Climate and Average Weather Year Round in Fort Portal Uganda
The climate in Fort Portal is warm and overcast. Over the course of the year, the temperature typically varies from 58°F to 81°F and is rarely below 56°F or above 87°F.
Based on the tourism score, the best times of year to visit Fort Portal for warm-weather activities are from early June to late September and from mid December to late January.
Climate in Fort Portal
Average Temperature in Fort Portal
The temperature in Fort Portal varies so little throughout the year that it is not entirely meaningful to discuss hot and cold seasons.
Average High and Low Temperature in Fort Portal
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, 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 Fort Portal
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
In Fort Portal, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in Fort Portal begins around June 15 and lasts for 3.2 months, ending around September 22. On August 15, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 47% of the time, and overcast or mostly cloudy 53% of the time.
The cloudier part of the year begins around September 22 and lasts for 8.8 months, ending around June 15. On April 19, the cloudiest day of the year, the sky is overcast or mostly cloudy 84% of the time, and clear, mostly clear, or partly cloudy 16% of the time.
Cloud Cover Categories in Fort Portal
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. The chance of wet days in Fort Portal varies very significantly throughout the year.
The wetter season lasts 8.9 months, from March 15 to December 11, with a greater than 52% chance of a given day being a wet day. The chance of a wet day peaks at 81% on November 5.
The drier season lasts 3.1 months, from December 11 to March 15. The smallest chance of a wet day is 24% on January 21.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 81% on November 5.
Daily Chance of Precipitation in Fort Portal
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Fort Portal experiences extreme seasonal variation in monthly rainfall.
Rain falls throughout the year in Fort Portal. The most rain falls during the 31 days centered around November 2, with an average total accumulation of 5.8 inches.
The least rain falls around January 29, with an average total accumulation of 1.5 inches.
Average Monthly Rainfall in Fort Portal
The length of the day in Fort Portal does not vary substantially over the course of the year, staying within 9 minutes of 12 hours throughout. In 2021, the shortest day is December 21, with 12 hours, 5 minutes of daylight; the longest day is June 21, with 12 hours, 10 minutes of daylight.
Hours of Daylight and Twilight in Fort Portal
The earliest sunrise is at 6:39 AM on November 3, and the latest sunrise is 31 minutes later at 7:10 AM on February 10. The earliest sunset is at 6:45 PM on November 4, and the latest sunset is 31 minutes later at 7:15 PM on February 11.
Daylight saving time (DST) is not observed in Fort Portal during 2021.
Sunrise & Sunset with Twilight in Fort Portal
The figure below presents a compact representation of key lunar data for 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.
Moon Rise, Set & Phases in Fort Portal
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.
Fort Portal experiences some seasonal variation in the perceived humidity.
The muggier period of the year lasts for 7.5 months, from October 17 to June 2, during which time the comfort level is muggy, oppressive, or miserable at least 3% of the time. The muggiest day of the year is April 25, with muggy conditions 13% of the time.
The least muggy day of the year is July 21, when muggy conditions are essentially unheard of.
Humidity Comfort Levels in Fort Portal
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 Fort Portal experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 3.6 months, from December 1 to March 21, with average wind speeds of more than 4.1 miles per hour. The windiest day of the year is February 2, with an average hourly wind speed of 4.6 miles per hour.
The calmer time of year lasts for 8.4 months, from March 21 to December 1. The calmest day of the year is October 11, with an average hourly wind speed of 3.5 miles per hour.
Average Wind Speed in Fort Portal
The predominant average hourly wind direction in Fort Portal varies throughout the year.
The wind is most often from the west for 2.3 months, from January 12 to March 21 and for 4.0 weeks, from September 14 to October 12, with a peak percentage of 37% on October 8. The wind is most often from the east for 1.9 weeks, from March 21 to April 3; for 1.0 months, from August 14 to September 14; and for 2.3 months, from October 12 to December 22, with a peak percentage of 43% on November 20. The wind is most often from the south for 4.4 months, from April 3 to August 14, with a peak percentage of 49% on May 18.
Wind Direction in Fort Portal
Best Time of Year to Visit
To characterize how pleasant the weather is in Fort Portal throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Fort Portal for general outdoor tourist activities are from early June to late September and from mid December to late January, with a peak score in the third week of July.
Tourism Score in Fort Portal
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best times of year to visit Fort Portal for hot-weather activities are from early August to early September and from late December to mid March, with a peak score in the second week of February.
Beach/Pool Score in Fort Portal
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
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 Fort Portal 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 Fort Portal
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.
Growing Degree Days in Fort Portal
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 experiences some seasonal variation over the course of the year.
The brighter period of the year lasts for 1.7 months, from January 19 to March 10, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest day of the year is February 11, with an average of 6.2 kWh.
The darker period of the year lasts for 1.4 months, from October 7 to November 19, with an average daily incident shortwave energy per square meter below 5.1 kWh. The darkest day of the year is October 25, with an average of 4.8 kWh.
Average Daily Incident Shortwave Solar Energy in Fort Portal
For the purposes of this report, the geographical coordinates of Fort Portal are 0.662 deg latitude, 30.275 deg longitude, and 4,980 ft elevation.
The topography within 2 miles of Fort Portal contains only modest variations in elevation, with a maximum elevation change of 364 feet and an average elevation above sea level of 5,012 feet. Within 10 miles contains only modest variations in elevation (6,211 feet). Within 50 miles also contains extreme variations in elevation (14,636 feet).
The area within 2 miles of Fort Portal is covered by cropland (86%), within 10 miles by cropland (72%) and trees (13%), and within 50 miles by trees (44%) and cropland (29%).
This report illustrates the typical weather in Fort Portal, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Fort Portal 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 Fort Portal, according to the International Standard Atmosphere .
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.
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.