Climate and average weather in Sa'dah
In Sa'dah, the summers are hot, dry, and mostly clear and the winters are warm and clear.
Over the course of the year, the temperature in Sa'dah typically varies from 8°C to 31°C, and is rarely below 4°C or above 33°C. June is the hottest month of the year, while January is the coldest.
Based on the travel score, the best time of year to visit Sa'dah for warm-weather activities is from late September to late March.
- Hottest
- Jun
- 31°
- Coldest
- Jan
- 8°
- Wettest
- Aug
- 56 mm
- Driest
- Nov
- 3 mm
- Rain / yr
- 225 mm
- 55 wet days
- Daylight
- 11.0–13.0 h
- shortest–longest
- Elevation
- 1,876 m
- 16.9°N
- Clearest
- Dec
- 16% cloud
Sa'dah is human settlement.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Sa'dah 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 late September to late March.
Temperature through the year
Daily average highs and lows in Sa'dah, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 4.4 months, from May 13 to September 22, with daily high temperatures above 29°C. The hottest month of the year in Sa'dah is June, with an average high of 31°C and low of 19°C.
The cool season lasts 3.1 months, from November 13 to February 14, with daily high temperatures below 24°C. The coldest month of the year in Sa'dah is January, with an average low of 8°C and high of 22°C.
Days typically run about 13°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 24 | 25 | 27 | 29 | 31 | 31 | 30 | 30 | 26 | 24 | 22 |
| Avg low (°C) | 8 | 10 | 12 | 15 | 17 | 19 | 18 | 18 | 17 | 14 | 11 | 8 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 22 | 8 |
| Feb | 24 | 10 |
| Mar | 25 | 12 |
| Apr | 27 | 15 |
| May | 29 | 17 |
| Jun | 31 | 19 |
| Jul | 31 | 18 |
| Aug | 30 | 18 |
| Sep | 30 | 17 |
| Oct | 26 | 14 |
| Nov | 24 | 11 |
| Dec | 22 | 8 |
Average hourly temperature in Sa'dah
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 June afternoons, near 31°C, and coldest before dawn in January, near 8°C.
Sa'dah 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 | 22° / 8° | 11 | 2.2 | 11.1 | 8.6 |
| Feb | 24° / 10° | 8 | 2.2 | 11.4 | 8.9 |
| Mar | 25° / 12° | 28 | 6.7 | 11.9 | 8.1 |
| Apr | 27° / 15° | 43 | 9.3 | 12.4 | 7.1 |
| May | 29° / 17° | 24 | 5.7 | 12.8 | 6.1 |
| Jun | 31° / 19° | 7 | 1.5 | 13 | 5.4 |
| Jul | 31° / 18° | 31 | 9 | 12.9 | 4.8 |
| Aug | 30° / 18° | 56 | 14.4 | 12.6 | 4.6 |
| Sep | 30° / 17° | 6 | 1.8 | 12.1 | 6.5 |
| Oct | 26° / 14° | 5 | 0.5 | 11.6 | 9.0 |
| Nov | 24° / 11° | 3 | 0.8 | 11.2 | 9.3 |
| Dec | 22° / 8° | 3 | 0.9 | 11 | 9.0 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Sa'dah gets about 225 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 2.1 months, from around Jul 5 to Sep 6, peaking in August at about 52% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Sep 28.
August is the wettest month by volume, with 56 mm over about 14 wet days; November is the driest, with 3 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 7 | 8 | 20 | 31 | 18 | 6 | 29 | 44 | 8 | 2 | 2 | 3 |
| Rain days | 2 | 2 | 7 | 9 | 6 | 2 | 9 | 14 | 2 | 1 | 1 | 1 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 7 | 2 |
| Feb | 8 | 2 |
| Mar | 20 | 7 |
| Apr | 31 | 9 |
| May | 18 | 6 |
| Jun | 6 | 2 |
| Jul | 29 | 9 |
| Aug | 44 | 14 |
| Sep | 8 | 2 |
| Oct | 2 | 1 |
| Nov | 2 | 1 |
| Dec | 3 | 1 |
Monthly rainfall
Over a full year, Sa'dah collects about 225 mm of rain across 55 wet days — roughly 19 mm in an average month.
