Dellys in Fall
In fall (September, October and November), Dellys sees average daytime highs around 21°C and overnight lows near 19°C, with 234 mm of rain over about 26 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 25°C in early September to 17°C by late November. The sky is clear or mostly clear about 50% of the time across fall, and the air most often feels humid.
Fall is Dellys's 2nd-best season to visit on our travel score. For the whole year in context, see Dellys's year-round climate.
- Avg daytime high
- 21°C
- 2nd-warmest season
- Avg overnight low
- 19°C
- Rainfall
- 234 mm
- 26 wet days
- Avg wind
- 18 km/h
- Travel score
- 7.0
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Dellys in Fall
Over the season highs ease from about 25°C in early September to 17°C by late November.
A typical fall day in Dellys reaches about 21°C and drops to 19°C overnight. The warmest of the three months is September, the coolest November.
Dellys weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 14° / 12° | 126 | 12.9 | 9.8 | 4.2 |
| Feb | 14° / 12° | 96 | 10.6 | 10.6 | 4.2 |
| Mar | 15° / 13° | 77 | 8.8 | 11.7 | 5.0 |
| Apr | 17° / 14° | 64 | 8.1 | 12.9 | 5.7 |
| May | 19° / 17° | 47 | 5.6 | 13.9 | 7.1 |
| Jun | 22° / 20° | 7 | 1.4 | 14.5 | 8.7 |
| Jul | 25° / 23° | 1 | 0.3 | 14.3 | 9.4 |
| Aug | 26° / 24° | 5 | 1.2 | 13.4 | 8.9 |
| Sep | 24° / 23° | 35 | 5.4 | 12.3 | 8.1 |
| Oct | 22° / 20° | 68 | 7.8 | 11 | 7.2 |
| Nov | 18° / 16° | 132 | 13.1 | 10 | 5.7 |
| Dec | 16° / 13° | 132 | 12.1 | 9.5 | 4.8 |
Cloud cover in Fall
The sky is clear or mostly clear about 50% of the time across fall.
Chance of precipitation in Fall
Dellys gets around 234 mm of rain over 26 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 18 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 48 min in early September to 9 h 42 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.9 kWh/m².
Hazard calendar for Dellys
In fall, Dellys overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Dellys's rainy season runs October–April, when most of the year's rain falls.
Dellys sees seasonal dust haze (June–July), heaviest in July.
Is fall a good time to visit Dellys?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is one of the better times to visit Dellys for general sightseeing.
What to pack for Dellys in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Dellys sees daytime highs around 21°C and nights near 19°C. Worth packing: light clothes, rain gear, sun protection and a windbreaker. About 26 days see rain.
Sea temperature near Dellys in Fall
The nearest coast averages about 22°C across fall — 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 August at about 25°C and coldest in February near 15°C.
It's comfortable for a long swim from Jun 5 to Nov 7 — about 5.1 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 | 24 | 25 | 25 | 22 | 19 | 17 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Refreshing | Refreshing | Warm | Warm | 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 | 24 | Refreshing |
| Aug | 25 | Warm |
| Sep | 25 | Warm |
| Oct | 22 | Refreshing |
| Nov | 19 | Cool |
| Dec | 17 | Cool |
UV index in Dellys in Fall
Clear-sky midday UV across fall averages around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Dellys peaks around July 16 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 6 | 8 | 7 | 9 | 10 | 9 | 7 | 5 | 3 | 2 |
| Level | Moderate | Moderate | High | Very high | Very high | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 3 | Moderate |
| Mar | 6 | High |
| Apr | 8 | Very high |
| May | 7 | Very high |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 9 | Very high |
| Sep | 7 | High |
| Oct | 5 | Moderate |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Air quality in Dellys in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Dellys is worst in August — around 64 µg/m³ PM2.5 (unhealthy), 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) | 47 | 53 | 59 | 57 | 55 | 51 | 63 | 64 | 47 | 55 | 43 | 50 |
| Level | Poor | Poor | Unhealthy | Unhealthy | Poor | Poor | Unhealthy | Unhealthy | Poor | Unhealthy | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 47 | Poor |
| Feb | 53 | Poor |
| Mar | 59 | Unhealthy |
| Apr | 57 | Unhealthy |
| May | 55 | Poor |
| Jun | 51 | Poor |
| Jul | 63 | Unhealthy |
| Aug | 64 | Unhealthy |
| Sep | 47 | Poor |
| Oct | 55 | Unhealthy |
| Nov | 43 | Poor |
| Dec | 50 | Poor |
Where is Dellys?
Dellys sits at 36.9°N, 3.9°E, 63 m above sea level, in Algeria. The nearest listed city is Tadmaït, 19 km away.
Topography around Dellys
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Dellys.
Within 3 km, the terrain around Dellys has significant variations in elevation — a maximum elevation change of 374 m around an average of 61 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 890 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,266 m.
The land around Dellys is covered by water (59%) within 3 km, water (56%) within 16 km, and water (38%), trees (27%) and grassland (20%) 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 Dellys (36.9172°, 3.9131°, elevation 63 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.