Current ensemble forecasts for Paris indicate a daytime high of 15–16°C on May 18 under mild spring conditions driven by moderate southwesterly flow from the Atlantic. Variable cloud cover and isolated light showers are expected to limit solar heating, keeping temperatures near seasonal norms rather than allowing stronger warming. Model consensus shows limited potential for afternoon clearing that could push readings to 17°C, while persistent low stratus or earlier precipitation would favor a 15°C peak. These near-term dynamics explain the tight market split between the two leading outcomes, with fresh 48-hour model runs from European centers remaining the key variable for traders.