Climate and average weather in Keren
In Keren, the summers are hot, fairly dry, and clear and the winters are warm and partly cloudy.
Over the course of the year, the temperature in Keren typically varies from 14°C to 32°C, and is rarely below 11°C or above 34°C. May is the hottest month of the year, while August is the coldest.
Based on the travel score, the best times of year to visit Keren for warm-weather activities are from early January to early March and late September to late December.
- Hottest
- May
- 32°
- Coldest
- Aug
- 17°
- Wettest
- Aug
- 193 mm
- Driest
- Jan
- 1 mm
- Rain / yr
- 493 mm
- 91 wet days
- Daylight
- 11.1–12.9 h
- shortest–longest
- Elevation
- 1,399 m
- 15.8°N
- Clearest
- Nov
- 17% cloud
Keren is city in Eritrea.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Keren 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 December.
Temperature through the year
Daily average highs and lows in Keren, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
Temperatures in Keren stay fairly even through the year, without a distinct hot or cool season. The warmest month is May, with an average high of 32°C and low of 18°C; the coolest is August, with an average low of 17°C and high of 24°C.
Days typically run about 12°C warmer than nights, with the widest day–night swing (around 14°C) in March.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 28 | 30 | 31 | 32 | 30 | 26 | 24 | 27 | 28 | 27 | 26 |
| Avg low (°C) | 14 | 15 | 16 | 17 | 18 | 19 | 17 | 17 | 16 | 15 | 15 | 14 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 27 | 14 |
| Feb | 28 | 15 |
| Mar | 30 | 16 |
| Apr | 31 | 17 |
| May | 32 | 18 |
| Jun | 30 | 19 |
| Jul | 26 | 17 |
| Aug | 24 | 17 |
| Sep | 27 | 16 |
| Oct | 28 | 15 |
| Nov | 27 | 15 |
| Dec | 26 | 14 |
Average hourly temperature in Keren
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 May afternoons, near 32°C, and coldest before dawn in August, near 17°C.
Keren 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 | 27° / 14° | 1 | 0.1 | 11.2 | 8.8 |
| Feb | 28° / 15° | 1 | 0.1 | 11.5 | 8.1 |
| Mar | 30° / 16° | 5 | 1.8 | 11.9 | 6.6 |
| Apr | 31° / 17° | 13 | 4.9 | 12.3 | 5.4 |
| May | 32° / 18° | 20 | 5.6 | 12.7 | 4.9 |
| Jun | 30° / 19° | 42 | 11 | 12.9 | 5.3 |
| Jul | 26° / 17° | 86 | 20.1 | 12.8 | 5.2 |
| Aug | 24° / 17° | 193 | 28.3 | 12.5 | 4.1 |
| Sep | 27° / 16° | 123 | 16.8 | 12.1 | 5.7 |
| Oct | 28° / 15° | 6 | 1.6 | 11.6 | 7.9 |
| Nov | 27° / 15° | 3 | 0.9 | 11.3 | 8.7 |
| Dec | 26° / 14° | 1 | 0.1 | 11.1 | 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.
Keren gets about 493 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 3.7 months, from around Jun 5 to Sep 24, peaking in August at about 94% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jan 1.
August is the wettest month by volume, with 193 mm over about 28 wet days; January is the driest, with 1 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 0 | 0 | 6 | 16 | 18 | 37 | 65 | 91 | 56 | 5 | 3 | 0 |
| Rain days | 0 | 0 | 2 | 5 | 6 | 11 | 20 | 28 | 17 | 2 | 1 | 0 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 0 | 0 |
| Feb | 0 | 0 |
| Mar | 6 | 2 |
| Apr | 16 | 5 |
| May | 18 | 6 |
| Jun | 37 | 11 |
| Jul | 65 | 20 |
| Aug | 91 | 28 |
| Sep | 56 | 17 |
| Oct | 5 | 2 |
| Nov | 3 | 1 |
| Dec | 0 | 0 |
Monthly rainfall
Over a full year, Keren collects about 493 mm of rain across 91 wet days — roughly 41 mm in an average month.
