Climate and average weather in In Salah
In In Salah, the summers are sweltering, dry, and clear and the winters are mild and clear.
Over the course of the year, the temperature in In Salah typically varies from 7°C to 45°C, and is rarely below 3°C or above 47°C. July is the hottest month of the year, while January is the coldest.
Based on the travel score, the best times of year to visit In Salah for warm-weather activities are from early January to late March and early November to late December.
- Hottest
- Jul
- 45°
- Coldest
- Jan
- 7°
- Wettest
- Jan
- 2 mm
- Driest
- Jul
- 0 mm
- Rain / yr
- 12 mm
- 3 wet days
- Daylight
- 10.3–13.7 h
- shortest–longest
- Elevation
- 293 m
- 27.2°N
- Clearest
- Jul
- 8% cloud
In Salah weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around early January to late March.
Temperature through the year
Daily average highs and lows in In Salah, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 4.2 months, from May 21 to September 25, with daily high temperatures above 39°C. The hottest month of the year in In Salah is July, with an average high of 45°C and low of 30°C.
The cool season lasts 3.2 months, from November 22 to February 25, with daily high temperatures below 25°C. The coldest month of the year in In Salah is January, with an average low of 7°C and high of 21°C.
Days typically run about 14°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 21 | 24 | 28 | 33 | 38 | 43 | 45 | 44 | 40 | 34 | 27 | 22 |
| Avg low (°C) | 7 | 10 | 14 | 18 | 24 | 28 | 30 | 30 | 27 | 21 | 13 | 9 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 21 | 7 |
| Feb | 24 | 10 |
| Mar | 28 | 14 |
| Apr | 33 | 18 |
| May | 38 | 24 |
| Jun | 43 | 28 |
| Jul | 45 | 30 |
| Aug | 44 | 30 |
| Sep | 40 | 27 |
| Oct | 34 | 21 |
| Nov | 27 | 13 |
| Dec | 22 | 9 |
How hot and cold In Salah really feels
The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.
On the hottest afternoons, once humidity is folded in, In Salah feels like about 45°C (around July 8). About 203 days a year carry some heat stress, and 126 of them tip into dangerous heat (feels-like above 39°C), peaking in July.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | 21 | 24 | 28 | 33 | 38 | 43 | 45 | 44 | 40 | 34 | 27 | 22 |
| Air high (°C) | 21 | 24 | 28 | 33 | 38 | 43 | 45 | 44 | 40 | 34 | 27 | 22 |
| Feels-like low (°C) | 4 | 8 | 14 | 18 | 24 | 28 | 30 | 30 | 27 | 21 | 13 | 6 |
| Air low (°C) | 7 | 10 | 14 | 18 | 24 | 28 | 30 | 30 | 27 | 21 | 13 | 9 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 21 | 21 | 4 | 7 |
| Feb | 24 | 24 | 8 | 10 |
| Mar | 28 | 28 | 14 | 14 |
| Apr | 33 | 33 | 18 | 18 |
| May | 38 | 38 | 24 | 24 |
| Jun | 43 | 43 | 28 | 28 |
| Jul | 45 | 45 | 30 | 30 |
| Aug | 44 | 44 | 30 | 30 |
| Sep | 40 | 40 | 27 | 27 |
| Oct | 34 | 34 | 21 | 21 |
| Nov | 27 | 27 | 13 | 13 |
| Dec | 22 | 22 | 6 | 9 |
Average hourly temperature in In Salah
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on July afternoons, near 45°C, and coldest before dawn in January, near 7°C.
In Salah weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 21° / 7° | 2 | 0.4 | 10.5 | 8.7 |
| Feb | 24° / 10° | 1 | 0.4 | 11 | 9.1 |
| Mar | 28° / 14° | 2 | 0.4 | 11.8 | 7.8 |
| Apr | 33° / 18° | 2 | 0.4 | 12.6 | 4.4 |
| May | 38° / 24° | 1 | 0.1 | 13.3 | 1.3 |
| Jun | 43° / 28° | 0 | 0 | 13.7 | 0.0 |
| Jul | 45° / 30° | 0 | 0 | 13.5 | 0.0 |
| Aug | 44° / 30° | 0 | 0 | 13 | 0.0 |
| Sep | 40° / 27° | 1 | 0.1 | 12.2 | 0.3 |
| Oct | 34° / 21° | 1 | 0.4 | 11.3 | 3.8 |
| Nov | 27° / 13° | 1 | 0.3 | 10.7 | 8.4 |
| Dec | 22° / 9° | 2 | 0.3 | 10.3 | 8.9 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
In Salah gets about 12 mm of precipitation a year. On a typical day the chance of rain is mostly dry, and that barely changes with the seasons — rain is spread fairly evenly through the year.
