Climate and average weather in Aley
In Aley, the summers are humid, hot, dry, and clear and the winters are cool and mostly clear.
Over the course of the year, the temperature in Aley typically varies from 6°C to 31°C, and is rarely below 2°C or above 33°C. August is the hottest month of the year, while January is the coldest.
Based on the travel score, the best times of year to visit Aley for warm-weather activities are from early April to mid July and early September to late November.
- Hottest
- Aug
- 31°
- Coldest
- Jan
- 6°
- Wettest
- Jan
- 123 mm
- Driest
- Jul
- 1 mm
- Rain / yr
- 608 mm
- 69 wet days
- Daylight
- 9.7–14.3 h
- shortest–longest
- Elevation
- 878 m
- 33.8°N
- Clearest
- Jul
- 6% cloud
Aley is town in Lebanon.
- Density
- 15,222/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Aley 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 April to mid July.
Temperature through the year
Daily average highs and lows in Aley, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 4.7 months, from May 29 to October 19, with daily high temperatures above 26°C. The hottest month of the year in Aley is August, with an average high of 31°C and low of 22°C.
The cool season lasts 3.4 months, from December 8 to March 19, with daily high temperatures below 18°C. The coldest month of the year in Aley is January, with an average low of 6°C and high of 15°C.
Days typically run about 9°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 15 | 15 | 18 | 21 | 25 | 28 | 30 | 31 | 29 | 27 | 22 | 17 |
| Avg low (°C) | 6 | 7 | 9 | 12 | 15 | 19 | 21 | 22 | 20 | 17 | 12 | 8 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 15 | 6 |
| Feb | 15 | 7 |
| Mar | 18 | 9 |
| Apr | 21 | 12 |
| May | 25 | 15 |
| Jun | 28 | 19 |
| Jul | 30 | 21 |
| Aug | 31 | 22 |
| Sep | 29 | 20 |
| Oct | 27 | 17 |
| Nov | 22 | 12 |
| Dec | 17 | 8 |
Average hourly temperature in Aley
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 August afternoons, near 31°C, and coldest before dawn in January, near 6°C.
Aley 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 | 15° / 6° | 123 | 12.7 | 10 | 4.3 |
| Feb | 15° / 7° | 121 | 11.2 | 10.7 | 4.7 |
| Mar | 18° / 9° | 94 | 9.8 | 11.7 | 6.0 |
| Apr | 21° / 12° | 46 | 6.3 | 12.8 | 7.4 |
| May | 25° / 15° | 18 | 3.4 | 13.7 | 8.5 |
| Jun | 28° / 19° | 3 | 0.9 | 14.2 | 8.2 |
| Jul | 30° / 21° | 1 | 0.2 | 14 | 6.9 |
| Aug | 31° / 22° | 1 | 0.3 | 13.3 | 6.6 |
| Sep | 29° / 20° | 6 | 1.3 | 12.2 | 7.2 |
| Oct | 27° / 17° | 26 | 4.8 | 11.1 | 7.9 |
| Nov | 22° / 12° | 65 | 7.6 | 10.2 | 7.4 |
| Dec | 17° / 8° | 105 | 10.4 | 9.8 | 5.5 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Aley gets about 608 mm of precipitation a year. On a typical day the chance of rain is some rain, but that rises and falls sharply with the seasons.
The wetter season lasts 6.0 months, from around Oct 22 to Apr 22, peaking in February at about 42% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 22.
January is the wettest month by volume, with 123 mm over about 13 wet days; July is the driest, with 1 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 39 | 40 | 32 | 21 | 11 | 3 | 1 | 1 | 4 | 16 | 25 | 34 |
| Rain days | 13 | 11 | 10 | 6 | 3 | 1 | 0 | 0 | 1 | 5 | 8 | 10 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 39 | 13 |
| Feb | 40 | 11 |
| Mar | 32 | 10 |
| Apr | 21 | 6 |
| May | 11 | 3 |
| Jun | 3 | 1 |
| Jul | 1 | 0 |
| Aug | 1 | 0 |
| Sep | 4 | 1 |
| Oct | 16 | 5 |
| Nov | 25 | 8 |
| Dec | 34 | 10 |
Monthly rainfall
Over a full year, Aley collects about 608 mm of rain across 69 wet days — roughly 51 mm in an average month.
