法国即时天气 — Instant Weather › Live Weather
The Live Weather page displays current atmospheric parameters measured and modeled above your municipality: air temperature at 2 meters, wind chill and humidex, wind speed and gusts, barometric pressure, relative humidity, dew point and hourly forecasts.
Air temperature is measured under a ventilated shelter at 2 meters above ground. Feels-like temperature incorporates wind cooling in winter (Wind Chill) and moisture heat stress in summer (Humidex).
Tracking atmospheric pressure helps anticipate weather changes: a pressure above 1020 hPa usually indicates stable anticyclonic conditions, whereas a rapid drop below 1005 hPa signals an approaching Atlantic low-pressure system.
When air temperature cools down to the dew point temperature during the night, water vapor condenses into droplets, forming dew, frost or radiation fog at dawn.
Standard anemometers measure wind speed and peak gusts at 10 meters above unobstructed ground.
Standard atmospheric pressure at sea level is 1013.25 hectopascals (hPa).
The urban heat island effect traps heat in densely built areas overnight, while rural valleys and forests cool much faster through radiative heat loss.