Forecast models for Warsaw on September 22 point to a maximum temperature near 16–17°C as the most likely outcome, driven by a west-northwest flow bringing cooler maritime air and widespread cloud cover with periods of light rain or drizzle. These conditions limit daytime solar heating and keep the boundary layer moist, consistent with the recent cooling trend observed after mid-September warmth. Ensemble guidance shows modest spread around these values, with slight differences in frontal timing or wind strength determining whether the high reaches 15°C or edges toward 18°C. Updated runs from major centers in the next 24–48 hours will refine the exact peak before resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Warsaw on September 22?
16°C 42%
17°C 35%
15°C 31%
18°C 27%
11°C or below
4%
12°C
4%
13°C
15%
14°C
14%
15°C
31%
16°C
42%
17°C
35%
18°C
27%
19°C
16%
20°C
5%
21°C or higher
4%
16°C 42%
17°C 35%
15°C 31%
18°C 27%
11°C or below
4%
12°C
4%
13°C
15%
14°C
14%
15°C
31%
16°C
42%
17°C
35%
18°C
27%
19°C
16%
20°C
5%
21°C or higher
4%
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=epwa
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 20, 2026, 12:57 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=epwaResolver
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=epwa
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.
Resolution Source
https://www.weather.gov/wrh/timeseries?site=epwaResolver
0x69c47De9D...Forecast models for Warsaw on September 22 point to a maximum temperature near 16–17°C as the most likely outcome, driven by a west-northwest flow bringing cooler maritime air and widespread cloud cover with periods of light rain or drizzle. These conditions limit daytime solar heating and keep the boundary layer moist, consistent with the recent cooling trend observed after mid-September warmth. Ensemble guidance shows modest spread around these values, with slight differences in frontal timing or wind strength determining whether the high reaches 15°C or edges toward 18°C. Updated runs from major centers in the next 24–48 hours will refine the exact peak 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