Fall Weather in Lambaréné Gabon

Daily high temperatures decrease by 5°F, from 90°F to 85°F, rarely falling below 81°F or exceeding 93°F. The highest daily average high temperature is 90°F on March 16.

Daily low temperatures are around 74°F, rarely falling below 71°F or exceeding 77°F. The highest daily average low temperature is 75°F on April 21.

For reference, on March 16, the hottest day of the year, temperatures in Lambaréné typically range from 74°F to 90°F, while on July 19, the coldest day of the year, they range from 70°F to 81°F.

The figure below shows you a compact characterization of the hourly average fall 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.

Maceió, Alagoas, Brazil (3,223 miles away) is the far-away foreign place with temperatures most similar to Lambaréné (view comparison).

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The fall in Lambaréné experiences rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 83% to 71%. The highest chance of overcast or mostly cloudy conditions is 86% on April 27.

The clearest day of the fall is May 31, with clear, mostly clear, or partly cloudy conditions 29% of the time.

For reference, on April 24, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 86%, while on July 24, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 47%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Lambaréné, the chance of a wet day over the course of the fall is very rapidly decreasing, starting the season at 71% and ending it at 41%.

For reference, the year's highest daily chance of a wet day is 90% on November 11, and its lowest chance is 2% on July 30.

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 fall in Lambaréné is very rapidly decreasing, starting the season at 8.0 inches, when it rarely exceeds 12.9 inches or falls below 3.7 inches, and ending the season at 4.3 inches, when it rarely exceeds 9.5 inches or falls below 0.9 inches.

The highest average 31-day accumulation is 10.2 inches on April 3.

Over the course of the fall in Lambaréné, the length of the day is essentially constant. The shortest day of the fall is May 31, with 12 hours, 5 minutes of daylight and the longest day is March 1, with 12 hours, 7 minutes of daylight.

The latest sunrise of the fall in Lambaréné is 6:27 AM on March 1 and the earliest sunrise is 15 minutes earlier at 6:12 AM on May 14.

The latest sunset is 6:35 PM on March 1 and the earliest sunset is 17 minutes earlier at 6:17 PM on May 15.

Daylight saving time is not observed in Lambaréné during 2026.

For reference, on December 21, the longest day of the year, the Sun rises at 6:12 AM and sets 12 hours, 10 minutes later, at 6:22 PM, while on June 21, the shortest day of the year, it rises at 6:18 AM and sets 12 hours, 5 minutes later, at 6:23 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 fall of 2026. 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 Lambaréné is essentially constant during the fall, remaining around 100% throughout.

For reference, on February 6, the muggiest day of the year, there are muggy conditions 100% of the time, while on July 30, the least muggy day of the year, there are muggy conditions 99% 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 Lambaréné is essentially constant during the fall, remaining within 0.2 miles per hour of 2.1 miles per hour throughout.

For reference, on August 8, the windiest day of the year, the daily average wind speed is 2.9 miles per hour, while on May 7, the calmest day of the year, the daily average wind speed is 1.9 miles per hour.

The lowest daily average wind speed during the fall is 1.9 miles per hour on May 7.

The wind direction in Lambaréné during the fall is predominantly out of the west from March 1 to April 9 and from April 17 to May 31 and the south from April 9 to April 17.

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 Lambaréné 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 Lambaréné are very rapidly increasing during the fall, increasing by 2,718°F, from 6,887°F to 9,605°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 Lambaréné is essentially constant during the fall, remaining within 0.2 kWh of 4.2 kWh throughout.

The lowest average daily incident shortwave solar energy during the fall is 4.0 kWh on May 7.

For the purposes of this report, the geographical coordinates of Lambaréné are -0.700 deg latitude, 10.241 deg longitude, and 85 ft elevation.

The topography within 2 miles of Lambaréné contains only modest variations in elevation, with a maximum elevation change of 246 feet and an average elevation above sea level of 89 feet. Within 10 miles contains only modest variations in elevation (1,112 feet). Within 50 miles contains very significant variations in elevation (2,976 feet).

The area within 2 miles of Lambaréné is covered by water (33%), cropland (24%), grassland (16%), and trees (14%), within 10 miles by trees (45%) and grassland (18%), and within 50 miles by trees (72%).