Colors of the following climate diagrams: Senegal Guinea
Daily maximum temperatures
The highest daytime temperatures in Guinea are reached in March with an average of 34.1 °C. The coldest month, on the other hand, is August, with an average of just 27.5 °C. In Senegal, April is the warmest month, with 38.0 °C. There, it is coolest in August with an average of 32.9 °C.
Night time lows
At night, it cools down to varying degrees depending on the country and altitude. In Guinea, temperatures drop as low as 16.7 °C in January. The warmest nights are in May at 22.1 °C. In Senegal, it is coolest at night in January at 17.5 °C and warmest in July at 24.7 °C. This corresponds to a cooling of 6.7 to 15.6 °C in Guinea and 8.5 to 16.6 °C in Senegal.
The humidity of the air depends to a large extent on the air temperature. The warmer the air, the more water it can absorb. At a temperature of 25°C it is 23 grams per cubic meter, at 30 degrees it is already 26 grams. Therefore, the air humidity is given as a relative value to the temperature-dependent maximum amount. It becomes unpleasant when high humidity is combined with high temperatures.
Humidex is an approximate, sensed temperature calculated on the basis of air temperature, dew point and humidity. It was developed in 1965 by the Canadian meteorologists J. M. Masterton and F. A. Richardson. Since the wind speed is ignored here, it is not very meaningful in areas below approx. 15°C. Above that, it is more reliable, since at higher temperatures humidity plays a greater role than wind.
Rain days per month
By definition, a rain day is a day on which at least 0.1 liters of precipitation per m² fall. This corresponds to a 1 square meter puddle in which the water stands 0.1 mm high — insofar as the water does not seep away or evaporate. So it does not have to rain all day long. August brings the most rainy days (23.6) in Guinea. With an average of only 0.4 days, January is the friendliest. In Senegal, it rains most often in August with 15.5 days.
Precipitation amount per day
Depending on the season and the location of a country, the wind brings a varying amount of water with it. As a rule, the water evaporating in the oceans is absorbed and then transported inland. The greatest amount of rain (hail or dew are also forms of precipitation) in Guinea occurs in August, when about 31.0 liters per square meter fall per day. In Senegal, the average amount of precipitation ranges from zero liters per day in December to 8.5 in August. However, these are average values. If you consider that there are only 23.6 rainy days in Guinea in August, each of them accounts for about 39.4 liters.
Sunshine hours per day
With 2,811 hours of sunshine per year, Senegal is in the lead. The most hours of sunshine (9.2 per day) are in April. Guinea falls into second place with only 2,409 hours. There the sun is visible in August for only 3.5 hours per day, so not hidden behind clouds.
Hours of daylight
The length of a day varies throughout the year and depends on the distance from the equator. In January, the day in Guinea is only 11.6 hours long. In June, on the other hand, it is 12.7 hours. In Senegal, it is 11.3 hours in December and 13.0 in June.