Climate and average weather in Mertule Maryam

In Mertule Maryam, the summers are warm, fairly dry, and mostly clear and the winters are mild and partly cloudy.

Best: late September to early March

Over the course of the year, the temperature in Mertule Maryam typically varies from 12°C to 27°C, and is rarely below 9°C or above 30°C. April is the hottest month of the year, while August is the coldest.

Based on the travel score, the best times of year to visit Mertule Maryam for warm-weather activities are from mid May to mid June and late September to early March.

Hottest
Apr
27°
Coldest
Aug
13°
Wettest
Aug
239 mm
Driest
Nov
12 mm
Rain / yr
831 mm
107 wet days
Daylight
11.4–12.6 h
shortest–longest
Elevation
2,133 m
10.8°N
Clearest
Dec
29% cloud

Mertule Maryam 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 early March.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Mertule Maryam, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

Temperatures in Mertule Maryam stay fairly even through the year, without a distinct hot or cool season. The warmest month is April, with an average high of 27°C and low of 15°C; the coolest is August, with an average low of 13°C and high of 21°C.

Days typically run about 11°C warmer than nights, with the widest day–night swing (around 13°C) in February.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2512
Feb2613
Mar2714
Apr2715
May2715
Jun2515
Jul2214
Aug2113
Sep2213
Oct2414
Nov2413
Dec2412

Average hourly temperature in Mertule Maryam

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 April afternoons, near 27°C, and coldest before dawn in August, near 13°C.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM

Mertule Maryam weather by month

Every month at a glance. Click a month for its detailed page.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 12°274.211.48.2
Feb26° / 13°304.911.67.7
Mar27° / 14°67911.97.0
Apr27° / 15°47712.27.1
May27° / 15°365.312.57.4
Jun25° / 15°519.112.67.0
Jul22° / 14°23224.812.64.4
Aug21° / 13°23925.112.44.3
Sep22° / 13°6310.612.16.6
Oct24° / 14°142.411.88.6
Nov24° / 13°122.211.58.9
Dec24° / 12°132.211.48.9

Chance of rain

How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.

Mertule Maryam gets about 831 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 3.1 months, from around Jun 16 to Sep 18, peaking in July at about 87% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Dec 3.

August is the wettest month by volume, with 239 mm over about 25 wet days; November is the driest, with 12 mm.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecdrierwetterdriermostly drysome rainoften wetvery wetJul 28 · 87%Dec 3 · 4%
Rain on a day (%)Rain days
Jan144
Feb185
Mar289
Apr247
May175
Jun329
Jul7925
Aug7925
Sep3711
Oct82
Nov72
Dec72

Monthly rainfall

Over a full year, Mertule Maryam collects about 831 mm of rain across 107 wet days — roughly 69 mm in an average month.

It doesn’t fall evenly. August is the wettest month with 239 mm, while November is the driest at just 12 mm. The three wettest months alone bring about 65% of the year’s total.

050100150200250300JanFebMarAprMayJunJulAugSepOctNovDec27306747365123223963141213
Rainfall (mm)Rain days
Jan274
Feb305
Mar679
Apr477
May365
Jun519
Jul23225
Aug23925
Sep6311
Oct142
Nov122
Dec132

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

How often the daytime sky is clear, partly cloudy or overcast.

In Mertule Maryam, 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 11 and lasts for 7.1 months, ending around April 13. The clearest month is December, when the sky is clear, mostly clear, or partly cloudy 85% of the time on average.

The cloudier part of the year begins around June 13 and lasts for 3.0 months, ending around September 10. The cloudiest month is July, when it is overcast or mostly cloudy 59% of the time.

