Saint-Louis weather in August
In August, Saint-Louis sees average daytime highs of 29°C and overnight lows near 26°C, with 57 mm of rain across 7.8 wet days and about 12.5 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.
Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 31% of the time in August, and the air most often feels miserable.
Daylight stretches from about 12 h 42 min at the start of August to 12 h 18 min by month's end. Set against the rest of the year, August is Saint-Louis's 12th-clearest and 11th-windiest month. For the whole year in context, see Saint-Louis's year-round climate.
- Daytime high
- 29°
- 4th warmest
- Overnight low
- 26°
- 11th coldest
- Rainfall
- 57 mm
- 7.8 wet days
- Daylight
- 12 h 30 min
- 6:54 AM – 7:26 PM
- Cloud cover
- 58%
- 12th clearest
- Wind
- 17 km/h
- 11th windiest
- Solar energy
- 5.99 kWh/m²
- Travel score
- 5.9
- out of 10
Saint-Louis is city and regional capital in Senegal.
- Founded
- 1659
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in August
Day-to-day highs hold fairly steady near 29°C through the month.
A typical August day in Saint-Louis reaches about 29°C in the afternoon and slips back to 26°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 30°C. Set against its neighbours, August runs about 1°C warmer than July and about 1°C cooler than September.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Avg low (°C) | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 28 | 26 |
| 2 | 28 | 26 |
| 3 | 29 | 26 |
| 4 | 29 | 26 |
| 5 | 29 | 26 |
| 6 | 29 | 26 |
| 7 | 29 | 26 |
| 8 | 29 | 26 |
| 9 | 29 | 26 |
| 10 | 29 | 26 |
| 11 | 29 | 26 |
| 12 | 29 | 26 |
| 13 | 29 | 26 |
| 14 | 29 | 26 |
| 15 | 29 | 26 |
| 16 | 29 | 26 |
| 17 | 29 | 26 |
| 18 | 29 | 26 |
| 19 | 29 | 26 |
| 20 | 29 | 26 |
| 21 | 29 | 26 |
| 22 | 29 | 26 |
| 23 | 29 | 26 |
| 24 | 29 | 26 |
| 25 | 29 | 26 |
| 26 | 29 | 26 |
| 27 | 29 | 26 |
| 28 | 29 | 26 |
| 29 | 29 | 26 |
| 30 | 29 | 26 |
| 31 | 29 | 26 |
How August really feels in Saint-Louis
Once humidity and wind are folded in, August averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Saint-Louis weather by month
How August compares with the rest of the year at a glance. August is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 25° / 19° | 3 | 0.2 | 11.2 | 8.7 |
| Feb | 25° / 19° | 1 | 0.2 | 11.5 | 8.8 |
| Mar | 25° / 20° | 0 | 0 | 11.9 | 9.1 |
| Apr | 25° / 20° | 0 | 0 | 12.3 | 9.2 |
| May | 25° / 21° | 0 | 0 | 12.7 | 9.1 |
| Jun | 27° / 23° | 1 | 0.3 | 12.9 | 8.7 |
| Jul | 28° / 25° | 11 | 2 | 12.9 | 7.6 |
| Aug | 29° / 26° | 57 | 7.8 | 12.5 | 5.9 |
| Sep | 30° / 27° | 52 | 7.2 | 12.1 | 5.6 |
| Oct | 30° / 26° | 13 | 2.1 | 11.6 | 6.1 |
| Nov | 29° / 24° | 0 | 0.1 | 11.3 | 6.8 |
| Dec | 27° / 21° | 2 | 0.3 | 11.1 | 8.2 |
Cloud cover in August
The sky is clear or mostly clear about 31% of the time in August, the cloudiest month of the year.