January is the wettest month by volume, with 2 mm over about 0 wet days; July is the driest, with 0 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 |
| Rain days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 1 | 0 |
| Feb | 1 | 0 |
| Mar | 1 | 0 |
| Apr | 1 | 0 |
| May | 0 | 0 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 1 | 0 |
| Oct | 1 | 0 |
| Nov | 1 | 0 |
| Dec | 1 | 0 |
Monthly rainfall
Over a full year, In Salah collects about 12 mm of rain across 3 wet days — roughly 1 mm in an average month.
It doesn’t fall evenly. January is the wettest month with 2 mm, while July is the driest at just 0 mm. The three wettest months alone bring about 46% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 2 | 1 | 2 | 2 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 2 |
| Rain days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 2 | 0 |
| Feb | 1 | 0 |
| Mar | 2 | 0 |
| Apr | 2 | 0 |
| May | 1 | 0 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 1 | 0 |
| Oct | 1 | 0 |
| Nov | 1 | 0 |
| Dec | 2 | 0 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In In Salah, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.
The clearer part of the year begins around June 6 and lasts for 3.5 months, ending around September 21. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 99% of the time on average.
The cloudier part of the year begins around December 31 and lasts for 5.2 months, ending around June 5. The cloudiest month is April, when it is overcast or mostly cloudy 21% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 86 | 84 | 85 | 79 | 80 | 92 | 99 | 98 | 90 | 82 | 81 | 83 |
| Cloudier (%) | 14 | 16 | 15 | 21 | 20 | 8 | 1 | 2 | 10 | 18 | 19 | 17 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 86 | 14 |
| Feb | 84 | 16 |
| Mar | 85 | 15 |
| Apr | 79 | 21 |
| May | 80 | 20 |
| Jun | 92 | 8 |
| Jul | 99 | 1 |
| Aug | 98 | 2 |
| Sep | 90 | 10 |
| Oct | 82 | 18 |
| Nov | 81 | 19 |
| Dec | 83 | 17 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around June 8, brings about 13 h 42 min of light; the shortest, around January 1, only 10 h 18 min — a swing of roughly 3 h 24 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 10.5 | 11.0 | 11.8 | 12.6 | 13.3 | 13.7 | 13.5 | 13.0 | 12.2 | 11.3 | 10.7 | 10.3 |
| Sunrise (AM) | 7:46 | 7:33 | 7:06 | 6:31 | 6:06 | 5:59 | 6:09 | 6:25 | 6:40 | 6:55 | 7:16 | 7:37 |
| Sunset (PM) | 6:13 | 6:36 | 6:54 | 7:10 | 7:26 | 7:41 | 7:43 | 7:23 | 6:49 | 6:15 | 5:54 | 5:55 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 10.5 | 7:46 | 6:13 |
| Feb | 11.0 | 7:33 | 6:36 |
| Mar | 11.8 | 7:06 | 6:54 |
| Apr | 12.6 | 6:31 | 7:10 |
| May | 13.3 | 6:06 | 7:26 |
| Jun | 13.7 | 5:59 | 7:41 |
| Jul | 13.5 | 6:09 | 7:43 |
| Aug | 13.0 | 6:25 | 7:23 |
| Sep | 12.2 | 6:40 | 6:49 |
| Oct | 11.3 | 6:55 | 6:15 |
| Nov | 10.7 | 7:16 | 5:54 |
| Dec | 10.3 | 7:37 | 5:55 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
In Salah averages about 24 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 21 and 29 days.
The sunnier stretch runs 3.5 months, from around Jun 5 to Sep 18. The sunniest month is July, with roughly 29 sunny days (brilliant).
