Average Weather in September in Juba South Sudan
Daily high temperatures increase by 2°F, from 88°F to 90°F, rarely falling below 83°F or exceeding 97°F.
Daily low temperatures are around 71°F, rarely falling below 69°F or exceeding 75°F.
For reference, on March 2, the hottest day of the year, temperatures in Juba typically range from 78°F to 102°F, while on August 5, the coldest day of the year, they range from 71°F to 86°F.
Average High and Low Temperature in September
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on September. 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 September
The month of September in Juba experiences rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 48% to 60%. The lowest chance of overcast or mostly cloudy conditions is 48% on September 2.
The clearest day of the month is September 2, with clear, mostly clear, or partly cloudy conditions 52% of the time.
For reference, on April 19, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 81%, while on September 2, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 52%.
Cloud Cover Categories in September
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 Juba, the chance of a wet day over the course of September is very rapidly decreasing, starting the month at 60% and ending it at 51%.
For reference, the year's highest daily chance of a wet day is 69% on August 12, and its lowest chance is 2% on January 22.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Juba is rapidly decreasing, starting the month at 4.9 inches, when it rarely exceeds 7.6 inches or falls below 1.9 inches, and ending the month at 3.8 inches, when it rarely exceeds 6.5 inches or falls below 1.2 inches.
Average Monthly Rainfall in September
Over the course of September in Juba, the length of the day is essentially constant. The shortest day of the month is September 30, with 12 hours, 5 minutes of daylight and the longest day is September 1, with 12 hours, 12 minutes of daylight.
Hours of Daylight and Twilight in September
The latest sunrise of the month in Juba is 6:47 AM on September 1 and the earliest sunrise is 6 minutes earlier at 6:41 AM on September 30.
The latest sunset is 6:59 PM on September 1 and the earliest sunset is 14 minutes earlier at 6:45 PM on September 30.
Daylight saving time is not observed in Juba during 2021.
For reference, on June 21, the longest day of the year, the Sun rises at 6:43 AM and sets 12 hours, 24 minutes later, at 7:07 PM, while on December 21, the shortest day of the year, it rises at 6:56 AM and sets 11 hours, 51 minutes later, at 6:47 PM.
Sunrise & Sunset with Twilight in September
The figure below presents a compact representation of key lunar data for September 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 September
The chance that a given day will be muggy in Juba is gradually decreasing during September, falling from 94% to 91% over the course of the month.
For reference, on August 12, the muggiest day of the year, there are muggy conditions 97% of the time, while on February 3, the least muggy day of the year, there are muggy conditions 3% of the time.
Humidity Comfort Levels in September
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Juba is essentially constant during September, remaining within 0.1 miles per hour of 4.5 miles per hour throughout.
For reference, on February 12, the windiest day of the year, the daily average wind speed is 8.1 miles per hour, while on July 19, the calmest day of the year, the daily average wind speed is 4.2 miles per hour.
Average Wind Speed in September
The hourly average wind direction in Juba throughout September is predominantly from the west, with a peak proportion of 47% on September 2.
Wind Direction in September
Temperatures in Juba 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 September
The average accumulated growing degree days in Juba are rapidly increasing during September, increasing by 835°F, from 7,466°F to 8,302°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Juba is essentially constant during September, remaining within 0.1 kWh of 5.9 kWh throughout.
The highest average daily incident shortwave solar energy during September is 6.0 kWh on September 14.
Average Daily Incident Shortwave Solar Energy in September
For the purposes of this report, the geographical coordinates of Juba are 4.852 deg latitude, 31.582 deg longitude, and 1,699 ft elevation.
The topography within 2 miles of Juba contains only modest variations in elevation, with a maximum elevation change of 279 feet and an average elevation above sea level of 1,603 feet. Within 10 miles contains only modest variations in elevation (1,001 feet). Within 50 miles contains very significant variations in elevation (3,163 feet).
The area within 2 miles of Juba is covered by artificial surfaces (99%), within 10 miles by shrubs (66%), and within 50 miles by shrubs (54%) and trees (27%).
This report illustrates the typical weather in Juba, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Juba is further than 200 kilometers from the nearest reliable weather station, so the weather-related data on this page were taken entirely from NASA's MERRA-2 satellite-era reanalysis . 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.
The temperature and dew point estimates are corrected for the difference between the reference elevation of the MERRA-2 grid cell and the elevation of Juba, according to the International Standard Atmosphere .
Time zones for airports and weather stations are provided by AskGeo.com .