This market asks whether the 5-year average annual temperature at John Wayne Airport (KSNA) in Orange County will exceed the 1991-2020 climate normal of 65.3°F by at least 0.5°F (threshold 65.8°F) during 2026-2030. Current July 2026 data shows temperatures running exactly at normal (71.9°F, 0.0°F departure), though cooling degree days are running 161% above normal, indicating recent warmth. The key drivers remain a persistent marine heatwave (80-100% chance through end of 2026) and a strengthening El Niño (81%+ probability, virtual certainty). Historical KSNA data shows 2022 reached 66.74°F—well above the 65.8°F threshold—demonstrating the target is achievable. Southern California's long-term warming trend of +0.41-0.5°F per decade, combined with the current extreme oceanic and atmospheric conditions, strongly supports the market's existing high confidence that the 2026-2030 average will exceed the threshold. The quote remains at 97, reflecting very high confidence in a YES resolution.
Ocean temperatures off California reached highest June levels in 177 years of record-keeping, coinciding with building historic El Niño event
Strengthening El Niño expected to reinforce warming; waters off California and Baja California face persistent marine heat wave conditions through 2026
National Weather Service forecasts a powerful El Niño in the Pacific Ocean will likely bring heavy rains to Southern California during winter 2026-27, with 63% chance of a very strong event ranking among the largest in 75 years.
NOAA and Weather West report 90% odds of strong El Niño and 60% odds of very strong event, with marine heatwave already present off California coast
NOAA Climate Prediction Center confirms El Niño conditions are present and expected to strengthen into Winter 2026-27, with 63% chance of very strong event
