Ziway weather in September

In September, Ziway sees average daytime highs of 23°C and overnight lows near 18°C, with 114 mm of rain across 19.3 wet days and about 12 hours of daylight. It is the 10th-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 23°C in the first days to 24°C by the end. The sky is clear or mostly clear about 25% of the time in September, and the air most often feels comfortable.

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 Ziway's 9th-clearest and 12th-windiest month. For the whole year in context, see Ziway's year-round climate.

Daytime high
23°
10th warmest
Overnight low
18°
7th coldest
Rainfall
114 mm
19.3 wet days
Daylight
12 hours
6:18 AM – 6:21 PM
Cloud cover
53%
9th clearest
Wind
8 km/h
12th windiest
Solar energy
5.86 kWh/m²
Travel score
5.6
out of 10

Ziway is place in Oromia, Ethiopia.

Density
8,380/km²
people per km²

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 23°C in the first days to 24°C by the end.

A typical September day in Ziway reaches about 23°C in the afternoon and slips back to 18°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 25°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C cooler than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12318
22318
32318
42318
52318
62318
72318
82318
92318
102318
112318
122318
132318
142318
152318
162318
172318
182418
192418
202418
212418
222418
232418
242418
252418
262418
272418
282418
292418
302418

Ziway weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 17°30.911.68.8
Feb26° / 18°61.411.78.3
Mar27° / 19°285.311.97.5
Apr27° / 20°569.812.26.5
May26° / 19°7010.912.46.6
Jun24° / 19°276.212.57.6
Jul23° / 18°6715.912.45.9
Aug22° / 18°10720.812.35.1
Sep23° / 18°11419.3125.6
Oct25° / 18°506.211.87.7
Nov25° / 17°71.311.68.8
Dec25° / 17°10.311.59.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 44% of September, with mostly cloudy or overcast conditions the remaining 31%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15941
26040
36139
46238
56337
66436
76436
86535
96634
106733
116832
126931
136931
147030
157129
167228
177228
187228
197327
207327
217327
227327
237228
247228
257327
267327
277327
287327
297327
307327

Chance of precipitation in September

Any precipitation

Ziway gets around 114 mm of rain over 19.3 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 63% and peaks near 68% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
168
267
367
466
566
666
766
866
966
1066
1165
1265
1365
1465
1564
1664
1764
1864
1964
2064
2163
2263
2362
2461
2559
2658
2756
2855
2953
3051

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 84% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
108713
208713
308713
408713
508713
608614
708614
808614
908614
1008515
1108515
1208515
1308515
1408515
1508614
1618514
1718514
1818514
1918514
2028513
2138413
2248412
2358411
2468311
2588210
269829
2711818
2813798
2916777
3018757

Wind in September

Winds average 8 km/h in September, the calmest month.

Across September, daily wind ranges from about 8 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
309calm

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 6:16 AM, and sunset from 6:29 PM to 6:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:206:29
212.16:206:29
312.16:206:28
412.16:206:28
512.16:206:27
612.16:206:27
712.16:196:26
812.16:196:25
912.16:196:25
1012.16:196:24
1112.16:196:24
1212.16:196:23
1312.16:196:23
1412.16:186:22
1512.16:186:21
1612.06:186:21
1712.06:186:20
1812.06:186:20
1912.06:186:19
2012.06:186:18
2112.06:176:18
2212.06:176:17
2312.06:176:17
2412.06:176:16
2512.06:176:15
2612.06:176:15
2712.06:176:14
2812.06:176:14
2911.96:166:13
3011.96:166:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.86 kWh/m².

For context, solar energy here swings from a low near 5.02 kWh/m² to a high of 6.7 kWh/m² in March across the year — September's 5.86 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
226.0Bright
236.0Bright
246.0Bright
256.0Bright
266.0Bright
276.0Intense
286.0Intense
296.0Intense
306.1Intense
Planning a trip in September

Hazard calendar for Ziway

In seasonPeak

In September, Ziway sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Ziway's rainy season runs April–May, when most of the year's rain falls.

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

Is September a good time to visit Ziway?

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

5.6
Sightseeing
11th-best month of the year
4.5
Beach & pool
10th-best month of the year

September is a reasonable time to visit Ziway for sightseeing.

What to pack for Ziway in September

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

In September, Ziway sees daytime highs around 23°C and nights near 18°C. Pack rain gear. Worth having: light clothes and sun protection. About 19 days see rain.

rain gearlight clothessun protection

UV index in Ziway 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 Ziway peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 10 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 17UV 15Dec 10UV 11
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar16Extreme
Apr14Extreme
May13Extreme
Jun12Extreme
Jul12Extreme
Aug14Extreme
Sep13Extreme
Oct13Extreme
Nov11Extreme
Dec11Extreme

Air quality in Ziway 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 Ziway is worst in June — around 39 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateModerateJun 1738 µg/m³Nov 2324 µg/m³
PM2.5 (µg/m³)Level
Jan25Moderate
Feb26Moderate
Mar27Moderate
Apr26Moderate
May31Moderate
Jun39Poor
Jul32Moderate
Aug29Moderate
Sep36Poor
Oct32Moderate
Nov24Moderate
Dec24Moderate
Location & terrain

Where is Ziway?

Ziway sits at 7.9°N, 38.7°E, 1,649 m above sea level, in Ethiopia. The nearest listed city is Mek’ī, 26 km away.

Topography around Ziway

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

Within 3 km, the terrain around Ziway has only modest variations in elevation — a maximum elevation change of 34 m around an average of 1,646 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 591 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,645 m.

The land around Ziway is covered by cropland (31%), artificial surfaces (28%) and water (22%) within 3 km, cropland (51%) and water (29%) within 16 km, and cropland (71%) within 80 km.

3 km
34 m
16 km
591 m
80 km
2,645 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Mek’ī 26 km · Insēno 31 km · Butajīra 44 km · Āsela 46 km · ‘Alem T’ēna 48 km · Sagurē 52 km · Dēra 54 km · Ciro 54 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 Ziway (7.9333°, 38.7167°, elevation 1,649 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).