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Summer Weather at Nyeri Airport Kenya

Daily high temperatures increase by 6°F, from 73°F to 79°F, rarely falling below 70°F or exceeding 83°F.

Daily low temperatures are around 53°F, rarely falling below 47°F or exceeding 58°F. The lowest daily average low temperature is 52°F on January 28.

For reference, on February 28, the hottest day of the year, temperatures at Nyeri Airport typically range from 53°F to 79°F, while on January 28, the coldest day of the year, they range from 52°F to 77°F.

Average High and Low Temperature in the Summer at Nyeri Airport

Average High and Low Temperature in the Summer at Nyeri AirportDecJanFeb45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°FSpringFallDec 173°FDec 173°F55°F55°FFeb 2879°FFeb 2879°F53°F53°FJan 175°FJan 175°F53°F53°FFeb 178°FFeb 178°F52°F52°F
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average summer temperatures. 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 the Summer at Nyeri Airport

Average Hourly Temperature in the Summer at Nyeri AirportDecJanFeb12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMSpringFallcoldcoolcoolcomfortablewarm
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 average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Volcano, Hawaii, United States (10,893 miles away) and Catacocha, Ecuador (8,060 miles) are the far-away foreign places with temperatures most similar to Nyeri Airport (view comparison).

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The summer at Nyeri Airport experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 61% to 67%. The lowest chance of overcast or mostly cloudy conditions is 61% on December 7.

The clearest day of the summer is December 7, with clear, mostly clear, or partly cloudy conditions 39% of the time.

For reference, on April 17, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 76%, while on September 1, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 53%.

Cloud Cover Categories in the Summer at Nyeri Airport

Cloud Cover Categories in the Summer at Nyeri AirportDecJanFeb0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SpringFallApr 1724%Apr 1724%Dec 139%Dec 139%Feb 2833%Feb 2833%Jan 136%Jan 136%Feb 134%Feb 134%clearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Nyeri Airport, the chance of a wet day over the course of the summer is very rapidly decreasing, starting the season at 45% and ending it at 19%.

For reference, the year's highest daily chance of a wet day is 69% on April 20, and its lowest chance is 14% on July 2.

Probability of Precipitation in the Summer at Nyeri Airport

Probability of Precipitation in the Summer at Nyeri AirportDecJanFeb0%0%10%10%20%20%30%30%40%40%50%50%60%60%SpringFallFeb 1315%Feb 1315%Dec 145%Dec 145%Feb 2819%Feb 2819%Jan 122%Jan 122%Feb 116%Feb 116%rain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the summer at Nyeri Airport is very rapidly decreasing, starting the season at 3.7 inches, when it rarely exceeds 6.9 inches or falls below 0.9 inches, and ending the season at 1.5 inches, when it rarely exceeds 3.5 inches or falls below 0.1 inches.

The lowest average 31-day accumulation is 1.0 inches on February 6.

Average Monthly Rainfall in the Summer at Nyeri Airport

Average Monthly Rainfall in the Summer at Nyeri AirportDecJanFeb0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 inSpringFallFeb 61.0 inFeb 61.0 inDec 13.7 inDec 13.7 inFeb 281.5 inFeb 281.5 inJan 11.6 inJan 11.6 in
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Over the course of the summer at Nyeri Airport, the length of the day is essentially constant. The shortest day of the summer is February 28, with 12 hours, 7 minutes of daylight and the longest day is December 21, with 12 hours, 9 minutes of daylight.

Hours of Daylight and Twilight in the Summer at Nyeri Airport

Hours of Daylight and Twilight in the Summer at Nyeri AirportDecJanFeb0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrSpringFallDec 2112 hr, 9 minDec 2112 hr, 9 mindaydaydaydaynightFeb 2812 hr, 7 minFeb 2812 hr, 7 minFeb 112 hr, 8 minFeb 112 hr, 8 min
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the summer at Nyeri Airport is 6:16 AM on December 1 and the latest sunrise is 26 minutes later at 6:42 AM on February 12.

The earliest sunset is 6:25 PM on December 1 and the latest sunset is 25 minutes later at 6:50 PM on February 9.

Daylight saving time is not observed at Nyeri Airport during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 6:25 AM and sets 12 hours, 9 minutes later, at 6:34 PM, while on June 20, the shortest day of the year, it rises at 6:30 AM and sets 12 hours, 6 minutes later, at 6:36 PM.

Sunrise & Sunset with Twilight in the Summer at Nyeri Airport

Sunrise & Sunset with Twilight in the Summer at Nyeri AirportDecJanFeb2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMSpringFall6:16 AM6:16 AMDec 16:25 PMDec 16:25 PM6:42 AM6:42 AMFeb 96:50 PMFeb 96:50 PM6:41 AM6:41 AMFeb 286:48 PMFeb 286:48 PM6:31 AM6:31 AMJan 16:40 PMJan 16:40 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day in the summer. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in the Summer at Nyeri Airport

Solar Elevation and Azimuth in the Summer at Nyeri AirportDecJanFeb12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMSpringFall00102020303040505060608000101020303040405060607070
northeastsouthwest
Solar elevation and azimuth in the the summer of 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for the summer of 2024. 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 the Summer at Nyeri Airport

