Freetown Lagos Niamey

Annual rainfall (inches) 138 71 22

Rainfall in wettest month (inches) 37 17 7

Length of wet season (months with more than 7 6 2

four inches)

Mean annual temperature* 81 (27) 79 (26) 84 (29)

Mean daily temperature* in coolest month 77 (25) 75 (24) 75 (24)

Mean diurnal temperature range* in coolest month 9 (5) 13 (7) 38 (21)

Mean daily temperature* in hottest month 82 (28) 82 (28) 93 (34)

Mean diurnal temperature range* in hottest month 9 (5) 18 (10) 34 (19)

*degrees Fahrenheit (degrees Celsius)