Climate - Saint Denis (Reunion)

The climate of Saint-Denis is tropical, with a hot, rainy period from December to April and a relatively cool, dry period from June to October. In the latter, the south-east trade winds blow, and some short showers can form. The sun shines for a good number of hours all year round.
The city is the capital of the island of Réunion and is located on the north coast.

Saint Denis - Climate data

In Saint Denis, the average temperature of the coldest month (July) is of 21.8 °C (71.3 °F), that of the warmest month (February) is of 27.1 °C (80.7 °F). Here are the average temperatures.
In Saint Denis, precipitation amounts to 1660 millimeters (65.4 inches) per year: it is therefore abundant. It ranges from 45 mm (1.8 in) in the driest month (October) to 350 mm (13.8 in) in the wettest one (February). Here is the average precipitation.
At Saint Denis, the sea temperature ranges from 24 °C (75 °F) in August, September to 28.5 °C (83 °F) in February, March. Here are the average sea temperatures.
In Saint Denis, there are on average around 2560 sunshine hours per year. Here are the average hours of sunshine per day.

Saint Denis - Weather by month

Based on the period 1991-2020

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In January, the weather in Saint Denis is usually warm to hot and muggy. The average temperature is of 26.9 °C (80 °F), with a minimum of 23.6 °C (74.5 °F) and a maximum of 30.2 °C (86.3 °F).
On the coldest nights of the month, the temperature usually drops to around 21.5 °C (70.5 °F). However, it dropped to 19.1 °C (66.4 °F) in January 2002.
On the warmest days of the month, the temperature usually reaches around 32 °C (90 °F). However, it reached 33.3 °C (91.9 °F) in January 1994.
Precipitation amounts to 280 mm (11 in), distributed over 13 days.
The day lasts on average 13 hours and 10 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 53% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is 20 kph (12 mph).
The average sea temperature is of 28 °C (82.5 °F). Therefore, the sea is pleasantly warm and allows long swims.

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In February, the hottest month of the year, the weather in Saint Denis is usually warm to hot and muggy. The average temperature is of 27.1 °C (81 °F), with a minimum of 23.8 °C (74.8 °F) and a maximum of 30.3 °C (86.6 °F).
On the coldest nights of the month, the temperature usually drops to around 21.5 °C (70.5 °F). However, it dropped to 19.9 °C (67.8 °F) in February 2000.
On the warmest days of the month, the temperature usually reaches around 32 °C (90 °F). However, it reached 34 °C (93.2 °F) in February 1995.
Precipitation amounts to 350 mm (13.8 in), distributed over 14 days.
The day lasts on average 12 hours and 50 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is 19 kph (12 mph).
The average sea temperature is of 28.5 °C (83 °F). Therefore, the sea is pleasantly warm and allows long swims.

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In March, the weather in Saint Denis is usually warm to hot and muggy. The average temperature is of 26.6 °C (80 °F), with a minimum of 23.3 °C (73.9 °F) and a maximum of 30 °C (85.9 °F).
On the coldest nights, the temperature usually drops to around 20.5 °C (69 °F). However, it dropped to 18.5 °C (65.3 °F) in March 2015.
On the warmest days, the temperature usually reaches around 31.5 °C (89 °F). However, it reached 33.1 °C (91.6 °F) in March 2002.
Precipitation amounts to 235 mm (9.3 in), distributed over 13 days.
The day lasts on average 12 hours and 10 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 57% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is 20 kph (12 mph).
The average sea temperature is of 28.5 °C (83 °F). Therefore, the sea is pleasantly warm and allows long swims.

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In April, the weather in Saint Denis is usually warm to hot and muggy. The average temperature is of 25.8 °C (78 °F), with a minimum of 22.3 °C (72.1 °F) and a maximum of 29.2 °C (84.6 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 19.5 °C (67 °F). However, it dropped to 17.5 °C (63.5 °F) in April 1992.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 31 °C (87.5 °F). However, it reached 32.7 °C (90.9 °F) in April 2018.
Precipitation amounts to 155 mm (6.1 in), distributed over 11 days.
The day lasts on average 11 hours and 35 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 63% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is 20 kph (12 mph).
The average sea temperature is of 28 °C (82 °F). Therefore, the sea is pleasantly warm and allows long swims.

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In May, the weather in Saint Denis is usually warm to hot and muggy. The average temperature is of 24.2 °C (76 °F), with a minimum of 20.7 °C (69.3 °F) and a maximum of 27.7 °C (81.8 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 17.5 °C (63.5 °F). However, it dropped to 15.3 °C (59.5 °F) in May 2016.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 29.5 °C (85 °F). However, it reached 30.6 °C (87.1 °F) in May 2016.
Precipitation amounts to 95 mm (3.7 in), distributed over 10 days.
The day lasts on average 11 hours and 5 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 62% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is 19 kph (12 mph).
The average sea temperature is of 26.5 °C (80 °F). Therefore, the sea is pleasantly warm and allows long swims.

