January Weather in Kiambu Kenya
Daily high temperatures increase by 3°F, from 76°F to 78°F, rarely falling below 72°F or exceeding 82°F.
Daily low temperatures are around 58°F, rarely falling below 53°F or exceeding 62°F. The lowest daily average low temperature is 58°F on January 28.
For reference, on February 26, the hottest day of the year, temperatures in Kiambu typically range from 59°F to 80°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 January in Kiambu
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on January. 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 January in Kiambu
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The month of January in Kiambu experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 68% throughout the month.
The clearest day of the month is January 1, with clear, mostly clear, or partly cloudy conditions 34% of the time.
For reference, on April 18, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 75%, while on September 2, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 55%.
Cloud Cover Categories in January in Kiambu
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Kiambu, the chance of a wet day over the course of January is rapidly decreasing, starting the month at 20% and ending it at 14%.
For reference, the year's highest daily chance of a wet day is 50% on April 21, and its lowest chance is 3% on July 20.
Probability of Precipitation in January in Kiambu
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 January in Kiambu is decreasing, starting the month at 1.5 inches, when it rarely exceeds 4.2 inches, and ending the month at 0.9 inches, when it rarely exceeds 2.5 inches.
Average Monthly Rainfall in January in Kiambu
Over the course of January in Kiambu, the length of the day is essentially constant. The shortest day of the month is January 31, with 12 hours, 10 minutes of daylight and the longest day is January 1, with 12 hours, 11 minutes of daylight.
Hours of Daylight and Twilight in January in Kiambu
The earliest sunrise of the month in Kiambu is 6:30 AM on January 1 and the latest sunrise is 11 minutes later at 6:41 AM on January 31.
The earliest sunset is 6:42 PM on January 1 and the latest sunset is 9 minutes later at 6:51 PM on January 31.
Daylight saving time is not observed in Kiambu during 2021.
For reference, on December 21, the longest day of the year, the Sun rises at 6:25 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 6:32 AM and sets 12 hours, 3 minutes later, at 6:36 PM.
Sunrise & Sunset with Twilight in January in Kiambu
The figure below presents a compact representation of key lunar data for January 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.
Moon Rise, Set & Phases in January in Kiambu
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 Kiambu is essentially constant during January, remaining around 0% throughout.
For reference, on March 28, the muggiest day of the year, there are muggy conditions 0% of the time, while on July 19, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in January in Kiambu
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 Kiambu is essentially constant during January, remaining within 0.2 miles per hour of 10.2 miles per hour throughout.
For reference, on December 4, the windiest day of the year, the daily average wind speed is 10.8 miles per hour, while on June 17, the calmest day of the year, the daily average wind speed is 6.6 miles per hour.
Average Wind Speed in January in Kiambu
The hourly average wind direction in Kiambu throughout January is predominantly from the east, with a peak proportion of 85% on January 1.
Wind Direction in January in Kiambu
Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).
Temperatures in Kiambu are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season in January in Kiambu
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.
The average accumulated growing degree days in Kiambu are rapidly increasing during January, increasing by 509°F, from 2,671°F to 3,181°F, over the course of the month.
Growing Degree Days in January in Kiambu
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 Kiambu is essentially constant during January, remaining within 0.2 kWh of 7.1 kWh throughout.
Average Daily Incident Shortwave Solar Energy in January in Kiambu
For the purposes of this report, the geographical coordinates of Kiambu are -1.167 deg latitude, 36.833 deg longitude, and 5,587 ft elevation.
The topography within 2 miles of Kiambu contains significant variations in elevation, with a maximum elevation change of 728 feet and an average elevation above sea level of 5,601 feet. Within 10 miles contains significant variations in elevation (2,415 feet). Within 50 miles contains large variations in elevation (10,440 feet).
The area within 2 miles of Kiambu is covered by cropland (62%) and trees (22%), within 10 miles by cropland (44%) and trees (26%), and within 50 miles by cropland (29%) and grassland (28%).
This report illustrates the typical weather in Kiambu, 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 Kiambu.
For each station, the records are corrected for the elevation difference between that station and Kiambu 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 Kiambu is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Kiambu and a given station.
The stations contributing to this reconstruction are: Nairobi / Wilson (HKNW, 38%, 17 kilometers, south); Nairobi / Dagoretti (HKNC, 31%, 18 kilometers, southwest); Jomo Kenyatta International Airport (HKJK, 27%, 20 kilometers, southeast); and Nyeri Airport (HKNI, 4.1%, 76 kilometers, north).
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports 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.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.
We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.