It doesn’t fall evenly. January is the wettest month with 123 mm, while July is the driest at just 1 mm. The three wettest months alone bring about 57% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 123 | 121 | 94 | 46 | 18 | 3 | 1 | 1 | 6 | 26 | 65 | 105 |
| Rain days | 13 | 11 | 10 | 6 | 3 | 1 | 0 | 0 | 1 | 5 | 8 | 10 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 123 | 13 |
| Feb | 121 | 11 |
| Mar | 94 | 10 |
| Apr | 46 | 6 |
| May | 18 | 3 |
| Jun | 3 | 1 |
| Jul | 1 | 0 |
| Aug | 1 | 0 |
| Sep | 6 | 1 |
| Oct | 26 | 5 |
| Nov | 65 | 8 |
| Dec | 105 | 10 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Aley, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.
The clearer part of the year begins around May 9 and lasts for 5.7 months, ending around October 30. 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 October 31 and lasts for 6.2 months, ending around May 8. The cloudiest month is February, when it is overcast or mostly cloudy 37% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 64 | 63 | 66 | 72 | 86 | 98 | 99 | 99 | 99 | 88 | 76 | 67 |
| Cloudier (%) | 36 | 37 | 34 | 28 | 14 | 2 | 1 | 1 | 1 | 12 | 24 | 33 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 64 | 36 |
| Feb | 63 | 37 |
| Mar | 66 | 34 |
| Apr | 72 | 28 |
| May | 86 | 14 |
| Jun | 98 | 2 |
| Jul | 99 | 1 |
| Aug | 99 | 1 |
| Sep | 99 | 1 |
| Oct | 88 | 12 |
| Nov | 76 | 24 |
| Dec | 67 | 33 |
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 22, brings about 14 h 18 min of light; the shortest, around December 22, only 9 h 42 min — a swing of roughly 4 h 36 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 10.0 | 10.7 | 11.7 | 12.8 | 13.7 | 14.2 | 14.0 | 13.3 | 12.2 | 11.1 | 10.2 | 9.8 |
| Sunrise (AM) | 6:47 | 6:30 | 5:55 | 5:13 | 4:41 | 4:31 | 4:42 | 5:04 | 5:26 | 5:48 | 6:16 | 6:41 |
| Sunset (PM) | 4:46 | 5:15 | 5:39 | 6:03 | 6:26 | 6:45 | 6:45 | 6:20 | 5:38 | 4:57 | 4:29 | 4:27 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 10.0 | 6:47 | 4:46 |
| Feb | 10.7 | 6:30 | 5:15 |
| Mar | 11.7 | 5:55 | 5:39 |
| Apr | 12.8 | 5:13 | 6:03 |
| May | 13.7 | 4:41 | 6:26 |
| Jun | 14.2 | 4:31 | 6:45 |
| Jul | 14.0 | 4:42 | 6:45 |
| Aug | 13.3 | 5:04 | 6:20 |
| Sep | 12.2 | 5:26 | 5:38 |
| Oct | 11.1 | 5:48 | 4:57 |
| Nov | 10.2 | 6:16 | 4:29 |
| Dec | 9.8 | 6:41 | 4:27 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Aley averages about 21 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 12 and 30 days.
The sunnier stretch runs 5.6 months, from around May 10 to Oct 26. The sunniest month is July, with roughly 29 sunny days (brilliant).
The greyest month is February, down near 12 sunny days — about 57% fewer than the July peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 14 | 11 | 13 | 16 | 23 | 28 | 30 | 30 | 28 | 23 | 18 | 15 |
| Sky | Mixed | Mixed | Mixed | Bright | Bright | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Bright | Mixed |
| Sunny days | Sky | |
|---|---|---|
| Jan | 14 | Mixed |
| Feb | 11 | Mixed |
| Mar | 13 | Mixed |
| Apr | 16 | Bright |
| May | 23 | Bright |
| Jun | 28 | Brilliant |
| Jul | 30 | Brilliant |
| Aug | 30 | Brilliant |
| Sep | 28 | Brilliant |
| Oct | 23 | Brilliant |
| Nov | 18 | Bright |
| Dec | 15 | Mixed |
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 Aley, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 4.3 months, from around June 7 to October 14. The muggiest month is August, when the air feels humid, muggy or worse about 97% of the time.