It doesn’t fall evenly. August is the wettest month with 56 mm, while November is the driest at just 3 mm. The three wettest months alone bring about 58% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 11 | 8 | 28 | 43 | 24 | 7 | 31 | 56 | 6 | 5 | 3 | 3 |
| Rain days | 2 | 2 | 7 | 9 | 6 | 2 | 9 | 14 | 2 | 1 | 1 | 1 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 11 | 2 |
| Feb | 8 | 2 |
| Mar | 28 | 7 |
| Apr | 43 | 9 |
| May | 24 | 6 |
| Jun | 7 | 2 |
| Jul | 31 | 9 |
| Aug | 56 | 14 |
| Sep | 6 | 2 |
| Oct | 5 | 1 |
| Nov | 3 | 1 |
| Dec | 3 | 1 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Sa'dah, 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 September 12 and lasts for 7.7 months, ending around May 3. The clearest month is November, when the sky is clear, mostly clear, or partly cloudy 92% of the time on average.
The cloudier part of the year begins around May 4 and lasts for 4.3 months, ending around September 11. The cloudiest month is July, when it is overcast or mostly cloudy 49% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 88 | 90 | 89 | 85 | 79 | 72 | 51 | 66 | 84 | 91 | 92 | 92 |
| Cloudier (%) | 12 | 10 | 11 | 15 | 21 | 28 | 49 | 34 | 16 | 9 | 8 | 8 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 88 | 12 |
| Feb | 90 | 10 |
| Mar | 89 | 11 |
| Apr | 85 | 15 |
| May | 79 | 21 |
| Jun | 72 | 28 |
| Jul | 51 | 49 |
| Aug | 66 | 34 |
| Sep | 84 | 16 |
| Oct | 91 | 9 |
| Nov | 92 | 8 |
| Dec | 92 | 8 |
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 4, brings about 13 hours of light; the shortest, around January 1, only 11 hours — a swing of roughly 2 hours.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.1 | 11.4 | 11.9 | 12.4 | 12.8 | 13.0 | 12.9 | 12.6 | 12.1 | 11.6 | 11.2 | 11.0 |
| Sunrise (AM) | 6:42 | 6:37 | 6:18 | 5:54 | 5:37 | 5:35 | 5:43 | 5:52 | 5:56 | 6:02 | 6:14 | 6:31 |
| Sunset (PM) | 5:47 | 6:03 | 6:11 | 6:17 | 6:25 | 6:35 | 6:38 | 6:26 | 6:02 | 5:38 | 5:26 | 5:31 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 11.1 | 6:42 | 5:47 |
| Feb | 11.4 | 6:37 | 6:03 |
| Mar | 11.9 | 6:18 | 6:11 |
| Apr | 12.4 | 5:54 | 6:17 |
| May | 12.8 | 5:37 | 6:25 |
| Jun | 13.0 | 5:35 | 6:35 |
| Jul | 12.9 | 5:43 | 6:38 |
| Aug | 12.6 | 5:52 | 6:26 |
| Sep | 12.1 | 5:56 | 6:02 |
| Oct | 11.6 | 6:02 | 5:38 |
| Nov | 11.2 | 6:14 | 5:26 |
| Dec | 11.0 | 6:31 | 5:31 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Sa'dah averages about 19 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 4 and 26 days.
The sunnier stretch runs 7.0 months, from around Sep 17 to Apr 16. The sunniest month is December, with roughly 26 sunny days (brilliant).