The greyest month is April, down near 21 sunny days — about 26% fewer than the July peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 25 | 21 | 24 | 21 | 22 | 26 | 30 | 29 | 25 | 22 | 21 | 23 |
| Sky | Brilliant | Bright | Brilliant | Bright | Bright | Brilliant | Brilliant | Brilliant | Brilliant | Bright | Bright | Bright |
| Sunny days | Sky | |
|---|---|---|
| Jan | 25 | Brilliant |
| Feb | 21 | Bright |
| Mar | 24 | Brilliant |
| Apr | 21 | Bright |
| May | 22 | Bright |
| Jun | 26 | Brilliant |
| Jul | 30 | Brilliant |
| Aug | 29 | Brilliant |
| Sep | 25 | Brilliant |
| Oct | 22 | Bright |
| Nov | 21 | Bright |
| Dec | 23 | Bright |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In In Salah, the air stays dry or comfortable essentially all year. Even in September, the muggiest month, it feels humid or worse only about 1% of the time — humidity is not something you need to plan around here.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 99 | 99 | 100 | 100 | 98 | 94 | 97 | 100 | 100 |
| Comfortable (%) | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 2 | 5 | 2 | 0 | 0 |
| Humid (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| Jan | 100 | 0 | 0 |
| Feb | 100 | 0 | 0 |
| Mar | 100 | 0 | 0 |
| Apr | 99 | 1 | 0 |
| May | 99 | 1 | 0 |
| Jun | 100 | 0 | 0 |
| Jul | 100 | 0 | 0 |
| Aug | 98 | 2 | 0 |
| Sep | 94 | 5 | 1 |
| Oct | 97 | 2 | 1 |
| Nov | 100 | 0 | 0 |
| Dec | 100 | 0 | 0 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Across the year, average wind speed in In Salah is typically light breeze, near 18 km/h, and varies little with the seasons.
The windier part of the year lasts 2.7 months, from around Jun 13 to Sep 2. The windiest month is July, averaging about 21 km/h (breezy).
The calmer part of the year runs from around Sep 3 to Mar 7, with November the calmest month at about 17 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 18 | 18 | 19 | 19 | 19 | 19 | 21 | 20 | 18 | 18 | 17 | 18 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | breezy | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 18 | light breeze |
| Feb | 18 | light breeze |
| Mar | 19 | light breeze |
| Apr | 19 | light breeze |
| May | 19 | light breeze |
| Jun | 19 | light breeze |
| Jul | 21 | breezy |
| Aug | 20 | light breeze |
| Sep | 18 | light breeze |
| Oct | 18 | light breeze |
| Nov | 17 | light breeze |
| Dec | 18 | light breeze |
Hazard calendar for In Salah
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
In Salah sees seasonal dust haze (February–October), heaviest in June.
Best time to visit In Salah
To characterize how pleasant the weather is in In Salah throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around mid January, In Salah is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit In Salah for general outdoor tourist activities is from early November to late March, with a peak score in the third week of February.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 8.7 | 9.1 | 7.8 | 4.4 | 1.3 | 0.0 | 0.0 | 0.0 | 0.4 | 3.9 | 8.3 | 8.9 |
| Rating | ideal | ideal | ideal | fair | poor | poor | poor | poor | poor | fair | ideal | ideal |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 8.7 | ideal |
| Feb | 9.1 | ideal |
| Mar | 7.8 | ideal |
| Apr | 4.4 | fair |
| May | 1.3 | poor |
| Jun | 0.0 | poor |
| Jul | 0.0 | poor |
| Aug | 0.0 | poor |
| Sep | 0.4 | poor |
| Oct | 3.9 | fair |
| Nov | 8.3 | ideal |
| Dec | 8.9 | ideal |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best times of year to visit In Salah for hot-weather activities run from mid February to late April and again from mid October to late November, with a peak score in the third week of March.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for In Salah, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
For a warm-season trip around July (highs near 45°C), the essentials are light clothes, sun protection and a windbreaker. In the cold season around January (highs near 21°C), pack a warm layer.
In July, In Salah sees daytime highs around 45°C and nights near 30°C. Pack light clothes and sun protection. Worth having: a windbreaker.