The most comfortable stretch runs from around October 15 to June 6, and March is the most comfortable month — the air is dry or comfortable 100% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 99 | 93 | 58 | 13 | 2 | 0 | 5 | 35 | 88 | 100 |
| Comfortable (%) | 0 | 0 | 1 | 7 | 35 | 39 | 10 | 3 | 18 | 38 | 11 | 0 |
| Humid (%) | 0 | 0 | 0 | 0 | 6 | 40 | 43 | 28 | 45 | 23 | 1 | 0 |
| Muggy (%) | 0 | 0 | 0 | 0 | 0 | 8 | 41 | 57 | 28 | 4 | 0 | 0 |
| Oppressive (%) | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 11 | 5 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| Jan | 100 | 0 | 0 | 0 | 0 |
| Feb | 100 | 0 | 0 | 0 | 0 |
| Mar | 99 | 1 | 0 | 0 | 0 |
| Apr | 93 | 7 | 0 | 0 | 0 |
| May | 58 | 35 | 6 | 0 | 0 |
| Jun | 13 | 39 | 40 | 8 | 0 |
| Jul | 2 | 10 | 43 | 41 | 5 |
| Aug | 0 | 3 | 28 | 57 | 11 |
| Sep | 5 | 18 | 45 | 28 | 5 |
| Oct | 35 | 38 | 23 | 4 | 0 |
| Nov | 88 | 11 | 1 | 0 | 0 |
| Dec | 100 | 0 | 0 | 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.
Wind in Aley is steady company: average speeds sit near 8 km/h — calm — in every month of the year, with no meaningful windy or calm season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 9 | 9 | 9 | 8 | 8 | 7 | 8 | 7 | 7 | 7 | 7 | 8 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 9 | calm |
| Feb | 9 | calm |
| Mar | 9 | calm |
| Apr | 8 | calm |
| May | 8 | calm |
| Jun | 7 | calm |
| Jul | 8 | calm |
| Aug | 7 | calm |
| Sep | 7 | calm |
| Oct | 7 | calm |
| Nov | 7 | calm |
| Dec | 8 | calm |
Hazard calendar for Aley
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Aley's rainy season runs November–March, when most of the year's rain falls.
Best time to visit Aley
To characterize how pleasant the weather is in Aley throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around early July, Aley is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.
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 times of year to visit Aley for general outdoor tourist activities run from early April to mid July and again from early September to late November, with a peak score in the last week of May.
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) | 4.4 | 4.7 | 6.0 | 7.4 | 8.5 | 8.2 | 6.9 | 6.6 | 7.2 | 7.9 | 7.4 | 5.5 |
| Rating | fair | fair | good | good | ideal | ideal | good | good | good | ideal | good | good |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 4.4 | fair |
| Feb | 4.7 | fair |
| Mar | 6.0 | good |
| Apr | 7.4 | good |
| May | 8.5 | ideal |
| Jun | 8.2 | ideal |
| Jul | 6.9 | good |
| Aug | 6.6 | good |
| Sep | 7.2 | good |
| Oct | 7.9 | ideal |
| Nov | 7.4 | good |
| Dec | 5.5 | good |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Aley for hot-weather activities is from mid May to late October, with a peak score in the last week of June.
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 Aley, 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 August (highs near 31°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 15°C), pack a warm layer and rain gear.
In August, Aley sees daytime highs around 31°C and nights near 22°C. Pack light clothes and sun protection.
Sea temperature near Aley
Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.
The sea at the nearest coast (about 22 km away) is warmest in August at about 28°C and coldest in March near 17°C.
