
GENERAL SITUATION
The 2025/2026 rain season will be influenced by two key global climate drivers: the El Niño–Southern Oscillation (ENSO), which is currently in a neutral phase but is expected to shift toward a weak La Niña, and the Indian Ocean Dipole (IOD), which is currently negative.
A neutral ENSO typically supports average rainfall across Zambia, while a weak La Niña tends to enhance precipitation, increasing the likelihood of above-normal rainfall. The negative IOD may delay the onset of rains, particularly in northeastern parts of the country.
Overall, the season is expected to be near normal, with increased chances of above-normal rainfall during December, January, and February. However, intermittent dry spells may occur.
The rainy season is expected to begin in October across Northwestern and Luapula Provinces, as well as the eastern parts of Copperbelt and Northern Provinces, and the northern areas of Western Province.
Most other regions are likely to see the onset in November. In December, rainfall onset is anticipated in districts including Sinazongwe, Siavonga, Chirundu, Gwembe, Rufunsa, Luangwa, Chisamba, Kabwe, Luano, Chitambo, Lavushimanda, Mpika, Chasefu, Chama, Isoka, Chinsali, Mafinga, and Nakonde.
DETAILED FORECAST FOR THE 2025/2026 RAIN SEASON
October, November, December (OND) Rainfall Forecast:
Normal to above-normal rainfall is expected across most areas in Northwestern, Western, Southern, and Lusaka Provinces. Similar conditions are likely in the western parts of Central Province, including Nyimba, Petauke, Sinda, and Katete districts, as well as in the far northern regions of Luapula and Northern Provinces.
In contrast, Copperbelt, Muchinga, and parts of Central, Eastern, Luapula, and Northern Provinces are forecast to get normal to below-normal rainfall (see Figure 1).

November, December, January
(NDJ) Rainfall Forecast:
Normal to above-normal rainfall is expected in Western, Southern, Lusaka, Luapula, and Northern Provinces. This pattern also extends to the western parts of Central Province, the northern areas of Muchinga Province, and Ikelenge District.
In contrast, normal to below-normal rainfall is likely across Copperbelt Province, much of Northwestern and Eastern Provinces, the southern parts of Muchinga Province, and the eastern areas of Central Province (see Figure 2).

December, January, February
(DJF) Rainfall Forecast:
Normal to above-normal rainfall is expected across the country, with an increased risk of flash floods and flooding in vulnerable areas (see Figure 3)

January, February, March (JFM)
Rainfall Forecast:
The northern half of the country is likely to receive normal to above-normal rainfall. However, Western and Southern Provinces, as well as the western parts of Lusaka and Central Provinces, are expected to experience normal to below-normal rainfall (see Figure 4).

LIKELY START OF THE 2025/2026 SEASON
Rainfall is expected to begin in October across parts of Western, Northwestern, Copperbelt, Luapula, and Northern Provinces.
However, most areas over Zambia will see onset in November.
Moreover, a delayed start is likely in several districts, such as Sinazongwe, Siavonga, Chirundu, Gwembe, Rufunsa, Luangwa, Chisamba, Kabwe, Luano, Chitambo, Lavushimanda, Mpika, Chasefu, Chama, Isoka, Chinsali, Mafinga, and Nakonde, where rains are expected in December 2025 (see Figure 5).

LIKELY END OF THE 2025/2026 SEASON
Rainfall is expected to cease around mid-March in southern Zambia, while northern regions are likely to continue receiving rain until mid-April (see Figure 6).

TAKE NOTE:
ABOVE NORMAL: Rainfall greater than 125% of the average for the period 1981 to 2020
(OND) & 1981 to 2020 (JFM)
NORMAL: Rainfall between 75% and 125% of the average for the period 1981 to
2020 (OND) & 1981 to 2020 (JFM)
BELOW NORMAL: Rainfall less than 75% of the average for the period 1981 to 2020
(OND) & 1981 to 2020 (JFM)
PLEASE NOTE:
This seasonal forecast provides a general overview based on three-month averages. It is helpful for long term planning but may not accurately reflect daily or weekly rainfall patterns. Heavy rainfall periods can lead to flash floods while dry spells can lead to water deficits. It is necessary to regularly check our Daily, Weekly, and 10-day Agrometeorological Bulletins for the most up-to-date information. We will
review this forecast monthly and provide updates. If you have any questions or need further assistance, please contact the Director of Meteorology at the Ministry of Green Economy and Environment.
HISTORICAL AVERAGE/ NORMAL RAINFALL (1981 – 2020)


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