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Average Weather in Arua Uganda

In Arua, the summers are short, hot, and overcast and the winters are long, comfortable, humid, wet, and mostly cloudy. Over the course of the year, the temperature typically varies from 62°F to 92°F and is rarely below 59°F or above 97°F.

Based on the tourism score, the best times of year to visit Arua for warm-weather activities are from mid June to late September and from late November to mid January.

Climate Summary

hotwarmJanFebMarAprMayJunJulAugSepOctNovDec47%47%15%15%overcastclearprecipitation: 6.9 inprecipitation: 6.9 in0.5 in0.5 inmuggy: 62%muggy: 62%1%1%drydrytourism score: 6.1tourism score: 6.14.14.1
Click on each chart for more information.

Temperature

The hot season lasts for 2.0 months, from January 24 to March 26, with an average daily high temperature above 89°F. The hottest day of the year is March 1, with an average high of 92°F and low of 67°F.

The cool season lasts for 6.4 months, from May 10 to November 23, with an average daily high temperature below 81°F. The coldest day of the year is July 14, with an average low of 62°F and high of 78°F.

Average High and Low Temperature

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 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

Average Hourly Temperature in AruaJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMcoolcomfortablecomfortablewarmhotcool
The average hourly temperature, color coded into bands: 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 shaded overlays indicate night and civil twilight.

Berlín, El Salvador (8,142 miles away); Nirgua, Venezuela (6,832 miles); and Balagon, Philippines (6,355 miles) are the far-away foreign places with temperatures most similar to Arua (view comparison).

Clouds

In Arua, 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 Arua begins around June 27 and lasts for 3.1 months, ending around September 30. On August 31, 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 30 and lasts for 8.9 months, ending around June 27. On April 2, the cloudiest day of the year, the sky is overcast or mostly cloudy 85% of the time, and clear, mostly clear, or partly cloudy 15% of the time.

Cloud Cover Categories

Cloud Cover Categories in AruaclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 3147%Aug 3147%Apr 215%Apr 215%Jun 2731%Jun 2731%Sep 3031%Sep 3031%clearmostly clearpartly cloudymostly cloudyovercast
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Arua varies very significantly throughout the year.

The wetter season lasts 8.1 months, from March 21 to November 24, with a greater than 39% chance of a given day being a wet day. The chance of a wet day peaks at 69% on October 10.

The drier season lasts 3.9 months, from November 24 to March 21. The smallest chance of a wet day is 8% 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 69% on October 10.

Daily Chance of Precipitation

Daily Chance of Precipitation in AruawetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Oct 1069%Oct 1069%Jan 218%Jan 218%Jan 19%Jan 19%Mar 2139%Mar 2139%Nov 2439%Nov 2439%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 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. Arua experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Arua. The most rain falls during the 31 days centered around October 20, with an average total accumulation of 6.9 inches.

The least rain falls around January 15, with an average total accumulation of 0.5 inches.

Average Monthly Rainfall

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 liquid-equivalent snowfall.

Sun

The length of the day in Arua does not vary substantially over the course of the year, staying within 17 minutes of 12 hours throughout. In 2018, the shortest day is December 22, with 11 hours, 57 minutes of daylight; the longest day is June 21, with 12 hours, 18 minutes of daylight.

Hours of Daylight and Twilight

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 is at 6:39 AM on October 29, and the latest sunrise is 31 minutes later at 7:10 AM on February 6. The earliest sunset is at 6:39 PM on November 7, and the latest sunset is 31 minutes later at 7:11 PM on February 17.

Daylight saving time (DST) is not observed in Arua during 2018.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in AruaJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMOct 296:39 AMOct 296:39 AM7:11 PMFeb 177:11 PMFeb 17Nov 76:39 PMNov 76:39 PM7:10 AMFeb 67:10 AMFeb 6daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2018. 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.

Humidity

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.

Arua experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 8.8 months, from March 15 to December 8, during which time the comfort level is muggy, oppressive, or miserable at least 17% of the time. The muggiest day of the year is May 6, with muggy conditions 62% of the time.

