Official forecasts from the Finnish Meteorological Institute indicate Helsinki's temperature will reach a minimum of 5°C overnight on October 12, with values holding steady near that level through late evening amid persistent cloud cover and light rain. These conditions limit radiative cooling, consistent with model consensus and recent observations showing overnight readings clustered between 5–7°C. Historical October 12 lows average near 4.9°C, but current atmospheric stability and moisture support the market's near-certain 5°C outcome. A sudden clearing of skies could allow further cooling toward 3–4°C, though forecasters assign low probability to that shift before resolution.