Oued Sly weather in September
In September, Oued Sly sees average daytime highs of 31°C and overnight lows near 18°C, with 20 mm of rain across 4.1 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.
Highs ease over the month, from about 34°C in the first days to 29°C by the end. The sky is clear or mostly clear about 59% of the time in September, and the air most often feels comfortable.
Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Oued Sly's 4th-clearest and 10th-windiest month. For the whole year in context, see Oued Sly's year-round climate.
- Daytime high
- 31°
- 4th warmest
- Overnight low
- 18°
- 10th coldest
- Rainfall
- 20 mm
- 4.1 wet days
- Daylight
- 12 h 12 min
- 6:43 AM – 6:56 PM
- Cloud cover
- 37%
- 4th clearest
- Wind
- 7 km/h
- 10th windiest
- Solar energy
- 5.45 kWh/m²
- Travel score
- 5.3
- out of 10
Temperature in September
Highs ease over the month, from about 34°C in the first days to 29°C by the end.
A typical September day in Oued Sly reaches about 31°C in the afternoon and slips back to 18°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 35°C. Set against its neighbours, September runs about 5°C cooler than August and about 5°C warmer than October.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 34 | 34 | 34 | 34 | 33 | 33 | 33 | 33 | 32 | 32 | 32 | 32 | 32 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 28 |
| Avg low (°C) | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 34 | 21 |
| 2 | 34 | 20 |
| 3 | 34 | 20 |
| 4 | 34 | 20 |
| 5 | 33 | 20 |
| 6 | 33 | 20 |
| 7 | 33 | 20 |
| 8 | 33 | 19 |
| 9 | 32 | 19 |
| 10 | 32 | 19 |
| 11 | 32 | 19 |
| 12 | 32 | 19 |
| 13 | 32 | 19 |
| 14 | 31 | 18 |
| 15 | 31 | 18 |
| 16 | 31 | 18 |
| 17 | 31 | 18 |
| 18 | 30 | 18 |
| 19 | 30 | 18 |
| 20 | 30 | 18 |
| 21 | 30 | 17 |
| 22 | 30 | 17 |
| 23 | 30 | 17 |
| 24 | 29 | 17 |
| 25 | 29 | 17 |
| 26 | 29 | 17 |
| 27 | 29 | 17 |
| 28 | 29 | 17 |
| 29 | 29 | 16 |
| 30 | 28 | 16 |
How September really feels in Oued Sly
Once humidity and wind are folded in, September averages 10 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 September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Oued Sly weather by month
How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 15° / 5° | 53 | 8.8 | 9.8 | 4.7 |
| Feb | 16° / 6° | 49 | 8.5 | 10.6 | 5.3 |
| Mar | 19° / 8° | 52 | 7.8 | 11.7 | 6.6 |
| Apr | 22° / 10° | 50 | 7.8 | 12.9 | 7.2 |
| May | 27° / 14° | 32 | 5.1 | 13.9 | 7.4 |
| Jun | 32° / 18° | 7 | 1.5 | 14.4 | 5.0 |
| Jul | 36° / 22° | 2 | 0.4 | 14.2 | 2.5 |
| Aug | 36° / 22° | 6 | 1.7 | 13.4 | 2.6 |
| Sep | 31° / 18° | 20 | 4.1 | 12.2 | 5.3 |
| Oct | 26° / 14° | 31 | 5.4 | 11.1 | 7.6 |
| Nov | 19° / 10° | 56 | 8.7 | 10.1 | 6.5 |
| Dec | 16° / 7° | 47 | 7.5 | 9.6 | 5.4 |
Cloud cover in September
The sky is clear or mostly clear about 59% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 26%. 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 85 | 84 | 82 | 82 | 81 | 79 | 79 | 77 | 77 | 76 | 75 | 74 | 74 | 74 | 72 | 72 | 71 | 71 | 71 | 69 | 69 | 69 | 69 | 69 | 68 | 68 | 70 | 70 | 70 | 69 |