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In June, the weather in Saint Denis is usually warm to hot. The average temperature is of 22.6 °C (73 °F), with a minimum of 19.1 °C (66.4 °F) and a maximum of 26.2 °C (79.1 °F).
On the coldest nights, the temperature usually drops to around 16 °C (61 °F). However, it dropped to 14.5 °C (58.1 °F) in June 2020.
On the warmest days, the temperature usually reaches around 28 °C (82.5 °F). However, it reached 29.8 °C (85.6 °F) in June 1992.
Precipitation amounts to 75 mm (3 in), distributed over 7 days.
The day lasts on average 10 hours and 55 minutes. June 21, the winter solstice, is the shortest day of the year in the Southern Hemisphere.
There are on average 7 hours of sunshine per day. So, the sun shines 66% of the time.
The average humidity is 69%.
The average wind speed is 21 kph (13 mph).
The average sea temperature is of 25.5 °C (78 °F). Therefore, the sea is warm enough for swimming.

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In July, the coolest month of the year, the weather in Saint Denis is usually warm. The average temperature is of 21.8 °C (71 °F), with a minimum of 18.3 °C (64.9 °F) and a maximum of 25.4 °C (77.7 °F).
On the coldest nights of the month, the temperature usually drops to around 15.5 °C (59.5 °F). However, it dropped to 13.1 °C (55.6 °F) in July 1991.
On the warmest days of the month, the temperature usually reaches around 27.5 °C (81 °F). However, it reached 29.4 °C (84.9 °F) in July 2008.
Precipitation amounts to 60 mm (2.4 in), distributed over 9 days.
The day lasts on average 11 hours and 0 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 65% of the time.
The average humidity is 69%.
The average wind speed is 23 kph (14 mph).
The average sea temperature is of 24.5 °C (76 °F). Therefore, the sea is warm enough for swimming.

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In August, the weather in Saint Denis is usually warm. The average temperature is of 21.8 °C (71 °F), with a minimum of 18.2 °C (64.8 °F) and a maximum of 25.5 °C (77.9 °F).
On the coldest nights of the month, the temperature usually drops to around 15.5 °C (59.5 °F). However, it dropped to 12.8 °C (55 °F) in August 1991.
On the warmest days of the month, the temperature usually reaches around 27.5 °C (81 °F). However, it reached 29.2 °C (84.6 °F) in August 1996.
Precipitation amounts to 60 mm (2.4 in), distributed over 10 days.
The day lasts on average 11 hours and 25 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 60% of the time.
The average humidity is 68%.
The average wind speed is 23 kph (14 mph).
The average sea temperature is of 24 °C (75 °F). Therefore, the sea is warm enough for swimming.

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In September, the weather in Saint Denis is usually warm. The average temperature is of 22.4 °C (72 °F), with a minimum of 18.7 °C (65.7 °F) and a maximum of 26 °C (78.8 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 16 °C (60.5 °F). However, it dropped to 13.8 °C (56.8 °F) in September 1993.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 28 °C (82 °F). However, it reached 33 °C (91.4 °F) in September 1992.
Precipitation amounts to 50 mm (2 in), distributed over 8 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 58% of the time.
The average humidity is 68%.
The average wind speed is 22 kph (14 mph).
The average sea temperature is of 24 °C (75 °F). Therefore, the sea is warm enough for swimming.

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In October, the weather in Saint Denis is usually warm to hot. The average temperature is of 22.9 °C (73 °F), with a minimum of 18.7 °C (65.7 °F) and a maximum of 27 °C (80.6 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 17 °C (63 °F). However, it dropped to 13.4 °C (56.1 °F) in October 2006.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 29 °C (84 °F). However, it reached 30.5 °C (86.9 °F) in October 1991.
Precipitation amounts to 45 mm (1.8 in), distributed over 7 days.
The day lasts on average 12 hours and 35 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 69%.
The average wind speed is 22 kph (13 mph).
The average sea temperature is of 24.5 °C (76.5 °F). Therefore, the sea is warm enough for swimming.

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In November, the weather in Saint Denis is usually warm to hot and muggy. The average temperature is of 24.1 °C (75 °F), with a minimum of 19.9 °C (67.8 °F) and a maximum of 28.3 °C (82.9 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 18 °C (65 °F). However, it dropped to 15.6 °C (60.1 °F) in November 2007.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 30.5 °C (86.5 °F). However, it reached 31.8 °C (89.2 °F) in November 2014.
Precipitation amounts to 70 mm (2.8 in), distributed over 6 days.
The day lasts on average 13 hours and 5 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 70%. Hence, the air is normally humid.
The average wind speed is 20 kph (12 mph).
The average sea temperature is of 26 °C (78.5 °F). Therefore, the sea is warm enough for swimming.

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In December, the weather in Saint Denis is usually warm to hot and muggy. The average temperature is of 25.3 °C (78 °F), with a minimum of 21.1 °C (70 °F) and a maximum of 29.5 °C (85.1 °F).
On the coldest nights of the month, the temperature usually drops to around 20 °C (68.5 °F). However, it dropped to 18 °C (64.4 °F) in December 2020.
On the warmest days of the month, the temperature usually reaches around 31.5 °C (88.5 °F). However, it reached 34.5 °C (94.1 °F) in December 2019.
Precipitation amounts to 190 mm (7.5 in), distributed over 11 days.
The day lasts on average 13 hours and 25 minutes. December 21, the summer solstice, is the longest day of the year in the Southern Hemisphere.
There are on average 7 hours of sunshine per day. So, the sun shines 53% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is 19 kph (12 mph).
The average sea temperature is of 27 °C (81 °F). Therefore, the sea is pleasantly warm and allows long swims.