Hi, this is what i use in my items file…
// Forecast Hour48
Image owmForecastHour48Icon "2 Tage Vorhersage Wetterlage Icon" {channel="openweathermap:weather-and-forecast:api:local:forecastHours48#icon"}
String owmForecastHour48Condition "2 Tage Vorhersage Wetterlage [%s]" {channel="openweathermap:weather-and-forecast:api:local:forecastHours48#condition"}
String owmForecastHour48ConditionId "2 Tage Vorhersage Wetterlage ID [%s]" {channel="openweathermap:weather-and-forecast:api:local:forecastHours48#condition-id"}
String owmForecastHour48IconId "2 Tage Vorhersage Wetterlage Icon ID" {channel="openweathermap:weather-and-forecast:api:local:forecastHours48#icon-id"}
Number:Temperature owmForecastHour48Temperature "2 Tage Vorhersage Temperatur [%.1f %unit%]" {channel="openweathermap:weather-and-forecast:api:local:forecastHours48#temperature"}
Number:Pressure owmForecastHour48Pressure "2 Tage Vorhersage Luftdruck [%.1f %unit%]" {channel="openweathermap:weather-and-forecast:api:local:forecastHours48#pressure"}
Number:Dimensionless owmForecastHour48Humidity "2 Tage Vorhersage Luftfeuchtigkeit [%.1f %unit%]" {channel="openweathermap:weather-and-forecast:api:local:forecastHours48#humidity"}
Number:Speed owmForecastHour48WindSpeed "2 Tage Vorhersage Windgeschwindigkeit [%.1f km/h]" {channel="openweathermap:weather-and-forecast:api:local:forecastHours48#wind-speed"}
//Number:Dimensionless owmForecastHour48WindDirection "2 Tage Vorhersage Windrichtung [SCALE(wind.scale):%s]" {channel="openweathermap:weather-and-forecast:api:local:forecastHours48#wind-direction"}
Number:Angle owmForecastHour48WindDirection2 "2 Tage Vorhersage Windrichtung [%d %unit%]" {channel="openweathermap:weather-and-forecast:api:local:forecastHours48#wind-direction"}
Number:Dimensionless owmForecastHour48Cloudiness "2 Tage Vorhersage Bewölkung [%.1f %unit%]" {channel="openweathermap:weather-and-forecast:api:local:forecastHours48#cloudiness"}
Number:Length owmForecastHour48Rain "2 Tage Vorhersage Regen [%.1f %unit%]" {channel="openweathermap:weather-and-forecast:api:local:forecastHours48#rain"}
Number:Length owmForecastHour48Snow "2 Tage Vorhersage Schneefall [%.1f %unit%]" {channel="openweathermap:weather-and-forecast:api:local:forecastHours48#snow"}
DateTime owmForecastHour48Timestamp "2 Tage Vorhersage Zeit [%1$tA, %1$td.%1$tm.%1$tY %1$tH:%1$tM]" {channel="openweathermap:weather-and-forecast:api:local:forecastHours48#time-stamp"}
sometimes you have to wait a couple of minutes to get the first data… but works perfectly here…
hope this helps