When you picture fall in Algiers, you probably imagine a season full of change that’s both mild and refreshing. Average daily highs slip from the warm mid-80s °F in early September to the mid-60s °F by late November. Nights cool from the mid-60s °F to the upper 40s °F.
This steady shift creates a comfortable window between the hot summers and the cooler winters. Autumn really feels like one of the most balanced times of year.
You’ll notice the rhythm of the sky changes too. Clear, sunny days in early fall gradually give way to more cloud cover as the season moves forward. The chance of rain climbs steadily.
By late November, short bursts of heavier rainfall show up more often. That shapes the landscape and daily routines.
Daylight hours shrink quickly, trimming over three hours of sunlight between September and November. This, paired with cooler evenings and rising winds, brings a distinct seasonal vibe.
You’ll probably plan your activities around these changes—maybe exploring the city, hanging out on the coast, or getting ready for the wetter months ahead.
Typical Fall Temperatures in Algiers
Fall in Algiers brings a steady cooling trend, with mild days and cooler nights. You’ll notice the shift in both daytime highs and nighttime lows as September turns into November.
Average Highs and Lows
At the start of fall, average high temperatures hit about 84°F (29°C). By late November, highs drop closer to 64°F (18°C).
That’s a pretty clear 20-degree drop over the season.
Average low temperatures dip too. Early in the season, lows hover around 66°F (19°C). By the end of fall, they drop to about 47°F (8°C).
Nights get cooler and more comfortable, especially compared to those sticky summer months.
Here’s a quick snapshot:
| Month | Avg High | Avg Low |
|---|---|---|
| September | ~84°F (29°C) | ~66°F (19°C) |
| October | ~75°F (24°C) | ~56°F (13°C) |
| November | ~64°F (18°C) | ~47°F (8°C) |
These averages make fall a great time for outdoor activities.
Temperature Changes Throughout Fall
The transition from September to November feels gradual, but you’ll notice it. Early fall still holds onto some summer warmth, especially during the day.
By October, cooler evenings make light jackets a good idea. November often feels crisp, especially at night.
Daytime temperatures rarely top 91°F (33°C) or drop below 57°F (14°C) during fall. Nighttime lows almost never go under 41°F (5°C), so frost isn’t a worry.
The sea surface temperature along the coast also cools off. The Mediterranean waters around Algiers drop from about 77°F (25°C) in September to 64°F (18°C) by late November.
Swimming feels fine early in the season, but by the end, it’s not quite as appealing.
Both air and water temperatures shape how you experience the city in the fall.
Comparison With Other Seasons
Compared to summer, fall feels cooler and a lot less humid. Summer highs average 82–86°F (28–30°C), with nights sticking near 68°F (20°C)—it gets muggy.
Fall nights are drier and cooler.
Against winter, fall is much milder. Winter highs sit closer to 60°F (16°C), with lows around 42°F (6°C). Frost can show up in winter, but not in fall.
Spring temperatures in Algiers mirror fall, just in reverse. Highs climb from the mid-60s to the upper 70s, and lows rise steadily.
Fall usually feels drier and clearer than spring though, making it a bit more comfortable for outdoor sightseeing.
Rainfall Patterns and Precipitation Trends
Rainfall in Algiers during fall shifts from light, scattered showers in early September to more frequent and heavier rain by late November. You’ll spot a clear Mediterranean pattern: the season starts off pretty dry, then quickly transitions into the wetter months leading into winter.
Monthly Rainfall Totals
Rainfall amounts in Algiers climb sharply as fall goes on. In early September, you’ll typically see around 0.5 inches (12 mm) of rain in a 31‑day period.
By late November, that grows to about 2.7 inches (69 mm).
The wettest stretch of the year usually falls between November and January, when storms off the Mediterranean bring steady rain.
Algiers records 600–640 mm (23–25 inches) of rain per year, with a big chunk of that falling in late fall and winter.
September often feels relatively dry, while November kicks off the true rainy season. If you’re planning a visit, expect lighter showers early in the season and heavier, more frequent rainfall as December approaches.
Chance of Wet Days
The odds of a wet day in fall rise fast. At the start of September, there’s only about an 8% chance of measurable rain on any given day.
