Nairobi is in for a warm week, but the capital is not expected to get much rain. The Kenya Meteorological Service Authority has put out its five-day outlook for October 18 to 22, 2026, and the picture is mostly sunny with a few surprises. Next week, Monday and Thursday are looking like the hottest days, with temperatures climbing to about 29°C.
If you are in town, the main thing to watch is Thursday night. The forecast shows a chance of light showers that evening, so it is wise to keep a small umbrella in your bag. Otherwise, the rest of the days should stay largely dry for most Nairobians.
Just outside the city, Kiambu will have plenty of sunshine for most of the week, with afternoon highs near 26°C. There may be a few light showers or brief rain on some afternoons and nights, especially on Monday and Tuesday. Kajiado will see a short spell of light rain on Wednesday afternoon, then dry weather for the rest of the time.
Moving west, Machakos will start its mornings clear, but light rain is likely during the day or at night on Tuesday and Wednesday. The town will be warm, with daytime highs around 29°C and nights dropping to roughly 13°C. Down at the coast, Mombasa is set for humid weather. Mornings will bring quick light showers before the sun comes out, and the city will peak at 31°C during the day and cool down to about 24°C at night.
Rain will be heavier in several other parts of the country. The weather office says at least five regions will get light to moderate showers, with thunderstorms in some places. Expect thunder and lightning in the afternoons and evenings across the western highlands, the Lake Victoria basin and parts of the Rift Valley. Kisumu County is among the places that will get the worst of it, with rain almost every afternoon and evening. Kisii, Nyamira, Homa Bay, Siaya, Bungoma and Vihiga are also set for similar wet spells.
Across most areas, daytime temperatures will be warm, between 27°C and 28°C. Nights will feel cooler, and early in the week some places could go as low as 10°C. So if you leave the house early or come back late, carry a light jacket.
The Acting Director of KMSA, Edward Muriuki, is urging people in the affected areas to keep checking the latest forecasts. He says staying updated will help families stay safe, protect their businesses and farms, and plan their days well. For traders, farmers and boda boda riders, keeping an eye on the weather this week is worth the effort.
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