Resolution criteria

This market resolves to YES if the official daily maximum temperature (high) at San Diego International Airport (SAN/KSAN) is recorded at 85.0°F or higher on any day from Friday, September 4, 2026, through Monday, September 7, 2026 (inclusive). Otherwise, this market resolves to NO.

The official daily maximum temperature will be verified using the National Weather Service (NWS) San Diego climate data. The primary source of truth will be the NWS NOWData portal for the San Diego Area (station: "San Diego Lindbergh Field" / "San Diego Intl AP"), accessible via NWS San Diego Climate.

Traders can verify the daily high temperatures by selecting "Daily data for a month" for September 2026 on the NOWData tool or by reviewing the NWS Daily Climate Report (CLI) or Preliminary Monthly Climate Data (CF6) for San Diego.

Background

San Diego International Airport (SAN) is located directly on the coast, where the marine layer strongly moderates daily temperatures. While inland areas of San Diego County frequently experience extreme heat in late summer, SAN rarely sees temperatures reach 85.0°F unless a strong high-pressure system or offshore (Santa Ana) wind pattern suppresses the cool sea breeze. Labor Day Weekend (September 4–7, 2026) falls during the transition to San Diego's historically warmest month (September), making brief late-summer heat spikes possible.

This description was generated by AI. Review and verify everything here yourself. You can edit, replace, or delete any part of this description, including the resolution criteria. You do not need to trust the AI output.