The greyest month is July, down near 5 sunny days — about 81% fewer than the December peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 25 | 23 | 24 | 19 | 16 | 13 | 5 | 7 | 18 | 25 | 25 | 26 |
| Sky | Brilliant | Brilliant | Brilliant | Bright | Bright | Mixed | Gloomy | Gloomy | Bright | Brilliant | Brilliant | Brilliant |
| Sunny days | Sky | |
|---|---|---|
| Jan | 25 | Brilliant |
| Feb | 23 | Brilliant |
| Mar | 24 | Brilliant |
| Apr | 19 | Bright |
| May | 16 | Bright |
| Jun | 13 | Mixed |
| Jul | 5 | Gloomy |
| Aug | 7 | Gloomy |
| Sep | 18 | Bright |
| Oct | 25 | Brilliant |
| Nov | 25 | Brilliant |
| Dec | 26 | Brilliant |
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 Sa'dah, the air stays dry or comfortable essentially all year. Even in August, the muggiest month, it feels humid or worse only about 13% 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 | 95 | 85 | 89 | 94 | 64 | 55 | 95 | 99 | 100 | 100 |
| Comfortable (%) | 0 | 0 | 5 | 15 | 11 | 6 | 29 | 32 | 4 | 1 | 0 | 0 |
| Humid (%) | 0 | 0 | 0 | 0 | 0 | 0 | 7 | 13 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| Jan | 100 | 0 | 0 |
| Feb | 100 | 0 | 0 |
| Mar | 95 | 5 | 0 |
| Apr | 85 | 15 | 0 |
| May | 89 | 11 | 0 |
| Jun | 94 | 6 | 0 |
| Jul | 64 | 29 | 7 |
| Aug | 55 | 32 | 13 |
| Sep | 95 | 4 | 0 |
| Oct | 99 | 1 | 0 |
| 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 Sa'dah is typically calm, near 9 km/h, and varies moderately with the seasons.
The windier part of the year lasts 5.4 months, from around May 17 to Oct 27. The windiest month is September, averaging about 11 km/h (calm).
The calmer part of the year runs from around Oct 28 to Mar 7, with December the calmest month at about 7 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 8 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 11 | 11 | 8 | 7 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 8 | calm |
| Feb | 9 | calm |
| Mar | 9 | calm |
| Apr | 9 | calm |
| May | 9 | calm |
| Jun | 10 | calm |
| Jul | 10 | calm |
| Aug | 10 | calm |
| Sep | 11 | calm |
| Oct | 11 | calm |
| Nov | 8 | calm |
| Dec | 7 | calm |
Hazard calendar for Sa'dah
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Sa'dah sees seasonal dust haze (May–September), heaviest in July.
Best time to visit Sa'dah
To characterize how pleasant the weather is in Sa'dah throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around mid March, Sa'dah 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 time of year to visit Sa'dah for general outdoor tourist activities is from late September to late March, with a peak score in the second week of November.
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) | 8.6 | 8.9 | 8.1 | 7.1 | 6.1 | 5.4 | 4.8 | 4.6 | 6.6 | 8.9 | 9.3 | 9.0 |
| Rating | ideal | ideal | ideal | good | good | fair | fair | fair | good | ideal | ideal | ideal |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 8.6 | ideal |
| Feb | 8.9 | ideal |
| Mar | 8.1 | ideal |
| Apr | 7.1 | good |
| May | 6.1 | good |
| Jun | 5.4 | fair |
| Jul | 4.8 | fair |
| Aug | 4.6 | fair |
| Sep | 6.6 | good |
| Oct | 8.9 | ideal |
| Nov | 9.3 | ideal |
| Dec | 9.0 | 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 Sa'dah for hot-weather activities run from early May to early July and again from early September to late November, with a peak score in the last week of September.
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 Sa'dah, 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 June (highs near 31°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 22°C), pack light clothes and sun protection.
In June, Sa'dah sees daytime highs around 31°C and nights near 19°C. Pack light clothes and sun protection.
UV index (midday) in Sa'dah 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 Sa'dah peaks around April 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 8 (very high).
