Saint-Louis weather in May
In May, Saint-Louis sees average daytime highs of 25°C and overnight lows near 21°C, with 0 mm of rain across 0 wet days and about 12.7 hours of daylight. It is the 8th-warmest and 12th-wettest month of the year here.
Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 77% of the time in May, and the air most often feels humid.
Daylight stretches from about 12 h 36 min at the start of May to 12 h 54 min by month's end. Set against the rest of the year, May is Saint-Louis's 1st-clearest and 3rd-windiest month. For the whole year in context, see Saint-Louis's year-round climate.
- Daytime high
- 25°
- 8th warmest
- Overnight low
- 21°
- 5th coldest
- Rainfall
- 0 mm
- 0 wet days
- Daylight
- 12 h 42 min
- 6:40 AM – 7:25 PM
- Cloud cover
- 22%
- 1st clearest
- Wind
- 22 km/h
- 3rd windiest
- Solar energy
- 7.37 kWh/m²
- Travel score
- 9.1
- 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 May
Day-to-day highs hold fairly steady near 25°C through the month.
A typical May day in Saint-Louis reaches about 25°C in the afternoon and slips back to 21°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 28°C. Set against its neighbours, May runs on par with April and about 1°C cooler than June.
| 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) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
| Avg low (°C) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 25 | 20 |
| 2 | 25 | 20 |
| 3 | 25 | 20 |
| 4 | 25 | 20 |
| 5 | 25 | 20 |
| 6 | 25 | 20 |
| 7 | 25 | 20 |
| 8 | 25 | 20 |
| 9 | 25 | 20 |
| 10 | 25 | 20 |
| 11 | 25 | 21 |
| 12 | 25 | 21 |
| 13 | 25 | 21 |
| 14 | 25 | 21 |
| 15 | 25 | 21 |
| 16 | 25 | 21 |
| 17 | 25 | 21 |
| 18 | 25 | 21 |
| 19 | 25 | 21 |
| 20 | 26 | 21 |
| 21 | 26 | 21 |
| 22 | 26 | 21 |
| 23 | 26 | 21 |
| 24 | 26 | 21 |
| 25 | 26 | 21 |
| 26 | 26 | 22 |
| 27 | 26 | 22 |
| 28 | 26 | 22 |
| 29 | 26 | 22 |
| 30 | 26 | 22 |
| 31 | 26 | 22 |
How May really feels in Saint-Louis
Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Saint-Louis weather by month
How May compares with the rest of the year at a glance. May is the 8th-warmest and 12th-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 May
The sky is clear or mostly clear about 77% of the time in May, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 10% of May, with mostly cloudy or overcast conditions the remaining 13%.
| 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 (%) | 88 | 89 | 89 | 89 | 89 | 90 | 90 | 90 | 90 | 90 | 90 | 89 | 89 | 88 | 87 | 86 | 86 | 86 | 85 | 85 | 85 | 85 | 85 | 84 | 84 | 85 | 85 | 85 | 86 | 86 | 86 |
| Cloudier (%) | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 12 | 13 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 15 | 15 | 15 | 14 | 14 | 14 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 88 | 12 |
| 2 | 89 | 11 |
| 3 | 89 | 11 |
| 4 | 89 | 11 |
| 5 | 89 | 11 |
| 6 | 90 | 10 |
| 7 | 90 | 10 |
| 8 | 90 | 10 |
| 9 | 90 | 10 |
| 10 | 90 | 10 |
| 11 | 90 | 10 |
| 12 | 89 | 11 |
| 13 | 89 | 11 |
| 14 | 88 | 12 |
| 15 | 87 | 13 |
| 16 | 86 | 14 |
| 17 | 86 | 14 |
| 18 | 86 | 14 |
| 19 | 85 | 15 |
| 20 | 85 | 15 |
| 21 | 85 | 15 |
| 22 | 85 | 15 |
| 23 | 85 | 15 |
| 24 | 84 | 16 |
| 25 | 84 | 16 |
| 26 | 85 | 15 |
| 27 | 85 | 15 |
| 28 | 85 | 15 |
| 29 | 86 | 14 |
| 30 | 86 | 14 |
| 31 | 86 | 14 |
Chance of precipitation in May
Saint-Louis gets around 0 mm of rain over 0 wet days in May, the driest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 0% and peaks near 1% on the wettest days.
