Weatherman Issues Seven-Day Rain Warning for 19 Counties as Low Temperatures Hit Nairobi

The Kenya Meteorological Department (KMD) released a seven-day weather forecast covering July 21 to July 27, 2026. The weekly report indicates that rainfall will fall across 19 counties, while most other regions stay dry.

Forecasters confirmed that afternoon showers and thunderstorms will affect several western regions and parts of the Rift Valley. Affected areas include Bungoma, Trans Nzoia, Kakamega, Kericho, Kisii, Nakuru, Busia, Siaya, Kisumu, and Homa Bay.

Rainfall will also hit Narok, Bomet, Nyamira, Vihiga, Uasin Gishu, Nandi, Migori, Lamu, and Nyandarua. In coastal areas such as Mombasa, Kilifi, Kwale, and Lamu, morning showers will occur before giving way to sunny afternoons.

Heavy precipitation poses direct operational challenges for regional civil engineering projects. Contractors handling active earthworks and unpaved site access roads in these areas face potential delays from mud, reduced traction, and waterlogging.

Site engineers managing deep excavations must keep dewatering pumps on standby to clear flooded trenches. Meanwhile, concrete batching schedules need close monitoring, because unexpected downpours wash away fresh cement mixes and weaken structural curing.

In contrast, central regions will experience prolonged cool and cloudy conditions throughout the week. Counties under this cold forecast include Nairobi, Kiambu, Kirinyaga, Laikipia, Meru, Murang'a, Nyeri, and Tharaka-Nithi.

Meteorologists expect minimum temperatures to drop below 10°C in several highland towns during the night. Nyahururu town will record the lowest national temperature at 5°C, while Eldoret and Laikipia will record lows around 9°C.

Nairobi will record nighttime lows of 10°C alongside persistent morning cloud cover. These low temperatures slow down the setting time of poured concrete on elevated building frames across the Central Business District (CBD).

Cold weather also affects outdoor labor productivity during early morning shifts on structural steel projects. Project managers often supply thermal working gear to protect site crews from respiratory illness during winter weather windows.

The forecast noted that recent weather patterns between July 13 and July 19 were mostly dry nationwide. Rain during that previous period remained confined to Trans Nzoia, Kakamega, Bungoma, Uasin Gishu, Kericho, and Kisii counties.

For transport infrastructure contractors along major corridors, dry weather in northern and eastern counties offers stable conditions. Regions such as Garissa, Mandera, Wajir, and Turkana will experience mostly sunny afternoons with high daytime temperatures.

Road construction crews working under the Kenya Urban Roads Authority (KURA) can maintain asphalt paving in these dry regions without weather disruptions. High daytime temperatures accelerate bituminous curing and allow heavy machinery to operate without sinking into wet subgrades.

However, drainage maintenance teams operating in urban centers must remain on high alert for sudden afternoon storms. Storm drains clogged with construction debris lead to localized flash floods on primary urban arterial routes.

Project managers across the nineteen designated counties should review daily weather updates from KMD before scheduling critical outdoor works. Taking precautions on site drainage and crew safety limits financial losses during unseasonal weather shifts.