0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JanFebMarAprMayJunJulAugSepOctNovDecDec 7 · 86%Aug 1 · 31%clearmostly clearpartly cloudymostly cloudyovercastclearercloudierclearer
Clearer (%)Cloudier (%)
Jan7426
Feb7426
Mar7129
Apr6733
May6634
Jun6634
Jul4159
Aug4258
Sep7129
Oct7921
Nov8317
Dec8515

Daylight, sunrise and sunset

DaylightNight

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 25, brings about 12 h 36 min of light; the shortest, around January 1, only 11 h 24 min — a swing of roughly 1 h 12 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan11.46:536:19
Feb11.66:526:31
Mar11.96:396:34
Apr12.26:206:34
May12.56:086:38
Jun12.66:086:46
Jul12.66:156:50
Aug12.46:206:42
Sep12.16:196:23
Oct11.86:196:05
Nov11.56:275:57
Dec11.46:426:04

Sunny days

How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.

Mertule Maryam averages about 13 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 2 and 22 days.

The sunnier stretch runs 5.6 months, from around Sep 26 to Mar 13. The sunniest month is December, with roughly 21 sunny days (bright).

The greyest month is July, down near 3 sunny days — about 85% fewer than the December peak.

0510152025JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyersunniergloomymixedbrightbrilliantDec 722 daysJul 302 days
Sunny daysSky
Jan16Bright
Feb14Bright
Mar13Mixed
Apr12Mixed
May13Mixed
Jun10Mixed
Jul3Gloomy
Aug3Gloomy
Sep9Mixed
Oct19Bright
Nov21Bright
Dec22Bright

Humidity comfort

DryComfortableHumidMuggyOppressiveMiserable

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 Mertule Maryam, the air stays dry or comfortable essentially all year. Even in February, the muggiest month, it feels humid or worse only about 0% of the time — humidity is not something you need to plan around here.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDeccomfortabledry
Dry (%)Comfortable (%)
Jan1000
Feb991
Mar982
Apr991
May991
Jun973
Jul7525
Aug6535
Sep937
Oct1000
Nov1000
Dec1000

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 Mertule Maryam is steady company: average speeds sit near 5 km/hcalm — in every month of the year, with no meaningful windy or calm season.

0510JanFebMarAprMayJunJulAugSepOctNovDeccalmMay 31 · 6 km/hJul 31 · 4 km/h
Wind speed (km/h)Feels
Jan5calm
Feb5calm
Mar5calm
Apr5calm
May6calm
Jun6calm
Jul4calm
Aug4calm
Sep5calm
Oct5calm
Nov5calm
Dec5calm

Hazard calendar for Mertule Maryam

In seasonPeak

When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.

Mertule Maryam's monsoon runs July–August, when most of the year's rain falls.

Mertule Maryam sees seasonal dust haze (June), heaviest in June.

Monsoon
Dust
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Best time to visit Mertule Maryam

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Mertule Maryam throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around late February, Mertule Maryam 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 Mertule Maryam for general outdoor tourist activities run from mid May to mid June and again from late September to early March, with a peak score in the first week of December.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebest timetravel scoretemperaturecloudsprecipitationDec 2 · 9.1

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).

Travel score (0–10)Rating
Jan8.2ideal
Feb7.7ideal
Mar7.0good
Apr7.1good
May7.3good
Jun6.9good
Jul4.5fair
Aug4.3fair
Sep6.6good
Oct8.6ideal
Nov8.9ideal
Dec8.9ideal

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 Mertule Maryam for hot-weather activities is from early October to late June, with a peak score in the first week of December.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationDec 4 · 7.7

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 Mertule Maryam, by month

EssentialRecommendedOptional

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 April (highs near 27°C), the essentials are light clothes and sun protection. In the cold season around August (highs near 21°C), pack rain gear and sun protection.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In April, Mertule Maryam sees daytime highs around 27°C and nights near 15°C. Pack light clothes and sun protection. About 7 days see rain.

