Ziway climate — normals and trends
Ziway (Ethiopia) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 20.7 °C and it receives 700 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is April (22.3 °C on average) and the coldest is August (19.3 °C). Rainfall peaks in September.
Ziway averages 0 frost days, 1 hot days (≥ 30 °C) and 118 rainy days per year.
Ziway has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The hottest day of the period reached 32.1 °C (on 29 March 2016) and the coldest 11.8 °C (on 18 January 1941).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
ZiwayOromiya
- coords
- 7.93°, 38.72°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
20.7°C
Average daily high
24.3°C
Average daily low
17.8°C
Annual rainfall
700mm
Sunshine / day
10.8h
Mean relative humidity
62%
Average peak wind
18.2km/h
Seasonal range
3.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
118 d/yr
Annual snowfall
0.0 cm
Average feels-like high
24.4 °C
Average feels-like low
17.0 °C
Average peak gust
30.6 km/h
Tropical nights (≥ 20 °C)
21 d/yr
Solar radiation
21.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.75 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
32.1 °C
29 March 2016
Coldest day
11.8 °C
18 January 1941
Wettest day
71 mm
10 May 2016
Windiest day
37.2 km/h
25 January 1974
Strongest gust
61.6 km/h
8 September 1960
Hottest feels-like
34.6 °C
29 March 2016
Coldest feels-like
7.2 °C
20 January 1987
Sunniest day
12.1 h
6 May 1941
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 25.0 °C | +0.5 °C | 0 mm | -4 mm |
| Feb | 27.2 °C | +1.6 °C | 0 mm | -11 mm |
| Mar | 27.4 °C | +1.0 °C | 38 mm | -2 mm |
| Apr | 28.2 °C | +1.9 °C | 21 mm | -55 mm |
| May | 26.2 °C | +0.5 °C | 61 mm | -27 mm |
| Jun | 25.4 °C | +1.5 °C | 2 mm | -38 mm |
| Jul | 23.0 °C | +1.1 °C | 61 mm | -34 mm |
| Aug | 21.9 °C | +0.2 °C | 158 mm | +31 mm |
| Sep | 23.0 °C | +0.3 °C | 156 mm | +4 mm |
| Oct | 25.5 °C | +0.9 °C | 32 mm | -26 mm |
| Nov | 25.6 °C | +1.2 °C | 0 mm | -8 mm |
| Dec | 25.2 °C | +1.2 °C | 0 mm | -3 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Ziway?
Ziway has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 20.7 °C and it receives 700 mm of precipitation per year.
What is the hottest day ever recorded in Ziway?
The hottest day measured in Ziway between 1940 and 2025 was 29 March 2016, reaching 32.1 °C.
What is the coldest day in Ziway?
The coldest day measured in Ziway between 1940 and 2025 was 18 January 1941, at 11.8 °C.
Does it snow in Ziway?
Almost never: Ziway sees virtually no snow, with about 0 frost days per year.
Has the climate of Ziway warmed?
Yes: Ziway warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ziway?
The wettest day measured in Ziway between 1940 and 2025 was 10 May 2016, with 71 mm of rain in 24 hours.
What was the windiest day in Ziway?
The windiest day measured in Ziway between 1940 and 2025 was 25 January 1974, with winds reaching 37.2 km/h.
What is the warmest month in Ziway?
The warmest month in Ziway is April (22.3 °C on average); the coldest is August (19.3 °C).
How much does it rain in Ziway?
Ziway receives on average 700 mm of precipitation per year, spread over about 118 rainy days.
Is it sunny in Ziway?
Ziway gets on average 10.8 hours of sunshine per day, roughly 3,942 hours per year over 1940-2025.
Are there tropical nights in Ziway?
Yes: Ziway has on average 21 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Ziway?
In Ziway, between 1940 and 2025, the highest apparent temperature reached 34.6 °C on 29 March 2016, and the lowest was 7.2 °C on 20 January 1987.
Compare Ziway with another city
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Nearby cities
The climate around Ziway