Climate - St. Louis (Senegal)

The climate of Saint-Louis is tropical arid, with a long, dry season from November to May, and a rainy season from June to October.
The city (also known as Ndar) is located in the northwest of Senegal, on the coast, and at the mouth of the Senegal River, beyond which lies Mauritania.
The old city is located on an island, in front of which there is a barrier island, called Langue de Barbarie.
To the northeast is the Djoudj National Bird Sanctuary. To the south-west is the Lompoul desert.
The length of the rainy period and the amount of rainfall varies according to the years, however, the region of Saint-Louis, where precipitation drops below 400 mm (15.5 in) per year, is the driest in the country.
During the day it is hot all year round, but from December to February the nights are quite cool and the humidity is quite low.

The average temperature of the coldest month (January) is of 24.1 °C (75.4 °F), that of the warmest month (October) is of 29.5 °C (85.1 °F). Here are the average temperatures.
Precipitation amounts to 325 millimeters (12.8 inches) per year: it is therefore scarce. It ranges from 0 mm (0 in) in the driest months (March, April, May, November) to 120 mm (4.7 in) in the wettest one (September). Here is the average precipitation.
The sea temperature ranges from 19.5 °C (19.5 °F) in February, March to 28.5 °C (28.5 °F) in September. Here are the average sea temperatures.
On average, there are around 3005 sunshine hours per year. Here are the average sunshine hours per day.

St. Louis - Weather by month

Based on the period 1991-2020
(January - February - March - April - May - June - July - August - September - October - November - December)

In January, the coldest month of the year, the average temperature is of 24.1 °C (75 °F), with a minimum of 16.8 °C (62.3 °F) and a maximum of 31.4 °C (88.6 °F).
On the coldest nights of the month, the temperature usually drops to around 13 °C (55 °F).
On the warmest days of the month, the temperature usually reaches around 37 °C (98.5 °F).
Precipitation amounts to only 5 mm (0.2 in), distributed over 1 days.
On average, there are 240 hours of sunshine per month, i.e. 8 hours per day.
The average humidity is 45%.
The average wind speed is 13 kph (8 kph).
The average sea temperature is of 20.5 °C (69 °F).

In February, the average temperature is of 25 °C (77 °F), with a minimum of 17.6 °C (63.8 °F) and a maximum of 32.4 °C (90.2 °F).
On the coldest nights of the month, the temperature usually drops to around 14 °C (57 °F).
On the warmest days of the month, the temperature usually reaches around 38.5 °C (101 °F).
Precipitation amounts to only 8 mm (0.3 in), distributed over 1 days.
On average, there are 235 hours of sunshine per month, i.e. 8.5 hours per day.
The average humidity is 49%.
The average wind speed is 14 kph (9 kph).
The average sea temperature is of 19.5 °C (67 °F).

In March, the average temperature is of 25.6 °C (78 °F), with a minimum of 18.3 °C (65 °F) and a maximum of 33 °C (91.3 °F).
On the coldest nights of the month, the temperature usually drops to around 15 °C (59 °F).
On the warmest days of the month, the temperature usually reaches around 40.5 °C (105.5 °F).
Precipitation amounts to only 0 mm (0 in), distributed over 0 days.
On average, there are 275 hours of sunshine per month, i.e. 9 hours per day.
The average humidity is 57%.
The average wind speed is 16 kph (10 kph).
The average sea temperature is of 19.5 °C (67 °F).

In April, the average temperature is of 25.1 °C (77 °F), with a minimum of 18.7 °C (65.7 °F) and a maximum of 31.5 °C (88.7 °F).
On the coldest nights of the month, the temperature usually drops to around 15.5 °C (60 °F).
On the warmest days of the month, the temperature usually reaches around 42 °C (107 °F).
Precipitation amounts to only 0 mm (0 in), distributed over 0 days.
On average, there are 285 hours of sunshine per month, i.e. 9.5 hours per day.
The average humidity is 66%.
The average wind speed is 17 kph (11 kph).
The average sea temperature is of 20 °C (67.5 °F).

In May, the average temperature is of 25.2 °C (77 °F), with a minimum of 20 °C (68.1 °F) and a maximum of 30.3 °C (86.5 °F).
On the coldest nights of the month, the temperature usually drops to around 17 °C (62.5 °F).
On the warmest days of the month, the temperature usually reaches around 40 °C (104 °F).
Precipitation amounts to only 0 mm (0 in), distributed over 0 days.
On average, there are 280 hours of sunshine per month, i.e. 9 hours per day.
The average humidity is 73%.
The average wind speed is 17 kph (10 kph).
The average sea temperature is of 21 °C (69.5 °F).