| Cloudier (%) | 15 | 16 | 18 | 18 | 19 | 21 | 21 | 23 | 23 | 24 | 25 | 26 | 26 | 26 | 28 | 28 | 29 | 29 | 29 | 31 | 31 | 31 | 31 | 31 | 32 | 32 | 30 | 30 | 30 | 31 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 85 | 15 |
| 2 | 84 | 16 |
| 3 | 82 | 18 |
| 4 | 82 | 18 |
| 5 | 81 | 19 |
| 6 | 79 | 21 |
| 7 | 79 | 21 |
| 8 | 77 | 23 |
| 9 | 77 | 23 |
| 10 | 76 | 24 |
| 11 | 75 | 25 |
| 12 | 74 | 26 |
| 13 | 74 | 26 |
| 14 | 74 | 26 |
| 15 | 72 | 28 |
| 16 | 72 | 28 |
| 17 | 71 | 29 |
| 18 | 71 | 29 |
| 19 | 71 | 29 |
| 20 | 69 | 31 |
| 21 | 69 | 31 |
| 22 | 69 | 31 |
| 23 | 69 | 31 |
| 24 | 69 | 31 |
| 25 | 68 | 32 |
| 26 | 68 | 32 |
| 27 | 70 | 30 |
| 28 | 70 | 30 |
| 29 | 70 | 30 |
| 30 | 69 | 31 |
Chance of precipitation in September
Oued Sly gets around 20 mm of rain over 4.1 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 13% and peaks near 16% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 10 | 10 | 11 | 11 | 11 | 12 | 12 | 13 | 13 | 14 | 14 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 |
| Rain chance (%) | |
|---|---|
| 1 | 7 |
| 2 | 7 |
| 3 | 8 |
| 4 | 8 |
| 5 | 8 |
| 6 | 9 |
| 7 | 9 |
| 8 | 10 |
| 9 | 10 |
| 10 | 11 |
| 11 | 11 |
| 12 | 11 |
| 13 | 12 |
| 14 | 12 |
| 15 | 13 |
| 16 | 13 |
| 17 | 14 |
| 18 | 14 |
| 19 | 15 |
| 20 | 15 |
| 21 | 16 |
| 22 | 16 |
| 23 | 16 |
| 24 | 16 |
| 25 | 16 |
| 26 | 16 |
| 27 | 16 |
| 28 | 16 |
| 29 | 16 |
| 30 | 15 |
Humidity in September
Most of September feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the comfortable band about 34% of days. Sticky, muggy-or-worse air turns up on roughly 8% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 21 | 21 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 35 | 35 | 35 | 36 | 36 | 36 | 36 | 36 | 37 | 37 | 38 | 39 | 39 | 40 |
| Comfortable (%) | 34 | 35 | 35 | 36 | 36 | 35 | 35 | 34 | 34 | 33 | 32 | 32 | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 33 | 33 | 34 | 35 | 36 | 37 | 37 | 38 | 39 | 39 | 40 |
| Humid (%) | 32 | 32 | 32 | 31 | 31 | 30 | 30 | 29 | 29 | 28 | 28 | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 23 | 23 | 22 | 21 | 20 | 19 | 19 |
| Muggy (%) | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 7 | 6 | 6 | 5 | 5 | 4 | 3 | 3 | 2 | 2 | 1 |
| Oppressive (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 21 | 34 | 32 | 12 | 1 |
| 2 | 21 | 35 | 32 | 11 | 1 |
| 3 | 21 | 35 | 32 | 11 | 1 |
| 4 | 22 | 36 | 31 | 11 | 1 |
| 5 | 23 | 36 | 31 | 10 | 1 |
| 6 | 24 | 35 | 30 | 10 | 1 |
| 7 | 25 | 35 | 30 | 10 | 1 |
| 8 | 26 | 34 | 29 | 10 | 0 |
| 9 | 27 | 34 | 29 | 10 | 0 |
| 10 | 29 | 33 | 28 | 10 | 0 |
| 11 | 30 | 32 | 28 | 10 | 0 |
| 12 | 31 | 32 | 27 | 10 | 0 |
| 13 | 32 | 31 | 27 | 10 | 0 |
| 14 | 33 | 31 | 26 | 10 | 0 |
| 15 | 34 | 31 | 26 | 9 | 0 |
| 16 | 35 | 31 | 26 | 9 | 0 |
| 17 | 35 | 31 | 25 | 9 | 0 |
| 18 | 35 | 31 | 25 | 8 | 0 |
| 19 | 35 | 32 | 25 | 8 | 0 |
| 20 | 36 | 33 | 25 | 7 | 0 |
| 21 | 36 | 33 | 25 | 6 | 0 |
| 22 | 36 | 34 | 24 | 6 | 0 |
| 23 | 36 | 35 | 24 | 5 | 0 |
| 24 | 36 | 36 | 23 | 5 | 0 |
| 25 | 37 | 37 | 23 | 4 | 0 |
| 26 | 37 | 37 | 22 | 3 | 0 |
| 27 | 38 | 38 | 21 | 3 | 0 |
| 28 | 39 | 39 | 20 | 2 | 0 |
| 29 | 39 | 39 | 19 | 2 | 0 |
| 30 | 40 | 40 | 19 | 1 | 0 |
Wind in September
Winds average 7 km/h in September.
