**Forecast models for Panama City, Panama, on September 17, 2026, point to a nighttime low near 25°C, consistent with the September climatological average of about 24°C.** Recent runs from sources like Worldmeteo and The Weather Network indicate 25–26°C, with high precipitation probabilities (often 85–100% daytime) and persistent cloud cover limiting radiative cooling. In this tropical setting, overnight minimums depend primarily on cloud cover, humidity, and wind. Thick clouds and showers trap longwave radiation, suppressing cooling and supporting the higher end of the range (25–26°C or above). Clear or partly cloudy conditions with lighter winds allow greater heat loss, potentially dipping toward 24°C or lower. Current guidance shows widespread moisture and trade-wind influences, which favor the narrower spread around 25°C rather than significant departures. Trader sentiment reflects this tight scientific uncertainty: leading outcomes cluster between 24–30°C with closely matched implied probabilities (44–47%), as small differences in model timing of rain or cloud breaks can shift the exact minimum by 1–2°C. Upcoming model updates and real-time observations will likely refine the outcome before resolution.