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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Onset anomalies
- The season is expected to start 1-2 weeks early in northern Tanzania, northern Uganda, western and eastern Kenya, most of South Sudan, south-western Ethiopia, and southern Somalia.
- A late onset is expected over north-eastern Ethiopia …
Onset dates
- The season is expected to start 1-2 weeks early in northern Tanzania, northern Uganda, western and eastern Kenya, most of South Sudan, south-western Ethiopia, and southern Somalia.
- On the other hand, a late onset is …
Probability of 300 mm
- High probabilities (> 50%) of receiving more than 300 mm of rainfall during March-May 2021 over much of Tanzania, Rwanda, Burundi, western Kenya, Uganda, south-western South Sudan, and south-western Ethiopia.
Rainfall forecast (Total mm)
- Wetter than usual conditions likely over eastern and south eastern parts of the country.
- Usual conditions likely over most parts of the country.
- Drier than usual conditions likely over small area in the western parts …
Rainfall forecast (Total mm)
- Wetter than usual conditions likely over few areas in north-eastern parts of the country.
- Usual conditions expected over most parts of the country.
- Drier than usual conditions likely over small area in north-western part of …
Rainfall forecast (Total mm)
Headline: A wetter than usual season is expected over most farming areas in the central and southern parts of the region. While a drier than usual season is expected over north-eastern Ethiopia. The season is …
Temperature forecast
Press Release: http://bit.ly/2S5mu3U
Onset dates
Regarding the beginning of the season, earlier than usual start of rains is expected across most of the region, especially over northern Tanzania, northern Uganda, western and north-eastern Kenya, south-western Ethiopia, and southern Somalia. A …
Onset anomalies
Regarding the beginning of the season, earlier than usual start of rains is expected across most of the region, especially over northern Tanzania, northern Uganda, western and north-eastern Kenya, south-western Ethiopia, and southern Somalia. A …
Temperature forecast
- Warmer than usual temperatures expected over the region with the highest probabilities indicated over northern Sudan and parts of Ethiopia.
Temperature forecast
- Warmer than usual temperatures expected over the whole country.
Rainfall forecast
- Drier than usual conditions expected over most parts of the region with the highest probabilities over Ethiopia and South Sudan.
Temperature forecast
- Warmer than usual temperatures expected over the whole country with the highest temperatures over eastern areas.