Across September, daily wind ranges from about 7 km/h on the calmest days to 7 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 7 | calm |
| 2 | 7 | calm |
| 3 | 7 | calm |
| 4 | 7 | calm |
| 5 | 7 | calm |
| 6 | 7 | calm |
| 7 | 7 | calm |
| 8 | 7 | calm |
| 9 | 7 | calm |
| 10 | 7 | calm |
| 11 | 7 | calm |
| 12 | 7 | calm |
| 13 | 7 | calm |
| 14 | 7 | calm |
| 15 | 7 | calm |
| 16 | 7 | calm |
| 17 | 7 | calm |
| 18 | 7 | calm |
| 19 | 7 | calm |
| 20 | 7 | calm |
| 21 | 7 | calm |
| 22 | 7 | calm |
| 23 | 7 | calm |
| 24 | 7 | calm |
| 25 | 7 | calm |
| 26 | 7 | calm |
| 27 | 7 | calm |
| 28 | 7 | calm |
| 29 | 7 | calm |
| 30 | 7 | calm |
Sunrise & sunset in September
Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 66 minutes over September. Sunrise moves from 6:31 AM to 6:54 AM, and sunset from 7:19 PM to 6:35 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.8 | 12.8 | 12.7 | 12.7 | 12.7 | 12.6 | 12.6 | 12.5 | 12.5 | 12.5 | 12.4 | 12.4 | 12.3 | 12.3 | 12.3 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12.0 | 12.0 | 12.0 | 11.9 | 11.9 | 11.8 | 11.8 | 11.8 | 11.7 | 11.7 |
| Sunrise (AM) | 6:31 | 6:32 | 6:32 | 6:33 | 6:34 | 6:35 | 6:36 | 6:36 | 6:37 | 6:38 | 6:39 | 6:40 | 6:40 | 6:41 | 6:42 | 6:43 | 6:44 | 6:44 | 6:45 | 6:46 | 6:47 | 6:48 | 6:48 | 6:49 | 6:50 | 6:51 | 6:52 | 6:53 | 6:53 | 6:54 |
| Sunset (PM) | 7:19 | 7:18 | 7:16 | 7:15 | 7:13 | 7:12 | 7:10 | 7:09 | 7:07 | 7:06 | 7:04 | 7:02 | 7:01 | 6:59 | 6:58 | 6:56 | 6:55 | 6:53 | 6:52 | 6:50 | 6:49 | 6:47 | 6:45 | 6:44 | 6:42 | 6:41 | 6:39 | 6:38 | 6:36 | 6:35 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.8 | 6:31 | 7:19 |
| 2 | 12.8 | 6:32 | 7:18 |
| 3 | 12.7 | 6:32 | 7:16 |
| 4 | 12.7 | 6:33 | 7:15 |
| 5 | 12.7 | 6:34 | 7:13 |
| 6 | 12.6 | 6:35 | 7:12 |
| 7 | 12.6 | 6:36 | 7:10 |
| 8 | 12.5 | 6:36 | 7:09 |
| 9 | 12.5 | 6:37 | 7:07 |
| 10 | 12.5 | 6:38 | 7:06 |
| 11 | 12.4 | 6:39 | 7:04 |
| 12 | 12.4 | 6:40 | 7:02 |
| 13 | 12.3 | 6:40 | 7:01 |
| 14 | 12.3 | 6:41 | 6:59 |
| 15 | 12.3 | 6:42 | 6:58 |
| 16 | 12.2 | 6:43 | 6:56 |
| 17 | 12.2 | 6:44 | 6:55 |
| 18 | 12.1 | 6:44 | 6:53 |
| 19 | 12.1 | 6:45 | 6:52 |
| 20 | 12.1 | 6:46 | 6:50 |
| 21 | 12.0 | 6:47 | 6:49 |
| 22 | 12.0 | 6:48 | 6:47 |
| 23 | 12.0 | 6:48 | 6:45 |
| 24 | 11.9 | 6:49 | 6:44 |
| 25 | 11.9 | 6:50 | 6:42 |
| 26 | 11.8 | 6:51 | 6:41 |
| 27 | 11.8 | 6:52 | 6:39 |
| 28 | 11.8 | 6:53 | 6:38 |
| 29 | 11.7 | 6:53 | 6:36 |
| 30 | 11.7 | 6:54 | 6:35 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 5.45 kWh/m².