| 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 (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| Rain chance (%) | |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 0 |
| 19 | 0 |
| 20 | 0 |
| 21 | 0 |
| 22 | 0 |
| 23 | 0 |
| 24 | 0 |
| 25 | 0 |
| 26 | 0 |
| 27 | 0 |
| 28 | 0 |
| 29 | 0 |
| 30 | 1 |
| 31 | 1 |
Humidity in May
Most of May feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, May lands in the humid band about 55% of days. Sticky, muggy-or-worse air turns up on roughly 31% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Comfortable (%) | 28 | 27 | 26 | 25 | 24 | 22 | 21 | 20 | 19 | 17 | 16 | 15 | 13 | 12 | 10 | 9 | 8 | 7 | 6 | 6 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 3 |
| Humid (%) | 60 | 61 | 61 | 61 | 61 | 62 | 61 | 62 | 61 | 62 | 62 | 61 | 61 | 61 | 60 | 60 | 59 | 59 | 59 | 56 | 55 | 54 | 51 | 50 | 48 | 45 | 43 | 40 | 37 | 34 | 32 |
| Muggy (%) | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 17 | 18 | 19 | 21 | 23 | 24 | 26 | 27 | 29 | 31 | 32 | 34 | 36 | 37 | 39 | 41 | 43 | 46 | 48 | 50 | 53 | 56 | 56 |
| Oppressive (%) | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 4 | 5 | 5 | 6 | 7 | 7 | 9 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 4 | 28 | 60 | 8 | 0 |
| 2 | 3 | 27 | 61 | 9 | 0 |
| 3 | 3 | 26 | 61 | 10 | 0 |
| 4 | 3 | 25 | 61 | 11 | 0 |
| 5 | 3 | 24 | 61 | 12 | 0 |
| 6 | 3 | 22 | 62 | 13 | 0 |
| 7 | 3 | 21 | 61 | 14 | 1 |
| 8 | 2 | 20 | 62 | 15 | 1 |
| 9 | 2 | 19 | 61 | 17 | 1 |
| 10 | 2 | 17 | 62 | 18 | 1 |
| 11 | 2 | 16 | 62 | 19 | 1 |
| 12 | 2 | 15 | 61 | 21 | 1 |
| 13 | 2 | 13 | 61 | 23 | 1 |
| 14 | 2 | 12 | 61 | 24 | 1 |
| 15 | 2 | 10 | 60 | 26 | 2 |
| 16 | 2 | 9 | 60 | 27 | 2 |
| 17 | 2 | 8 | 59 | 29 | 2 |
| 18 | 1 | 7 | 59 | 31 | 2 |
| 19 | 1 | 6 | 59 | 32 | 2 |
| 20 | 1 | 6 | 56 | 34 | 3 |
| 21 | 1 | 5 | 55 | 36 | 3 |
| 22 | 1 | 5 | 54 | 37 | 3 |
| 23 | 1 | 5 | 51 | 39 | 4 |
| 24 | 1 | 5 | 50 | 41 | 4 |
| 25 | 0 | 4 | 48 | 43 | 4 |
| 26 | 0 | 4 | 45 | 46 | 5 |
| 27 | 0 | 4 | 43 | 48 | 5 |
| 28 | 0 | 4 | 40 | 50 | 6 |
| 29 | 0 | 3 | 37 | 53 | 7 |
| 30 | 0 | 3 | 34 | 56 | 7 |
| 31 | 0 | 3 | 32 | 56 | 9 |
Wind in May
Winds average 22 km/h in May.
Across May, daily wind ranges from about 21 km/h on the calmest days to 24 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) | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 |
| Feels | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 24 | breezy |
| 2 | 24 | breezy |
| 3 | 24 | breezy |
| 4 | 24 | breezy |
| 5 | 23 | breezy |
| 6 | 23 | breezy |
| 7 | 23 | breezy |
| 8 | 23 | breezy |
| 9 | 23 | breezy |
| 10 | 23 | breezy |
| 11 | 23 | breezy |
| 12 | 23 | breezy |
| 13 | 23 | breezy |
| 14 | 22 | breezy |
| 15 | 22 | breezy |
| 16 | 22 | breezy |
| 17 | 22 | breezy |
| 18 | 22 | breezy |
| 19 | 22 | breezy |
| 20 | 22 | breezy |
| 21 | 22 | breezy |
| 22 | 22 | breezy |
| 23 | 21 | breezy |
| 24 | 21 | breezy |
| 25 | 21 | breezy |
| 26 | 21 | breezy |
| 27 | 21 | breezy |
| 28 | 21 | breezy |
| 29 | 21 | breezy |
| 30 | 21 | breezy |
| 31 | 21 | breezy |
Sunrise & sunset in May
Daylight runs from about 12 h 36 min at the start of May to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 18 minutes over May. Sunrise moves from 6:46 AM to 6:37 AM, and sunset from 7:20 PM to 7:30 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) | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.9 | 12.9 | 12.9 | 12.9 |
