How to use

isRaining

method

in

net.minecraft.world.storage.WorldInfo

@Override
public WeatherType getWeather() {
  WorldInfo info = getWorld().getWorldInfo();
  if (info.isThundering()) {
    return WeatherTypes.THUNDER_STORM;
  }
  if (info.isRaining()) {
    return WeatherTypes.RAIN;
  }
  return WeatherTypes.CLEAR;
}

@Override
public long getRemainingWeatherDuration() {
  WorldInfo info = getWorld().getWorldInfo();
  if (info.isThundering()) {
    return info.getThunderTime();
  }
  if (info.isRaining()) {
    return info.getRainTime();
  }
  return info.getCleanWeatherTime();
}

  public static void resetRainTime(World w){
    w.getWorldInfo().setRainTime(w.rand.nextInt(w.getWorldInfo().isRaining() ? 12000 : 168000) + 12000);
  }
}

if (world.getWorldInfo().isRaining()) light *= 0.5;
if (world.getWorldInfo().isThundering()) light *= 0.5;

if (!event.world.getWorldInfo().isRaining() && event.world.getWorldInfo().getRainTime() > 36000)
  if (!event.world.getWorldInfo().isRaining() && event.world.getWorldInfo().getRainTime() > 96000)

element.powerEfficency = 1 - (element.descriptor.electricalPowerRatioLostOffset + element.descriptor.electricalPowerRatioLostPerBlock * distance);
if (world.getWorldInfo().isRaining()) element.powerEfficency *= 0.707;
if (world.getWorldInfo().isThundering()) element.powerEfficency *= 0.707;