Trader consensus on Polymarket reflects high uncertainty for Amsterdam's highest temperature on April 3, 2026, with equal implied probabilities across outcomes from 5°C or below to 13°C, driven by divergent short-range model outputs amid variable spring weather patterns. The Royal Netherlands Meteorological Institute (KNMI) latest forecast, issued early April 3, projects a maximum of 11°C under heavily overcast skies with 20% sunshine, light rain (1 mm, 60% chance), and southwest winds at force 4, limiting solar heating and capping peaks near climatological early-April norms of 11–12°C. Ensemble spreads in the KNMI Weerpluim indicate potential swings from persistent clouds holding temps near 6–8°C to brief clearings pushing toward 13°C; real-time observations from Schiphol Airport station will resolve the market, with updates throughout the day clarifying cloud evolution and insolation.