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Highest temperature in San Francisco on April 19?

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Highest temperature in San Francisco on April 19?

Apr 17

Apr 18

Apr 19

Apr 17

Apr 18

Apr 19

66-67°F 34%

64-65°F 26%

68-69°F 17%

62-63°F 15%

Polymarket
NEW

66-67°F 34%

64-65°F 26%

68-69°F 17%

62-63°F 15%

Polymarket
NEW

51°F or below

$544 Vol.

1%

52-53°F

$413 Vol.

1%

54-55°F

$486 Vol.

1%

56-57°F

$290 Vol.

1%

58-59°F

$117 Vol.

2%

60-61°F

$86 Vol.

7%

62-63°F

$54 Vol.

15%

64-65°F

$128 Vol.

26%

66-67°F

$136 Vol.

34%

68-69°F

$147 Vol.

17%

70°F or higher

$201 Vol.

6%

This market will resolve to the temperature range that contains the highest temperature recorded at the San Francisco International Airport Station in degrees Fahrenheit on 19 Apr '26. The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the San Francisco International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFO. 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 to "Yes" until all data for this date has been finalized. The resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). 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.Trader consensus on Polymarket favors a mid-60s°F high temperature in San Francisco on April 19, with 66-67°F at 34.5% and 64-65°F at 26.5% implied probabilities, reflecting the latest GFS and ECMWF ensemble guidance projecting peaks around 65-67°F amid persistent northwest onshore flow and marine layer influence. These close odds stem from model spread in stratus cloud persistence—earlier burn-off could push toward 66-67°F, while stubborn fog risks capping at 64-65°F—compounded by cool Pacific sea surface temperatures near 55-57°F that sustain coastal cooling. April climatology at SFO supports this range (historical average high 63°F), following brief offshore winds on April 17 that minimally affected the coast. Watch NWS updates and 12Z model runs on April 18 for potential shifts.

This market will resolve to the temperature range that contains the highest temperature recorded at the San Francisco International Airport Station in degrees Fahrenheit on 19 Apr '26.

The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the San Francisco International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFO.

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 to "Yes" until all data for this date has been finalized.

The resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). 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.
Volume
$2,581
End Date
Apr 19, 2026
Market Opened
Apr 17, 2026, 12:44 AM ET

Resolution Source

https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFO

Resolver

0x69c47De9D...
This market will resolve to the temperature range that contains the highest temperature recorded at the San Francisco International Airport Station in degrees Fahrenheit on 19 Apr '26. The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the San Francisco International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFO. 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 to "Yes" until all data for this date has been finalized. The resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). 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.
This market will resolve to the temperature range that contains the highest temperature recorded at the San Francisco International Airport Station in degrees Fahrenheit on 19 Apr '26. The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the San Francisco International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFO. 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 to "Yes" until all data for this date has been finalized. The resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). 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.Trader consensus on Polymarket favors a mid-60s°F high temperature in San Francisco on April 19, with 66-67°F at 34.5% and 64-65°F at 26.5% implied probabilities, reflecting the latest GFS and ECMWF ensemble guidance projecting peaks around 65-67°F amid persistent northwest onshore flow and marine layer influence. These close odds stem from model spread in stratus cloud persistence—earlier burn-off could push toward 66-67°F, while stubborn fog risks capping at 64-65°F—compounded by cool Pacific sea surface temperatures near 55-57°F that sustain coastal cooling. April climatology at SFO supports this range (historical average high 63°F), following brief offshore winds on April 17 that minimally affected the coast. Watch NWS updates and 12Z model runs on April 18 for potential shifts.

This market will resolve to the temperature range that contains the highest temperature recorded at the San Francisco International Airport Station in degrees Fahrenheit on 19 Apr '26.

The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the San Francisco International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFO.

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 to "Yes" until all data for this date has been finalized.

The resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). 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.
Volume
$2,581
End Date
Apr 19, 2026
Market Opened
Apr 17, 2026, 12:44 AM ET

Resolution Source

https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFO

Resolver

0x69c47De9D...
This market will resolve to the temperature range that contains the highest temperature recorded at the San Francisco International Airport Station in degrees Fahrenheit on 19 Apr '26. The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the San Francisco International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/ca/san-francisco/KSFO. 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 to "Yes" until all data for this date has been finalized. The resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). 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.

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Frequently Asked Questions

"Highest temperature in San Francisco on April 19?" is a prediction market on Polymarket with 11 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "66-67°F" at 34%, followed by "64-65°F" at 26%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 34¢ implies that the market collectively assigns a 34% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

"Highest temperature in San Francisco on April 19?" is a newly created market on Polymarket, launched on Apr 17, 2026. As an early market, this is your opportunity to be among the first traders to set the odds and establish the market's initial price signals. You can also bookmark this page to track volume and trading activity as the market gains traction over time.

To trade on "Highest temperature in San Francisco on April 19?," browse the 11 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "Highest temperature in San Francisco on April 19?" is "66-67°F" at 34%, meaning the market assigns a 34% chance to that outcome. The next closest outcome is "64-65°F" at 26%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "Highest temperature in San Francisco on April 19?" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.