Islamabad has a humid subtropical climate (Köppen: Cwa), with five seasons: Winter (November–February), Spring (March and April), Summer (May and June), Rainy Monsoon (July and August) and Autumn (September and October). The hottest month is June, where average highs routinely exceed . The wettest month is July, with heavy rainfalls and evening thunderstorms with the possibility of cloudburst and flooding. The coolest month is January.