Koundara has a
tropical savanna climate (
Köppen climate classification Aw), with the temperature being hot year round, and with a wet and dry season. On 29 March 2017, Koundara recorded a temperature of , which is the highest temperature to have ever been recorded in Guinea. {{Weather box | width = auto | collapsed = yes | metric first = yes | single line = yes | location = Koundara (1991–2020) | Jan high C = 35.3 | Feb high C = 37.9 | Mar high C = 39.8 | Apr high C = 40.7 | May high C = 39.3 | Jun high C = 35.0 | Jul high C = 32.1 | Aug high C = 31.3 | Sep high C = 32.0 | Oct high C = 33.4 | Nov high C = 34.4 | Dec high C = 34.5 | year high C = 35.5 | Jan mean C = 25.2 | Feb mean C = 27.9 | Mar mean C = 30.5 | Apr mean C = 32.0 | May mean C = 31.7 | Jun mean C = 28.9 | Jul mean C = 27.0 | Aug mean C = 26.5 | Sep mean C = 26.7 | Oct mean C = 27.5 | Nov mean C = 26.7 | Dec mean C = 24.6 | year mean C = 27.9 | Jan low C = 15.0 | Feb low C = 18.0 | Mar low C = 21.2 | Apr low C = 23.4 | May low C = 24.0 | Jun low C = 22.9 | Jul low C = 21.9 | Aug low C = 21.6 | Sep low C = 21.4 | Oct low C = 21.7 | Nov low C = 19.1 | Dec low C = 14.4 | year low C = 20.4 | precipitation colour = green | Jan precipitation mm = 0.1 | Feb precipitation mm = 0.0 | Mar precipitation mm = 0.5 | Apr precipitation mm = 0.7 | May precipitation mm = 34.1 | Jun precipitation mm = 142.1 | Jul precipitation mm = 229.4 | Aug precipitation mm = 333.1 | Sep precipitation mm = 293.4 | Oct precipitation mm = 89.9 | Nov precipitation mm = 6.2 | Dec precipitation mm = 0.2 | year precipitation mm = 1129.7 | unit precipitation days = 1.0 mm | Jan precipitation days = 0.0 | Feb precipitation days = 0.0 | Mar precipitation days = 0.0 | Apr precipitation days = 0.1 | May precipitation days = 3.2 | Jun precipitation days = 9.9 | Jul precipitation days = 14.2 | Aug precipitation days = 18.7 | Sep precipitation days = 17.7 | Oct precipitation days = 7.1 | Nov precipitation days = 0.5 | Dec precipitation days = 0.1 | year precipitation days = 71.5 | source =
NOAA ==References==