UV index (midday) in In Salah by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
Under clear skies, the midday UV index in In Salah peaks around July 12 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 5 | 7 | 9 | 9 | 10 | 10 | 11 | 8 | 10 | 7 | 5 | 4 |
| Level | High | High | Very high | Very high | Extreme | Very high | Extreme | Very high | Very high | High | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 5 | High |
| Feb | 7 | High |
| Mar | 9 | Very high |
| Apr | 9 | Very high |
| May | 10 | Extreme |
| Jun | 10 | Very high |
| Jul | 11 | Extreme |
| Aug | 8 | Very high |
| Sep | 10 | Very high |
| Oct | 7 | High |
| Nov | 5 | High |
| Dec | 4 | Moderate |
Average hourly UV index in In Salah
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in July the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 6 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 5 | 6 | 7 | 7.5 | 8 | 8 | 8.5 | 7.5 | 7.5 | 6 | 5 | 4 |
| UV ≥ 6 (h/day) | 0 | 2 | 4.5 | 4.5 | 5.5 | 5.5 | 6 | 4.5 | 5 | 2.5 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 5 | 0 |
| Feb | 6 | 2 |
| Mar | 7 | 4.5 |
| Apr | 7.5 | 4.5 |
| May | 8 | 5.5 |
| Jun | 8 | 5.5 |
| Jul | 8.5 | 6 |
| Aug | 7.5 | 4.5 |
| Sep | 7.5 | 5 |
| Oct | 6 | 2.5 |
| Nov | 5 | 0 |
| Dec | 4 | 0 |
Air quality in In Salah by month
Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly average.
Air quality in In Salah is worst in July — around 106 µg/m³ PM2.5 (unhealthy), about 1.7× the cleanest month (November, 64 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 80 | 104 | 93 | 97 | 103 | 91 | 106 | 93 | 87 | 87 | 64 | 92 |
| Level | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 80 | Unhealthy |
| Feb | 104 | Unhealthy |
| Mar | 93 | Unhealthy |
| Apr | 97 | Unhealthy |
| May | 103 | Unhealthy |
| Jun | 91 | Unhealthy |
| Jul | 106 | Unhealthy |
| Aug | 93 | Unhealthy |
| Sep | 87 | Unhealthy |
| Oct | 87 | Unhealthy |
| Nov | 64 | Unhealthy |
| Dec | 92 | Unhealthy |
Growing season
In Salah is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 99 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Frost nights | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 99 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 100 | 0 |
| Dec | 100 | 0 |
Growing degree days
Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. In Salah banks about 5,919 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around July.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 125 | 186 | 340 | 473 | 645 | 758 | 853 | 828 | 708 | 540 | 300 | 163 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 125 |
| Feb | 186 |
| Mar | 340 |
| Apr | 473 |
| May | 645 |
| Jun | 758 |
| Jul | 853 |
| Aug | 828 |
| Sep | 708 |
| Oct | 540 |
| Nov | 300 |
| Dec | 163 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
In Salah receives about 6.3 kWh/m² a day of solar energy on average — intense — with a clear seasonal swing between 4.1 and 8.0 kWh/m².
The brighter stretch of the year lasts 6.4 months, from around Mar 13 to Sep 24. The brightest month is June, averaging about 8.0 kWh/m² (intense).
The dimmest month is December, down near 4.2 kWh/m² — roughly 48% less than the June peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.4 | 5.3 | 6.4 | 7.4 | 7.8 | 8.0 | 7.8 | 7.4 | 6.6 | 5.6 | 4.7 | 4.1 |
| Level | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 4.4 | Bright |
| Feb | 5.3 | Bright |
| Mar | 6.4 | Intense |
| Apr | 7.4 | Intense |
| May | 7.8 | Intense |
| Jun | 8.0 | Intense |
| Jul | 7.8 | Intense |
| Aug | 7.4 | Intense |
| Sep | 6.6 | Intense |
| Oct | 5.6 | Bright |
| Nov | 4.7 | Bright |
| Dec | 4.1 | Bright |
Where is In Salah?
In Salah sits at 27.2°N, 2.5°E, 293 m above sea level, in Algeria. The nearest listed city is Aoulef, 141 km away.
Topography around In Salah
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of In Salah.
Within 3 km, the terrain around In Salah has only modest variations in elevation — a maximum elevation change of 37 m around an average of 283 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 166 m; within 80 km, significant variations in elevation — a maximum elevation change of 519 m.
The land around In Salah is covered by bare terrain (76%) within 3 km, bare terrain (96%) within 16 km, and bare terrain (100%) 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 In Salah (27.1968°, 2.4791°, elevation 293 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. 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).