Recent Changes of Some Observed Climate Extreme Events in Kano

Table 4

Summary of the daily temperature indices between the base (1961–1990) and recent (1991–2007) period.

Indices	Period		Difference	Unit
	1960–1990	1991–2007
Cool nights	1.86	2.42	0.55	%
Warm nights	1.79	2.42	0.62	%
Cool days	1.85	2.43	0.58	%
Warm days	1.57	2.37	0.80	%
Warm spell	0.81	5.14	4.33	%