Inaccurate current local temps.
When comparing your current temps to temps published by a number of other sources including NWS(NOAA) AeroWeather, FlightPlan.com, and the on airport ASOS your temps are wildly inaccurate varying from 15 degrees above to 15 degrees below the actual current temperature. At 1200 Zulu time current Juneau, AK temp is 5 deg F. Your reading is 18 deg F.
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Weather Live° - Local Forecast, v5.8