Recent ensemble forecasts from major models, including GFS and ECMWF, converge on a daily maximum near 26–28°C for Istanbul on July 5, 2026, driven by persistent high pressure, light northerly flow off the Black Sea, and mostly clear skies that moderate daytime heating. These conditions match typical early-July climatology, where average highs reach 27–28°C with low precipitation risk and limited warm advection. Slight model spread around this range, plus minor uncertainties in boundary-layer mixing and cloud cover, supports the market-implied concentration on 26°C (40.5%) and adjacent outcomes at 25–27°C. Updated runs over the next 48 hours, along with any shifts in regional pressure gradients, remain the key near-term catalysts that could adjust these probabilities.
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 July 5?
26°C 57%
27°C 26%
25°C 13%
28°C 4%
23°C or below
<1%
24°C
3%
25°C
13%
26°C
57%
27°C
26%
28°C
4%
29°C
1%
30°C
1%
31°C
<1%
32°C
<1%
33°C or higher
<1%
26°C 57%
27°C 26%
25°C 13%
28°C 4%
23°C or below
<1%
24°C
3%
25°C
13%
26°C
57%
27°C
26%
28°C
4%
29°C
1%
30°C
1%
31°C
<1%
32°C
<1%
33°C or higher
<1%
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Market Opened: Jul 3, 2026, 12:03 AM ET
Resolver
0x69c47De9D...The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Resolver
0x69c47De9D...Recent ensemble forecasts from major models, including GFS and ECMWF, converge on a daily maximum near 26–28°C for Istanbul on July 5, 2026, driven by persistent high pressure, light northerly flow off the Black Sea, and mostly clear skies that moderate daytime heating. These conditions match typical early-July climatology, where average highs reach 27–28°C with low precipitation risk and limited warm advection. Slight model spread around this range, plus minor uncertainties in boundary-layer mixing and cloud cover, supports the market-implied concentration on 26°C (40.5%) and adjacent outcomes at 25–27°C. Updated runs over the next 48 hours, along with any shifts in regional pressure gradients, remain the key near-term catalysts that could adjust these probabilities.
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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