**Forecast consensus places Istanbul's overnight low for September 18 in the mid-to-upper teens Celsius, driving the near-even split between sub-14°C and 23°C+ buckets.** Multiple models, including GFS and regional runs, project daytime highs near 24–27°C under partly cloudy skies with light northeast winds, yielding minimums of 15–19°C depending on cloud cover and boundary-layer mixing. Radiative cooling rates overnight will hinge on whether skies clear enough for stronger heat loss or remain influenced by marine air from the Sea of Marmara. Ensemble spreads and recent model updates show modest variability around these values, leaving room for either cooler drainage or warmer advection to shift the exact minimum. Updated runs and official Turkish Meteorological Service guidance over the next 48 hours will refine the range before resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Istanbul on September 18?
Lowest temperature in Istanbul on September 18?
13°C or below 100%
23°C or higher 98%
14°C 40%
15°C 40%
NEW
NEW
Sep 18, 2026
13°C or below
100%
14°C
40%
15°C
40%
16°C
40%
17°C
40%
18°C
40%
19°C
40%
20°C
40%
21°C
40%
22°C
40%
23°C or higher
98%
13°C or below 100%
23°C or higher 98%
14°C 40%
15°C 40%
NEW
NEW
Sep 18, 2026
13°C or below
$0 Vol.
100%
14°C
$0 Vol.
40%
15°C
$0 Vol.
40%
16°C
$0 Vol.
40%
17°C
$0 Vol.
40%
18°C
$0 Vol.
40%
19°C
$0 Vol.
40%
20°C
$0 Vol.
40%
21°C
$0 Vol.
40%
22°C
$0 Vol.
40%
23°C or higher
$0 Vol.
98%
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Istanbul Airport in degrees Celsius on 18 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=LTFM
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.**Forecast consensus places Istanbul's overnight low for September 18 in the mid-to-upper teens Celsius, driving the near-even split between sub-14°C and 23°C+ buckets.** Multiple models, including GFS and regional runs, project daytime highs near 24–27°C under partly cloudy skies with light northeast winds, yielding minimums of 15–19°C depending on cloud cover and boundary-layer mixing. Radiative cooling rates overnight will hinge on whether skies clear enough for stronger heat loss or remain influenced by marine air from the Sea of Marmara. Ensemble spreads and recent model updates show modest variability around these values, leaving room for either cooler drainage or warmer advection to shift the exact minimum. Updated runs and official Turkish Meteorological Service guidance over the next 48 hours will refine the range before resolution.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Istanbul Airport in degrees Celsius on 18 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=LTFM
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=LTFM
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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: Sep 16, 2026, 12:31 AM ET
Volume
$0End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 12:31 AM ETResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Istanbul Airport in degrees Celsius on 18 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=LTFM
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.**Forecast consensus places Istanbul's overnight low for September 18 in the mid-to-upper teens Celsius, driving the near-even split between sub-14°C and 23°C+ buckets.** Multiple models, including GFS and regional runs, project daytime highs near 24–27°C under partly cloudy skies with light northeast winds, yielding minimums of 15–19°C depending on cloud cover and boundary-layer mixing. Radiative cooling rates overnight will hinge on whether skies clear enough for stronger heat loss or remain influenced by marine air from the Sea of Marmara. Ensemble spreads and recent model updates show modest variability around these values, leaving room for either cooler drainage or warmer advection to shift the exact minimum. Updated runs and official Turkish Meteorological Service guidance over the next 48 hours will refine the range before resolution.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Istanbul Airport in degrees Celsius on 18 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=LTFM
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=LTFM
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.
Volume
$0End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 12:31 AM ETResolver
0x69c47De9D...**Forecast consensus places Istanbul's overnight low for September 18 in the mid-to-upper teens Celsius, driving the near-even split between sub-14°C and 23°C+ buckets.** Multiple models, including GFS and regional runs, project daytime highs near 24–27°C under partly cloudy skies with light northeast winds, yielding minimums of 15–19°C depending on cloud cover and boundary-layer mixing. Radiative cooling rates overnight will hinge on whether skies clear enough for stronger heat loss or remain influenced by marine air from the Sea of Marmara. Ensemble spreads and recent model updates show modest variability around these values, leaving room for either cooler drainage or warmer advection to shift the exact minimum. Updated runs and official Turkish Meteorological Service guidance over the next 48 hours will refine the range before resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions