight: 10h and 54min).
- Average sunshine in January:
10h and 6min - Average sunshine in February:
8h and 18min - Average sunshine in March:
8h and 18min - Average sunshine in April:
7h and 54min - Average sunshine in May:
6h and 54min - Average sunshine in June:
7h and 0min
- Average sunshine in July:
7h and 0min - Average sunshine in August:
8h and 54min - Average sunshine in September:
9h and 18min - Average sunshine in October:
10h and 54min - Average sunshine in November:
10h and 36min - Average sunshine in December:
10h and 36min
The month with the most sunshine is October (Average sunshine: 10h and 54min).
The month with the least sunshine is May (Average sunshine: 6h and 54min).
Average sunshine days
Saint-Louis, Reunion
- Average sunshine days in January:
2.9 days - Average sunshine days in February:
1.7 days - Average sunshine days in March:
2.5 days - Average sunshine days in April:
5.3 days - Average sunshine days in May:
7.5 days - Average sunshine days in June:
11.4 days
- Average sunshine days in July:
12.8 days - Average sunshine days in August:
13.5 days - Average sunshine days in September:
12.8 days - Average sunshine days in October:
11.5 days - Average sunshine days in November:
6.9 days - Average sunshine days in December:
3.5 days
The month with the most sunshine days is August (13.5 days).
The month with the least sunshine days is February (1.7 days).
Average UV index
Saint-Louis, Reunion
The month with the highest UV index is February (UV index 7).
The months with the lowest UV index are January, March, April, May, June, July, August, September, October, November and December (UV index 6).
Average cloud cover
Saint-Louis, Reunion
The month with the most cloud cover is February (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 21).
Average visibility
Saint-Louis, Reunion
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
