Average Weather in July in Nairobi Kenya
In Nairobi, the month of July is characterized by essentially constant daily high temperatures, with daily highs around 71°F throughout the month, rarely exceeding 77°F or dropping below 66°F. The lowest daily average high temperature is 71°F on July 21.
Daily low temperatures are around 55°F, rarely falling below 50°F or exceeding 58°F. The lowest daily average low temperature is 54°F on July 14.
For reference, on February 26, the hottest day of the year, temperatures in Nairobi typically range from 60°F to 81°F, while on July 14, the coldest day of the year, they range from 54°F to 71°F.
Average High and Low Temperature in July
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on July. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature in July
The month of July in Nairobi experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 57% to 52%.
The clearest day of the month is July 30, with clear, mostly clear, or partly cloudy conditions 48% of the time.
For reference, on April 17, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 74%, while on September 2, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 56%.
Cloud Cover in July
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Nairobi, the chance of a wet day over the course of July is essentially constant, remaining around 3% throughout.
For reference, the year's highest daily chance of a wet day is 48% on April 21, and its lowest chance is 3% on July 20.
Probability of Precipitation in July
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during July in Nairobi is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.4 inches or falling below -0.0 inches.
The lowest average 31-day accumulation is 0.1 inches on July 11.
Average Monthly Rainfall in July
Over the course of July in Nairobi, the length of the day is essentially constant. The shortest day of the month is July 1, with 12 hours, 3 minutes of daylight and the longest day is July 31, with 12 hours, 4 minutes of daylight.
Hours of Daylight and Twilight in July
The earliest sunrise of the month in Nairobi is 6:35 AM on July 1 and the latest sunrise is 2 minutes, 25 seconds later at 6:37 AM on July 25.
The earliest sunset is 6:38 PM on July 1 and the latest sunset is 2 minutes, 54 seconds later at 6:41 PM on July 28.
Daylight saving time is not observed in Nairobi during 2017.
For reference, on December 21, the longest day of the year, the Sun rises at 6:24 AM and sets 12 hours, 12 minutes later, at 6:36 PM, while on June 21, the shortest day of the year, it rises at 6:33 AM and sets 12 hours, 3 minutes later, at 6:36 PM.
Sunrise & Sunset with Twilight in July
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
The chance that a given day will be muggy in Nairobi is essentially constant during July, remaining around 0% throughout.
For reference, on March 31, the muggiest day of the year, there are muggy conditions 0% of the time, while on July 29, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in July
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed in Nairobi is essentially constant during July, remaining within 0.1 miles per hour of 3.9 miles per hour throughout.
For reference, on December 4, the windiest day of the year, the daily average wind speed is 5.9 miles per hour, while on June 17, the calmest day of the year, the daily average wind speed is 3.6 miles per hour.
Average Wind Speed in July
Wind Direction in July
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy in Nairobi is essentially constant during July, remaining within 0.1 kWh of 5.8 kWh throughout.
Average Daily Incident Shortwave Solar Energy in July
For the purposes of this report, the geographical coordinates of Nairobi are -1.283 deg latitude, 36.817 deg longitude, and 5,512 ft elevation.
The topography within 2 miles of Nairobi contains only modest variations in elevation, with a maximum elevation change of 404 feet and an average elevation above sea level of 5,541 feet. Within 10 miles contains only modest variations in elevation (1,608 feet). Within 50 miles contains very significant variations in elevation (10,722 feet).
The area within 2 miles of Nairobi is covered by artificial surfaces (66%) and trees (32%), within 10 miles by artificial surfaces (27%) and trees (26%), and within 50 miles by grassland (30%) and cropland (25%).
This report illustrates the typical weather in Nairobi year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Nairobi.
For each station, the records are corrected for the elevation difference between that station and Nairobi according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Nairobi is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Nairobi and a given station.
The stations contributing to this reconstruction are: Nairobi / Wilson (74%, 4.3 kilometers, south); Nairobi / Dagoretti (13%, 8 kilometers, west); Jomo Kenyatta International Airport (13%, 13 kilometers, east); and Nyeri Airport (0.8%, 89 kilometers, north).
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.