The least muggy day of the year is January 27, with muggy conditions 1% of the time.

Humidity Comfort Levels

Humidity Comfort Levels in AruamuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jan 271%Jan 271%May 662%May 662%Mar 1517%Mar 1517%Dec 817%Dec 817%muggymuggyhumidhumidcomfortablecomfortabledrydry
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Arua experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 4.4 months, from November 25 to April 7, with average wind speeds of more than 5.6 miles per hour. The windiest day of the year is February 5, with an average hourly wind speed of 7.2 miles per hour.

The calmer time of year lasts for 7.6 months, from April 7 to November 25. The calmest day of the year is July 19, with an average hourly wind speed of 4.0 miles per hour.

Average Wind Speed

Average Wind Speed in AruawindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mph8 mph9 mph10 mph11 mphFeb 57.2 mphFeb 57.2 mphJul 194.0 mphJul 194.0 mphNov 255.6 mphNov 255.6 mphApr 75.6 mphApr 75.6 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Arua varies throughout the year.

The wind is most often from the east for 2.6 months, from February 5 to April 23 and for 2.4 months, from October 15 to December 27, with a peak percentage of 54% on November 28. The wind is most often from the south for 2.1 months, from April 23 to June 25, with a peak percentage of 41% on May 26. The wind is most often from the west for 3.7 months, from June 25 to October 15, with a peak percentage of 44% on September 17.

Wind Direction

Wind Direction in AruaNESWEJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westsoutheastnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

To characterize how pleasant the weather is in Arua 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 Arua for general outdoor tourist activities are from mid June to late September and from late November to mid January, with a peak score in the last week of August.

Tourism Score

Tourism Score in Aruabest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.16.14.14.15.95.95.05.0precipitationprecipitationcloudscloudstourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Arua for hot-weather activities is from late November to mid March, with a peak score in the first week of February.

Beach/Pool Score

Beach/Pool Score in Aruabest timeJanFebMarAprMayJunJulAugSepOctNovDec02468105.65.64.14.14.94.94.44.4precipitationprecipitationcloudscloudstemperaturetemperaturebeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

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.

Growing Season

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 Arua 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

Time Spent in Various Temperature Bands and the Growing Season in AruaJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%100%Jan 1100%Jan 1100%Jul 3100%Jul 3coolcomfortablewarmhotsweltering
The percentage of time spent in various temperature bands: 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 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.

Growing Degree Days

Growing Degree Days in AruaJanFebMarAprMayJunJulAugSepOctNovDec0°F1,000°F2,000°F3,000°F4,000°F5,000°F6,000°F7,000°F8,000°FJan 590°FJan 590°FMar 121,800°FMar 121,800°FDec 318,114°FDec 318,114°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 2.1 months, from January 14 to March 17, with an average daily incident shortwave energy per square meter above 6.2 kWh. The brightest day of the year is February 17, with an average of 6.5 kWh.

The darker period of the year lasts for 3.3 months, from April 29 to August 6, with an average daily incident shortwave energy per square meter below 5.2 kWh. The darkest day of the year is June 6, with an average of 4.9 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in AruabrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWhFeb 176.5 kWhFeb 176.5 kWhJun 64.9 kWhJun 64.9 kWhAug 65.2 kWhAug 65.2 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.

Topography

For the purposes of this report, the geographical coordinates of Arua are 3.020 deg latitude, 30.911 deg longitude, and 3,917 ft elevation.

The topography within 2 miles of Arua contains only modest variations in elevation, with a maximum elevation change of 377 feet and an average elevation above sea level of 3,934 feet. Within 10 miles contains only modest variations in elevation (1,680 feet). Within 50 miles contains very significant variations in elevation (4,364 feet).

The area within 2 miles of Arua is covered by cropland (86%), within 10 miles by cropland (82%), and within 50 miles by shrubs (42%) and cropland (34%).

Data Sources

This report illustrates the typical weather in Arua, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Arua 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 Arua, 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 Tables of the Sun, Moon and Planets , 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 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.

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.