It doesn’t fall evenly. August is the wettest month with 193 mm, while January is the driest at just 1 mm. The three wettest months alone bring about 81% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 1 | 1 | 5 | 13 | 20 | 42 | 86 | 193 | 123 | 6 | 3 | 1 |
| Rain days | 0 | 0 | 2 | 5 | 6 | 11 | 20 | 28 | 17 | 2 | 1 | 0 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 1 | 0 |
| Feb | 1 | 0 |
| Mar | 5 | 2 |
| Apr | 13 | 5 |
| May | 20 | 6 |
| Jun | 42 | 11 |
| Jul | 86 | 20 |
| Aug | 193 | 28 |
| Sep | 123 | 17 |
| Oct | 6 | 2 |
| Nov | 3 | 1 |
| Dec | 1 | 0 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Keren, 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 16 and lasts for 8.6 months, ending around June 5. The clearest month is November, when the sky is clear, mostly clear, or partly cloudy 95% of the time on average.
The cloudier part of the year begins around June 6 and lasts for 3.4 months, ending around September 15. The cloudiest month is August, when it is overcast or mostly cloudy 63% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 91 | 92 | 94 | 92 | 87 | 76 | 48 | 37 | 79 | 92 | 95 | 92 |
| Cloudier (%) | 9 | 8 | 6 | 8 | 13 | 24 | 52 | 63 | 21 | 8 | 5 | 8 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 91 | 9 |
| Feb | 92 | 8 |
| Mar | 94 | 6 |
| Apr | 92 | 8 |
| May | 87 | 13 |
| Jun | 76 | 24 |
| Jul | 48 | 52 |
| Aug | 37 | 63 |
| Sep | 79 | 21 |
| Oct | 92 | 8 |
| Nov | 95 | 5 |
| 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 May 30, brings about 12 h 54 min of light; the shortest, around January 1, only 11 h 06 min — a swing of roughly 1 h 48 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.2 | 11.5 | 11.9 | 12.3 | 12.7 | 12.9 | 12.8 | 12.5 | 12.1 | 11.6 | 11.3 | 11.1 |
| Sunrise (AM) | 7:01 | 6:57 | 6:39 | 6:16 | 6:00 | 5:58 | 6:06 | 6:14 | 6:18 | 6:22 | 6:34 | 6:50 |
| Sunset (PM) | 6:10 | 6:25 | 6:33 | 6:37 | 6:44 | 6:54 | 6:57 | 6:46 | 6:23 | 6:00 | 5:49 | 5:54 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 11.2 | 7:01 | 6:10 |
| Feb | 11.5 | 6:57 | 6:25 |
| Mar | 11.9 | 6:39 | 6:33 |
| Apr | 12.3 | 6:16 | 6:37 |
| May | 12.7 | 6:00 | 6:44 |
| Jun | 12.9 | 5:58 | 6:54 |
| Jul | 12.8 | 6:06 | 6:57 |
| Aug | 12.5 | 6:14 | 6:46 |
| Sep | 12.1 | 6:18 | 6:23 |
| Oct | 11.6 | 6:22 | 6:00 |
| Nov | 11.3 | 6:34 | 5:49 |
| Dec | 11.1 | 6:50 | 5:54 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Keren averages about 20 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 2 and 27 days.
The sunnier stretch runs 8.4 months, from around Sep 19 to May 31. The sunniest month is November, with roughly 27 sunny days (brilliant).
