São Tomé features a tropical wet and dry climate (Köppen ''As''), although it is not far above a semi-arid climate (''BSh'') due to the influence of the cold Benguela Current, which makes even the wettest months drier than would be expected for such a low latitude but at the same time makes the city very cloudy and foggy even during the almost rainless dry season mid-year. The city has a relatively lengthy wet season from October through May and a short dry season. São Tomé sees on average just under  of rainfall per year. Temperatures in the city are relatively constant, with average high temperatures usually around  and average low temperatures around .