Wrong temperature makes climbing impossible

I have been flying in south America this week and I always encounter this problem. The temp. at high altitudes is way too high. For example, at F390 in Peru it's around -50 deg C according to NOAA, but FSRealWx sets FSX to something like -30, making the plane unable to even climb to cruising altitude. However the numbers shown in the program seems pretty correct (-52 deg @ 200mb). I use SimConnect + FSUIPC for the interface option.

Hope you can get this fixed soon. Thanks.

OK I've found the issue is present only when using the SimConnect (or SimConnect + FSUIPC). I changed the interface option to FSUIPC and everything is working fine right now.

Some test results:

Location: somewhere at the boundary between Peru and Bolivia, @ FL390

with SimConnect -22 deg C
with SimConnect + FSUIPC -22 deg C
with FSUIPC -47 deg C
from NOAA weather chart -52 to -53 deg C