Beyond those clear spells, partly cloudy skies cover about 22% of August, with mostly cloudy or overcast conditions the remaining 47%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 65 | 64 | 63 | 63 | 61 | 61 | 60 | 59 | 58 | 57 | 56 | 54 | 53 | 52 | 51 | 49 | 49 | 48 | 47 | 46 | 46 | 46 | 46 | 46 | 46 | 47 | 46 | 46 | 46 | 46 | 47 |
| Cloudier (%) | 35 | 36 | 37 | 37 | 39 | 39 | 40 | 41 | 42 | 43 | 44 | 46 | 47 | 48 | 49 | 51 | 51 | 52 | 53 | 54 | 54 | 54 | 54 | 54 | 54 | 53 | 54 | 54 | 54 | 54 | 53 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 65 | 35 |
| 2 | 64 | 36 |
| 3 | 63 | 37 |
| 4 | 63 | 37 |
| 5 | 61 | 39 |
| 6 | 61 | 39 |
| 7 | 60 | 40 |
| 8 | 59 | 41 |
| 9 | 58 | 42 |
| 10 | 57 | 43 |
| 11 | 56 | 44 |
| 12 | 54 | 46 |
| 13 | 53 | 47 |
| 14 | 52 | 48 |
| 15 | 51 | 49 |
| 16 | 49 | 51 |
| 17 | 49 | 51 |
| 18 | 48 | 52 |
| 19 | 47 | 53 |
| 20 | 46 | 54 |
| 21 | 46 | 54 |
| 22 | 46 | 54 |
| 23 | 46 | 54 |
| 24 | 46 | 54 |
| 25 | 46 | 54 |
| 26 | 47 | 53 |
| 27 | 46 | 54 |
| 28 | 46 | 54 |
| 29 | 46 | 54 |
| 30 | 46 | 54 |
| 31 | 47 | 53 |
Chance of precipitation in August
Saint-Louis gets around 57 mm of rain over 7.8 wet days in August, the wettest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 25% and peaks near 32% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 15 | 16 | 17 | 18 | 18 | 19 | 20 | 20 | 21 | 22 | 22 | 23 | 24 | 25 | 25 | 26 | 27 | 27 | 28 | 28 | 29 | 29 | 29 | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 32 |
| Rain chance (%) | |
|---|---|
| 1 | 15 |
| 2 | 16 |
| 3 | 17 |
| 4 | 18 |
| 5 | 18 |
| 6 | 19 |
| 7 | 20 |
| 8 | 20 |
| 9 | 21 |
| 10 | 22 |
| 11 | 22 |
| 12 | 23 |
| 13 | 24 |
| 14 | 25 |
| 15 | 25 |
| 16 | 26 |
| 17 | 27 |
| 18 | 27 |
| 19 | 28 |
| 20 | 28 |
| 21 | 29 |
| 22 | 29 |
| 23 | 29 |
| 24 | 30 |
| 25 | 30 |
| 26 | 30 |
| 27 | 31 |
| 28 | 31 |
| 29 | 31 |
| 30 | 31 |
| 31 | 32 |
Humidity in August
Most of August feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the miserable band about 55% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Muggy (%) | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Oppressive (%) | 62 | 61 | 61 | 59 | 58 | 57 | 57 | 56 | 55 | 54 | 53 | 51 | 50 | 48 | 46 | 45 | 43 | 41 | 39 | 38 | 36 | 35 | 33 | 32 | 30 | 29 | 28 | 26 | 25 | 24 | 23 |
| Miserable (%) | 35 | 36 | 37 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 48 | 50 | 51 | 53 | 54 | 56 | 59 | 61 | 62 | 64 | 65 | 67 | 68 | 70 | 71 | 72 | 74 | 75 | 76 | 77 |
| Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|
| 1 | 3 | 62 | 35 |
| 2 | 3 | 61 | 36 |
| 3 | 2 | 61 | 37 |
| 4 | 2 | 59 | 39 |
| 5 | 2 | 58 | 40 |
| 6 | 2 | 57 | 41 |
| 7 | 1 | 57 | 42 |
| 8 | 1 | 56 | 43 |
| 9 | 1 | 55 | 44 |
| 10 | 1 | 54 | 45 |
| 11 | 1 | 53 | 46 |
| 12 | 1 | 51 | 48 |
| 13 | 1 | 50 | 50 |
| 14 | 1 | 48 | 51 |
| 15 | 1 | 46 | 53 |
| 16 | 1 | 45 | 54 |
| 17 | 1 | 43 | 56 |
| 18 | 0 | 41 | 59 |
| 19 | 0 | 39 | 61 |
| 20 | 0 | 38 | 62 |
| 21 | 0 | 36 | 64 |
| 22 | 0 | 35 | 65 |
| 23 | 0 | 33 | 67 |
| 24 | 0 | 32 | 68 |
| 25 | 0 | 30 | 70 |
| 26 | 0 | 29 | 71 |
| 27 | 0 | 28 | 72 |
| 28 | 0 | 26 | 74 |
| 29 | 0 | 25 | 75 |
| 30 | 0 | 24 | 76 |
| 31 | 0 | 23 | 77 |
Wind in August
Winds average 17 km/h in August.