The greyest month is August, down near 3 sunny days — about 89% fewer than the November peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 25 | 23 | 26 | 25 | 23 | 14 | 6 | 3 | 17 | 26 | 27 | 26 |
| Sky | Brilliant | Brilliant | Brilliant | Brilliant | Bright | Mixed | Gloomy | Gloomy | Bright | Brilliant | Brilliant | Brilliant |
| Sunny days | Sky | |
|---|---|---|
| Jan | 25 | Brilliant |
| Feb | 23 | Brilliant |
| Mar | 26 | Brilliant |
| Apr | 25 | Brilliant |
| May | 23 | Bright |
| Jun | 14 | Mixed |
| Jul | 6 | Gloomy |
| Aug | 3 | Gloomy |
| Sep | 17 | Bright |
| Oct | 26 | Brilliant |
| Nov | 27 | 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 Keren, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 3.1 months, from around June 22 to September 23. 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 September 24 to June 21, and January 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 (%) | 84 | 82 | 74 | 65 | 73 | 55 | 6 | 0 | 25 | 63 | 58 | 67 |
| Comfortable (%) | 16 | 18 | 24 | 31 | 22 | 30 | 28 | 3 | 24 | 34 | 40 | 33 |
| Humid (%) | 0 | 0 | 2 | 4 | 6 | 16 | 65 | 93 | 49 | 3 | 2 | 1 |
| Muggy (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 1 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| Jan | 84 | 16 | 0 | 0 |
| Feb | 82 | 18 | 0 | 0 |
| Mar | 74 | 24 | 2 | 0 |
| Apr | 65 | 31 | 4 | 0 |
| May | 73 | 22 | 6 | 0 |
| Jun | 55 | 30 | 16 | 0 |
| Jul | 6 | 28 | 65 | 0 |
| Aug | 0 | 3 | 93 | 3 |
| Sep | 25 | 24 | 49 | 1 |
| Oct | 63 | 34 | 3 | 0 |
| Nov | 58 | 40 | 2 | 0 |
| Dec | 67 | 33 | 1 | 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 Keren is typically calm, near 7 km/h, and varies little with the seasons.
The windier part of the year lasts 6.9 months, from around Oct 4 to May 2. The windiest month is October, averaging about 8 km/h (calm).
The calmer part of the year runs from around Jul 26 to Oct 3, with September the calmest month at about 5 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 8 | 8 | 8 | 8 | 7 | 7 | 8 | 6 | 5 | 8 | 8 | 8 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 8 | calm |
| Feb | 8 | calm |
| Mar | 8 | calm |
| Apr | 8 | calm |
| May | 7 | calm |
| Jun | 7 | calm |
| Jul | 8 | calm |
| Aug | 6 | calm |
| Sep | 5 | calm |
| Oct | 8 | calm |
| Nov | 8 | calm |
| Dec | 8 | calm |
Hazard calendar for Keren
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Keren sees seasonal dust haze (June–August), heaviest in July.
Best time to visit Keren
To characterize how pleasant the weather is in Keren throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around early October, Keren 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 Keren for general outdoor tourist activities is from late September to early March, with a peak score in the last week of December.
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) | 8.8 | 8.1 | 6.6 | 5.4 | 4.9 | 5.3 | 5.2 | 4.1 | 5.7 | 7.9 | 8.7 | 8.9 |
| Rating | ideal | ideal | good | fair | fair | fair | fair | fair | good | ideal | ideal | ideal |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 8.8 | ideal |
| Feb | 8.1 | ideal |
| Mar | 6.6 | good |
| Apr | 5.4 | fair |
| May | 4.9 | fair |
| Jun | 5.3 | fair |
| Jul | 5.2 | fair |
| Aug | 4.1 | fair |
| Sep | 5.7 | good |
| Oct | 7.9 | ideal |
| Nov | 8.7 | 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 time of year to visit Keren for hot-weather activities is from late September to late May, with a peak score in the last week of February.
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 Keren, 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 May (highs near 32°C), the essentials are light clothes and sun protection. In the cold season around August (highs near 24°C), pack light clothes, rain gear and sun protection.
In May, Keren sees daytime highs around 32°C and nights near 18°C. Pack light clothes and sun protection. About 6 days see rain.
