Climate of Islamabad
The climate of Islamabad is a humid subtropical climate (Köppen climate classification) with four seasons: a pleasant Spring (March–April), a hot Summer (May–August), a warm dry Autumn (September—October), and a cold Winter (November—February). The hottest month is June, where average highs routinely exceed 37 °C (98.6 °F). The wettest month is July, with heavy rainfall and evening thunderstorms with the possibility of cloudburst. The coldest month is January, with temperatures variable by location. In Islamabad, temperatures vary from cold to mild, routinely dropping below 4c . In the hills there is sparse snowfall. The weather ranges from a minimum of −4.9 °C (23.2 °F) in January to a maximum of 46.1 °C (115.0 °F) in June. The average low is 6 °C (42.8 °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 −4.9 °C (23.2 °F) in January. On 23 July 2001, Islamabad received a record breaking 620 millimetres (24 in) of rainfall in just 10 hours. It was the heaviest rainfall in Pakistan during the past 100 years.
| Islamabad, Pakistan | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Climate chart (explanation) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Climate data for Islamabad (1991-2020) | |||||||||||||
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| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 30.1 (86.2) |
30.0 (86.0) |
37.0 (98.6) |
44.0 (111.2) |
45.6 (114.1) |
46.6 (115.9) |
45.0 (113.0) |
42.0 (107.6) |
38.1 (100.6) |
38.0 (100.4) |
32.2 (90.0) |
28.3 (82.9) |
46.6 (115.9) |
| Mean daily maximum °C (°F) | 17.7 (63.9) |
20.0 (68.0) |
24.8 (76.6) |
30.6 (87.1) |
36.1 (97.0) |
38.3 (100.9) |
35.4 (95.7) |
33.9 (93.0) |
33.4 (92.1) |
30.9 (87.6) |
25.4 (77.7) |
20.4 (68.7) |
28.9 (84.0) |
| Daily mean °C (°F) | 10.7 (51.3) |
13.4 (56.1) |
18.1 (64.6) |
23.6 (74.5) |
28.7 (83.7) |
31.4 (88.5) |
30.1 (86.2) |
29.1 (84.4) |
27.6 (81.7) |
23.3 (73.9) |
17.3 (63.1) |
12.5 (54.5) |
22.2 (72.0) |
| Mean daily minimum °C (°F) | 3.6 (38.5) |
6.8 (44.2) |
11.4 (52.5) |
16.6 (61.9) |
21.5 (70.7) |
24.5 (76.1) |
24.9 (76.8) |
24.2 (75.6) |
21.7 (71.1) |
15.6 (60.1) |
9.1 (48.4) |
4.7 (40.5) |
15.4 (59.7) |
| Record low °C (°F) | −6 (21) |
−5.0 (23.0) |
−3.8 (25.2) |
2.1 (35.8) |
5.5 (41.9) |
13.0 (55.4) |
15.2 (59.4) |
14.5 (58.1) |
13.3 (55.9) |
5.7 (42.3) |
−0.6 (30.9) |
−2.8 (27.0) |
−6.0 (21.2) |
| Average precipitation mm (inches) | 55.2 (2.17) |
93.4 (3.68) |
95.2 (3.75) |
58.1 (2.29) |
39.9 (1.57) |
78.4 (3.09) |
310.6 (12.23) |
317.0 (12.48) |
135.4 (5.33) |
34.4 (1.35) |
17.7 (0.70) |
25.9 (1.02) |
1,261.2 (49.65) |
| Average precipitation days (≥ 1.0 mm) | 4.7 | 6.3 | 7.3 | 6.1 | 5.2 | 6.0 | 12.3 | 11.9 | 6.4 | 2.9 | 2.0 | 2.0 | 73.1 |
| Average relative humidity (%) | 67 | 63 | 62 | 52 | 42 | 44 | 68 | 76 | 67 | 62 | 63 | 66 | 61 |
| Mean monthly sunshine hours | 195.7 | 187.1 | 202.3 | 252.4 | 319.0 | 300.1 | 264.4 | 250.7 | 262.2 | 275.5 | 247.9 | 195.6 | 2,952.9 |
| Mean daily sunshine hours | 6.3 | 6.6 | 6.5 | 8.4 | 10.1 | 10.0 | 8.5 | 8.1 | 8.7 | 8.9 | 8.3 | 6.3 | 8.1 |
| Source 1: NOAA (sun, 1961-1990), Deutscher Wetterdienst (humidity 1973-1990, daily sun 1961-1990) | |||||||||||||
| Source 2: PMD (extremes) | |||||||||||||