Typical race-morning air at Istanbul Half Marathon averages 13°C across the last 10 years (about 9°C to 17°C in that window). The morning can still warm as you run. The stickiest morning in that set was 2018, WBGT around 14°C. 2019 was the windiest, around 21 km/h. Use that range for planning, not as a promise for race day.
Half
Istanbul Half Marathon
Upcoming, awaiting next editionIstanbul, Turkey
Goal time
1:35:00
Adjusted time (preview)
About 67 m of climbing and 71 m of descent. Mostly flat.
Almost all within 2%No grades over 6%Two climbs
Impacts
Based on the historical mean for the race window over the last 10 years, ±5 days.
Elevation
Heat
Wind
Total Impact
Race Pass: personalised finish time, adjusted splits, and your race-day pacing plan.
Race morning history
Last 10 years, around the 09:15 start hour. Typical mid-April air averages 13°C (about 9°C to 17°C in that window). The bands are that history, not a forecast range. Hover or drag to explore.
Race-morning temperature
Most mornings
11-15°C
Almost all
9-17°C
Humidity
78%
Dew
9°C
WBGT
12°C
13°CAverage
09:15-10:50
Almost all (90%)Most mornings (70%)AverageRain
Year pills: green is favorable heat. Amber is moderate. Red is challenging.
Blue is most mornings. Dashed lines are the rare tails. Pink is the average. The bands are historical race mornings, not a forecast range. Blue columns are rain on the right scale. This assumes a 1:35. You can set your own time in the app.
Typical race-morning wind
Where the wind usually came from on race morning, not where it was going.
N
Most frequent (20%)
Wind speed
0-6 km/h
6-13 km/h
13-21 km/h
21+ km/h
Year pills: green is favorable wind. Amber is moderate. Red is challenging. Colours assume no drafting.
A start that feels cool is not a promise about the second half.
Related races
Same city, region or country, when we can resolve them. World majors also point to each other.
View race map for this area.
Pacing and conditions FAQ
Beyond conditions
Conditions are only part of the race-day loss
Pacing mistakes often add several minutes, sometimes more than conditions alone, especially when the course and conditions are not ideal.
What your plan includes
Everything you need to turn this race preview into a usable race-day plan.
Personalized pacing
Effort and pace guidance tuned to this course profile.
Weather-adjusted splits
Split targets that account for heat, wind, and elevation.
Heat adaptation & drafting
Adjust for your heat tolerance and drafting preferences.
Get your personalised race plan for Istanbul Half Marathon.
Pacing, splits, and race-day strategy personalised to your fitness and this course.
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