<P> The climate of Islamabad has a humid subtropical climate (Köppen climate classifion, with five seasons: Winter (Nov − Feb), Spring (March − April), Summer (May − June), Rainy Monsoon (July − August) and Autumn (September − October). The hottest month is June, where average highs routinely exceed 38 ° C (100.4 ° F). The wettest month is July, with heavy rainfall and evening thunderstorms with the possibility of cloudburst . The coolest month is January, with temperatures variable by location . In Islamabad, temperatures vary from cold to mild, routinely dropping below zero . In the hills there is sparse snowfall . The weather ranges from a minimum of − 3.9 ° C (25.0 ° F) in January to a maximum of 46.1 ° C (115.0 ° F) in June . The average low is 2 ° C (35.6 ° F) in January, while the average high is 38.1 ° C (100.6 ° F) in June . The highest temperature recorded was 46.5 ° C (115.7 ° F) in June, while the lowest temperature was − 4 ° C (24.8 ° F) in January . On 23 July 2001, Islamabad received a record breaking 620 millimetres (24 in) of rain fell in just 10 hours . It was the heaviest rainfall in 24 hours in Islamabad and at any locality in Pakistan during the past 100 years . Following is the weather observed over Islamabad Airport, which is actually located in Rawalpindi . </P> <Table> <Tr> <Th_colspan="14"> (hide) Climate data for Islamabad (1961--1990) </Th> </Tr> <Tr> <Th> Month </Th> <Th> Jan </Th> <Th> Feb </Th> <Th> Mar </Th> <Th> Apr </Th> <Th> May </Th> <Th> Jun </Th> <Th> Jul </Th> <Th> Aug </Th> <Th> Sep </Th> <Th> Oct </Th> <Th> Nov </Th> <Th> Dec </Th> <Th> Year </Th> </Tr> <Tr> <Th> Record high ° C (° F) </Th> <Td> 30.1 (86.2) </Td> <Td> 30.0 (86) </Td> <Td> 34.4 (93.9) </Td> <Td> 40.6 (105.1) </Td> <Td> 45.6 (114.1) </Td> <Td> 46.6 (115.9) </Td> <Td> 45.0 (113) </Td> <Td> 42.0 (107.6) </Td> <Td> 38.1 (100.6) </Td> <Td> 37.8 (100) </Td> <Td> 32.2 (90) </Td> <Td> 28.3 (82.9) </Td> <Td> 46.6 (115.9) </Td> </Tr> <Tr> <Th> Average high ° C (° F) </Th> <Td> 17.7 (63.9) </Td> <Td> 19.1 (66.4) </Td> <Td> 23.9 (75) </Td> <Td> 30.1 (86.2) </Td> <Td> 35.3 (95.5) </Td> <Td> 38.7 (101.7) </Td> <Td> 35.0 (95) </Td> <Td> 33.4 (92.1) </Td> <Td> 33.5 (92.3) </Td> <Td> 30.9 (87.6) </Td> <Td> 25.4 (77.7) </Td> <Td> 19.7 (67.5) </Td> <Td> 28.6 (83.5) </Td> </Tr> <Tr> <Th> Daily mean ° C (° F) </Th> <Td> 10.1 (50.2) </Td> <Td> 12.1 (53.8) </Td> <Td> 16.9 (62.4) </Td> <Td> 22.6 (72.7) </Td> <Td> 27.5 (81.5) </Td> <Td> 31.2 (88.2) </Td> <Td> 29.7 (85.5) </Td> <Td> 28.5 (83.3) </Td> <Td> 27.0 (80.6) </Td> <Td> 22.4 (72.3) </Td> <Td> 16.5 (61.7) </Td> <Td> 11.6 (52.9) </Td> <Td> 21.3 (70.3) </Td> </Tr> <Tr> <Th> Average low ° C (° F) </Th> <Td> 2.6 (36.7) </Td> <Td> 5.1 (41.2) </Td> <Td> 9.9 (49.8) </Td> <Td> 15.0 (59) </Td> <Td> 19.7 (67.5) </Td> <Td> 23.7 (74.7) </Td> <Td> 24.3 (75.7) </Td> <Td> 23.5 (74.3) </Td> <Td> 20.6 (69.1) </Td> <Td> 13.9 (57) </Td> <Td> 7.5 (45.5) </Td> <Td> 3.4 (38.1) </Td> <Td> 14.1 (57.4) </Td> </Tr> <Tr> <Th> Record low ° C (° F) </Th> <Td> − 6.1 (21) </Td> <Td> − 2.2 (28) </Td> <Td> − 0.3 (31.5) </Td> <Td> 5.1 (41.2) </Td> <Td> 10.5 (50.9) </Td> <Td> 15.0 (59) </Td> <Td> 17.8 (64) </Td> <Td> 17.0 (62.6) </Td> <Td> 13.3 (55.9) </Td> <Td> 5.7 (42.3) </Td> <Td> − 0.6 (30.9) </Td> <Td> − 4.1 (24.6) </Td> <Td> − 6.1 (21) </Td> </Tr> <Tr> <Th> Average precipitation mm (inches) </Th> <Td> 56.1 (2.209) </Td> <Td> 73.5 (2.894) </Td> <Td> 89.8 (3.535) </Td> <Td> 61.8 (2.433) </Td> <Td> 39.2 (1.543) </Td> <Td> 62.2 (2.449) </Td> <Td> 267.0 (10.512) </Td> <Td> 309.9 (12.201) </Td> <Td> 98.2 (3.866) </Td> <Td> 29.3 (1.154) </Td> <Td> 17.8 (0.701) </Td> <Td> 37.3 (1.469) </Td> <Td> 1,142.1 (44.966) </Td> </Tr> <Tr> <Th> Mean monthly sunshine hours </Th> <Td> 195.7 </Td> <Td> 187.1 </Td> <Td> 202.3 </Td> <Td> 252.4 </Td> <Td> 311.9 </Td> <Td> 300.1 </Td> <Td> 264.4 </Td> <Td> 250.7 </Td> <Td> 262.2 </Td> <Td> 275.5 </Td> <Td> 247.9 </Td> <Td> 195.6 </Td> <Td> 2,945.8 </Td> </Tr> <Tr> <Td_colspan="14"> Source #1: NOAA (normals) </Td> </Tr> <Tr> <Td_colspan="14"> Source #2: PMD (extremes) </Td> </Tr> </Table>

When does islamabad get maximum amount of rainfall