**Marine layer persistence and typical summer onshore flow are anchoring trader expectations for San Francisco's August 21 low near the long-term average.** Official forecasts from the National Weather Service and private sources project overnight lows in the upper 50s (around 56–57°F), consistent with the 1991–2020 climatological normal of 55.9°F for the date. The cold California Current, combined with a marine layer near 1,500 feet and steady west-northwest winds of 10–20 mph, promotes efficient radiational cooling under cloudy or foggy conditions without allowing significant inland warming. Recent August 2026 observations show similar patterns, with daily lows predominantly in the mid- to upper 50s and no anomalous heat or suppressed marine influence emerging in model guidance. This keeps probabilities concentrated on 54–59°F outcomes, reflecting the low likelihood of records (historical minimum 50°F) or warmer deviations given the entrenched stratus and onshore regime. Traders appear to weigh the narrow forecast spread and climatological reliability heavily, with minimal movement expected absent a sudden shift in the upper-level trough or wind patterns.
Polymarket ডেটা রেফারেন্স করে পরীক্ষামূলক AI-জেনারেটেড সারাংশ। এটি ট্রেডিং পরামর্শ নয় এবং এই মার্কেট কীভাবে রেজলভ হয় তাতে কোনো ভূমিকা রাখে না। · আপডেটেডLowest temperature in San Francisco on August 21?
58-59°F 33%
54-55°F 28%
56-57°F 28%
52-53°F 16%
49°F or below
<1%
50-51°F
<1%
52-53°F
16%
54-55°F
28%
56-57°F
28%
58-59°F
33%
60-61°F
<1%
62-63°F
<1%
64-65°F
<1%
66-67°F
<1%
68°F or higher
<1%
58-59°F 33%
54-55°F 28%
56-57°F 28%
52-53°F 16%
49°F or below
<1%
50-51°F
<1%
52-53°F
16%
54-55°F
28%
56-57°F
28%
58-59°F
33%
60-61°F
<1%
62-63°F
<1%
64-65°F
<1%
66-67°F
<1%
68°F or higher
<1%
This market will resolve to the temperature range that contains the lowest temperature recorded at the San Francisco International Airport Station in degrees Fahrenheit on 21 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the lowest temperature recorded for all times on this day for the San Francisco International Airport Station, 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 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 Fahrenheit (eg, 21°F). 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.
মার্কেট ওপেন হয়েছে: Aug 20, 2026, 1:30 PM ET
Resolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest temperature recorded at the San Francisco International Airport Station in degrees Fahrenheit on 21 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the lowest temperature recorded for all times on this day for the San Francisco International Airport Station, 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 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 Fahrenheit (eg, 21°F). 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...**Marine layer persistence and typical summer onshore flow are anchoring trader expectations for San Francisco's August 21 low near the long-term average.** Official forecasts from the National Weather Service and private sources project overnight lows in the upper 50s (around 56–57°F), consistent with the 1991–2020 climatological normal of 55.9°F for the date. The cold California Current, combined with a marine layer near 1,500 feet and steady west-northwest winds of 10–20 mph, promotes efficient radiational cooling under cloudy or foggy conditions without allowing significant inland warming. Recent August 2026 observations show similar patterns, with daily lows predominantly in the mid- to upper 50s and no anomalous heat or suppressed marine influence emerging in model guidance. This keeps probabilities concentrated on 54–59°F outcomes, reflecting the low likelihood of records (historical minimum 50°F) or warmer deviations given the entrenched stratus and onshore regime. Traders appear to weigh the narrow forecast spread and climatological reliability heavily, with minimal movement expected absent a sudden shift in the upper-level trough or wind patterns.
Polymarket ডেটা রেফারেন্স করে পরীক্ষামূলক AI-জেনারেটেড সারাংশ। এটি ট্রেডিং পরামর্শ নয় এবং এই মার্কেট কীভাবে রেজলভ হয় তাতে কোনো ভূমিকা রাখে না। · আপডেটেড
বাহ্যিক লিংক থেকে সাবধান।
বাহ্যিক লিংক থেকে সাবধান।
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