Our seasonal forecasts
Our seasonal forecasts help Eastern Africa prepare for the season and mitigate the effects of climate extremes.
June - September
Rainfall
Temperature
- Longest dry-spell lengths after onset expected over western Kenya, eastern Uganda, southern Ethiopia, northern Sudan.
- Much of the region is likely to experience first dry-spell length ranging from 4 to 8 days
- Longer wet-spell lengths after seasonal onset are expected over parts of northwestern Ethiopia, while shorter wet-spell lengths are anticipated over northeastern Ethiopia and Sudan
- The onset of rainfall shows a progression from south to north following the movement of the ITCZ.
- Enhanced probabilities of a late onset are indicated across much of the region. However, parts of southwestern, north-central Ethiopia, and parts of Sudan show likelihood of an early to near-normal onset
- Significantly higher likelihood for above-normal temperatures are indicated across the vast majority of the Greater Horn of Africa region.
- The highest probabilities of above-normal temperatures are concentrated over northern Sudan, most parts of South Sudan and Ethiopia
- Wettern than normal conditions indicated over parts of coastal Somalia and Kenya, northern Sudan, southern Ethiopia, and northern Somalia while near-normal conditions are expected over most of central Sudan.
- Enhanced likelihood Below-normal rainfall across much of the northern GHA, including South Sudan, Ethiopia, parts of Sudan, Eritrea, Djibouti, Uganda, and western Kenya.
Seasonal forecasts
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Length of dry spells
- The longest first dry spell after the onset is expected over Tanzania, eastern Kenya, and northern Somalia.
- The rest of the region is expected to record the first dry spell of between 2 and 8 …
Probability of 300 mm
- The highest chances of rainfall exceeding 300 mm are expected over southern and north-western Tanzania, Burundi, Uganda, western Kenya, and south-western Ethiopia.
Rainfall forecast (Total mm)
- Wetter than usual conditions expected over Uganda, western Kenya, South Sudan, Sudan, much of Ethiopia, Djibouti and Eritrea
Probability of 400 mm
- Highest probabilities of rainfall exceeding 400mm in western Ethiopia, South Sudan, northern Uganda, southern areas of Sudan.
Temperature forecast
- Warmer than usual conditions expected over the eastern and northern parts of the region
- Cooler than usual conditions expected over the western parts of the region
Length of wet spells
- Long continuous wet days (10 - 15 days) in South Sudan, south-western Ethiopia, Uganda, Burundi, Rwanda, and parts of Tanzania.
- Short wet spells over eastern Kenya, north-eastern Ethiopia, and parts of north-eastern Somalia.
Temperature forecast
- Warmer than usual conditions likely over eastern, north-eastern, and north-western parts of the country.
- Usual conditions likely over western and northern parts of the country.
- Cooler than usual conditions expected over southern and south-eastern parts …
Temperature forecast
- Warmer than usual conditions likely over central and northern parts of the country.
- Cooler than usual conditions likely over the southern parts of the country.
Temperature forecast
The season is expected to be warmer than usual in north-eastern Somalia, Djibouti, Eritrea, Sudan, north-eastern and north-western South Sudan, Rwanda, and eastern and central Ethiopia.
While the temperature is expected to be cooler than …
