I have Dark Sky in the middle main complication window in Modular. It shows the high and low temp, plus sunrise or sunset time, and finally a short description. Dark Sky in theory is also supposed to be able to warn you with ample time if a thunderstorm is coming in your area. So I think Dark Sky is the best. But I also like a backup weather complication. The Weather (from the The Weather Channel) has a percent precipitation with an umbrella icon. Weather uses a nice yellow sun icon when it's sunny out. Otherwise, most weather apps are white in color and I use multicolor Modular. Would be nice to have more color in my watch face. Any other weather apps you like. Sometimes I have a third weather app with the temp in Celsius so I can get a feel and get to know temperatures in Celsius.