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Average Weather in Leer South Sudan

In Leer, the wet season is hot, oppressive, and overcast and the dry season is sweltering and partly cloudy. Over the course of the year, the temperature typically varies from 70°F to 105°F and is rarely below 65°F or above 110°F.

Climate Summary

swelteringhotswelteringJanFebMarAprMayJunJulAugSepOctNovDec49%49%25%25%overcastclearprecipitation: 5.9 inprecipitation: 5.9 in0.0 in0.0 inmuggy: 99%muggy: 99%0%0%drydrybeach/pool score: 6.6beach/pool score: 6.64.14.1
Click on each chart for more information.

Based on the beach/pool score, the best time of year to visit Leer for hot-weather activities is from late October to mid February.

Temperature

The hot season lasts for 2.9 months, from January 27 to April 23, with an average daily high temperature above 101°F. The hottest day of the year is March 10, with an average high of 105°F and low of 77°F.

The cool season lasts for 3.6 months, from June 23 to October 11, with an average daily high temperature below 89°F. The coldest day of the year is January 5, with an average low of 70°F and high of 100°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 LeerJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMcomfortablewarmwarmwarmhotswelteringswelteringcomfortablehot
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.

Somotillo, Nicaragua (7,881 miles away) and Água Branca, Brazil (5,114 miles) are the far-away foreign places with temperatures most similar to Leer (view comparison).

Clouds

In Leer, 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 Leer begins around September 7 and lasts for 6.2 months, ending around March 13. On December 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 49% of the time, and overcast or mostly cloudy 51% of the time.

The cloudier part of the year begins around March 13 and lasts for 5.8 months, ending around September 7. On August 2, the cloudiest day of the year, the sky is overcast or mostly cloudy 75% of the time, and clear, mostly clear, or partly cloudy 25% of the time.

Cloud Cover Categories

Cloud Cover Categories in LeerclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Dec 2349%Dec 2349%Aug 225%Aug 225%Sep 737%Sep 737%Mar 1337%Mar 1337%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 Leer varies very significantly throughout the year.

The wetter season lasts 5.7 months, from May 1 to October 22, with a greater than 34% chance of a given day being a wet day. The chance of a wet day peaks at 69% on August 20.

The drier season lasts 6.3 months, from October 22 to May 1. The smallest chance of a wet day is 0% on January 13.

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 August 20.

Daily Chance of Precipitation

Daily Chance of Precipitation in LeerwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Aug 2069%Aug 2069%Jan 130%Jan 130%Jan 11%Jan 11%May 134%May 134%Oct 2234%Oct 2234%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. Leer experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.4 months, from April 1 to November 13, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around August 10, with an average total accumulation of 5.9 inches.

The rainless period of the year lasts for 4.6 months, from November 13 to April 1. The least rain falls around January 19, with an average total accumulation of 0.0 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 Leer does not vary substantially over the course of the year, staying within 36 minutes of 12 hours throughout. In 2017, the shortest day is December 21, with 11 hours, 39 minutes of daylight; the longest day is June 21, with 12 hours, 37 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 May 27, and the latest sunrise is 40 minutes later at 7:19 AM on January 30. The earliest sunset is at 6:36 PM on November 14, and the latest sunset is 46 minutes later at 7:22 PM on July 13.

Daylight saving time (DST) is not observed in Leer during 2017.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in LeerJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMMay 276:39 AMMay 276:39 AM7:22 PMJul 137:22 PMJul 13Nov 146:36 PMNov 146:36 PM7:19 AMJan 307:19 AMJan 30daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2017. 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.

Leer experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 7.5 months, from April 9 to November 25, during which time the comfort level is muggy, oppressive, or miserable at least 25% of the time. The muggiest day of the year is September 1, with muggy conditions 99% of the time.

The least muggy day of the year is January 28, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

Humidity Comfort Levels in LeermuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jan 280%Jan 280%99%Sep 199%Sep 1Apr 925%Apr 925%Nov 2525%Nov 2525%oppressiveoppressivemuggymuggydrydryhumidhumid
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 Leer experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.1 months, from November 26 to April 28, with average wind speeds of more than 7.2 miles per hour. The windiest day of the year is February 1, with an average hourly wind speed of 10.4 miles per hour.

The calmer time of year lasts for 6.9 months, from April 28 to November 26. The calmest day of the year is September 25, with an average hourly wind speed of 3.9 miles per hour.

Average Wind Speed

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 Leer varies throughout the year.

The wind is most often from the east for 1.1 months, from March 2 to April 6 and for 2.4 months, from October 5 to December 16, with a peak percentage of 59% on November 26. The wind is most often from the south for 3.3 months, from April 6 to July 16 and for 1.7 weeks, from September 23 to October 5, with a peak percentage of 73% on May 30. The wind is most often from the north for 2.5 months, from December 16 to March 2, with a peak percentage of 63% on January 1.

Wind Direction

Wind Direction in LeerNESWSENJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westsouthnortheast
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 Leer 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 time of year to visit Leer for general outdoor tourist activities is from mid November to early February, with a peak score in the last week of December.

Tourism Score

Tourism Score in Leerbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468104.74.72.52.53.73.7 precipitationprecipitationcloudscloudstemperaturetemperaturetourism 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 Leer for hot-weather activities is from late October to mid February, with a peak score in the last week of December.

Beach/Pool Score

Beach/Pool Score in Leerbest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.66.64.14.15.45.4 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/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 Leer 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 LeerJanFebMarAprMayJunJulAugSepOctNovDec0%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 3comfortablewarmhotsweltering
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

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 2.6 months, from January 25 to April 13, with an average daily incident shortwave energy per square meter above 6.1 kWh. The brightest day of the year is February 20, with an average of 6.5 kWh.

The darker period of the year lasts for 2.2 months, from June 20 to August 26, with an average daily incident shortwave energy per square meter below 5.0 kWh. The darkest day of the year is July 26, with an average of 4.7 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in LeerbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWhFeb 206.5 kWhFeb 206.5 kWhJul 264.7 kWhJul 264.7 kWhApr 136.1 kWhApr 136.1 kWhJun 205.0 kWhJun 205.0 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 Leer are 8.303 deg latitude, 30.141 deg longitude, and 1,299 ft elevation.

The topography within 2 miles of Leer is essentially flat, with a maximum elevation change of 43 feet and an average elevation above sea level of 1,299 feet. Within 10 miles is also essentially flat (56 feet). Within 50 miles is essentially flat (135 feet).

The area within 2 miles of Leer is covered by cropland (41%), grassland (37%), and shrubs (21%), within 10 miles by shrubs (41%) and grassland (29%), and within 50 miles by shrubs (43%) and grassland (29%).

Data Sources

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

Leer 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 Leer, 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.