By the end of November, that jumps to nearly 28%.
A “wet day” means at least 0.04 inches (1 mm) of precipitation. That covers both quick showers and longer, steady rain.
For context, the driest time of year in Algiers comes in mid‑summer, when the chance of rain drops to just 2%. Late November nearly hits the highest daily chance of rain seen all year.
Seasonal Rainfall Increases
Rainfall builds quickly as fall progresses. In just three months, average 31‑day totals rise from 0.5 inches in September to 2.7 inches in November.
This jump marks the shift from dry summer weather to the Mediterranean wet season. Storms roll in more often, cloud cover increases, and the ground starts soaking up the moisture that supports winter crops and vegetation.
If you’re traveling, September offers more outdoor flexibility. By November, you’ll probably need to plan around rain showers.
For locals, this change signals the start of the water recharge period that keeps reservoirs and agriculture going through the drier months.
Cloud Cover and Sky Conditions
During fall in Algiers, you’ll spot a steady shift in sky conditions. Skies start out clearer in early September, but by late November, you’ll see more clouds and overcast days, along with a higher chance of cloudy skies.
Frequency of Cloudy Skies
In September, skies are often clear or partly cloudy. About three-quarters of days show good sun.
As fall moves on, that number drops. By late October, cloudy skies become more common, and by November, you can expect a lot more overcast days.
Early fall works best if you want bright, sunny days. Later fall brings more gray skies, which can cramp outdoor plans like walking tours or seaside visits.
The extra cloud cover softens the overall light. Photographers and travelers notice the daylight feels more diffused later in the season, compared to September’s sharper light.
Changes in Overcast Days
Overcast days ramp up fast. At the start of September, the odds of a mostly cloudy or overcast day sit around one in four.
By the end of October, it’s closer to two in five.
Late October is usually the cloudiest stretch, with the highest chance of gray, overcast skies. These days often show up with the rising chance of rain, so you might get both at once.
If you’re planning a trip, expect late fall to bring more days with limited sunshine. It’s smart to schedule key outdoor activities earlier in the season, when skies are clearer.
Clear Versus Cloudy Periods
The balance between clear and cloudy days changes quickly in fall. Early September brings mostly clear skies on many days, but by November, clear days are harder to find.
Here’s a rough breakdown:
- Early fall (September): Clear or mostly clear about 70–75% of the time.
- Mid fall (October): Clear days drop to around 60%.
- Late fall (November): Clear skies show up on fewer than half the days.
This shift affects how much direct sunlight you get. If you love sunny days, September is your best bet. November feels cooler and dimmer, thanks to all those clouds.
Daylight and Sunlight Duration
During fall in Algiers, the amount of daylight shrinks steadily from late September into November. You’ll notice shorter days, earlier sunsets, and longer nights.
These changes shape how you plan your days and sightseeing.
Length of Daylight Hours
In September, you get about 12 hours and 20 minutes of daylight. By October, it drops to about 11 hours. By late November, it’s just under 10 hours.
Evenings arrive sooner, and mornings stay darker. The change isn’t sudden, but it’s definitely steady.
Here’s a simple chart:
| Month | Average Daylight |
|---|---|
| September | ~12h 20m |
| October | ~11h |
| November | ~9h 50m |
The shrinking daylight window stands out most in the second half of autumn, when days feel much shorter.
Sunrise and Sunset Times
Sunrise and sunset times shift by several minutes each day. In early September, the sun comes up around 6:20 AM and sets near 6:40 PM.
By mid-October, sunrise slips to about 7:00 AM, with sunset close to 6:15 PM.
By late November, mornings start later, around 7:20 AM, and evenings end earlier, near 5:15 PM. Afternoons become the best time for outdoor activities.
Expect sunset to move earlier at a steady pace. It’s worth planning around these times to avoid getting caught out after dark.
Twilight and Nightfall Changes
Twilight changes a lot in fall. In September, civil twilight—when there’s still enough light to see—lasts about 30 to 35 minutes after sunset.
By November, twilight drops to about 25 minutes, so night falls faster.