In June, the average temperature is of 26.7 °C (80 °F), with a minimum of 22.9 °C (73.2 °F) and a maximum of 30.6 °C (87 °F).
On the coldest nights of the month, the temperature usually drops to around 20 °C (67.5 °F).
On the warmest days of the month, the temperature usually reaches around 39 °C (102.5 °F).
Precipitation amounts to only 7 mm (0.3 in), distributed over 1 days.
On average, there are 220 hours of sunshine per month, i.e. 7.5 hours per day.
The average humidity is 79%.
The average wind speed is 14 kph (9 kph).
The average sea temperature is of 24 °C (75 °F).

In July, the average temperature is of 28.1 °C (83 °F), with a minimum of 24.7 °C (76.5 °F) and a maximum of 31.5 °C (88.6 °F).
On the coldest nights of the month, the temperature usually drops to around 21 °C (70 °F).
On the warmest days of the month, the temperature usually reaches around 37 °C (98.5 °F).
Precipitation amounts to 45 mm (1.8 in), distributed over 4 days.
On average, there are 245 hours of sunshine per month, i.e. 8 hours per day.
The average humidity is 79%.
The average wind speed is 14 kph (9 kph).
The average sea temperature is of 26.5 °C (79.5 °F).

In August, the average temperature is of 28.8 °C (84 °F), with a minimum of 25.3 °C (77.6 °F) and a maximum of 32.2 °C (90 °F).
On the coldest nights of the month, the temperature usually drops to around 21 °C (70 °F).
On the warmest days of the month, the temperature usually reaches around 36.5 °C (98 °F).
Precipitation amounts to 105 mm (4.1 in), distributed over 8 days.
On average, there are 250 hours of sunshine per month, i.e. 8 hours per day.
The average humidity is 81%.
The average wind speed is 12 kph (8 kph).
The average sea temperature is of 28 °C (82 °F).

In September, the average temperature is of 29.2 °C (84 °F), with a minimum of 25.3 °C (77.6 °F) and a maximum of 33 °C (91.4 °F).
On the coldest nights of the month, the temperature usually drops to around 20.5 °C (69 °F).
On the warmest days of the month, the temperature usually reaches around 38.5 °C (101 °F).
Precipitation amounts to 120 mm (4.7 in), distributed over 8 days.
On average, there are 230 hours of sunshine per month, i.e. 7.5 hours per day.
The average humidity is 81%.
The average wind speed is 11 kph (7 kph).
The average sea temperature is of 28.5 °C (83 °F).

In October, the warmest month of the year, the average temperature is of 29.5 °C (85 °F), with a minimum of 24.4 °C (75.9 °F) and a maximum of 34.7 °C (94.4 °F).
On the coldest nights of the month, the temperature usually drops to around 20 °C (68.5 °F).
On the warmest days of the month, the temperature usually reaches around 41 °C (106 °F).
Precipitation amounts to 30 mm (1.2 in), distributed over 2 days.
On average, there are 260 hours of sunshine per month, i.e. 8.5 hours per day.
The average humidity is 72%.
The average wind speed is 12 kph (7 kph).
The average sea temperature is of 28 °C (82 °F).

In November, the average temperature is of 27.8 °C (82 °F), with a minimum of 20.9 °C (69.7 °F) and a maximum of 34.6 °C (94.4 °F).
On the coldest nights of the month, the temperature usually drops to around 17 °C (62.5 °F).
On the warmest days of the month, the temperature usually reaches around 40 °C (104 °F).
Precipitation amounts to only 0 mm (0 in), distributed over 0 days.
On average, there are 245 hours of sunshine per month, i.e. 8 hours per day.
The average humidity is 56%.
The average wind speed is 11 kph (7 kph).
The average sea temperature is of 26 °C (78.5 °F).

In December, the average temperature is of 25.2 °C (77 °F), with a minimum of 18.1 °C (64.5 °F) and a maximum of 32.3 °C (90.2 °F).
On the coldest nights of the month, the temperature usually drops to around 14 °C (57 °F).
On the warmest days of the month, the temperature usually reaches around 38 °C (100.5 °F).
Precipitation amounts to 10 mm (0.4 in), distributed over 1 days.
On average, there are 230 hours of sunshine per month, i.e. 7.5 hours per day.
The average humidity is 49%.
The average wind speed is 12 kph (7 kph).
The average sea temperature is of 23 °C (74 °F).