Dellys weather in December

In December, Dellys sees average daytime highs of 16°C and overnight lows near 13°C, with 132 mm of rain across 12.1 wet days and about 9.5 hours of daylight. It is the 9th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 16°C through the month. The sky is clear or mostly clear about 37% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 42 min at the start of December to 9 h 30 min by month's end. Set against the rest of the year, December is Dellys's 12th-clearest and 2nd-windiest month. For the whole year in context, see Dellys's year-round climate.

Daytime high
16°
9th warmest
Overnight low
13°
4th coldest
Rainfall
132 mm
12.1 wet days
Daylight
9 h 30 min
7:56 AM – 5:25 PM
Cloud cover
50%
12th clearest
Wind
20 km/h
2nd windiest
Solar energy
2.22 kWh/m²
Travel score
4.8
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 16°C through the month.

A typical December day in Dellys reaches about 16°C in the afternoon and slips back to 13°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 18°C. Set against its neighbours, December runs about 3°C cooler than November and about 1°C warmer than January.

10°13°15°18°20°151015202531
Avg high (°C)Avg low (°C)
11714
21614
31614
41614
51614
61614
71614
81614
91614
101614
111614
121613
131613
141613
151613
161613
171613
181613
191513
201513
211513
221513
231513
241513
251513
261513
271513
281513
291513
301513
311513

Dellys weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan14° / 12°12612.99.84.2
Feb14° / 12°9610.610.64.2
Mar15° / 13°778.811.75.0
Apr17° / 14°648.112.95.7
May19° / 17°475.613.97.1
Jun22° / 20°71.414.58.7
Jul25° / 23°10.314.39.4
Aug26° / 24°51.213.48.9
Sep24° / 23°355.412.38.1
Oct22° / 20°687.8117.2
Nov18° / 16°13213.1105.7
Dec16° / 13°13212.19.54.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 24% of December, with mostly cloudy or overcast conditions the remaining 39%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15941
26040
36040
46040
56139
66139
76139
86139
96139
106139
116139
126139
136040
146139
156139
166040
176040
186040
196040
206040
216040
226040
236040
246040
256238
266238
276337
286337
296436
306535
316535

Chance of precipitation in December

Any precipitation

Dellys gets around 132 mm of rain over 12.1 wet days in December, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 39% and peaks near 43% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
143
243
342
442
541
640
739
839
939
1038
1138
1238
1339
1439
1539
1638
1738
1839
1939
2039
2139
2240
2340
2439
2539
2639
2738
2838
2938
3038
3137

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the dry band about 92% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
18020
28218
38416
48515
58614
68812
78911
89010
9919
10928
11928
12928
13937
14937
15937
16937
17937
18937
19937
20946
21946
22946
23946
24946
25955
26955
27955
28955
29964
30964
31964

Wind in December

Winds average 20 km/h in December.

Across December, daily wind ranges from about 20 km/h on the calmest days to 21 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
120breezy
220breezy
320breezy
420breezy
520breezy
620breezy
720breezy
820breezy
920breezy
1020light breeze
1120light breeze
1220light breeze
1320light breeze
1420light breeze
1520light breeze
1620light breeze
1720light breeze
1820light breeze
1920light breeze
2020breezy
2120breezy
2220breezy
2320breezy
2420breezy
2520breezy
2621breezy
2721breezy
2821breezy
2921breezy
3021breezy
3121breezy

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 42 min at the start of December to 9 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:45 AM to 8:02 AM, and sunset from 5:24 PM to 5:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.77:455:24
29.67:455:24
39.67:465:23
49.67:475:23
59.67:485:23
69.67:495:23
79.67:505:23
89.57:505:23
99.57:515:24
109.57:525:24
119.57:535:24
129.57:535:24
139.57:545:24
149.57:555:24
159.57:555:25
169.57:565:25
179.57:575:25
189.57:575:26
199.57:585:26
209.57:585:26
219.57:595:27
229.57:595:27
239.58:005:28
249.58:005:28
259.58:015:29
269.58:015:29
279.58:015:30
289.58:025:31
299.58:025:31
309.58:025:32
319.58:025:33

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.22 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.22 kWh/m² to a high of 7.46 kWh/m² in July across the year — December's 2.22 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.3Moderate
22.3Moderate
32.3Moderate
42.3Moderate
52.3Moderate
62.3Moderate
72.3Moderate
82.3Moderate
92.3Moderate
102.2Moderate
112.2Moderate
122.2Moderate
132.2Moderate
142.2Moderate
152.2Moderate
162.2Moderate
172.2Moderate
182.2Moderate
192.2Moderate
202.2Moderate
212.2Moderate
222.2Moderate
232.2Moderate
242.2Moderate
252.2Moderate
262.2Moderate
272.2Moderate
282.3Moderate
292.3Moderate
302.3Moderate
312.3Moderate
Planning a trip in December

Hazard calendar for Dellys

In seasonPeak

In December, Dellys sits inside 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.

Rainy season
Dust
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Dellys?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.8
Sightseeing
10th-best month of the year
0.4
Beach & pool
9th-best month of the year

December is a reasonable time to visit Dellys for sightseeing.

What to pack for Dellys in December

From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In December, Dellys sees daytime highs around 16°C and nights near 13°C. Worth packing: a warm layer, rain gear and a windbreaker. About 12 days see rain.

a warm layerrain geara windbreaker

Sea temperature near Dellys in December

The nearest coast averages about 17°C in December — 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.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar15Cool
Apr16Cool
May18Cool
Jun21Refreshing
Jul24Refreshing
Aug25Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec17Cool

UV index in Dellys in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 2. 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 16UV 9Dec 20UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar6High
Apr8Very high
May7Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep7High
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Dellys in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December 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).

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorUnhealthyPoorAug 1063 µg/m³Nov 1844 µg/m³
PM2.5 (µg/m³)Level
Jan47Poor
Feb53Poor
Mar59Unhealthy
Apr57Unhealthy
May55Poor
Jun51Poor
Jul63Unhealthy
Aug64Unhealthy
Sep47Poor
Oct55Unhealthy
Nov43Poor
Dec50Poor
Location & terrain

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.

3 km
374 m
16 km
890 m
80 km
2,266 m
treesshrubsgrasslandcroplandartificial surfaceswater
December weather nearby: Tadmaït 19 km · Makouda 20 km · Naciria 20 km · Draa Ben Khedda 21 km · Boudjima 25 km · Tizi Ouzou 26 km · Bordj Menaïel 26 km · Tirmitine 30 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
Muslim 99%

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. 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).