Morning twilight follows the same pattern, starting later each week. Early risers notice less light before sunrise as the season moves on.
The quicker shift from dusk to night in late autumn makes evenings feel longer. You might find yourself relying on streetlights and indoor lighting earlier in the day, especially in November.
Environmental and Geographic Influences
Algiers gets its fall weather from its coastal spot on the Mediterranean Sea and the varied terrain around the city. These features influence temperature swings, rainfall, and how comfortable outdoor activities feel during the season.
Impact of Mediterranean Location
Algiers sits right on the Mediterranean coast, which helps moderate temperatures in fall. The sea holds onto summer heat well into September, keeping early autumn warm. Later months cool more gradually.
This setup brings mild daytime highs and cooler nights, but without sharp extremes.
Moist air from the sea also bumps up humidity and brings more rain. Showers get more frequent in fall, especially in October and November.
This pattern matches the classic Mediterranean climate, where wet winters follow dry summers.
Sea surface temperatures, averaging about 24.5 °C in September and dropping to 22.5 °C in October, still affect comfort. Swimming gets less popular, but the sea’s warmth keeps coastal cold snaps at bay.
Thanks to this coastal buffer, you’ll get a smoother seasonal transition in Algiers than in inland Algerian towns, where temperatures drop more sharply in the same months.
Elevation and Topography Effects
Algiers sits about 30 meters above sea level. The nearby hills and Atlas Mountains climb much higher to the south.
This mix of low coastal land and rising terrain shapes microclimates that really change fall weather.
At night, suburbs far from the sea usually get cooler. Cold air slips down from the hills, so inland spots can feel a few degrees colder than central Algiers. That’s why you’ll see frost or even a rare snowfall more often in the mountains behind the city.
Researchers using data from the Shuttle Radar Topography Mission (SRTM) have mapped out the steep slopes and changing elevations that steer wind flow. Breezes often funnel through valleys, which can cause sudden gusts and shifts in humidity.
Land cover makes a difference too. The Global Land Cover Share shows the area has a patchwork of urban spaces, cropland, and pockets of forest. Each surface holds and releases heat its own way, so you’ll notice small changes in temperature and rainfall from one neighborhood to the next.
Travel and Lifestyle Considerations
Fall in Algiers means cooler air, shorter days, and more rain than in summer. These shifts influence when you’ll want to go out, how you get your home ready, and what to expect if you’re traveling around the city.
Best Times to Visit in Fall
You’ll find the warmest days in early September, with highs in the low 80s °F (around 28 °C). By late November, highs usually settle near the mid-60s °F (about 18 °C). For sightseeing and outdoor plans, early to mid-fall feels the nicest.
Rain picks up as fall goes on. September stays mostly dry, but November can bring over 2 inches of rain. Prefer clearer skies? Try to visit before October wraps up.
Daylight fades by more than three hours from September to November. Later in the season, you just won’t get as much time for day trips. September gives you nearly 13 hours of daylight, but by late November, you’re looking at less than 10.
Weather Impact on Travel Plans
Rain and cloud cover both ramp up through the fall months. Early September rarely sees wet days, but by late November, rain becomes much more common. This change can mess with walking tours, beach days, and ferry rides. It’s smart to keep a light rain jacket or umbrella close.
Winds pick up too, starting around 8 mph in September and climbing past 10 mph by late fall. Stronger gusts can delay coastal trips or outdoor events, especially near the port.
Sea temperatures begin near 77 °F (25 °C) in September, which feels great for swimming. By November, the water cools to about 64 °F (18 °C), so if you want to swim, it’s better to go earlier in the season.
Home Preparation Tips
If you live in Algiers, fall’s the time to get your home ready for cooler, wetter weather. Check window seals and doors so you don’t get stuck with chilly drafts when the temperature drops into the 40s °F (single digits °C) at night by November.
Rainfall picks up fast, so go ahead and clean gutters and drains to keep water from pooling up. I’d keep a backup stash of candles or flashlights handy, just in case storms knock out the power for a bit.
Humidity falls off a cliff as the season goes on, so you might notice the air inside feels drier. A small humidifier can make things a lot more comfortable as the weather changes.