Mertule Maryam weather in September

In September, Mertule Maryam sees average daytime highs of 22°C and overnight lows near 13°C, with 63 mm of rain across 10.6 wet days and about 12.1 hours of daylight. It is the 10th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 29% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 12 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Mertule Maryam's 9th-clearest and 10th-windiest month. For the whole year in context, see Mertule Maryam's year-round climate.

Daytime high
22°
10th warmest
Overnight low
13°
4th coldest
Rainfall
63 mm
10.6 wet days
Daylight
12 h 06 min
6:19 AM – 6:23 PM
Cloud cover
51%
9th clearest
Wind
5 km/h
10th windiest
Solar energy
5.36 kWh/m²
Travel score
6.6
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical September day in Mertule Maryam reaches about 22°C in the afternoon and slips back to 13°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 24°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C cooler than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12113
22113
32113
42113
52113
62113
72113
82112
92212
102212
112212
122212
132212
142212
152212
162212
172212
182212
192213
202213
212213
222213
232213
242213
252313
262313
272313
282313
292313
302313

Mertule Maryam weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 4th-wettest month here — the current month is highlighted below.

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

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 42% of September, with mostly cloudy or overcast conditions the remaining 28%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
26040
36139
46139
56337
66436
76535
86733
96733
106931
117030
127129
137129
147327
157327
167426
177525
187525
197525
207723
217723
227822
237822
247822
257921
267921
277822
287822
297921
307921

Chance of precipitation in September

Any precipitation

Mertule Maryam gets around 63 mm of rain over 10.6 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 36% and peaks near 66% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
166
264
362
460
557
655
753
850
948
1045
1143
1240
1338
1436
1534
1632
1730
1828
1927
2025
2124
2223
2321
2420
2519
2618
2718
2817
2916
3016

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the dry band about 93% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
18119
28218
38317
48416
58614
68713
78812
89010
9919
10928
11937
12937
13946
14946
15955
16964
17964
18964
19973
20973
21973
22982
23982
24982
25982
26982
27991
28991
29991
30991

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 12 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over September. Sunrise moves from 6:20 AM to 6:19 AM, and sunset from 6:33 PM to 6:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:206:33
212.26:206:32
312.26:206:32
412.26:206:31
512.26:206:30
612.26:206:30
712.26:206:29
812.16:206:28
912.16:206:28
1012.16:206:27
1112.16:206:26
1212.16:206:26
1312.16:206:25
1412.16:206:24
1512.16:206:24
1612.16:196:23
1712.06:196:22
1812.06:196:22
1912.06:196:21
2012.06:196:20
2112.06:196:20
2212.06:196:19
2312.06:196:18
2412.06:196:18
2512.06:196:17
2612.06:196:16
2711.96:196:16
2811.96:196:15
2911.96:196:14
3011.96:196:14

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.36 kWh/m².

For context, solar energy here swings from a low near 4.37 kWh/m² to a high of 6.39 kWh/m² in April across the year — September's 5.36 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.4Bright
175.4Bright
185.4Bright
195.4Bright
205.4Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
Planning a trip in September

Hazard calendar for Mertule Maryam

In seasonPeak

None of Mertule Maryam's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

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

Is September a good time to visit Mertule Maryam?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.6
Sightseeing
10th-best month of the year
4.6
Beach & pool
10th-best month of the year

September is a reasonable time to visit Mertule Maryam for sightseeing.

What to pack for Mertule Maryam in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Mertule Maryam sees daytime highs around 22°C and nights near 13°C. Worth packing: rain gear and sun protection. About 11 days see rain.

rain gearsun protection

UV index in Mertule Maryam in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

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

Air quality in Mertule Maryam in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual 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
Location & terrain

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
September weather 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).