Istanbul in July
In July, Istanbul has 26.2 mm (1.03 in) of rain, a daily high of 28.8 °C (83.8 °F) and a daily low of 20.7 °C (69.3 °F), as 1991-2020 model estimates; figures in brackets are converted. The daily high is a model estimate, adjusted against station records.
Last updated : back, with ERA5-Land model estimates.
Best time to visit Istanbul: July is a near miss for our rule: days are 0.8 °C over our 28 °C (model estimates). Expect 2.7 rain days (model estimate) and days that shorten by 42 min.
What July is like in Istanbul
- Jazz drifts out of the courtyards of landmark buildings every July. The Istanbul Jazz Festival also plays at old sites like Esma Sultan Mansion. Source: Istanbul Jazz Festival (İKSV), checked .
- Istanbulites head to Burgazada in summer. From the ferry, the blue and white walls of the Aya Yorgi Garibi Monastery fill the view. Source: Go Türkiye (Türkiye Tourism Promotion and Development Agency), checked .
- Small open-air concerts ring out on Heybeliada in summer, and a swimming club sits beside the sea. Source: Wikipedia, checked .
Key figures
Weather in July, 1991-2020 model estimates
- Daily high
- 28.8 °C (83.8 °F)
- Daily low
- 20.7 °C (69.3 °F)
- Rain
- 26.2 mm (1.03 in) in the month
- Sunshine
- no data
Model estimate 1991-2020, not a weather station: ERA5-Land model estimates (Copernicus), computed by City by Month for the grid cell nearest the city. Daily high and Days with rain: model estimate, adjusted against station records. Licence: CC BY 4.0. Checked . How we make and test model estimates
Model estimate for the ERA5-Land grid cell at 41.0° N, 29.0° E, 4 km from the city centre point.
How we define and convert these figures
Notes. Sunshine: Not in our ERA5-Land estimates.
Daylight on 15 July 2026
- Sunrise
- 05:45 local time
- Sunset
- 20:35 local time
- Day length
- 14 h 50 min
Day length 1-31 July: 15 h 05 min to 14 h 23 min, -42 min.
Source: NOAA Solar Calculator equations, checked .
Month by month
Each month: daily high in °C, then rain in mm, 1991-2020 model estimates.
ERA5-Land model estimates 1991-2020, as above, checked .
This month against the year
| Measure | July | Rank |
|---|---|---|
| Daily high | 28.8 °C | 2nd warmest |
| Daily low | 20.7 °C | 2nd warmest |
| Rain | 26.2 mm | 2nd driest |
| Sunshine | no data | no data |
| Day length | 14 h 50 min | 2nd longest |
Equal values share a rank. How we rank months
Istanbul in July, on average: 2.7 rain days (1 mm or more). Model estimate, adjusted against station records.
ERA5-Land model estimates 1991-2020, as above, checked .
Day length: NOAA solar equations, checked .
Public holidays this month
| Date | Holiday |
|---|---|
| Wednesday | Democracy and National Unity Day |
| Date | Holiday |
|---|---|
| Thursday | Democracy and National Unity Day |
Typed from the official lists for 2026 and 2027 and re-checked, .
English names are from the holidays library where the official list gives none. How we check holidays
Source: Official public holiday list (vakithesaplama.diyanet.gov.tr) for 2026 and 2027, checked ; holidays Python library, checked . Library: holidays 0.105.
Same month in 8 model-estimate cities
Istanbul is warmer than 4 of our 8 model-estimate cities in July by mean daily high. How we rank cities
Closest high and low in July: Lisbon (1.8 °C apart), Mumbai (2.6), Porto (2.7).
| City | Gap from Istanbul, °C | High, °C | Low, °C | Rain, mm | Sunshine, hours |
|---|---|---|---|---|---|
| Istanbul (this page) | — | 28.8 | 20.7 | 26.2 | no data |
| Lisbon (closest) | 1.8 | 27.5 | 18.4 | 3.8 | no data |
| Mumbai (closest) | 2.6 | 29.2 | 25.5 | no data | no data |
| Porto (closest) | 2.7 | 27.2 | 16.9 | 22.3 | no data |
| Bangkok | 4.7 | 33.0 | 25.8 | no data | no data |
| Delhi | 6.3 | 35.2 | 26.9 | no data | no data |
| Sydney | 11.2 | 17.7 | 9.4 | 52.8 | no data |
| Melbourne | 14.3 | 14.3 | 6.6 | 51.4 | no data |
Sources (1991-2020): ERA5-Land model estimates, checked . Each city's page names its grid cell. All sources in full on Methodology.
Sources
- Attribution: Copernicus Climate Change Service (2025): ERA5 Land hourly time-series data from 1950 to present. Copernicus Climate Change Service (C3S) Climate Data Store (CDS). DOI: 10.24381/ee82e357. Accessed on the check date shown. Generated using or contains modified Copernicus Climate Change Service information 2025. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains. Licence: CC BY 4.0. Checked .
- NOAA Solar Calculator equations, computed locally, NOAA Global Monitoring Laboratory (method); City by Month (computation). Attribution: Computed with the NOAA Solar Calculator method (no NOAA endorsement implied). Licence: Method, not data. Checked .
- holidays Python library, run locally. Attribution: holidays library, Vacanza team. Licence: MIT. Checked .
Official sources
Cite this page: City by Month. "Istanbul in July: weather, daylight, holidays". https://citybymonth.com/cities/turkey/istanbul/july/. Last updated 8 November 2026.