Across August, daily wind ranges from about 16 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 18 | light breeze |
| 2 | 18 | light breeze |
| 3 | 18 | light breeze |
| 4 | 18 | light breeze |
| 5 | 18 | light breeze |
| 6 | 18 | light breeze |
| 7 | 18 | light breeze |
| 8 | 18 | light breeze |
| 9 | 18 | light breeze |
| 10 | 18 | light breeze |
| 11 | 18 | light breeze |
| 12 | 17 | light breeze |
| 13 | 17 | light breeze |
| 14 | 17 | light breeze |
| 15 | 17 | light breeze |
| 16 | 17 | light breeze |
| 17 | 17 | light breeze |
| 18 | 17 | light breeze |
| 19 | 17 | light breeze |
| 20 | 17 | light breeze |
| 21 | 17 | light breeze |
| 22 | 17 | light breeze |
| 23 | 17 | light breeze |
| 24 | 16 | light breeze |
| 25 | 16 | light breeze |
| 26 | 16 | light breeze |
| 27 | 16 | light breeze |
| 28 | 16 | light breeze |
| 29 | 16 | light breeze |
| 30 | 16 | light breeze |
| 31 | 16 | light breeze |
Sunrise & sunset in August
Daylight runs from about 12 h 42 min at the start of August to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 24 minutes over August. Sunrise moves from 6:50 AM to 6:56 AM, and sunset from 7:34 PM to 7:16 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.3 | 12.3 |
| Sunrise (AM) | 6:50 | 6:51 | 6:51 | 6:51 | 6:51 | 6:52 | 6:52 | 6:52 | 6:52 | 6:53 | 6:53 | 6:53 | 6:53 | 6:53 | 6:54 | 6:54 | 6:54 | 6:54 | 6:54 | 6:55 | 6:55 | 6:55 | 6:55 | 6:55 | 6:55 | 6:55 | 6:56 | 6:56 | 6:56 | 6:56 | 6:56 |
| Sunset (PM) | 7:34 | 7:33 | 7:33 | 7:33 | 7:32 | 7:32 | 7:31 | 7:31 | 7:30 | 7:30 | 7:29 | 7:29 | 7:28 | 7:27 | 7:27 | 7:26 | 7:26 | 7:25 | 7:24 | 7:24 | 7:23 | 7:22 | 7:22 | 7:21 | 7:20 | 7:20 | 7:19 | 7:18 | 7:17 | 7:17 | 7:16 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.7 | 6:50 | 7:34 |
| 2 | 12.7 | 6:51 | 7:33 |
| 3 | 12.7 | 6:51 | 7:33 |
| 4 | 12.7 | 6:51 | 7:33 |
| 5 | 12.7 | 6:51 | 7:32 |
| 6 | 12.7 | 6:52 | 7:32 |
| 7 | 12.7 | 6:52 | 7:31 |
| 8 | 12.6 | 6:52 | 7:31 |
| 9 | 12.6 | 6:52 | 7:30 |
| 10 | 12.6 | 6:53 | 7:30 |
| 11 | 12.6 | 6:53 | 7:29 |
| 12 | 12.6 | 6:53 | 7:29 |
| 13 | 12.6 | 6:53 | 7:28 |
| 14 | 12.6 | 6:53 | 7:27 |
| 15 | 12.6 | 6:54 | 7:27 |
| 16 | 12.5 | 6:54 | 7:26 |
| 17 | 12.5 | 6:54 | 7:26 |
| 18 | 12.5 | 6:54 | 7:25 |
| 19 | 12.5 | 6:54 | 7:24 |
| 20 | 12.5 | 6:55 | 7:24 |
| 21 | 12.5 | 6:55 | 7:23 |
| 22 | 12.5 | 6:55 | 7:22 |
| 23 | 12.4 | 6:55 | 7:22 |
| 24 | 12.4 | 6:55 | 7:21 |
| 25 | 12.4 | 6:55 | 7:20 |
| 26 | 12.4 | 6:55 | 7:20 |
| 27 | 12.4 | 6:56 | 7:19 |
| 28 | 12.4 | 6:56 | 7:18 |
| 29 | 12.4 | 6:56 | 7:17 |
| 30 | 12.3 | 6:56 | 7:17 |
| 31 | 12.3 | 6:56 | 7:16 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 5.99 kWh/m².
For context, solar energy here swings from a low near 5 kWh/m² to a high of 7.37 kWh/m² in May across the year — August's 5.99 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.3 | 6.3 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.8 | 5.8 | 5.9 | 5.9 | 5.9 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.3 | Intense |
| 2 | 6.3 | Intense |
| 3 | 6.2 | Intense |
| 4 | 6.2 | Intense |
| 5 | 6.2 | Intense |
| 6 | 6.2 | Intense |
| 7 | 6.2 | Intense |
| 8 | 6.1 | Intense |
| 9 | 6.1 | Intense |
| 10 | 6.1 | Intense |
| 11 | 6.1 | Intense |
| 12 | 6.1 | Intense |
| 13 | 6.0 | Intense |
| 14 | 6.0 | Intense |
| 15 | 6.0 | Intense |
| 16 | 6.0 | Bright |
| 17 | 6.0 | Bright |
| 18 | 5.9 | Bright |
| 19 | 5.9 | Bright |
| 20 | 5.9 | Bright |
| 21 | 5.9 | Bright |
| 22 | 5.9 | Bright |
| 23 | 5.9 | Bright |
| 24 | 5.9 | Bright |
| 25 | 5.9 | Bright |
| 26 | 5.9 | Bright |
| 27 | 5.8 | Bright |
| 28 | 5.8 | Bright |
| 29 | 5.9 | Bright |
| 30 | 5.9 | Bright |
| 31 | 5.9 | Bright |
Hazard calendar for Saint-Louis
In August, Saint-Louis sits inside its atlantic hurricane and dust season. The full year is below, with each hazard's peak months called out.
