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Climate - St. Louis (Senegal)


Average weather, temperature, rainfall, sunshine hours

Flag - Senegal

St Louis, where it is located


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Climate chart - St. Louis (Senegal)
Climate chart - 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.

St. Louis - Climate data


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.
St. Louis - Average temperatures (1991-2020)
MonthMin (°C)Max (°C)Mean (°C)Min (°F)Max (°F)Mean (°F)
January16.831.424.1628975.4
February17.632.425649077
March18.33325.6659178.2
April18.731.525.1668977.2
May2030.325.2688777.3
June22.930.626.7738780.1
July24.731.528.1768982.6
August25.332.228.8789083.8
September25.33329.2789184.5
October24.434.729.5769485.1
November20.934.627.8709482
December18.132.325.2659077.4
Year21.132.326.657090.180

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.
St. Louis - Average precipitation
MonthMillimetersInchesDays
January50.21
February80.31
March000
April000
May000
June70.31
July451.84
August1054.18
September1204.78
October301.22
November000
December100.41
Year32512.827

The sea temperature ranges from 19.5 °C (67 °F) in February, March to 28.5 °C (83 °F) in September. Here are the average sea temperatures.
St. Louis - Sea temperature
MonthCelsius (°C)Fahrenheit (°F)
January20.569
February19.567
March19.567
April2068
May2170
June2475
July26.580
August2882
September28.583
October2882
November2679
December2374
Year23.774.6

There are on average around 3005 sunshine hours per year. Here are the average hours of sunshine per day.
St. Louis - Sunshine hours
MonthAverageTotal
January8240
February8.5240
March9275
April9.5285
May9280
June7.5220
July8245
August8250
September7.5230
October8.5260
November8245
December7.5230
Year8.23005

St. Louis - Weather by month

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


January, the coolest month of the year, is generally a warm to hot month. However, there are remarkable differences between night and day. 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).
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 13 °C (55 °F).
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 37 °C (98.5 °F).
Rain iconPrecipitation amounts to only 5 mm (0.2 in), and all occurs in one day.
The day lasts on average 11 hours and 20 minutes.
Sun iconThere are on average 8 hours of sunshine per day. So, the sun shines 69% of the time.
The average humidity is 45%.
The average wind speed is 13 kph (8 mph).
Sea iconThe average sea temperature is of 20.5 °C (69 °F). Therefore, the sea is cool for swimming.



February is generally a warm to hot month. However, there are remarkable differences between night and day. 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).
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 14 °C (57 °F).
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 38.5 °C (101 °F).
Rain iconPrecipitation amounts to only 8 mm (0.3 in), and all occurs in one day.
The day lasts on average 11 hours and 35 minutes.
Sun iconThere are on average 8.5 hours of sunshine per day. So, the sun shines 73% of the time.
The average humidity is 49%.
The average wind speed is 14 kph (9 mph).
Sea iconThe average sea temperature is of 19.5 °C (67 °F). Therefore, the sea is very cool for swimming.



March is generally a warm to hot month. However, there are remarkable differences between night and day. 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).
Cold thermometer iconOn the coldest nights, the temperature usually drops to around 15 °C (59 °F).
Warm thermometer iconOn the warmest days, the temperature usually reaches around 40.5 °C (105.5 °F).
Rain iconPrecipitation amounts to only 0 mm (0 in), so on average it never rains in the whole month.
The day lasts on average 12 hours and 5 minutes.
Sun iconThere are on average 9 hours of sunshine per day. So, the sun shines 74% of the time.
The average humidity is 57%.
The average wind speed is 16 kph (10 mph).
Sea iconThe average sea temperature is of 19.5 °C (67 °F). Therefore, the sea is very cool for swimming.



April is generally a warm to hot month. 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).
Cold thermometer iconOn the coldest nights, the temperature usually drops to around 15.5 °C (60 °F).
Warm thermometer iconOn the warmest days, the temperature usually reaches around 42 °C (107 °F).
Rain iconPrecipitation amounts to only 0 mm (0 in), so on average it never rains in the whole month.
The day lasts on average 12 hours and 30 minutes.
Sun iconThere are on average 9.5 hours of sunshine per day. So, the sun shines 76% of the time.
The average humidity is 66%.
The average wind speed is 17 kph (11 mph).
Sea iconThe average sea temperature is of 20 °C (67.5 °F). Therefore, the sea is very cool for swimming.



