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 dates
- Areas in western parts expected to record onset in September with eastern and southern areas expected to record onset from October and early November respectively.
Onset dates
- Western equatorial parts of the region to continue receiving rainfall through September.
- Onset expected in the north-eastern parts of the region in October, and move southwards reaching Tanzania in November.
Onset dates
Rains are expected to start late (compared to the 1981-2010 average onset) over Tanzania, Burundi, eastern Kenya, southern and central Somalia, and south-eastern Ethiopia. On the other hand, rains are expected to start earlier than …
Onset dates
- The onset of rainfall shows a progression from south to north following the movement of the ITCZ.
Onset dates
- The onset of rainfall forecast shows a progression from south to north from May over the equatorial sector to August over the far north.
Onset dates
- Onset expected from second week of March over western and south-western Kenya and progress northwards.
Onset dates
- Bi-Modal (areas that experience two seasons within the year) areas of Tanzania, Rwanda, and Burundi are expected to record onset from the second dekad of February.
- Uganda and Kenya are expected to record onset …
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 …
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 …