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) | 10 | 13 | 13 | 14 | 12 | 11 | 11 | 12 | 10 | 12 | 9 | 8 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Very high |
| Feb | 13 | Extreme |
| Mar | 13 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 12 | Extreme |
| Sep | 10 | Extreme |
| Oct | 12 | Extreme |
| Nov | 9 | Very high |
| Dec | 8 | Very high |
Average hourly UV index in Sa'dah
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 April the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 6.5 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) | 7 | 7.5 | 8 | 8.5 | 8.5 | 8 | 8 | 8 | 7.5 | 7.5 | 6.5 | 6.5 |
| UV ≥ 6 (h/day) | 5 | 5.5 | 6.5 | 6.5 | 6 | 6 | 6 | 6 | 5.5 | 5.5 | 4.5 | 4 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 7 | 5 |
| Feb | 7.5 | 5.5 |
| Mar | 8 | 6.5 |
| Apr | 8.5 | 6.5 |
| May | 8.5 | 6 |
| Jun | 8 | 6 |
| Jul | 8 | 6 |
| Aug | 8 | 6 |
| Sep | 7.5 | 5.5 |
| Oct | 7.5 | 5.5 |
| Nov | 6.5 | 4.5 |
| Dec | 6.5 | 4 |
Air quality in Sa'dah 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 Sa'dah is worst in July — around 52 µg/m³ PM2.5 (poor), about 2.5× the cleanest month (November, 21 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) | 29 | 39 | 38 | 40 | 38 | 45 | 52 | 42 | 32 | 22 | 21 | 22 |
| Level | Moderate | Poor | Poor | Poor | Poor | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 29 | Moderate |
| Feb | 39 | Poor |
| Mar | 38 | Poor |
| Apr | 40 | Poor |
| May | 38 | Poor |
| Jun | 45 | Poor |
| Jul | 52 | Poor |
| Aug | 42 | Poor |
| Sep | 32 | Moderate |
| Oct | 22 | Moderate |
| Nov | 21 | Moderate |
| Dec | 22 | Moderate |
Growing season
Sa'dah 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 (%) | 100 | 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 | 100 | 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. Sa'dah banks about 3,759 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around June.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 160 | 191 | 271 | 317 | 412 | 446 | 447 | 434 | 402 | 306 | 210 | 164 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 160 |
| Feb | 191 |
| Mar | 271 |
| Apr | 317 |
| May | 412 |
| Jun | 446 |
| Jul | 447 |
| Aug | 434 |
| Sep | 402 |
| Oct | 306 |
| Nov | 210 |
| Dec | 164 |
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.
Sa'dah receives about 6.3 kWh/m² a day of solar energy on average — intense — with a clear seasonal swing between 5.5 and 7.0 kWh/m².
The brighter stretch of the year lasts 4.3 months, from around Feb 22 to Jul 2. The brightest month is May, averaging about 7.0 kWh/m² (intense).
The dimmest month is January, down near 5.5 kWh/m² — roughly 21% less than the May peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.5 | 6.1 | 6.6 | 6.9 | 7.0 | 6.7 | 6.0 | 6.0 | 6.4 | 6.5 | 5.9 | 5.5 |
| Level | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 5.5 | Bright |
| Feb | 6.1 | Intense |
| Mar | 6.6 | Intense |
| Apr | 6.9 | Intense |
| May | 7.0 | Intense |
| Jun | 6.7 | Intense |
| Jul | 6.0 | Intense |
| Aug | 6.0 | Intense |
| Sep | 6.4 | Intense |
| Oct | 6.5 | Intense |
| Nov | 5.9 | Bright |
| Dec | 5.5 | Bright |
Where is Sa'dah?
Sa'dah sits at 16.9°N, 43.8°E, 1,876 m above sea level, in Yemen. The nearest listed city is Najran, 73 km away.
Topography around Sa'dah
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sa'dah.
Within 3 km, the terrain around Sa'dah has significant variations in elevation — a maximum elevation change of 253 m around an average of 1,877 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 665 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,766 m.
The land around Sa'dah is covered by bare terrain (61%) and cropland (32%) within 3 km, bare terrain (77%) within 16 km, and bare terrain (73%) within 80 km.
Yemen travel facts
- Travel advisory
- Level 4
- Do Not Travel
- Power plugs
- Type A / D / G
- 240 V · 50 Hz
- Prices
- ≈ 7% of US
- price level, 2013
- GDP per capita
- $634
- 2018
- Happiness
- 3.5 / 10
- World Happiness, 2025
- Homicide rate
- 5.8
- per 100k, 2013
- Road deaths
- 29.4
- per 100k/yr, 2019
- Income group
- Low
- World Bank
- English
- Very low
- EF EPI 402
- 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 Sa'dah (16.9402°, 43.7639°, elevation 1,876 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).