Summer Weather in Loum Cameroon

Daily high temperatures decrease by 5°F, from 85°F to 81°F, rarely falling below 76°F or exceeding 89°F. The lowest daily average high temperature is 80°F on August 6.

Daily low temperatures are around 71°F, rarely falling below 69°F or exceeding 74°F. The lowest daily average low temperature is 71°F on August 1.

For reference, on February 18, the hottest day of the year, temperatures in Loum typically range from 72°F to 90°F, while on January 1, the coldest day of the year, they range from 70°F to 88°F.

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.

Villavicencio, Colombia (5,745 miles away); Valencia, Venezuela (5,335 miles); and Ungaran, Indonesia (6,996 miles) are the far-away foreign places with temperatures most similar to Loum (view comparison).

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The summer in Loum experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 82% throughout the season. The lowest chance of overcast or mostly cloudy conditions is 81% on June 20.

The clearest day of the summer is June 20, with clear, mostly clear, or partly cloudy conditions 19% of the time.

For reference, on April 22, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 91%, while on December 29, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 37%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Loum, the chance of a wet day over the course of the summer is rapidly increasing, starting the season at 81% and ending it at 88%.

For reference, the year's highest daily chance of a wet day is 92% on October 7, and its lowest chance is 7% on January 2.

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 in Loum is very rapidly increasing, starting the season at 11.7 inches, when it rarely exceeds 22.9 inches or falls below 4.5 inches, and ending the season at 18.7 inches, when it rarely exceeds 31.3 inches or falls below 8.6 inches.

The highest average 31-day accumulation is 19.2 inches on August 15.

Over the course of the summer in Loum, the length of the day is essentially constant. The shortest day of the summer is August 31, with 12 hours, 12 minutes of daylight and the longest day is June 18, with 12 hours, 24 minutes of daylight.

The earliest sunrise of the summer in Loum is 6:07 AM on June 1 and the latest sunrise is 10 minutes later at 6:17 AM on August 6.

The latest sunset is 6:38 PM on July 18 and the earliest sunset is 11 minutes earlier at 6:27 PM on August 31.

Daylight saving time is not observed in Loum during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 6:10 AM and sets 12 hours, 24 minutes later, at 6:34 PM, while on December 21, the shortest day of the year, it rises at 6:23 AM and sets 11 hours, 51 minutes later, at 6:14 PM.

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.

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.

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 in Loum is essentially constant during the summer, remaining around 100% throughout.

For reference, on April 10, the muggiest day of the year, there are muggy conditions 100% of the time, while on February 10, the least muggy day of the year, there are muggy conditions 94% of the time.

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 Loum is increasing during the summer, increasing from 3.6 miles per hour to 4.6 miles per hour over the course of the season.

For reference, on August 3, the windiest day of the year, the daily average wind speed is 4.9 miles per hour, while on November 22, the calmest day of the year, the daily average wind speed is 2.7 miles per hour.

The highest daily average wind speed during the summer is 4.9 miles per hour on August 3.

The hourly average wind direction in Loum throughout the summer is predominantly from the west, with a peak proportion of 76% on August 6.

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 Loum 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.

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 in Loum are very rapidly increasing during the summer, increasing by 2,322°F, from 4,324°F to 6,646°F, over the course of the season.

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 in Loum is essentially constant during the summer, remaining within 0.1 kWh of 4.0 kWh throughout.

The highest average daily incident shortwave solar energy during the summer is 4.1 kWh on August 14.

For the purposes of this report, the geographical coordinates of Loum are 4.718 deg latitude, 9.735 deg longitude, and 771 ft elevation.

The topography within 2 miles of Loum contains very significant variations in elevation, with a maximum elevation change of 820 feet and an average elevation above sea level of 888 feet. Within 10 miles contains very significant variations in elevation (6,640 feet). Within 50 miles also contains extreme variations in elevation (10,525 feet).

The area within 2 miles of Loum is covered by cropland (37%), trees (32%), grassland (19%), and shrubs (11%), within 10 miles by trees (52%) and cropland (25%), and within 50 miles by trees (69%) and cropland (15%).