This report describes the typical weather at the Nairobi (Jomo Kenyatta) International Airport (Nairobi, Kenya) weather station over the course of an average July. It is based on the historical records from 2003 to 2012. Earlier records are either unavailable or unreliable.
Nairobi has a mild temperate climate with dry winters and warm summers. The area within 25 mi of this station is covered by grasslands (53%), forests (33%), and croplands (12%).
The month of July is characterized by essentially constant daily high temperatures, with daily highs around 73°F throughout the month, exceeding 78°F or dropping below 68°F only one day in ten.
Over the course of July, the length of the day is essentially constant.
The earliest sunrise is at 6:35am on July 1; the latest sunset is at 6:40pm on July 25; the latest sunrise is at 6:38am on July 26; the earliest sunset is at 6:38pm on July 1.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover is 81% (mostly cloudy) and does not vary substantially over the course of the month.
On July 16, a representative day, the sky is clear or mostly clear 12% of the time, partly cloudy 22% of the time, and mostly cloudy or overcast 60% of the time.
The average probability that some form of precipitation will be observed in a given day is 22%, with little variation over the course of the month.
Throughout July, the most common forms of precipitation are light rain, drizzle, moderate rain, and thunderstorms.
Light rain is the most severe precipitation observed during 41% of those days with precipitation. It is most likely around July 12, when it is observed during 9% of all days.
Drizzle is the most severe precipitation observed during 33% of those days with precipitation. It is most likely around July 29, when it is observed during 8% of all days.
Moderate rain is the most severe precipitation observed during 13% of those days with precipitation. It is most likely around July 1, when it is observed during 3% of all days.
Thunderstorms are the most severe precipitation observed during 12% of those days with precipitation. They are most likely around July 1, when it is observed during 4% of all days.
Either snow is exceptionally unlikely to fall at this location in July or this station does not reliably report precipitation types.
The relative humidity typically ranges from 46% (comfortable) to 94% (very humid) over the course of a typical July, rarely dropping below 35% (comfortable) and reaching as high as 100% (very humid).
The air is driest around July 21, at which time the relative humidity drops below 52% (mildly humid) three days out of four; it is most humid around July 1, rising above 92% (very humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical July, the dew point typically varies from 49°F (dry) to 56°F (comfortable) and is rarely below 44°F (dry) or above 59°F (comfortable).
The time of the month between July 1 and July 31 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of July typical wind speeds vary from 0 mph to 13 mph (calm to moderate breeze), rarely exceeding 40 mph (gale).
The highest average wind speed of 7 mph (light breeze) occurs around July 10, at which time the average daily maximum wind speed is 13 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around July 31, at which time the average daily maximum wind speed is 13 mph (moderate breeze).