Forecast models from sources including the GFS and Met Office project Moscow's minimum temperature on September 15 to reach 8–10 °C overnight, driven by mostly clear to partly cloudy skies, light northerly winds of 2–4 m/s, and radiative cooling under high pressure near 1017 hPa. These conditions allow surface heat loss after daytime highs of 14–17 °C, aligning with the climatological average low of about 8 °C for the date. Trader consensus clusters around 9–10 °C because small differences in model timing of the minimum, residual cloud cover, or dew-point depression can shift the exact low by 1 °C. Updated hourly observations through late evening show temperatures already falling through 11–12 °C, with final resolution depending on the coldest reading before sunrise.