Latest ensemble forecasts from European and global models indicate a daily maximum near 22–23 °C in Helsinki on August 9, driven by a transient ridge of high pressure yielding light southerly flow, limited cloud cover during peak heating hours, and Baltic Sea surface temperatures near 18 °C that moderate overnight minima while allowing modest daytime warming. Traders weigh these against typical late-summer climatology of 19–20 °C highs and the potential for increased marine layer or scattered showers to cap readings below 22 °C. With the two leading outcomes separated by just 6 percentage points, market sentiment reflects model spread in boundary-layer mixing and exact timing of any frontal passage, underscoring the narrow uncertainty range typical for short-range temperature prediction in maritime climates.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Helsinki on August 9?
Highest temperature in Helsinki on August 9?
22°C 42%
23°C 36%
24°C 10%
21°C 9%
NEW
NEW
Aug 9, 2026
18°C or below
2%
19°C
3%
20°C
5%
21°C
9%
22°C
42%
23°C
36%
24°C
10%
25°C
6%
26°C
2%
27°C
2%
28°C or higher
<1%
22°C 42%
23°C 36%
24°C 10%
21°C 9%
NEW
NEW
Aug 9, 2026
18°C or below
$5 Vol.
2%
19°C
$5 Vol.
3%
20°C
$29 Vol.
5%
21°C
$94 Vol.
9%
22°C
$69 Vol.
42%
23°C
$282 Vol.
36%
24°C
$16 Vol.
10%
25°C
$199 Vol.
6%
26°C
$5 Vol.
2%
27°C
$5 Vol.
2%
28°C or higher
$125 Vol.
<1%
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 9 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °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.Latest ensemble forecasts from European and global models indicate a daily maximum near 22–23 °C in Helsinki on August 9, driven by a transient ridge of high pressure yielding light southerly flow, limited cloud cover during peak heating hours, and Baltic Sea surface temperatures near 18 °C that moderate overnight minima while allowing modest daytime warming. Traders weigh these against typical late-summer climatology of 19–20 °C highs and the potential for increased marine layer or scattered showers to cap readings below 22 °C. With the two leading outcomes separated by just 6 percentage points, market sentiment reflects model spread in boundary-layer mixing and exact timing of any frontal passage, underscoring the narrow uncertainty range typical for short-range temperature prediction in maritime climates.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 9 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °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.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 9 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °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: Aug 7, 2026, 12:04 AM ET
Volume
$835End Date
Aug 9, 2026Market Opened
Aug 7, 2026, 12:04 AM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 9 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °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.Latest ensemble forecasts from European and global models indicate a daily maximum near 22–23 °C in Helsinki on August 9, driven by a transient ridge of high pressure yielding light southerly flow, limited cloud cover during peak heating hours, and Baltic Sea surface temperatures near 18 °C that moderate overnight minima while allowing modest daytime warming. Traders weigh these against typical late-summer climatology of 19–20 °C highs and the potential for increased marine layer or scattered showers to cap readings below 22 °C. With the two leading outcomes separated by just 6 percentage points, market sentiment reflects model spread in boundary-layer mixing and exact timing of any frontal passage, underscoring the narrow uncertainty range typical for short-range temperature prediction in maritime climates.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 9 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °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.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 9 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °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.
Volume
$835End Date
Aug 9, 2026Market Opened
Aug 7, 2026, 12:04 AM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...Latest ensemble forecasts from European and global models indicate a daily maximum near 22–23 °C in Helsinki on August 9, driven by a transient ridge of high pressure yielding light southerly flow, limited cloud cover during peak heating hours, and Baltic Sea surface temperatures near 18 °C that moderate overnight minima while allowing modest daytime warming. Traders weigh these against typical late-summer climatology of 19–20 °C highs and the potential for increased marine layer or scattered showers to cap readings below 22 °C. With the two leading outcomes separated by just 6 percentage points, market sentiment reflects model spread in boundary-layer mixing and exact timing of any frontal passage, underscoring the narrow uncertainty range typical for short-range temperature prediction in maritime climates.
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