Weather icons not displaying for 18-hour and 6-day forecasts

[Glenn Brumfield]

18-hour and 6-day forecasts do not display icons for weather conditions (i.e. overcast, rain, mostly cloudy, etc.) This started in Mythbuntu 14.04/Mythtv 0.27; I didn't report it because 0.28 was coming out with bug fixes. It does not seem to matter which weather stations in the USA are selected, the weather icons do not display. I am currently getting weather for Slidell Airport, Louisiana, USA, but this problem also occurs with the Sioux Falls Regional Airport (Joe Foss Field), South Dakota, USA.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: mythweather 2:0.28.0+fixes.20161115.43fcdd9-0ubuntu0mythbuntu3 [origin: LP-PPA-mythbuntu-0.28]
ProcVersionSignature: Ubuntu 4.4.0-47.68-generic 4.4.24
Uname: Linux 4.4.0-47-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CrashDB: mythbuntu
CurrentDesktop: XFCE
Date: Wed Nov 16 09:51:16 2016
InstallationDate: Installed on 2016-11-13 (2 days ago)
InstallationMedia: Mythbuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
Installed_mythtv_dbg: 2:0.28.0+fixes.20161115.43fcdd9-0ubuntu0mythbuntu3
SourcePackage: mythtv
UpgradeStatus: No upgrade log present (probably fresh install)