This market has settled: RESOLVED
Settled on March 22, 2026
Will Seattle have between 5 and 6 inches of precipitation in March?
Will Seattle have between 5 and 6 inches of precipitation in March? Odds: 39.3% YES on Polymarket. See live prices and trade this market.
Seattle March Precipitation Market Analysis
Current Odds
| Platform | Yes | No | Volume | Trade |
|---|---|---|---|---|
| Polymarket | 41.9% | 58.1% | $10K | Trade on Polymarket |
Market Analysis
The market is pricing in a 41.9% probability that Seattle receives between 5-6 inches of precipitation during March 2026, suggesting traders view this outcome as moderately unlikely but still plausible. This weather-based prediction market matters because March represents Seattle’s transition month between winter and spring precipitation patterns, making the outcome genuinely uncertain and dependent on atmospheric conditions that won’t solidify until weeks before expiry.
The bull case for YES rests on Seattle’s historical volatility during March, when atmospheric rivers occasionally push through the Pacific Northwest with significant moisture. March 2024 saw Seattle receive 4.9 inches, and March 2023 delivered 5.2 inches, establishing recent precedent for outcomes within the 5-6 inch band. If a late-season atmospheric river system develops in late February or early March 2026, the precipitation threshold becomes highly achievable. Climate patterns through 2025 will provide crucial signals—if 2025 shows elevated winter precipitation accumulation, warm Pacific waters, and stronger jet stream positioning, the odds of significant March rain increase materially.
The bear case emphasizes that Seattle’s long-term March average sits around 5.5 inches, but with substantial variance; March 2022 recorded only 2.1 inches, and March 2021 just 2.6 inches. Dry springs are increasingly common in the Pacific Northwest due to shifting climate patterns and the decline of late-winter precipitation. The current 41.9% odds already price in reasonable probability of both drier outcomes (below 5 inches) and wetter outcomes (above 6 inches), suggesting the market sees the narrow 5-6 inch band as a relatively constrained outcome compared to broader possibilities.
Traders should monitor the NOAA Climate Prediction Center’s long-range forecasts beginning in January 2026, which will provide guidance on atmospheric circulation patterns for March. The February 2026 precipitation total becomes a critical leading indicator—sustained wet patterns in February typically continue into early March, while dry February conditions often persist. Watch also for tropical sea surface temperature anomalies (El Niño/La Niña status) by late 2025, as these significantly influence North Pacific jet stream positioning and therefore Seattle precipitation delivery mechanisms.
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Frequently Asked Questions
How does Seattle’s precipitation measurement methodology affect this market outcome?
Official measurements come from the National Weather Service Seattle station at Sea-Tac Airport; trades should verify exact measurement location and collection standards, as precipitation can vary significantly across the metro area and errors in location assumptions could create mispricing.
What happens if March 2026 produces exactly 5.0 or 6.0 inches of precipitation?
Market resolution depends on the specific contract wording—some markets use “between” inclusively (5.0-6.0 counts as YES) while others exclude boundaries; traders must confirm the exact resolution criteria with the platform before committing capital.
How far in advance can meaningful forecast signals emerge for this market?
Operational forecasts become reliably skillful only 10-14 days out, but climate indicators like Pacific sea surface temperatures and atmospheric pressure patterns can suggest March precipitation likelihood by late January 2026, allowing informed position adjustments 2 months before expiry.