It's comfortable for a long swim from May 3 to Dec 23 — about 7.7 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 18 | 18 | 17 | 19 | 21 | 25 | 27 | 28 | 28 | 26 | 23 | 21 |
| Comfort | Cool | Cool | Cool | Cool | Refreshing | Warm | Warm | Tropical | Warm | Warm | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 18 | Cool |
| Feb | 18 | Cool |
| Mar | 17 | Cool |
| Apr | 19 | Cool |
| May | 21 | Refreshing |
| Jun | 25 | Warm |
| Jul | 27 | Warm |
| Aug | 28 | Tropical |
| Sep | 28 | Warm |
| Oct | 26 | Warm |
| Nov | 23 | Refreshing |
| Dec | 21 | Refreshing |
UV index (midday) in Aley 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 Aley peaks around June 21 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 4 | 5 | 7 | 8 | 11 | 10 | 10 | 8 | 6 | 4 | 3 |
| Level | Moderate | Moderate | Moderate | High | Very high | Extreme | Very high | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 4 | Moderate |
| Mar | 5 | Moderate |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 11 | Extreme |
| Jul | 10 | Very high |
| Aug | 10 | Very high |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Average hourly UV index in Aley
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 June 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) | 0 | 2.5 | 5 | 6.5 | 7.5 | 8.5 | 8.5 | 8 | 7 | 5.5 | 3.5 | 0 |
| UV ≥ 6 (h/day) | 0 | 0 | 0 | 2.5 | 4.5 | 6 | 6 | 5.5 | 4 | 0 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 0 | 0 |
| Feb | 2.5 | 0 |
| Mar | 5 | 0 |
| Apr | 6.5 | 2.5 |
| May | 7.5 | 4.5 |
| Jun | 8.5 | 6 |
| Jul | 8.5 | 6 |
| Aug | 8 | 5.5 |
| Sep | 7 | 4 |
| Oct | 5.5 | 0 |
| Nov | 3.5 | 0 |
| Dec | 0 | 0 |
Air quality in Aley 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 Aley is worst in April — around 45 µg/m³ PM2.5 (poor), about 2.4× the cleanest month (August, 19 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) | 28 | 34 | 39 | 45 | 38 | 28 | 21 | 19 | 20 | 23 | 28 | 26 |
| Level | Moderate | Moderate | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 28 | Moderate |
| Feb | 34 | Moderate |
| Mar | 39 | Poor |
| Apr | 45 | Poor |
| May | 38 | Poor |
| Jun | 28 | Moderate |
| Jul | 21 | Moderate |
| Aug | 19 | Moderate |
| Sep | 20 | Moderate |
| Oct | 23 | Moderate |
| Nov | 28 | Moderate |
| Dec | 26 | Moderate |
Growing season
Aley 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 | 99 | 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 | 99 | 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. Aley banks about 3,130 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around August.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 14 | 32 | 100 | 191 | 318 | 407 | 487 | 501 | 441 | 363 | 200 | 75 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 14 |
| Feb | 32 |
| Mar | 100 |
| Apr | 191 |
| May | 318 |
| Jun | 407 |
| Jul | 487 |
| Aug | 501 |
| Sep | 441 |
| Oct | 363 |
| Nov | 200 |
| Dec | 75 |
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.
Aley receives about 5.4 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.6 and 7.8 kWh/m².
The brighter stretch of the year lasts 6.2 months, from around Mar 23 to Sep 27. The brightest month is June, averaging about 7.8 kWh/m² (intense).
The dimmest month is December, down near 2.6 kWh/m² — roughly 66% less than the June peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 2.9 | 3.8 | 5.1 | 6.4 | 7.3 | 7.8 | 7.7 | 7.0 | 5.9 | 4.5 | 3.3 | 2.6 |
| Level | Moderate | Moderate | Bright | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 2.9 | Moderate |
| Feb | 3.8 | Moderate |
| Mar | 5.1 | Bright |
| Apr | 6.4 | Intense |
| May | 7.3 | Intense |
| Jun | 7.8 | Intense |
| Jul | 7.7 | Intense |
| Aug | 7.0 | Intense |
| Sep | 5.9 | Bright |
| Oct | 4.5 | Bright |
| Nov | 3.3 | Moderate |
| Dec | 2.6 | Moderate |
Where is Aley?
Aley sits at 33.8°N, 35.6°E, 878 m above sea level, in Lebanon. The nearest listed city is Beirut, 13 km away.
Topography around Aley
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Aley.
Within 3 km, the terrain around Aley has large variations in elevation — a maximum elevation change of 838 m around an average of 718 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,945 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,079 m.
The land around Aley is covered by trees (53%) and artificial surfaces (22%) within 3 km, trees (47%) within 16 km, and grassland (38%) and water (29%) within 80 km.
Lebanon travel facts
- Travel advisory
- Level 4
- Do Not Travel
- Power plugs
- Type A / B / C / D / G
- 220 V · 50 Hz
- Prices
- ≈ 38% of US
- price level, 2024
- GDP per capita
- $4,473
- 2024
- Happiness
- 3.7 / 10
- World Happiness, 2025
- Safe drinking water
- 48%
- of population, 2024
- Homicide rate
- 2.2
- per 100k, 2020
- Road deaths
- 16.4
- per 100k/yr, 2019
- Income group
- Lower middle
- World Bank
- English
- Low
- EF EPI 477
- 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 Aley (33.8053°, 35.6°, elevation 878 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).