UV index (midday) in Keren 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 Keren peaks around April 14 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 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 | 12 | 14 | 14 | 13 | 11 | 10 | 10 | 12 | 11 | 9 | 8 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Extreme |
| Feb | 12 | Extreme |
| Mar | 14 | Extreme |
| Apr | 14 | Extreme |
| May | 13 | Extreme |
| Jun | 11 | Extreme |
| Jul | 10 | Very high |
| Aug | 10 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 8 | Very high |
Average hourly UV index in Keren
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 | 8 | 7.5 | 7 | 6.5 |
| UV ≥ 6 (h/day) | 5 | 5.5 | 6 | 6.5 | 6.5 | 6 | 5.5 | 5.5 | 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 |
| Apr | 8.5 | 6.5 |
| May | 8.5 | 6.5 |
| Jun | 8 | 6 |
| Jul | 8 | 5.5 |
| Aug | 8 | 5.5 |
| Sep | 8 | 5.5 |
| Oct | 7.5 | 5.5 |
| Nov | 7 | 4.5 |
| Dec | 6.5 | 4 |
Air quality in Keren 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 Keren is worst in May — around 23 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 14 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) | 17 | 18 | 23 | 21 | 23 | 22 | 22 | 20 | 17 | 19 | 15 | 14 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 17 | Moderate |
| Feb | 18 | Moderate |
| Mar | 23 | Moderate |
| Apr | 21 | Moderate |
| May | 23 | Moderate |
| Jun | 22 | Moderate |
| Jul | 22 | Moderate |
| Aug | 20 | Moderate |
| Sep | 17 | Moderate |
| Oct | 19 | Moderate |
| Nov | 15 | Moderate |
| Dec | 14 | Moderate |
Growing season
Keren 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. Keren banks about 4,378 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around May.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 314 | 317 | 397 | 427 | 467 | 422 | 354 | 328 | 343 | 358 | 332 | 320 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 314 |
| Feb | 317 |
| Mar | 397 |
| Apr | 427 |
| May | 467 |
| Jun | 422 |
| Jul | 354 |
| Aug | 328 |
| Sep | 343 |
| Oct | 358 |
| Nov | 332 |
| Dec | 320 |
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.
Keren receives about 6.0 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 5.1 and 7.1 kWh/m².
The brighter stretch of the year lasts 4.3 months, from around Feb 13 to Jun 23. The brightest month is April, averaging about 7.0 kWh/m² (intense).
The dimmest month is August, down near 5.2 kWh/m² — roughly 26% less than the April peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.4 | 6.0 | 6.8 | 7.0 | 6.9 | 6.2 | 5.4 | 5.1 | 5.9 | 6.2 | 5.7 | 5.3 |
| Level | Bright | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Intense | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 5.4 | Bright |
| Feb | 6.0 | Intense |
| Mar | 6.8 | Intense |
| Apr | 7.0 | Intense |
| May | 6.9 | Intense |
| Jun | 6.2 | Intense |
| Jul | 5.4 | Bright |
| Aug | 5.1 | Bright |
| Sep | 5.9 | Bright |
| Oct | 6.2 | Intense |
| Nov | 5.7 | Bright |
| Dec | 5.3 | Bright |
Where is Keren?
Keren sits at 15.8°N, 38.5°E, 1,399 m above sea level, in Eritrea. The nearest listed city is Asmara, 71 km away.
Topography around Keren
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Keren.
Within 3 km, the terrain around Keren has significant variations in elevation — a maximum elevation change of 412 m around an average of 1,420 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,346 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,515 m.
The land around Keren is covered by grassland (48%) and cropland (23%) within 3 km, grassland (46%) and shrubs (37%) within 16 km, and grassland (47%), shrubs (23%) and bare terrain (22%) within 80 km.
Eritrea travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / L
- 230 V · 50 Hz
- Prices
- ≈ 33% of US
- price level, 2021
- GDP per capita
- $689
- 2011
- Homicide rate
- 15.6
- per 100k, 2012
- Road deaths
- 37.9
- per 100k/yr, 2019
- Income group
- Low
- World Bank
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 Keren (15.7779°, 38.4511°, elevation 1,399 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).