I’ve already check this thread. Unfortunatelly this doesn’t work for new weather module. Anyway I finally figure it out:
.weather .weather-icon .wi-day-sunny{
  color: #ffff00;
}
.weather .weather-icon .wi-day-cloudy{
  color: #aaa;
}
.weather .weather-icon .wi-cloudy{
  color: #aaa;
}
.weather .weather-icon .wi-cloudy-windy{
  color: #aaa;
}
.weather .weather-icon .wi-showers{
  color: #55acee;
}
.weather .weather-icon .wi-rain{
  color: #55acee;
}
.weather .weather-icon .wi-thunderstorm{
  color: #ff00ff;
}
.weather .weather-icon .wi-snow{
  color: #fff;
}
.weather .weather-icon .wi-fog{
  color: #999;
}
.weather .weather-icon .wi-night-clear{
  color: #fff;
}
.weather .weather-icon .wi-night-cloudy{
  color: #aaa;
}
.weather .weather-icon .wi-night-showers{
  color: #55acee;
}
.weather .weather-icon .wi-night-rain{
  color: #55acee;
}
.weather .weather-icon .wi-night-thunderstorm{
  color: #ff00ff;
}
.weather .weather-icon .wi-night-snow{
  color: #fff;
}
.weather .weather-icon .wi-night-alt-cloudy-windy{
  color: #aaa;
}
.weather .wi-day-sunny{
  color: #ffff00;
}
.weather .wi-day-cloudy{
  color: #aaa;
}
.weather .wi-cloudy{
  color: #aaa;
}
.weather .wi-cloudy-windy{
  color: #aaa;
}
.weather .wi-showers{
  color: #55acee;
}
.weather .wi-rain{
  color: #55acee;
}
.weather .wi-thunderstorm{
  color: #ff00ff;
}
.weather .wi-snow{
  color: #fff;
}
.weather .wi-fog{
  color: #999;
}
.weather .wi-night-clear{
  color: #fff;
}
.weather .wi-night-cloudy{
  color: #aaa;
}
.weather .wi-night-showers{
  color: #55acee;
}
.weather .wi-night-rain{
  color: #55acee;
}
.weather .wi-night-thunderstorm{
  color: #ff00ff;
}
.weather .wi-night-snow{
  color: #fff;
}
.weather .wi-night-alt-cloudy-windy{
  color: #aaa;
}
.weather .wi-strong-wind {
  color: #e0fbff;
}
.weather .wi-sunset {
  color: #ffa500;
}
.weather .wi-sunrise {
  color: #ffa500;
}
