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January and February are the hottest months on the Kenyan coast and the Mombasa forum does not soften it: sunny and very hot by day, humid with it, cloud building in the evening and nights that stay warm. Posters describe sun loungers too hot to sit on, towels that heat through, and ground by the pool that wants sandals worn to the water's edge - the local habit is to be under a parasol or a tree through the middle of the day. What February buys is reliability: if you want guaranteed sunshine this is the month, with little falling, and what does come tends to be short, torrential and extremely local - raining on one beach and fine on the next. The record: 32C days that feel like 37C, 25.1C nights, 3.3 precipitation days, 11.1 hours of sun and a 28.1C sea.

Regulars are consistent this month runs noticeably drier than May, with the official cold season not starting until July - though regulars note it can already feel chillier by the back half of this month, a real preview of what's coming. Our row backs that warm, genuinely humid read, 29C reading as a hot 31C, over 22.7C nights, with 56.1mm of rain across 15.9 days and humidity at 79 percent. Regulars are specific that rain here can be genuinely localized, falling in one part of the coast while a nearby beach stays completely dry at the same time. When a shower does hit, regulars describe it as warm rain that dries quickly once the sun reappears. The sea sits at a warm, swimmable 27.4C. The record: 10.4 hours of sun, a 21.9 kph wind and AQI 36.

September here is described as fine weather with the occasional short shower, and notably not as hot as the rest of the year. Our rain figures say exactly that, in a way either number alone would hide: 44.8mm spread across 15.2 days is about three millimetres on each day it rains - frequent, brief, and not a reason to change a plan. Air is 28.7C but reads as 32C at 77.4 percent humidity, and the nights hold 22.6C. The sea is 26.6C. The caveat regulars add is about conditions rather than weather: it is windy now, 18.4 kph, so the water turns choppy and visibility drops - a better month for the beach than for diving. The record: 10.8 hours of sun and AQI 35.

Mombasa-forum threads on October weather call it genuinely good overall, comfortable temperatures in the 20s Celsius and posters describing conditions as easy t-shirt weather most days. Early October sits at the tail of the region's short-rains window, so a mixed pattern of cloud, brief showers and real sunshine is typical rather than a defining downpour - rain tends to pass through quickly, followed by a longer stretch of clear sky. Regulars call this one of the more reliable months on the coast, decent weather without either the peak heat or the heavier rains bracketing it. The record actually runs wetter than the forum's "rain at its lowest" framing suggests, a reminder that short-rains totals can add up even when individual showers feel brief and forgettable. The record: 29.5C days feeling like a sticky 34C, 23.8C nights, a notably high 95mm across 15.7 days, a 27.3C sea, 78 percent humidity and 10.7 hours of sun.

Asked to be honest about August, Mombasa regulars call it gorgeous - sunbathing weather with hardly any rain, often just the one day of warm rain across a stay. Our row looks like it flatly disagrees at 15.9 precipitation days, until you read the other number: 38.9mm across all of them, about two millimetres a wet day. The dataset is counting showers the forum does not bother to mention. What they do flag is that July and August are Kenya's winter - on this tropical coast that means warm humid days at 28.2C but evenings some visitors found genuinely cool, so a shawl or a light sweater earns its place - and that the sea gets choppy and cloudy now, so it is a better safari month than a snorkelling one. The record: 21.9C nights, humidity 78 percent, a 25.9C sea and AQI 36.