Significant divergence exists. Mainstream weather sources (e.g., Google Weather, AccuWeather, Time and Date) forecast a high of 18°C or 19°C (64-67°F) for Cape Town International Airport on April 15. However, Polymarket funds are heavily concentrated on the 20°C, 21°C, and 22°C options (summing to over 70%). This is likely due to traders failing to update their models with the latest precise daily forecasts, or confusing the city center's temperature with the specific airport station readings, which often differ slightly.