Asmara weather in September

In September, Asmara sees average daytime highs of 27°C and overnight lows near 16°C, with 38 mm of rain across 6.1 wet days and about 12.1 hours of daylight. It is the 3rd-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 69% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Asmara's 1st-clearest and 4th-windiest month. For the whole year in context, see Asmara's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
16°
9th coldest
Rainfall
38 mm
6.1 wet days
Daylight
12 h 06 min
6:16 AM – 6:21 PM
Cloud cover
29%
1st clearest
Wind
7 km/h
4th windiest
Solar energy
6.08 kWh/m²
Travel score
7.5
out of 10

Asmara is capital city of Eritrea.

Density
46/km²
people per km²
Founded
1897

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical September day in Asmara reaches about 27°C in the afternoon and slips back to 16°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 28°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12716
22716
32716
42716
52716
62716
72716
82716
92716
102716
112716
122716
132716
142716
152716
162716
172716
182716
192716
202716
212716
222716
232715
242715
252715
262715
272715
282715
292715
302615

Asmara weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 12°4912.911.26.5
Feb23° / 12°349.311.57.1
Mar25° / 14°4812.211.96.8
Apr26° / 15°6316.112.36.1
May27° / 16°4710.812.76.8
Jun28° / 16°398.312.96.3
Jul26° / 16°18227.312.84.2
Aug26° / 17°21126.912.54.3
Sep27° / 16°386.112.17.5
Oct25° / 14°285.711.78.1
Nov23° / 13°328.411.37.6
Dec22° / 12°3610.911.16.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 69% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 14%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17228
27426
37624
47624
57822
67921
78119
88218
98317
108515
118515
128713
138713
148812
158911
168911
17919
18919
19919
20928
21928
22928
23928
24919
25919
26919
27919
289010
299010
308911

Chance of precipitation in September

Any precipitation

Asmara gets around 38 mm of rain over 6.1 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 23% and peaks near 61% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
161
258
355
451
548
644
741
837
934
1031
1127
1224
1322
1419
1516
1614
1712
1811
199
208
217
226
236
246
256
266
276
287
297
308

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 77% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
133661
236631
340591
444551
548511
653470
757430
861390
966340
1070300
1174260
1278220
1381190
1484160
1587130
1689110
179190
189370
199460
209460
219550
229550
239550
249550
259460
269370
279280
289190
2990100
3088120

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 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 24 minutes over September. Sunrise moves from 6:15 AM to 6:17 AM, and sunset from 6:33 PM to 6:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:156:33
212.36:156:32
312.36:156:32
412.36:156:31
512.26:156:30
612.26:156:29
712.26:156:28
812.26:156:28
912.26:166:27
1012.26:166:26
1112.26:166:25
1212.16:166:24
1312.16:166:24
1412.16:166:23
1512.16:166:22
1612.16:166:21
1712.16:166:20
1812.16:166:20
1912.06:166:19
2012.06:166:18
2112.06:166:17
2212.06:166:16
2312.06:176:15
2412.06:176:15
2512.06:176:14
2611.96:176:13
2711.96:176:12
2811.96:176:11
2911.96:176:11
3011.96:176:10

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.08 kWh/m².

For context, solar energy here swings from a low near 5.05 kWh/m² to a high of 6.67 kWh/m² in April across the year — September's 6.08 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.8Bright
75.8Bright
85.8Bright
95.9Bright
105.9Bright
116.0Bright
126.0Bright
136.0Intense
146.0Intense
156.1Intense
166.1Intense
176.1Intense
186.2Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
Planning a trip in September

Hazard calendar for Asmara

In seasonPeak

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

Asmara's rainy season runs July–August, when most of the year's rain falls.

Asmara sees seasonal dust haze (June–August), heaviest in July.

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

Is September a good time to visit Asmara?

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

7.5
Sightseeing
3rd-best month of the year
7.5
Beach & pool
1st-best month of the year

September is one of the better times to visit Asmara for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Asmara in September

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

In September, Asmara sees daytime highs around 27°C and nights near 16°C. Pack sun protection. Worth having: light clothes. About 6 days see rain.

sun protectionlight clothes

UV index in Asmara 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 Asmara peaks around April 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 12UV 15Dec 13UV 9
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar14Extreme
Apr15Extreme
May13Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep13Extreme
Oct12Extreme
Nov9Very high
Dec9Very high

Air quality in Asmara 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 Asmara is worst in June — around 27 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 1227 µg/m³Dec 1519 µg/m³
PM2.5 (µg/m³)Level
Jan22Moderate
Feb22Moderate
Mar26Moderate
Apr25Moderate
May26Moderate
Jun27Moderate
Jul24Moderate
Aug22Moderate
Sep24Moderate
Oct24Moderate
Nov21Moderate
Dec19Moderate
Location & terrain

Where is Asmara?

Asmara sits at 15.3°N, 38.9°E, 2,334 m above sea level, in Eritrea. The nearest listed city is Mendefera, 52 km away.

MendeferaMassawaKerenIntich’oAdwaĀdīgratAksumIdaga Hamus

Topography around Asmara

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

Within 3 km, the terrain around Asmara has only modest variations in elevation — a maximum elevation change of 125 m around an average of 2,341 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,574 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,865 m.

The land around Asmara is covered by artificial surfaces (52%) and cropland (29%) within 3 km, cropland (32%), grassland (31%) and shrubs (30%) within 16 km, and grassland (33%), shrubs (29%) and bare terrain (20%) within 80 km.

3 km
125 m
16 km
1,574 m
80 km
2,865 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Mendefera 52 km · Massawa 65 km · Keren 71 km · Intich’o 120 km · Adwa 131 km · Ādīgrat 131 km · Aksum 137 km · Idaga Hamus 145 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 Asmara (15.3381°, 38.9318°, elevation 2,334 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).