Saint-Louis sits in the Atlantic hurricane belt; the season peaks August–October.
Saint-Louis sees dust haze year-round, heaviest in June.
Is August a good time to visit Saint-Louis?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is a reasonable time to visit Saint-Louis for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Saint-Louis in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Saint-Louis sees daytime highs around 29°C and nights near 26°C. Pack light clothes. Worth having: sun protection. About 8 days see rain.
Sea temperature near Saint-Louis in August
The nearest coast averages about 28°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 19 km away) is warmest in September at about 28°C and coldest in February near 19°C.
It's comfortable for a long swim from May 3 to Jan 11 — about 8.4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 20 | 19 | 19 | 19 | 21 | 24 | 26 | 28 | 28 | 28 | 25 | 22 |
| Comfort | Cool | Cool | Cool | Cool | Refreshing | Refreshing | Warm | Warm | Tropical | Warm | Warm | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 20 | Cool |
| Feb | 19 | Cool |
| Mar | 19 | Cool |
| Apr | 19 | Cool |
| May | 21 | Refreshing |
| Jun | 24 | Refreshing |
| Jul | 26 | Warm |
| Aug | 28 | Warm |
| Sep | 28 | Tropical |
| Oct | 28 | Warm |
| Nov | 25 | Warm |
| Dec | 22 | Refreshing |
UV index in Saint-Louis in August
Clear-sky midday UV in August peaks around 11 (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 March 18 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (very 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) | 8 | 11 | 13 | 11 | 12 | 10 | 10 | 11 | 11 | 9 | 8 | 7 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Extreme | Extreme | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 11 | Extreme |
| Mar | 13 | Extreme |
| Apr | 11 | Extreme |
| May | 12 | Extreme |
| Jun | 10 | Extreme |
| Jul | 10 | Very high |
| Aug | 11 | Extreme |
| Sep | 11 | Extreme |
| Oct | 9 | Very high |
| Nov | 8 | Very high |
| Dec | 7 | High |
Air quality in Saint-Louis in August
Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.
Air quality in Saint-Louis is worst in January — around 99 µg/m³ PM2.5 (unhealthy), about 3.3× the cleanest month (August, 30 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 99 | 97 | 70 | 50 | 46 | 61 | 42 | 30 | 35 | 51 | 54 | 90 |
| Level | Unhealthy | Unhealthy | Unhealthy | Poor | Poor | Unhealthy | Poor | Moderate | Moderate | Poor | Poor | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 99 | Unhealthy |
| Feb | 97 | Unhealthy |
| Mar | 70 | Unhealthy |
| Apr | 50 | Poor |
| May | 46 | Poor |
| Jun | 61 | Unhealthy |
| Jul | 42 | Poor |
| Aug | 30 | Moderate |
| Sep | 35 | Moderate |
| Oct | 51 | Poor |
| Nov | 54 | Poor |
| Dec | 90 | Unhealthy |
Where is Saint-Louis?
Saint-Louis sits at 16.0°N, 16.5°W, 8 m above sea level, in Senegal. The nearest listed city is Louga, 53 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 9 m around an average of 1 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 26 m; within 80 km, only modest variations in elevation — a maximum elevation change of 57 m.
The land around Saint-Louis is covered by water (34%), artificial surfaces (27%) and wetland (22%) within 3 km, water (47%) and grassland (26%) within 16 km, and grassland (39%) and water (35%) within 80 km.
Senegal travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / D / E / K
- 230 V · 50 Hz
- Prices
- ≈ 36% of US
- price level, 2025
- GDP per capita
- $1,955
- 2025
- Happiness
- 4.8 / 10
- World Happiness, 2025
- Safe drinking water
- 27%
- of population, 2024
- Homicide rate
- 0.3
- per 100k, 2015
- Road deaths
- 23.5
- per 100k/yr, 2019
- Income group
- Lower middle
- World Bank
- English
- Very low
- EF EPI 442
- Religion
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 (16.0179°, -16.4896°, elevation 8 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).