Tassili n'Ajjer weather in December

December in Tassili n'Ajjer: nice, dry, with poor air quality — fine if you can take poor air.

Updated September 2026 · climate normals from ERA5 reanalysis

Tassili n'Ajjer🇩🇿 Algeria · Maghreb · National park90
  1. 88Jan
  2. 93Feb
  3. 79Mar
  4. 64Apr
  5. 52May
  6. 41Jun
  7. 35Jul
  8. 38Aug
  9. 50Sep
  10. 74Oct
  11. 85Nov
  12. 90Dec

#2 of 12 months in Tassili n'Ajjer · #111 of 1413 destinations to visit in December · comfort 90/100 (tier S)

Days
21°C
Nights
9°C
Wet days
0
Sun
9.9 h
Humidity
32%
Daylight
11 h
Tassili n'Ajjer, Algeria
Photo: magharebia · CC BY 2.0

Traveller notes on Tassili n'Ajjer in December

Other months in Tassili n'Ajjer

Tassili n'Ajjer-forum threads on a February visit describe December through February as genuinely peak season, posters naming daytime temperatures in the low twenties as comfortable for hiking the plateau. Regulars call sandstorm risk genuinely rising from February onward, several posters naming this a reason to book early rather than wait for spring. Posters call independent travel genuinely barred for non-Algerians, several regulars naming a licensed guide as mandatory here. Regulars call the Tassili plateau and the Tadrart Rouge the two standard areas covered, several threads naming donkey or camel access to rock art sites like Sefar versus a roughly three-hour drive south toward the Tadrart near the Libyan border. Posters recommend booking through an established operator well ahead, several regulars calling this standard given how limited access options are. The record: 20.8C days, 7.7C nights, effectively no measurable precipitation and 23 percent humidity.
TassiliNAjjerFebruaryRegular · February · 2 days ago · Read more on Tripadvisor ↗
Tassili n'Ajjer-forum threads describe October through April as genuinely the recommended window here, posters naming this stretch as when temperatures stay considerably more manageable than brutal summer extremes. Regulars call an early spring visit genuinely comfortable, one poster describing daytime highs in the mid-twenties and nighttime lows in the low teens as extremely pleasant conditions. Posters call April genuinely still within this favorable window, several regulars naming this the reason spring remains a popular time for the demanding trek into the plateau. Regulars call a licensed guide genuinely mandatory for any visit, several threads naming this standard given how remote and logistically complex the region is. Posters recommend arranging permits and a guide well ahead, several regulars calling this essential given how limited independent access is. The record: 31.5C days, 18.9C nights, effectively no measurable precipitation and 14 percent humidity.
TassiliNAjjerAprilRegular · April · 2 days ago · Read more on Tripadvisor ↗
Tassili n'Ajjer-forum threads describe two genuinely distinct sub-regions here, posters distinguishing the Tadrart Rouge desert area from the plateau northeast of Djanet as requiring separate planning. Regulars call three to four full days a real minimum for the Tadrart alone, several posters naming this the reason a proper visit needs real time built in. Posters call September through May genuinely the recommended window, several regulars naming this considerably milder than the brutal summer heat that makes June through August a month to avoid. Regulars call September specifically a real transition point, several threads naming this when conditions start easing from peak summer extremes toward more comfortable months. Posters recommend arranging a licensed guide well before arrival, several regulars calling this standard given how remote and logistically demanding the region is. The record: 34.6C days, 22.8C nights, effectively no measurable precipitation and 19 percent humidity.
TassiliNAjjerSeptemberRegular · September · 2 days ago · Read more on Tripadvisor ↗
Tassili n'Ajjer-forum threads describe June as genuinely a month to avoid here, posters naming October-April the recommended window and June specifically flagged for brutal daytime readings. Regulars call the plateau itself several degrees cooler than the surrounding lowlands even in June, several posters noting the elevation offers only modest real relief from the broader Saharan heat. Posters call independent travel here genuinely impossible for non-Algerians, several regulars confirming an official guide is required for any June visit despite conditions. Regulars call trekking genuinely brutal once real summer heat sets in, several threads warning this season turns a normally rewarding walk into a serious physical test. Posters recommend postponing to autumn or spring instead, several regulars calling this the honest advice for anyone asking about summer here. The record: 36.4C days, 25C nights, effectively no measurable precipitation and 15 percent humidity.
TassiliNAjjerJuneRegular · June · 2 days ago · Read more on Tripadvisor ↗

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Tassili n'Ajjer climate normals — December

Daytime high21°C / 70°F😎 nice
Nighttime low9°C / 47°F
Rainfall0 mm / 0 in☀️ dry
Rainy days0 days
Humidity32%🌵 dry
Dew point-3°C / 26°F
Sunshine9.9 h/day
Daylight10.6 h
Wind19 km/h / 11 mph
Air quality (US AQI)101😷 poor

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Tassili n'Ajjer in December

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

Busyschool holidays in 5 of the markets that fill it, one of its best months for weather(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Tassili n'Ajjer's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Best weatherTassili n'Ajjer's weather peaks December–February.

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Best weatherFair weatherToughest weather

Where is Tassili n'Ajjer?

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Tassili n'Ajjer in December — FAQ

Is December a good time to visit Tassili n'Ajjer?
December in Tassili n'Ajjer: nice, dry, with poor air quality — fine if you can take poor air. It ranks #2 of 12 months for Tassili n'Ajjer on SeasonMap's comfort score (90/100).
What is the weather like in Tassili n'Ajjer in December?
In December, Tassili n'Ajjer averages a daily high of 21.2°C and a low of 8.5°C, with about 0.2 mm of rain over roughly 0 rainy days.
What is the air quality in Tassili n'Ajjer in December?
Tassili n'Ajjer has a mean US Air Quality Index of about 101 in December.