May is generally a warm to hot, muggy month. 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).
Cold thermometer iconOn the coldest nights, the temperature usually drops to around 17 °C (62.5 °F).
Warm thermometer iconOn the warmest days, the temperature usually reaches around 40 °C (104 °F).
Rain iconPrecipitation amounts to only 0 mm (0 in), so on average it never rains in the whole month.
The day lasts on average 12 hours and 55 minutes.
Sun iconThere are on average 9 hours of sunshine per day. So, the sun shines 70% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is 17 kph (10 mph).
Sea iconThe average sea temperature is of 21 °C (69.5 °F). Therefore, the sea is cool for swimming.



June is generally a warm to hot, muggy month. 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).
Cold thermometer iconOn the coldest nights, the temperature usually drops to around 20 °C (67.5 °F).
Warm thermometer iconOn the warmest days, the temperature usually reaches around 39 °C (102.5 °F).
Rain iconPrecipitation amounts to only 7 mm (0.3 in), and all occurs in one day.
The day lasts on average 13 hours and 5 minutes. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
Sun iconThere are on average 7.5 hours of sunshine per day. So, the sun shines 57% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is 14 kph (9 mph).
Sea iconThe average sea temperature is of 24 °C (75 °F). Therefore, the sea is warm enough for swimming.



July is generally a very hot, muggy month. 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).
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 21 °C (70 °F).
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 37 °C (98.5 °F).
Rain iconPrecipitation amounts to 45 mm (1.8 in), distributed over 4 days.
The day lasts on average 13 hours and 0 minutes.
Sun iconThere are on average 8 hours of sunshine per day. So, the sun shines 61% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is 14 kph (9 mph).
Sea iconThe average sea temperature is of 26.5 °C (79.5 °F). Therefore, the sea is pleasantly warm and allows long swims.



August is generally a very hot, muggy month. 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).
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 21 °C (70 °F).
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 36.5 °C (98 °F).
Rain iconPrecipitation amounts to 105 mm (4.1 in), distributed over 8 days.
The day lasts on average 12 hours and 35 minutes.
Sun iconThere are on average 8 hours of sunshine per day. So, the sun shines 64% of the time.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is 12 kph (8 mph).
Sea iconThe average sea temperature is of 28 °C (82 °F). Therefore, the sea is pleasantly warm and allows long swims.



September is generally a very hot, muggy month. 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).
Cold thermometer iconOn the coldest nights, the temperature usually drops to around 20.5 °C (69 °F).
Warm thermometer iconOn the warmest days, the temperature usually reaches around 38.5 °C (101 °F).
Rain iconPrecipitation amounts to 120 mm (4.7 in), distributed over 8 days.
The day lasts on average 12 hours and 10 minutes.
Sun iconThere are on average 7.5 hours of sunshine per day. So, the sun shines 62% of the time.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
Sea iconThe average sea temperature is of 28.5 °C (83 °F). Therefore, the sea is pleasantly warm and allows long swims.



October, the hottest month of the year, is generally a very hot, muggy month. 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).
Cold thermometer iconOn the coldest nights, the temperature usually drops to around 20 °C (68.5 °F).
Warm thermometer iconOn the warmest days, the temperature usually reaches around 41 °C (106 °F).
Rain iconPrecipitation amounts to 30 mm (1.2 in), distributed over 2 days.
The day lasts on average 11 hours and 50 minutes.
Sun iconThere are on average 8.5 hours of sunshine per day. So, the sun shines 71% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is 12 kph (7 mph).
Sea iconThe average sea temperature is of 28 °C (82 °F). Therefore, the sea is pleasantly warm and allows long swims.



November is generally a very hot month. However, there are remarkable differences between night and day. 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).
Cold thermometer iconOn the coldest nights, the temperature usually drops to around 17 °C (62.5 °F).
Warm thermometer iconOn the warmest days, the temperature usually reaches around 40 °C (104 °F).
Rain iconPrecipitation amounts to only 0 mm (0 in), so on average it never rains in the whole month.
The day lasts on average 11 hours and 25 minutes.
Sun iconThere are on average 8 hours of sunshine per day. So, the sun shines 72% of the time.
The average humidity is 56%.
The average wind speed is 11 kph (7 mph).
Sea iconThe average sea temperature is of 26 °C (78.5 °F). Therefore, the sea is warm enough for swimming.



December is generally a warm to hot month. However, there are remarkable differences between night and day. 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).
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 14 °C (57 °F).
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 38 °C (100.5 °F).
Rain iconPrecipitation amounts to 10 mm (0.4 in), and all occurs in one day.
The day lasts on average 11 hours and 10 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
Sun iconThere are on average 7.5 hours of sunshine per day. So, the sun shines 67% of the time.
The average humidity is 49%.
The average wind speed is 12 kph (7 mph).
Sea iconThe average sea temperature is of 23 °C (74 °F). Therefore, the sea can be considered barely acceptable for swimming.

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