Moon Rise, Set & Phases in the Summer at Nyeri AirportDecJanFeb12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMSpringFallNov 13:48 PMNov 13:48 PMNov 1612:29 AMNov 1612:29 AMDec 19:22 AMDec 19:22 AMDec 1512:02 PMDec 1512:02 PMDec 311:28 AMDec 311:28 AMJan 141:28 AMJan 141:28 AMJan 293:37 PMJan 293:37 PMFeb 124:54 PMFeb 124:54 PMFeb 283:45 AMFeb 283:45 AMMar 149:55 AMMar 149:55 AMMar 291:58 PMMar 291:58 PM6:16 PM6:16 PM5:57 PM5:57 PM6:26 AM6:26 AM6:10 AM6:10 AM5:40 PM5:40 PM6:10 AM6:10 AM7:18 PM7:18 PM6:29 PM6:29 PM6:56 AM6:56 AM6:28 AM6:28 AM6:57 PM6:57 PM6:54 PM6:54 PM7:15 AM7:15 AM7:18 PM7:18 PM6:16 PM6:16 PM6:36 AM6:36 AM6:44 PM6:44 PM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

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 at Nyeri Airport is essentially constant during the summer, remaining around 0% throughout.

For reference, on January 17, the muggiest day of the year, there are muggy conditions 0% of the time, while on July 7, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in the Summer at Nyeri Airport

Humidity Comfort Levels in the Summer at Nyeri AirportDecJanFeb0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%SpringFallJan 170%Jan 170%Dec 10%Dec 10%Feb 280%Feb 280%Jan 10%Jan 10%Feb 10%Feb 10%humidhumidcomfortablecomfortabledrydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

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 at Nyeri Airport is essentially constant during the summer, remaining within 0.3 miles per hour of 7.5 miles per hour throughout.

For reference, on October 20, the windiest day of the year, the daily average wind speed is 8.4 miles per hour, while on June 17, the calmest day of the year, the daily average wind speed is 6.6 miles per hour.

The lowest daily average wind speed during the summer is 7.2 miles per hour on January 4.

Average Wind Speed in the Summer at Nyeri Airport

Average Wind Speed in the Summer at Nyeri AirportDecJanFeb0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mphSpringFallJan 47.2 mphJan 47.2 mphDec 17.7 mphDec 17.7 mphFeb 287.8 mphFeb 287.8 mphFeb 17.3 mphFeb 17.3 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction at Nyeri Airport throughout the summer is predominantly from the east, with a peak proportion of 94% on December 1.

Wind Direction in the Summer at Nyeri Airport

Wind Direction in the Summer at Nyeri AirportDecJanFeb0%100%20%80%40%60%60%40%80%20%100%0%SpringFalleastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

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 at Nyeri Airport 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 the Summer at Nyeri Airport

Time Spent in Various Temperature Bands and the Growing Season in the Summer at Nyeri AirportDecJanFeb0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SpringFall100%Jan 15100%Jan 15coldcoolcomfortablewarm
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 percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

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 at Nyeri Airport are very rapidly increasing during the summer, increasing by 1,267°F, from 1,955°F to 3,222°F, over the course of the season.

Growing Degree Days in the Summer at Nyeri Airport

Growing Degree Days in the Summer at Nyeri AirportDecJanFeb2,000°F2,000°F2,200°F2,200°F2,400°F2,400°F2,600°F2,600°F2,800°F2,800°F3,000°F3,000°F3,200°F3,200°F3,400°F3,400°FSpringFallDec 11,955°FDec 11,955°FFeb 283,222°FFeb 283,222°FJan 12,371°FJan 12,371°FFeb 12,810°FFeb 12,810°F
The average growing degree days accumulated over the course of the summer, with 25th to 75th and 10th to 90th percentile bands.

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 at Nyeri Airport is increasing during the summer, rising by 1.0 kWh, from 6.5 kWh to 7.5 kWh, over the course of the season.

Average Daily Incident Shortwave Solar Energy in the Summer at Nyeri Airport

Average Daily Incident Shortwave Solar Energy in the Summer at Nyeri AirportDecJanFeb0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhSpringFallDec 16.5 kWhDec 16.5 kWhFeb 287.5 kWhFeb 287.5 kWhJan 16.8 kWhJan 16.8 kWhFeb 17.3 kWhFeb 17.3 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Nyeri Airport are -0.372 deg latitude, 36.981 deg longitude, and 5,823 ft elevation.

The topography within 2 miles of Nyeri Airport contains significant variations in elevation, with a maximum elevation change of 538 feet and an average elevation above sea level of 5,759 feet. Within 10 miles contains significant variations in elevation (2,280 feet). Within 50 miles contains large variations in elevation (13,461 feet).

The area within 2 miles of Nyeri Airport is covered by cropland (51%) and trees (46%), within 10 miles by cropland (46%) and trees (42%), and within 50 miles by trees (36%) and cropland (34%).

This report illustrates the typical weather at Nyeri Airport, 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

Nyeri Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back are Embu Airport, Jomo Kenyatta International Airport, Nairobi / Dagoretti, Nairobi / Wilson, Nakuru Airport, Meru, Narok, and Kericho Airport.

Other Data

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 © OpenStreetMap contributors.

Disclaimer

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.

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