| Sunrise (AM) | 6:46 | 6:46 | 6:45 | 6:45 | 6:44 | 6:44 | 6:43 | 6:43 | 6:42 | 6:42 | 6:42 | 6:41 | 6:41 | 6:41 | 6:40 | 6:40 | 6:40 | 6:39 | 6:39 | 6:39 | 6:39 | 6:38 | 6:38 | 6:38 | 6:38 | 6:38 | 6:37 | 6:37 | 6:37 | 6:37 | 6:37 |
| Sunset (PM) | 7:20 | 7:20 | 7:21 | 7:21 | 7:21 | 7:22 | 7:22 | 7:22 | 7:22 | 7:23 | 7:23 | 7:23 | 7:24 | 7:24 | 7:24 | 7:25 | 7:25 | 7:25 | 7:26 | 7:26 | 7:26 | 7:27 | 7:27 | 7:27 | 7:28 | 7:28 | 7:28 | 7:29 | 7:29 | 7:29 | 7:30 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.6 | 6:46 | 7:20 |
| 2 | 12.6 | 6:46 | 7:20 |
| 3 | 12.6 | 6:45 | 7:21 |
| 4 | 12.6 | 6:45 | 7:21 |
| 5 | 12.6 | 6:44 | 7:21 |
| 6 | 12.6 | 6:44 | 7:22 |
| 7 | 12.6 | 6:43 | 7:22 |
| 8 | 12.7 | 6:43 | 7:22 |
| 9 | 12.7 | 6:42 | 7:22 |
| 10 | 12.7 | 6:42 | 7:23 |
| 11 | 12.7 | 6:42 | 7:23 |
| 12 | 12.7 | 6:41 | 7:23 |
| 13 | 12.7 | 6:41 | 7:24 |
| 14 | 12.7 | 6:41 | 7:24 |
| 15 | 12.7 | 6:40 | 7:24 |
| 16 | 12.7 | 6:40 | 7:25 |
| 17 | 12.8 | 6:40 | 7:25 |
| 18 | 12.8 | 6:39 | 7:25 |
| 19 | 12.8 | 6:39 | 7:26 |
| 20 | 12.8 | 6:39 | 7:26 |
| 21 | 12.8 | 6:39 | 7:26 |
| 22 | 12.8 | 6:38 | 7:27 |
| 23 | 12.8 | 6:38 | 7:27 |
| 24 | 12.8 | 6:38 | 7:27 |
| 25 | 12.8 | 6:38 | 7:28 |
| 26 | 12.8 | 6:38 | 7:28 |
| 27 | 12.8 | 6:37 | 7:28 |
| 28 | 12.9 | 6:37 | 7:29 |
| 29 | 12.9 | 6:37 | 7:29 |
| 30 | 12.9 | 6:37 | 7:29 |
| 31 | 12.9 | 6:37 | 7:30 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 7.37 kWh/m² — the sunniest month for solar.
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 — May's 7.37 kWh/m² sits near the top of that range.
| 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) | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.3 | 7.3 | 7.3 | 7.3 | 7.3 | 7.3 | 7.3 | 7.3 | 7.3 | 7.3 | 7.3 | 7.3 | 7.3 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 7.4 | Intense |
| 2 | 7.4 | Intense |
| 3 | 7.4 | Intense |
| 4 | 7.4 | Intense |
| 5 | 7.4 | Intense |
| 6 | 7.4 | Intense |
| 7 | 7.4 | Intense |
| 8 | 7.4 | Intense |
| 9 | 7.4 | Intense |
| 10 | 7.4 | Intense |
| 11 | 7.4 | Intense |
| 12 | 7.4 | Intense |
| 13 | 7.4 | Intense |
| 14 | 7.4 | Intense |
| 15 | 7.4 | Intense |
| 16 | 7.4 | Intense |
| 17 | 7.4 | Intense |
| 18 | 7.4 | Intense |
| 19 | 7.3 | Intense |
| 20 | 7.3 | Intense |
| 21 | 7.3 | Intense |
| 22 | 7.3 | Intense |
| 23 | 7.3 | Intense |
| 24 | 7.3 | Intense |
| 25 | 7.3 | Intense |
| 26 | 7.3 | Intense |
| 27 | 7.3 | Intense |
| 28 | 7.3 | Intense |
| 29 | 7.3 | Intense |
| 30 | 7.3 | Intense |
| 31 | 7.3 | Intense |
Hazard calendar for Saint-Louis
In May, Saint-Louis sits inside its 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 May a good time to visit Saint-Louis?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is one of the better times to visit Saint-Louis for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Saint-Louis in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Saint-Louis sees daytime highs around 25°C and nights near 21°C. Pack sun protection. Worth having: light clothes and a windbreaker.
Sea temperature near Saint-Louis in May
The nearest coast averages about 21°C in May — 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 May
Clear-sky midday UV in May peaks around 12 (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 May
Average fine-particle pollution (PM2.5) through the year — so you can see where May 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).