Where are you collecting current temps? They seem to be 10 degrees lower in the Reno, NV area.
Current temperatures are those observed by meteo. stations (airports or private).
Click on "reported temp" to see the latest reported.
Click on a temperature to see where is coming from (in the example Lake Tahoe airport).
Also you can see the quality of observation
(some private automatic weather stations are not reliable because of lack of maintenance).