Istanbul weather records
Record high and low temperatures for Istanbul, by month, by season, and all-time, with the dates they occurred, across 1980–2026 of daily climate history. Its hottest day on record reached 34°C on 2025-07-23; its coldest fell to -5°C on 1985-02-19.
Records by month
The warmest (▲) and coldest (▼) both the daytime high and the overnight low have ever been in each calendar month, so each column shows its record high and its record low. Tap a month for its full averages and typical range.
| Month | Daytime high | Overnight low |
|---|---|---|
| January | 19°C2010-01-01
-1°C2017-01-08
|
14°C2026-01-04
-3°C2017-01-07
|
| February | 18°C2015-02-01
-3°C1985-02-20
|
14°C2021-02-09
-5°C1985-02-19
|
| March | 21°C1993-03-27
-2°C1987-03-06
|
15°C2001-03-26
-4°C1987-03-06
|
| April | 24°C2015-04-28
5°C2003-04-08
|
17°C2024-04-17
3°C2004-04-05
|
| May | 29°C2013-05-23
10°C1990-05-03
|
21°C2013-05-23
7°C1995-05-05
|
| June | 33°C2006-06-02
14°C1990-06-01
|
25°C2007-06-27
11°C1990-06-03
|
| July | 34°C2025-07-23
19°C1993-07-14
|
26°C2002-07-17
15°C1985-07-05
|
| August | 34°C2021-08-05
20°C1999-08-27
|
26°C2010-08-15
16°C1981-08-29
|
| September | 32°C2017-09-20
16°C2022-09-22
|
24°C2024-09-14
13°C1997-09-27
|
| October | 30°C1984-10-07
8°C1987-10-30
|
22°C2020-10-07
6°C2011-10-18
|
| November | 26°C2023-11-04
3°C1989-11-30
|
18°C2019-11-05
1°C1995-11-23
|
| December | 20°C2010-12-02
1°C2015-12-31
|
17°C2010-12-02
-1°C1992-12-30
|
Records by season
The warmest (▲) and coldest (▼) both the daytime high and the overnight low have reached in each meteorological season (Northern Hemisphere, each a three-month span).
| Season | Daytime high | Overnight low |
|---|---|---|
| Winter (Dec–Feb) | 20°C2010-12-02
-3°C1985-02-20
|
17°C2010-12-02
-5°C1985-02-19
|
| Spring (Mar–May) | 29°C2013-05-23
-2°C1987-03-06
|
21°C2013-05-23
-4°C1987-03-06
|
| Summer (Jun–Aug) | 34°C2025-07-23
14°C1990-06-01
|
26°C2010-08-15
11°C1990-06-03
|
| Autumn (Sep–Nov) | 32°C2017-09-20
3°C1989-11-30
|
24°C2024-09-14
1°C1995-11-23
|
All-time records
The most extreme value Istanbul has recorded for each metric across its entire history.
High
Low
Feels-like
Humidity
Wind
Gust
Precip
For rainfall, the “driest” figure is the longest run of consecutive days without measurable rain, dated to when that dry spell began.