UV index (midday) in Mertule Maryam by month

LowModerateHighVery highExtreme

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 Mertule Maryam peaks around March 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 at about 10 (extreme).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 22UV 15Dec 11UV 10
UV index (midday)Level
Jan12Extreme
Feb13Extreme
Mar15Extreme
Apr15Extreme
May13Extreme
Jun13Extreme
Jul12Extreme
Aug14Extreme
Sep13Extreme
Oct13Extreme
Nov11Extreme
Dec10Extreme

Average hourly UV index in Mertule Maryam

LowModerateHighVery highExtreme

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 March the burn window is concentrated in the middle of the day: about 8 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.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM
UV ≥ 3 (h/day)UV ≥ 6 (h/day)
Jan7.55.5
Feb86
Mar86.5
Apr8.56.5
May86.5
Jun8.56.5
Jul86
Aug8.56.5
Sep86
Oct86
Nov7.55
Dec75

Air quality in Mertule Maryam by month

GoodModeratePoorUnhealthyVery unhealthy

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 Mertule Maryam is worst in January — around 45 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorModeratePoorJan 1345 µg/m³Aug 1132 µg/m³
PM2.5 (µg/m³)Level
Jan45Poor
Feb40Poor
Mar36Poor
Apr34Moderate
May33Moderate
Jun40Poor
Jul33Moderate
Aug32Moderate
Sep40Poor
Oct42Poor
Nov40Poor
Dec43Poor
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Mertule Maryam is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecfrost-free year round
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr1000
May1000
Jun1000
Jul1000
Aug1000
Sep1000
Oct1000
Nov1000
Dec1000

Growing degree days

Degree days (base 10°C)Frost-free shaded

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. Mertule Maryam banks about 3,253 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around May.

01,0002,0003,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan257
Feb272
Mar319
Apr331
May346
Jun299
Jul236
Aug213
Sep217
Oct269
Nov248
Dec247

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.

Mertule Maryam receives about 5.6 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 4.3 and 6.5 kWh/m².

The brighter stretch of the year lasts 4.5 months, from around Jan 16 to May 31. The brightest month is April, averaging about 6.4 kWh/m² (intense).

The dimmest month is July, down near 4.4 kWh/m² — roughly 31% less than the April peak.

012345678JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerdimmoderatebrightintenseApr 86.5 kWhJul 284.3 kWh
Solar energy (kWh/m²)Level
Jan5.6Bright
Feb6.1Intense
Mar6.3Intense
Apr6.4Intense
May6.0Bright
Jun5.1Bright
Jul4.4Bright
Aug4.7Bright
Sep5.4Bright
Oct5.9Bright
Nov5.8Bright
Dec5.5Bright

Where is Mertule Maryam?

Mertule Maryam sits at 10.8°N, 38.3°E, 2,133 m above sea level, in Ethiopia. The nearest listed city is Bichena, 43 km away.

ĀdētNefas Mewch’a

Topography around Mertule Maryam

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mertule Maryam.

Within 3 km, the terrain around Mertule Maryam has large variations in elevation — a maximum elevation change of 876 m around an average of 2,210 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,045 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,038 m.

The land around Mertule Maryam is covered by cropland (55%) and shrubs (22%) within 3 km, cropland (64%) within 16 km, and cropland (58%) and grassland (21%) within 80 km.

3 km
876 m
16 km
2,045 m
80 km
3,038 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
Nearby: Bichena 43 km · Wegeda 44 km · Mot’a 52 km · Lumamē 74 km · Debre Mark’os 79 km · Dembech’a 91 km · Ādēt 98 km · Nefas Mewch’a 102 km

Ethiopia travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type C / E / F / L
220 V · 50 Hz
Prices
≈ 37% of US
price level, 2025
GDP per capita
$933
2025
Happiness
4.0 / 10
World Happiness, 2025
Safe drinking water
14%
of population, 2024
Homicide rate
8.5
per 100k, 2012
Road deaths
28.2
per 100k/yr, 2019
Income group
Low
World Bank
English
Low
EF EPI 499
Religion
Ethiopian Orthodox 44%Muslim 31%Protestant 23%other 1%

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 Mertule Maryam (10.8333°, 38.2667°, elevation 2,133 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).