For context, solar energy here swings from a low near 2.31 kWh/m² to a high of 7.64 kWh/m² in July across the year — September's 5.45 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.3 | 6.2 | 6.2 | 6.1 | 6.0 | 6.0 | 5.9 | 5.9 | 5.8 | 5.8 | 5.7 | 5.7 | 5.6 | 5.5 | 5.5 | 5.4 | 5.4 | 5.3 | 5.3 | 5.2 | 5.2 | 5.1 | 5.1 | 5.0 | 5.0 | 4.9 | 4.9 | 4.8 | 4.8 | 4.8 |
| Level | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | 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 | 6.2 | Intense |
| 3 | 6.2 | Intense |
| 4 | 6.1 | Intense |
| 5 | 6.0 | Intense |
| 6 | 6.0 | Bright |
| 7 | 5.9 | Bright |
| 8 | 5.9 | Bright |
| 9 | 5.8 | Bright |
| 10 | 5.8 | Bright |
| 11 | 5.7 | Bright |
| 12 | 5.7 | Bright |
| 13 | 5.6 | Bright |
| 14 | 5.5 | Bright |
| 15 | 5.5 | Bright |
| 16 | 5.4 | Bright |
| 17 | 5.4 | Bright |
| 18 | 5.3 | Bright |
| 19 | 5.3 | Bright |
| 20 | 5.2 | Bright |
| 21 | 5.2 | Bright |
| 22 | 5.1 | Bright |
| 23 | 5.1 | Bright |
| 24 | 5.0 | Bright |
| 25 | 5.0 | Bright |
| 26 | 4.9 | Bright |
| 27 | 4.9 | Bright |
| 28 | 4.8 | Bright |
| 29 | 4.8 | Bright |
| 30 | 4.8 | Bright |
Hazard calendar for Oued Sly
None of Oued Sly's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Oued Sly sees seasonal dust haze (July–August), heaviest in July.
Is September a good time to visit Oued Sly?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a reasonable time to visit Oued Sly for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Oued Sly in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Oued Sly sees daytime highs around 31°C and nights near 18°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.
Sea temperature near Oued Sly in September
The nearest coast averages about 24°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 42 km away) is warmest in August at about 25°C and coldest in February near 15°C.
It's comfortable for a long swim from Jun 8 to Nov 1 — about 4.8 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 16 | 15 | 15 | 16 | 18 | 21 | 23 | 25 | 24 | 21 | 19 | 17 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Refreshing | Refreshing | Warm | Refreshing | Refreshing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 16 | Cool |
| Feb | 15 | Cool |
| Mar | 15 | Cool |
| Apr | 16 | Cool |
| May | 18 | Cool |
| Jun | 21 | Refreshing |
| Jul | 23 | Refreshing |
| Aug | 25 | Warm |
| Sep | 24 | Refreshing |
| Oct | 21 | Refreshing |
| Nov | 19 | Cool |
| Dec | 17 | Cool |
UV index in Oued Sly in September
Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Oued Sly peaks around July 16 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 4 | 7 | 7 | 8 | 9 | 10 | 8 | 7 | 5 | 3 | 2 |
| Level | Moderate | Moderate | High | High | Very high | Very high | Very high | Very high | Very high | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 4 | Moderate |
| Mar | 7 | High |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 8 | Very high |
| Sep | 7 | Very high |
| Oct | 5 | Moderate |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Air quality in Oued Sly in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Oued Sly is worst in September — around 28 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 18 | 22 | 27 | 23 | 19 | 21 | 26 | 27 | 28 | 22 | 19 | 19 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 18 | Moderate |
| Feb | 22 | Moderate |
| Mar | 27 | Moderate |
| Apr | 23 | Moderate |
| May | 19 | Moderate |
| Jun | 21 | Moderate |
| Jul | 26 | Moderate |
| Aug | 27 | Moderate |
| Sep | 28 | Moderate |
| Oct | 22 | Moderate |
| Nov | 19 | Moderate |
| Dec | 19 | Moderate |
Where is Oued Sly?
Oued Sly sits at 36.1°N, 1.2°E, 90 m above sea level, in Algeria. The nearest listed city is Boukadir, 8.0 km away.
Topography around Oued Sly
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Oued Sly.
Within 3 km, the terrain around Oued Sly has only modest variations in elevation — a maximum elevation change of 167 m around an average of 104 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 653 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,916 m.
The land around Oued Sly is covered by trees (29%) and cropland (28%) within 3 km, cropland (41%) and grassland (39%) within 16 km, and grassland (30%), cropland (30%) and water (21%) within 80 km.
Algeria travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 33% of US
- price level, 2025
- GDP per capita
- $6,051
- 2025
- Happiness
- 5.7 / 10
- World Happiness, 2025
- Safe drinking water
- 69%
- of population, 2024
- Homicide rate
- 1.2
- per 100k, 2023
- Road deaths
- 20.9
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 468
- 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 Oued Sly (36.1012°, 1.1995°, elevation 90 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. 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).