Latest ECMWF and GFS model runs show consensus for Istanbul's highest temperature on April 17 clustering at 13–14°C, driving trader sentiment with near-even implied probabilities between these outcomes amid persistent northerly airflow channeling cool air over the Marmara Sea. The Turkish State Meteorological Service (MGM) aligns with this, forecasting overcast conditions suppressing daytime heating below the April climatological average of 16°C, a trend solidified by observations over the past week of sustained below-normal highs around 11–12°C. Differentiating 13°C from 14°C hinges on ensemble spread: ECMWF emphasizes thicker cloud decks limiting insolation, while GFS hints at partial afternoon clearing and better boundary layer mixing. New MGM hourly updates and 00z model cycles today could refine this uncertainty before official airport measurements resolve the market.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Istanbul on April 17?
Highest temperature in Istanbul on April 17?
13°C 33%
14°C 30%
12°C 14%
10°C 12%
8°C or below
2%
9°C
3%
10°C
12%
11°C
12%
12°C
14%
13°C
33%
14°C
30%
15°C
8%
16°C
6%
17°C
2%
18°C or higher
5%
13°C 33%
14°C 30%
12°C 14%
10°C 12%
8°C or below
2%
9°C
3%
10°C
12%
11°C
12%
12°C
14%
13°C
33%
14°C
30%
15°C
8%
16°C
6%
17°C
2%
18°C or higher
5%
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column on the specified date once information is finalized for all hours on that date, available here: https://www.weather.gov/wrh/timeseries?site=LTFM
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve to "Yes" until data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: Apr 15, 2026, 12:22 AM ET
Resolver
0x69c47De9D...The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column on the specified date once information is finalized for all hours on that date, available here: https://www.weather.gov/wrh/timeseries?site=LTFM
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve to "Yes" until data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Resolver
0x69c47De9D...Latest ECMWF and GFS model runs show consensus for Istanbul's highest temperature on April 17 clustering at 13–14°C, driving trader sentiment with near-even implied probabilities between these outcomes amid persistent northerly airflow channeling cool air over the Marmara Sea. The Turkish State Meteorological Service (MGM) aligns with this, forecasting overcast conditions suppressing daytime heating below the April climatological average of 16°C, a trend solidified by observations over the past week of sustained below-normal highs around 11–12°C. Differentiating 13°C from 14°C hinges on ensemble spread: ECMWF emphasizes thicker cloud decks limiting insolation, while GFS hints at partial afternoon clearing and better boundary layer mixing. New MGM hourly updates and 00z model cycles today could refine this uncertainty before official airport measurements resolve the market.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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